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poly2tri/common/shapes.cc
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333
poly2tri/common/shapes.cc
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/*
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* Poly2Tri Copyright (c) 2009-2010, Mason Green
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* http://code.google.com/p/poly2tri/
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
|
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* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
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||||
*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "shapes.h"
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Triangle::Triangle(Point& a, Point& b, Point& c) {
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points_[0] = &a; points_[1] = &b; points_[2] = &c;
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neighbors_[0] = NULL; neighbors_[1] = NULL; neighbors_[2] = NULL;
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constrained_edge[0] = constrained_edge[1] = constrained_edge[2] = false;
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delaunay_edge[0] = delaunay_edge[1] = delaunay_edge[2] = false;
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interior = false;
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}
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Triangle::~Triangle() {
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printf("bye triangle\n");
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}
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// Update neighbor pointers
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void Triangle::MarkNeighbor(Point* p1, Point* p2, Triangle* t) {
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if((p1 == points_[2] && p2 == points_[1]) || (p1 == points_[1] && p2 == points_[2]))
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neighbors_[0] = t;
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else if((p1 == points_[0] && p2 == points_[2]) || (p1 == points_[2] && p2 == points_[0]))
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neighbors_[1] = t;
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else if((p1 == points_[0] && p2 == points_[1]) || (p1 == points_[1] && p2 == points_[0]))
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neighbors_[2] = t;
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else
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assert(0);
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}
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// Exhaustive search to update neighbor pointers
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void Triangle::MarkNeighbor(Triangle& t) {
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if (t.Contains(points_[1], points_[2])) {
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neighbors_[0] = &t;
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t.MarkNeighbor(points_[1], points_[2], this);
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} else if(t.Contains(points_[0], points_[2])) {
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neighbors_[1] = &t;
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t.MarkNeighbor(points_[0], points_[2], this);
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} else if (t.Contains(points_[0], points_[1])) {
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neighbors_[2] = &t;
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t.MarkNeighbor(points_[0], points_[1], this);
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}
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}
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void Triangle::ClearNeighbors() {
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neighbors_[0] = NULL;
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neighbors_[1] = NULL;
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neighbors_[2] = NULL;
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}
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void Triangle::ClearDelunayEdges() {
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delaunay_edge[0] = delaunay_edge[1] = delaunay_edge[2] = false;
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}
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Point* Triangle::OppositePoint(Triangle& t, Point& p) {
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Point *cw = t.PointCW(p);
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double x = cw->x;
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double y = cw->y;
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x = p.x;
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y = p.y;
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Point* ham = PointCW(*cw);
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return PointCW(*cw);
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}
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// Legalized triangle by rotating clockwise around point(0)
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void Triangle::Legalize(Point& point) {
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points_[1] = points_[0];
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points_[0] = points_[2];
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points_[2] = &point;
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}
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// Legalize triagnle by rotating clockwise around oPoint
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void Triangle::Legalize(Point& opoint, Point& npoint) {
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if(&opoint == points_[0]) {
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points_[1] = points_[0];
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points_[0] = points_[2];
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points_[2] = &npoint;
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} else if (&opoint == points_[1]) {
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points_[2] = points_[1];
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points_[1] = points_[0];
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points_[0] = &npoint;
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} else if (&opoint == points_[2]) {
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points_[0] = points_[2];
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points_[2] = points_[1];
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points_[1] = &npoint;
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} else {
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assert(0);
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}
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}
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int Triangle::Index(const Point* p) {
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if(p == points_[0]) {
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return 0;
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} else if(p == points_[1]) {
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return 1;
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} else if(p == points_[2]) {
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return 2;
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}
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assert(0);
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}
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int Triangle::EdgeIndex(const Point* p1, const Point* p2) {
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if(points_[0] == p1) {
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if(points_[1] == p2){
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return 2;
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} else if(points_[2] == p2){
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return 1;
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}
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}
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else if(points_[1] == p1) {
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if(points_[2] == p2) {
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return 0;
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} else if(points_[0] == p2) {
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return 2;
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}
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} else if(points_[2] == p1) {
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if(points_[0] == p2 ) {
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return 1;
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} else if(points_[1] == p2) {
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return 0;
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}
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}
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return -1;
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}
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void Triangle::MarkConstrainedEdge(const int index) {
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constrained_edge[index] = true;
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}
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void Triangle::MarkConstrainedEdge(Edge& edge) {
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MarkConstrainedEdge(edge.p, edge.q);
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if((edge.q == points_[0] && edge.p == points_[1]) || (edge.q == points_[1] && edge.p == points_[0])) {
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constrained_edge[2] = true;
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} else if((edge.q == points_[0] && edge.p == points_[2]) || (edge.q == points_[2] && edge.p == points_[0])) {
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constrained_edge[1] = true;
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} else if(( edge.q == points_[1] && edge.p == points_[2]) || (edge.q == points_[2] && edge.p == points_[1])) {
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constrained_edge[0] = true;
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}
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}
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// Mark edge as constrained
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void Triangle::MarkConstrainedEdge(Point* p, Point* q) {
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if((q == points_[0] && p == points_[1] ) || (q == points_[1] && p == points_[0])) {
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constrained_edge[2] = true;
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} else if((q == points_[0] && p == points_[2] ) || (q == points_[2] && p == points_[0])) {
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constrained_edge[1] = true;
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} else if((q == points_[1] && p == points_[2] ) || (q == points_[2] && p == points_[1])) {
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constrained_edge[0] = true;
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}
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}
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// The point counter-clockwise to given point
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Point* Triangle::PointCW(Point& point) {
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if(&point == points_[0]) {
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return points_[2];
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} else if(&point == points_[1]) {
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return points_[0];
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} else if(&point == points_[2]) {
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return points_[1];
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}
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assert(0);
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}
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// The point counter-clockwise to given point
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Point* Triangle::PointCCW(Point& point) {
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if(&point == points_[0]) {
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return points_[1];
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} else if(&point == points_[1]) {
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return points_[2];
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} else if(&point == points_[2]) {
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return points_[0];
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}
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assert(0);
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}
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// The neighbor clockwise to given point
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Triangle* Triangle::NeighborCW(Point& point) {
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if(&point == points_[0]) {
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return neighbors_[1];
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} else if(&point == points_[1]) {
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return neighbors_[2];
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}
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return neighbors_[0];
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}
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// The neighbor counter-clockwise to given point
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Triangle* Triangle::NeighborCCW(Point& point) {
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if(&point == points_[0]) {
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return neighbors_[2];
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} else if(&point == points_[1]) {
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return neighbors_[0];
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}
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return neighbors_[1];
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}
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bool Triangle::GetConstrainedEdgeCCW(Point& p) {
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if(&p == points_[0]) {
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return constrained_edge[2];
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} else if(&p == points_[1]) {
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return constrained_edge[0];
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}
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return constrained_edge[1];
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}
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bool Triangle::GetConstrainedEdgeCW(Point& p) {
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if(&p == points_[0]) {
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return constrained_edge[1];
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} else if(&p == points_[1]) {
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return constrained_edge[2];
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}
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return constrained_edge[0];
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}
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void Triangle::SetConstrainedEdgeCCW(Point& p, bool ce) {
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if(&p == points_[0]) {
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constrained_edge[2] = ce;
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} else if(&p == points_[1]) {
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constrained_edge[0] = ce;
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} else {
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constrained_edge[1] = ce;
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}
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}
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void Triangle::SetConstrainedEdgeCW(Point& p, bool ce) {
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if(&p == points_[0]) {
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constrained_edge[1] = ce;
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} else if(&p == points_[1]) {
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constrained_edge[2] = ce;
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} else {
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constrained_edge[0] = ce;
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}
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}
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bool Triangle::GetDelunayEdgeCCW(Point& p) {
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if(&p == points_[0]){
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return delaunay_edge[2];
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} else if(&p == points_[1]) {
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return delaunay_edge[0];
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}
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return delaunay_edge[1];
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}
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bool Triangle::GetDelunayEdgeCW(Point& p) {
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if(&p == points_[0]) {
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return delaunay_edge[1];
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} else if(&p == points_[1]) {
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return delaunay_edge[2];
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}
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return delaunay_edge[0];
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}
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void Triangle::SetDelunayEdgeCCW(Point& p, bool e) {
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if(&p == points_[0]) {
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delaunay_edge[2] = e;
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} else if(&p == points_[1]) {
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delaunay_edge[0] = e;
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} else {
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delaunay_edge[1] = e;
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}
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}
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void Triangle::SetDelunayEdgeCW(Point& p, bool e) {
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if(&p == points_[0]) {
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delaunay_edge[1] = e;
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} else if(&p == points_[1]) {
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delaunay_edge[2] = e;
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} else {
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delaunay_edge[0] = e;
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}
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}
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// The neighbor across to given point
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Triangle& Triangle::NeighborAcross(Point& opoint) {
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if(&opoint == points_[0]) {
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return *neighbors_[0];
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} else if(&opoint == points_[1]) {
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return *neighbors_[1];
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}
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return *neighbors_[2];
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}
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277
poly2tri/common/shapes.h
Normal file
277
poly2tri/common/shapes.h
Normal file
@ -0,0 +1,277 @@
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/*
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* Poly2Tri Copyright (c) 2009-2010, Mason Green
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* http://code.google.com/p/poly2tri/
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*
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* All rights reserved.
|
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*
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* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
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// Include guard
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#ifndef SHAPES_H
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#define SHAPES_H
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#include <vector>
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#include <cstddef>
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#include <assert.h>
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#include <cmath>
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#include <stdio.h>
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#include <iostream>
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struct Node;
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struct Edge;
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struct Point {
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double x, y;
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/// Default constructor does nothing (for performance).
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Point() {}
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/// The edges this point constitutes an upper ending point
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std::vector<Edge> edge_list;
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/// Construct using coordinates.
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Point(double x, double y) : x(x), y(y) {}
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/// Set this point to all zeros.
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void set_zero() { x = 0.0f; y = 0.0f; }
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/// Set this point to some specified coordinates.
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void set(double x_, double y_) { x = x_; y = y_; }
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/// Negate this point.
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Point operator -() const { Point v; v.set(-x, -y); return v; }
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/// Add a point to this point.
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void operator += (const Point& v) {
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x += v.x; y += v.y;
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}
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/// Subtract a point from this point.
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void operator -= (const Point& v) {
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x -= v.x; y -= v.y;
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}
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/// Multiply this point by a scalar.
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void operator *= (double a) {
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x *= a; y *= a;
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}
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/// Get the length of this point (the norm).
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double Length() const {
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return sqrt(x * x + y * y);
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}
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||||
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||||
/// Convert this point into a unit point. Returns the Length.
|
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double Normalize() {
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double len = Length();
|
||||
x /= len;
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y /= len;
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return len;
|
||||
}
|
||||
|
||||
};
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||||
|
||||
// Represents a simple polygon's edge
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struct Edge {
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Point* p, *q;
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/// Constructor
|
||||
Edge(Point& p1, Point& p2) : p(&p1), q(&p2) {
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||||
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||||
if(p1.y > p2.y) {
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||||
q = &p1;
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||||
p = &p2;
|
||||
} else if(p1.y == p2.y) {
|
||||
if(p1.x > p2.x) {
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||||
q = &p1;
|
||||
p = &p2;
|
||||
} else if(p1.x == p2.x) {
|
||||
assert(false);
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||||
}
|
||||
}
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||||
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||||
q->edge_list.push_back(*this);
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||||
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
// Triangle-based data structures are know to have better performance than quad-edge structures
|
||||
// See: J. Shewchuk, "Triangle: Engineering a 2D Quality Mesh Generator and Delaunay Triangulator"
|
||||
// "Triangulations in CGAL"
|
||||
class Triangle {
|
||||
|
||||
public:
|
||||
|
||||
/// Constructor
|
||||
Triangle(Point& a, Point& b, Point& c);
|
||||
// Destroctor
|
||||
~Triangle();
|
||||
|
||||
/// Flags to determine if an edge is a Constrained edge
|
||||
bool constrained_edge[3];
|
||||
/// Flags to determine if an edge is a Delauney edge
|
||||
bool delaunay_edge[3];
|
||||
/// Has this triangle been marked as an interior triangle?
|
||||
bool interior;
|
||||
|
||||
Point* GetPoint(const int& index);
|
||||
Point* PointCW(Point& point);
|
||||
Point* PointCCW(Point& point);
|
||||
Point* OppositePoint(Triangle& t, Point& p);
|
||||
|
||||
Triangle* GetNeighbor(const int& index);
|
||||
void MarkNeighbor(Point* p1, Point* p2, Triangle* t);
|
||||
void MarkNeighbor(Triangle& t);
|
||||
|
||||
void MarkConstrainedEdge(const int index);
|
||||
void MarkConstrainedEdge(Edge& edge);
|
||||
void MarkConstrainedEdge(Point* p, Point* q);
|
||||
|
||||
int Index(const Point* p);
|
||||
int EdgeIndex(const Point* p1, const Point* p2);
|
||||
|
||||
Triangle* NeighborCW(Point& point);
|
||||
Triangle* NeighborCCW(Point& point);
|
||||
bool GetConstrainedEdgeCCW(Point& p);
|
||||
bool GetConstrainedEdgeCW(Point& p);
|
||||
void SetConstrainedEdgeCCW(Point& p, bool ce);
|
||||
void SetConstrainedEdgeCW(Point& p, bool ce);
|
||||
bool GetDelunayEdgeCCW(Point& p);
|
||||
bool GetDelunayEdgeCW(Point& p);
|
||||
void SetDelunayEdgeCCW(Point& p, bool e);
|
||||
void SetDelunayEdgeCW(Point& p, bool e);
|
||||
|
||||
bool Contains(Point* p);
|
||||
bool Contains(const Edge& e);
|
||||
bool Contains(Point* p, Point* q);
|
||||
void Legalize(Point& point);
|
||||
void Legalize(Point& opoint, Point& npoint);
|
||||
void ClearNeighbors();
|
||||
void ClearDelunayEdges();
|
||||
|
||||
Triangle& NeighborAcross(Point& opoint);
|
||||
|
||||
private:
|
||||
|
||||
/// Triangle points
|
||||
Point* points_[3];
|
||||
/// Neighbor list
|
||||
Triangle* neighbors_[3];
|
||||
|
||||
};
|
||||
|
||||
inline bool operator < (const Point& a, const Point& b) {
|
||||
if (a.y < b.y) {
|
||||
return true;
|
||||
} else if (a.y == b.y) {
|
||||
// Make sure q is point with greater x value
|
||||
if(a.x < b.x) {
|
||||
return true;
|
||||
} else if (a.x > b.x) {
|
||||
return false;
|
||||
} else {
|
||||
// Repeat point
|
||||
//std::cout << "Repeat points not alowed: ";
|
||||
//std::cout << a.x << "," << a.y << " " << b.x << "," << b.y << std::endl;
|
||||
//assert(false);
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/// Add two points_ component-wise.
|
||||
inline Point operator + (const Point& a, const Point& b) {
|
||||
return Point(a.x + b.x, a.y + b.y);
|
||||
}
|
||||
|
||||
/// Subtract two points_ component-wise.
|
||||
inline Point operator - (const Point& a, const Point& b) {
|
||||
return Point(a.x - b.x, a.y - b.y);
|
||||
}
|
||||
|
||||
/// Multiply point by scalar
|
||||
inline Point operator * (double s, const Point& a) {
|
||||
return Point(s * a.x, s * a.y);
|
||||
}
|
||||
|
||||
inline bool operator == (const Point& a, const Point& b) {
|
||||
return a.x == b.x && a.y == b.y;
|
||||
}
|
||||
|
||||
inline bool operator != (const Point& a, const Point& b) {
|
||||
return a.x != b.x && a.y != b.y;
|
||||
}
|
||||
|
||||
inline bool operator != (const Node& a, const Node& b) {
|
||||
return a != b;
|
||||
}
|
||||
|
||||
/// Peform the dot product on two vectors.
|
||||
inline double Dot(const Point& a, const Point& b) {
|
||||
return a.x * b.x + a.y * b.y;
|
||||
}
|
||||
|
||||
/// Perform the cross product on two vectors. In 2D this produces a scalar.
|
||||
inline double Cross(const Point& a, const Point& b) {
|
||||
return a.x * b.y - a.y * b.x;
|
||||
}
|
||||
|
||||
/// Perform the cross product on a point and a scalar. In 2D this produces
|
||||
/// a point.
|
||||
inline Point Cross(const Point& a, double s) {
|
||||
return Point(s * a.y, -s * a.x);
|
||||
}
|
||||
|
||||
/// Perform the cross product on a scalar and a point. In 2D this produces
|
||||
/// a point.
|
||||
inline Point Cross(const double s, const Point& a) {
|
||||
return Point(-s * a.y, s * a.x);
|
||||
}
|
||||
|
||||
inline Point* Triangle::GetPoint(const int& index) {
|
||||
return points_[index];
|
||||
}
|
||||
|
||||
inline Triangle* Triangle::GetNeighbor(const int& index) {
|
||||
return neighbors_[index];
|
||||
}
|
||||
|
||||
inline bool Triangle::Contains(Point* p) {
|
||||
return p == points_[0] || p == points_[1] || p == points_[2];
|
||||
}
|
||||
|
||||
inline bool Triangle::Contains(const Edge& e) {
|
||||
return Contains(e.p) && Contains(e.q);
|
||||
}
|
||||
|
||||
inline bool Triangle::Contains(Point* p, Point* q) {
|
||||
return Contains(p) && Contains(q);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
98
poly2tri/common/utils.h
Normal file
98
poly2tri/common/utils.h
Normal file
@ -0,0 +1,98 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include <stdexcept>
|
||||
#include <math.h>
|
||||
|
||||
#include "shapes.h"
|
||||
|
||||
template<typename T, int size>
|
||||
int array_length(T(&)[size]){return size;}
|
||||
|
||||
const double PI_3div4 = 3*M_PI/4;
|
||||
const double EPSILON = 1e-12;
|
||||
|
||||
enum Orientation { CW, CCW, COLLINEAR };
|
||||
|
||||
/**
|
||||
* Forumla to calculate signed area<br>
|
||||
* Positive if CCW<br>
|
||||
* Negative if CW<br>
|
||||
* 0 if collinear<br>
|
||||
* <pre>
|
||||
* A[P1,P2,P3] = (x1*y2 - y1*x2) + (x2*y3 - y2*x3) + (x3*y1 - y3*x1)
|
||||
* = (x1-x3)*(y2-y3) - (y1-y3)*(x2-x3)
|
||||
* </pre>
|
||||
*/
|
||||
Orientation Orient2d(Point& pa, Point& pb, Point& pc ) {
|
||||
|
||||
double detleft = (pa.x - pc.x) * (pb.y - pc.y);
|
||||
double detright = (pa.y - pc.y) * (pb.x - pc.x);
|
||||
double val = detleft - detright;
|
||||
if( val > -EPSILON && val < EPSILON ) {
|
||||
return COLLINEAR;
|
||||
} else if( val > 0 ) {
|
||||
return CCW;
|
||||
}
|
||||
return CW;
|
||||
|
||||
}
|
||||
|
||||
bool InScanArea(Point& pa, Point& pb, Point& pc, Point& pd) {
|
||||
|
||||
const double pdx = pd.x;
|
||||
const double pdy = pd.y;
|
||||
const double adx = pa.x - pdx;
|
||||
const double ady = pa.y - pdy;
|
||||
const double bdx = pb.x - pdx;
|
||||
const double bdy = pb.y - pdy;
|
||||
|
||||
const double adxbdy = adx * bdy;
|
||||
const double bdxady = bdx * ady;
|
||||
const double oabd = adxbdy - bdxady;
|
||||
|
||||
if(oabd <= 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const double cdx = pc.x - pdx;
|
||||
const double cdy = pc.y - pdy;
|
||||
|
||||
const double cdxady = cdx * ady;
|
||||
const double adxcdy = adx * cdy;
|
||||
const double ocad = cdxady - adxcdy;
|
||||
|
||||
if(ocad <= 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
2
poly2tri/poly2tri.h
Normal file
2
poly2tri/poly2tri.h
Normal file
@ -0,0 +1,2 @@
|
||||
#include "common/shapes.h"
|
||||
#include "sweep/cdt.h"
|
||||
95
poly2tri/sweep/advancing_front.cc
Normal file
95
poly2tri/sweep/advancing_front.cc
Normal file
@ -0,0 +1,95 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include "advancing_front.h"
|
||||
|
||||
Node* AdvancingFront::Locate(const double& x) {
|
||||
|
||||
Node* node = search_node_;
|
||||
|
||||
if(x < node->value) {
|
||||
while((node = node->prev) != NULL) {
|
||||
if(x >= node->value) {
|
||||
search_node_ = node;
|
||||
return node;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
while((node = node->next) != NULL) {
|
||||
if(x < node->value) {
|
||||
search_node_ = node->prev;
|
||||
return node->prev;
|
||||
}
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
Node* AdvancingFront::FindSearchNode(const double& x) {
|
||||
// TODO: implement BST index
|
||||
return search_node_;
|
||||
}
|
||||
|
||||
Node* AdvancingFront::LocatePoint(Point* point) {
|
||||
|
||||
const double px = point->x;
|
||||
Node* node = FindSearchNode(px);
|
||||
const double nx = node->point->x;
|
||||
|
||||
if(px == nx) {
|
||||
if(point != node->point) {
|
||||
// We might have two nodes with same x value for a short time
|
||||
if(point == node->prev->point) {
|
||||
node = node->prev;
|
||||
} else if(point == node->next->point) {
|
||||
node = node->next;
|
||||
} else {
|
||||
assert(0);
|
||||
}
|
||||
}
|
||||
} else if(px < nx) {
|
||||
while((node = node->prev) != NULL) {
|
||||
if(point == node->point) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
while((node = node->next) != NULL) {
|
||||
if(point == node->point)
|
||||
break;
|
||||
}
|
||||
}
|
||||
search_node_ = node;
|
||||
return node;
|
||||
}
|
||||
|
||||
AdvancingFront::~AdvancingFront() {
|
||||
delete head_; search_node_; tail_;
|
||||
}
|
||||
98
poly2tri/sweep/advancing_front.h
Normal file
98
poly2tri/sweep/advancing_front.h
Normal file
@ -0,0 +1,98 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include "../common/shapes.h"
|
||||
|
||||
struct Node;
|
||||
|
||||
// Advancing front node
|
||||
struct Node {
|
||||
|
||||
Point* point;
|
||||
Triangle* triangle;
|
||||
|
||||
Node* next;
|
||||
Node* prev;
|
||||
|
||||
double value;
|
||||
|
||||
Node(Point& p) : point(&p), triangle(NULL), value(p.x), next(NULL), prev(NULL) {}
|
||||
|
||||
Node(Point& p, Triangle& t) : point(&p), triangle(&t), value(p.x),
|
||||
next(NULL), prev(NULL) {}
|
||||
|
||||
/*
|
||||
~Node() {
|
||||
printf("going... ");
|
||||
printf("bye node");
|
||||
printf(" ... gone!\n");
|
||||
}
|
||||
*/
|
||||
|
||||
};
|
||||
|
||||
// Advancing front
|
||||
class AdvancingFront {
|
||||
|
||||
public:
|
||||
|
||||
// Destructor
|
||||
~AdvancingFront();
|
||||
|
||||
Node* head();
|
||||
void set_head(Node* node);
|
||||
Node* tail();
|
||||
void set_tail(Node* node);
|
||||
Node* search();
|
||||
void set_search(Node* node);
|
||||
|
||||
/// Locate insertion point along advancing front
|
||||
Node* Locate(const double& x);
|
||||
|
||||
Node* LocatePoint(Point* point);
|
||||
|
||||
private:
|
||||
|
||||
Node* head_, *tail_, *search_node_;
|
||||
|
||||
Node* FindSearchNode(const double& x);
|
||||
|
||||
};
|
||||
|
||||
inline Node* AdvancingFront::head() { return head_; }
|
||||
inline void AdvancingFront::set_head(Node* node) { head_ = node; }
|
||||
|
||||
inline Node* AdvancingFront::tail() { return tail_; }
|
||||
inline void AdvancingFront::set_tail(Node* node) { tail_ = node; }
|
||||
|
||||
inline Node* AdvancingFront::search() { return search_node_; }
|
||||
|
||||
inline void AdvancingFront::set_search(Node* node) { search_node_ = node; }
|
||||
|
||||
54
poly2tri/sweep/cdt.cc
Normal file
54
poly2tri/sweep/cdt.cc
Normal file
@ -0,0 +1,54 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include "cdt.h"
|
||||
|
||||
CDT::CDT(Point polyline[], const int& point_count) {
|
||||
sweep_context_ = new SweepContext(polyline, point_count);
|
||||
sweep_ = new Sweep;
|
||||
}
|
||||
|
||||
void CDT::AddHole(const Point poly_line[], const int point_count) {
|
||||
|
||||
}
|
||||
|
||||
void CDT::Triangulate() {
|
||||
sweep_->Triangulate(*sweep_context_);
|
||||
}
|
||||
|
||||
std::list<Triangle*> CDT::GetTriangles() {
|
||||
return sweep_context_->GetTriangles();
|
||||
}
|
||||
|
||||
CDT::~CDT() {
|
||||
delete sweep_context_;
|
||||
delete sweep_;
|
||||
}
|
||||
|
||||
58
poly2tri/sweep/cdt.h
Normal file
58
poly2tri/sweep/cdt.h
Normal file
@ -0,0 +1,58 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include "advancing_front.h"
|
||||
#include "mesh.h"
|
||||
#include "sweep_context.h"
|
||||
#include "sweep.h"
|
||||
|
||||
class CDT
|
||||
{
|
||||
|
||||
public:
|
||||
|
||||
/// Constructor
|
||||
CDT(Point poly_line[], const int& point_count);
|
||||
/// Add a hole
|
||||
void AddHole(const Point poly_line[], const int point_count);
|
||||
/// Triangulate points
|
||||
void Triangulate();
|
||||
/// Get Delaunay triangles
|
||||
std::list<Triangle*> GetTriangles();
|
||||
|
||||
private:
|
||||
|
||||
SweepContext* sweep_context_;
|
||||
Sweep* sweep_;
|
||||
|
||||
/// Destructor
|
||||
~CDT();
|
||||
|
||||
};
|
||||
49
poly2tri/sweep/mesh.cc
Normal file
49
poly2tri/sweep/mesh.cc
Normal file
@ -0,0 +1,49 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include "mesh.h"
|
||||
|
||||
// Recursively collect interior triangles and clean the mesh
|
||||
// Excludes exterior triangles outside constrained edges
|
||||
// Depth first search
|
||||
|
||||
void Mesh::clean(Triangle& triangle)
|
||||
{
|
||||
/*
|
||||
if(triangle != NULL && !triangle.interior)
|
||||
{
|
||||
triangle.interior = true;
|
||||
triangles += triangle;
|
||||
for(i <- 0 until 3)
|
||||
if(!triangle.edges(i))
|
||||
clean(triangle.neighbors(i));
|
||||
}
|
||||
*/
|
||||
}
|
||||
50
poly2tri/sweep/mesh.h
Normal file
50
poly2tri/sweep/mesh.h
Normal file
@ -0,0 +1,50 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include <vector>
|
||||
using namespace std;
|
||||
|
||||
class Triangle;
|
||||
|
||||
class Mesh
|
||||
{
|
||||
|
||||
public:
|
||||
|
||||
/// Triangles that constitute the mesh
|
||||
vector<Triangle> map;
|
||||
|
||||
// Debug triangles
|
||||
//val debug = new ArrayBuffer[Triangle]
|
||||
//val triangles = new ArrayBuffer[Triangle]
|
||||
|
||||
void clean(Triangle& triangle);
|
||||
|
||||
};
|
||||
882
poly2tri/sweep/sweep.cc
Normal file
882
poly2tri/sweep/sweep.cc
Normal file
@ -0,0 +1,882 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include "sweep.h"
|
||||
#include "sweep_context.h"
|
||||
#include "advancing_front.h"
|
||||
#include "../common/utils.h"
|
||||
|
||||
// Triangulate simple polygon with holes
|
||||
void Sweep::Triangulate(SweepContext& tcx) {
|
||||
|
||||
tcx.CreateAdvancingFront();
|
||||
|
||||
// Sweep points; build mesh
|
||||
SweepPoints(tcx);
|
||||
|
||||
/*
|
||||
// Finalize triangulation
|
||||
if( tcx.getTriangulationMode() == TriangulationMode.Polygon ) {
|
||||
finalizationPolygon( tcx );
|
||||
} else {
|
||||
finalizationConvexHull( tcx );
|
||||
}
|
||||
*/
|
||||
|
||||
}
|
||||
|
||||
void Sweep::SweepPoints(SweepContext& tcx ) {
|
||||
|
||||
for(int i = 1; i < tcx.point_count(); i++ ) {
|
||||
|
||||
Point& point = *tcx.GetPoint(i);
|
||||
Node& node = PointEvent(tcx, point);
|
||||
|
||||
for(int i = 0; i < point.edge_list.size(); i++) {
|
||||
EdgeEvent(tcx, point.edge_list[i], node );
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Find closes node to the left of the new point and
|
||||
* create a new triangle. If needed new holes and basins
|
||||
* will be filled to.
|
||||
*
|
||||
* @param tcx
|
||||
* @param point
|
||||
* @return
|
||||
*/
|
||||
Node& Sweep::PointEvent(SweepContext& tcx, Point& point) {
|
||||
|
||||
Node& node = tcx.LocateNode(point);
|
||||
Node& new_node = NewFrontTriangle(tcx, point, node);
|
||||
|
||||
// Only need to check +epsilon since point never have smaller
|
||||
// x value than node due to how we fetch nodes from the front
|
||||
if(point.x <= node.point->x + EPSILON) {
|
||||
Fill(tcx, node);
|
||||
}
|
||||
|
||||
//tcx.AddNode(new_node);
|
||||
|
||||
FillAdvancingFront(tcx, new_node);
|
||||
return new_node;
|
||||
}
|
||||
|
||||
void Sweep::EdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
tcx.edge_event.constrained_edge = &edge;
|
||||
tcx.edge_event.right = edge.p->x > edge.q->x;
|
||||
|
||||
if(IsEdgeSideOfTriangle(*node.triangle, *edge.p, *edge.q)){
|
||||
return;
|
||||
}
|
||||
|
||||
// For now we will do all needed filling
|
||||
// TODO: integrate with flip process might give some better performance
|
||||
// but for now this avoid the issue with cases that needs both flips and fills
|
||||
FillEdgeEvent(tcx, edge, node);
|
||||
EdgeEvent(tcx, *edge.p, *edge.q , node.triangle, *edge.q);
|
||||
|
||||
}
|
||||
|
||||
void Sweep::EdgeEvent(SweepContext& tcx, Point& ep, Point& eq, Triangle* triangle, Point& point) {
|
||||
|
||||
if(IsEdgeSideOfTriangle(*triangle, ep, eq)) {
|
||||
return;
|
||||
}
|
||||
|
||||
Point* p1 = triangle->PointCCW(point);
|
||||
Orientation o1 = Orient2d(eq, *p1, ep);
|
||||
if(o1 == COLLINEAR) {
|
||||
//throw new RuntimeException( "EdgeEvent - Collinear not supported" );
|
||||
assert(false);
|
||||
}
|
||||
|
||||
Point* p2 = triangle->PointCW(point);
|
||||
Orientation o2 = Orient2d(eq, *p2, ep);
|
||||
if(o2 == COLLINEAR) {
|
||||
//throw new RuntimeException( "EdgeEvent - Collinear not supported" );
|
||||
assert(false);
|
||||
}
|
||||
|
||||
if(o1 == o2) {
|
||||
// Need to decide if we are rotating CW or CCW to get to a triangle
|
||||
// that will cross edge
|
||||
if(o1 == CW) {
|
||||
triangle = triangle->NeighborCCW(point);
|
||||
} else {
|
||||
triangle = triangle->NeighborCW(point);
|
||||
}
|
||||
EdgeEvent(tcx, ep, eq, triangle, point);
|
||||
} else {
|
||||
// This triangle crosses constraint so lets flippin start!
|
||||
FlipEdgeEvent(tcx, ep, eq, *triangle, point);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
bool Sweep::IsEdgeSideOfTriangle(Triangle& triangle, Point& ep, Point& eq) {
|
||||
|
||||
int index = triangle.EdgeIndex(&ep, &eq);
|
||||
if(index != -1) {
|
||||
triangle.MarkConstrainedEdge(index);
|
||||
Triangle* t = triangle.GetNeighbor(index);
|
||||
if(t){
|
||||
t->MarkConstrainedEdge(&ep, &eq);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
Node& Sweep::NewFrontTriangle(SweepContext& tcx, Point& point, Node& node ) {
|
||||
|
||||
Triangle* triangle = new Triangle(point, *node.point, *node.next->point);
|
||||
|
||||
triangle->MarkNeighbor(*node.triangle);
|
||||
tcx.AddToMap(triangle);
|
||||
|
||||
Node* new_node = new Node(point);
|
||||
new_node->next = node.next;
|
||||
new_node->prev = &node;
|
||||
node.next->prev = new_node;
|
||||
node.next = new_node;
|
||||
|
||||
if(!Legalize(tcx, *triangle)) {
|
||||
tcx.MapTriangleToNodes(*triangle);
|
||||
}
|
||||
|
||||
return *new_node;
|
||||
}
|
||||
|
||||
/**
|
||||
* Adds a triangle to the advancing front to fill a hole.
|
||||
* @param tcx
|
||||
* @param node - middle node, that is the bottom of the hole
|
||||
*/
|
||||
void Sweep::Fill(SweepContext& tcx, Node& node) {
|
||||
|
||||
Triangle* triangle = new Triangle(*node.prev->point, *node.point,
|
||||
*node.next->point);
|
||||
|
||||
// TODO: should copy the constrained_edge value from neighbor triangles
|
||||
// for now constrained_edge values are copied during the legalize
|
||||
triangle->MarkNeighbor(*node.prev->triangle);
|
||||
triangle->MarkNeighbor(*node.triangle);
|
||||
|
||||
tcx.AddToMap(triangle);
|
||||
|
||||
// Update the advancing front
|
||||
node.prev->next = node.next;
|
||||
node.next->prev = node.prev;
|
||||
|
||||
// If it was legalized the triangle has already been mapped
|
||||
if(!Legalize(tcx, *triangle)) {
|
||||
tcx.MapTriangleToNodes(*triangle);
|
||||
}
|
||||
|
||||
// TODO: delete node from memory
|
||||
//tcx.RemoveNode(node);
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Fills holes in the Advancing Front
|
||||
*
|
||||
*
|
||||
* @param tcx
|
||||
* @param n
|
||||
*/
|
||||
void Sweep::FillAdvancingFront(SweepContext& tcx, Node& n) {
|
||||
|
||||
// Fill right holes
|
||||
Node* node = n.next;
|
||||
|
||||
while(node->next) {
|
||||
double angle = HoleAngle(*node);
|
||||
if(angle > M_PI_2 || angle < -M_PI_2) break;
|
||||
Fill(tcx, *node);
|
||||
node = node->next;
|
||||
}
|
||||
|
||||
// Fill left holes
|
||||
node = n.prev;
|
||||
|
||||
while(node->prev) {
|
||||
double angle = HoleAngle(*node);
|
||||
if(angle > M_PI_2 || angle < -M_PI_2) break;
|
||||
Fill(tcx, *node);
|
||||
node = node->prev;
|
||||
}
|
||||
|
||||
// Fill right basins
|
||||
if(n.next && n.next->next) {
|
||||
double angle = BasinAngle(n);
|
||||
if(angle < PI_3div4) {
|
||||
FillBasin(tcx, n);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
double Sweep::BasinAngle(Node& node) {
|
||||
double ax = node.point->x - node.next->next->point->x;
|
||||
double ay = node.point->y - node.next->next->point->y;
|
||||
return atan2(ay, ax);
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param node - middle node
|
||||
* @return the angle between 3 front nodes
|
||||
*/
|
||||
double Sweep::HoleAngle(Node& node) {
|
||||
|
||||
/* Complex plane
|
||||
* ab = cosA +i*sinA
|
||||
* ab = (ax + ay*i)(bx + by*i) = (ax*bx + ay*by) + i(ax*by-ay*bx)
|
||||
* atan2(y,x) computes the principal value of the argument function
|
||||
* applied to the complex number x+iy
|
||||
* Where x = ax*bx + ay*by
|
||||
* y = ax*by - ay*bx
|
||||
*/
|
||||
double ax = node.next->point->x - node.point->x;
|
||||
double ay = node.next->point->y - node.point->y;
|
||||
double bx = node.prev->point->x - node.point->x;
|
||||
double by = node.prev->point->y - node.point->y;
|
||||
return atan2(ax*by - ay*bx, ax*bx + ay*by);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if triangle was legalized
|
||||
*/
|
||||
bool Sweep::Legalize(SweepContext& tcx, Triangle& t) {
|
||||
|
||||
// To legalize a triangle we start by finding if any of the three edges
|
||||
// violate the Delaunay condition
|
||||
for(int i=0; i<3; i++) {
|
||||
|
||||
if(t.delaunay_edge[i])
|
||||
continue;
|
||||
|
||||
Triangle* ot = t.GetNeighbor(i);
|
||||
|
||||
if(ot) {
|
||||
|
||||
Point* p = t.GetPoint(i);
|
||||
Point* op = ot->OppositePoint(t, *p);
|
||||
int oi = ot->Index(op);
|
||||
|
||||
// If this is a Constrained Edge or a Delaunay Edge(only during recursive legalization)
|
||||
// then we should not try to legalize
|
||||
if(ot->constrained_edge[oi] || ot->delaunay_edge[oi]) {
|
||||
t.constrained_edge[i] = ot->constrained_edge[oi];
|
||||
continue;
|
||||
}
|
||||
|
||||
bool inside = Incircle(*p, *t.PointCCW(*p), *t.PointCW(*p), *op);
|
||||
|
||||
if(inside) {
|
||||
|
||||
// Lets mark this shared edge as Delaunay
|
||||
t.delaunay_edge[i] = true;
|
||||
ot->delaunay_edge[oi] = true;
|
||||
|
||||
// Lets rotate shared edge one vertex CW to legalize it
|
||||
RotateTrianglePair(t, *p, *ot, *op);
|
||||
|
||||
// We now got one valid Delaunay Edge shared by two triangles
|
||||
// This gives us 4 new edges to check for Delaunay
|
||||
|
||||
// Make sure that triangle to node mapping is done only one time for a specific triangle
|
||||
bool not_legalized = !Legalize(tcx, t);
|
||||
if(not_legalized) {
|
||||
tcx.MapTriangleToNodes(t);
|
||||
}
|
||||
|
||||
not_legalized = !Legalize(tcx, *ot);
|
||||
if(not_legalized)
|
||||
tcx.MapTriangleToNodes(*ot);
|
||||
|
||||
// Reset the Delaunay edges, since they only are valid Delaunay edges
|
||||
// until we add a new triangle or point.
|
||||
// XXX: need to think about this. Can these edges be tried after we
|
||||
// return to previous recursive level?
|
||||
t.delaunay_edge[i] = false;
|
||||
ot->delaunay_edge[oi] = false;
|
||||
|
||||
// If triangle have been legalized no need to check the other edges since
|
||||
// the recursive legalization will handles those so we can end here.
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>Requirement</b>:<br>
|
||||
* 1. a,b and c form a triangle.<br>
|
||||
* 2. a and d is know to be on opposite side of bc<br>
|
||||
* <pre>
|
||||
* a
|
||||
* +
|
||||
* / \
|
||||
* / \
|
||||
* b/ \c
|
||||
* +-------+
|
||||
* / d \
|
||||
* / \
|
||||
* </pre>
|
||||
* <b>Fact</b>: d has to be in area B to have a chance to be inside the circle formed by
|
||||
* a,b and c<br>
|
||||
* d is outside B if orient2d(a,b,d) or orient2d(c,a,d) is CW<br>
|
||||
* This preknowledge gives us a way to optimize the incircle test
|
||||
* @param a - triangle point, opposite d
|
||||
* @param b - triangle point
|
||||
* @param c - triangle point
|
||||
* @param d - point opposite a
|
||||
* @return true if d is inside circle, false if on circle edge
|
||||
*/
|
||||
bool Sweep::Incircle(Point& pa, Point& pb, Point& pc, Point& pd) {
|
||||
|
||||
double adx = pa.x - pd.x;
|
||||
double ady = pa.y - pd.y;
|
||||
double bdx = pb.x - pd.x;
|
||||
double bdy = pb.y - pd.y;
|
||||
|
||||
double adxbdy = adx * bdy;
|
||||
double bdxady = bdx * ady;
|
||||
double oabd = adxbdy - bdxady;
|
||||
|
||||
if( oabd <= 0 )
|
||||
return false;
|
||||
|
||||
double cdx = pc.x - pd.x;
|
||||
double cdy = pc.y - pd.y;
|
||||
|
||||
double cdxady = cdx * ady;
|
||||
double adxcdy = adx * cdy;
|
||||
double ocad = cdxady - adxcdy;
|
||||
|
||||
if( ocad <= 0 )
|
||||
return false;
|
||||
|
||||
double bdxcdy = bdx * cdy;
|
||||
double cdxbdy = cdx * bdy;
|
||||
|
||||
double alift = adx * adx + ady * ady;
|
||||
double blift = bdx * bdx + bdy * bdy;
|
||||
double clift = cdx * cdx + cdy * cdy;
|
||||
|
||||
double det = alift * ( bdxcdy - cdxbdy ) + blift * ocad + clift * oabd;
|
||||
|
||||
return det > 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Rotates a triangle pair one vertex CW
|
||||
*<pre>
|
||||
* n2 n2
|
||||
* P +-----+ P +-----+
|
||||
* | t /| |\ t |
|
||||
* | / | | \ |
|
||||
* n1| / |n3 n1| \ |n3
|
||||
* | / | after CW | \ |
|
||||
* |/ oT | | oT \|
|
||||
* +-----+ oP +-----+
|
||||
* n4 n4
|
||||
* </pre>
|
||||
*/
|
||||
void Sweep::RotateTrianglePair(Triangle& t, Point& p, Triangle& ot, Point& op) {
|
||||
|
||||
Triangle* n1, *n2, *n3, *n4;
|
||||
n1 = t.NeighborCCW(p);
|
||||
n2 = t.NeighborCW(p);
|
||||
n3 = ot.NeighborCCW(op);
|
||||
n4 = ot.NeighborCW(op);
|
||||
|
||||
bool ce1,ce2,ce3,ce4;
|
||||
ce1 = t.GetConstrainedEdgeCCW(p);
|
||||
ce2 = t.GetConstrainedEdgeCW(p);
|
||||
ce3 = ot.GetConstrainedEdgeCCW(op);
|
||||
ce4 = ot.GetConstrainedEdgeCW(op);
|
||||
|
||||
bool de1,de2,de3,de4;
|
||||
de1 = t.GetDelunayEdgeCCW(p);
|
||||
de2 = t.GetDelunayEdgeCW(p);
|
||||
de3 = ot.GetDelunayEdgeCCW(op);
|
||||
de4 = ot.GetDelunayEdgeCW(op);
|
||||
|
||||
t.Legalize(p, op);
|
||||
ot.Legalize(op, p);
|
||||
|
||||
// Remap delaunay_edge
|
||||
ot.SetDelunayEdgeCCW(p, de1);
|
||||
t.SetDelunayEdgeCW(p, de2);
|
||||
t.SetDelunayEdgeCCW(op, de3);
|
||||
ot.SetDelunayEdgeCW(op, de4);
|
||||
|
||||
// Remap constrained_edge
|
||||
ot.SetConstrainedEdgeCCW(p, ce1);
|
||||
t.SetConstrainedEdgeCW(p, ce2);
|
||||
t.SetConstrainedEdgeCCW(op, ce3);
|
||||
ot.SetConstrainedEdgeCW(op, ce4);
|
||||
|
||||
// Remap neighbors
|
||||
// XXX: might optimize the markNeighbor by keeping track of
|
||||
// what side should be assigned to what neighbor after the
|
||||
// rotation. Now mark neighbor does lots of testing to find
|
||||
// the right side.
|
||||
t.ClearNeighbors();
|
||||
ot.ClearNeighbors();
|
||||
if(n1 != NULL) ot.MarkNeighbor(*n1);
|
||||
if(n2 != NULL) t.MarkNeighbor(*n2);
|
||||
if(n3 != NULL) t.MarkNeighbor(*n3);
|
||||
if(n4 != NULL) ot.MarkNeighbor(*n4);
|
||||
t.MarkNeighbor(ot);
|
||||
}
|
||||
|
||||
/**
|
||||
* Fills a basin that has formed on the Advancing Front to the right
|
||||
* of given node.<br>
|
||||
* First we decide a left,bottom and right node that forms the
|
||||
* boundaries of the basin. Then we do a reqursive fill.
|
||||
*
|
||||
* @param tcx
|
||||
* @param node - starting node, this or next node will be left node
|
||||
*/
|
||||
void Sweep::FillBasin(SweepContext& tcx, Node& node) {
|
||||
|
||||
if(Orient2d(*node.point, *node.next->point, *node.next->next->point ) == CCW) {
|
||||
tcx.basin.left_node = node.next->next;
|
||||
} else {
|
||||
tcx.basin.left_node = node.next;
|
||||
}
|
||||
|
||||
// Find the bottom and right node
|
||||
tcx.basin.bottom_node = tcx.basin.left_node;
|
||||
while(tcx.basin.bottom_node->next
|
||||
&& tcx.basin.bottom_node->point->y >= tcx.basin.bottom_node->next->point->y) {
|
||||
tcx.basin.bottom_node = tcx.basin.bottom_node->next;
|
||||
}
|
||||
if(tcx.basin.bottom_node == tcx.basin.left_node) {
|
||||
// No valid basin
|
||||
return;
|
||||
}
|
||||
|
||||
tcx.basin.right_node = tcx.basin.bottom_node;
|
||||
while(tcx.basin.right_node->next
|
||||
&& tcx.basin.right_node->point->y < tcx.basin.right_node->next->point->y) {
|
||||
tcx.basin.right_node = tcx.basin.right_node->next;
|
||||
}
|
||||
if(tcx.basin.right_node == tcx.basin.bottom_node) {
|
||||
// No valid basins
|
||||
return;
|
||||
}
|
||||
|
||||
tcx.basin.width = tcx.basin.right_node->point->x - tcx.basin.left_node->point->x;
|
||||
tcx.basin.left_highest = tcx.basin.left_node->point->y > tcx.basin.right_node->point->y;
|
||||
|
||||
FillBasinReq(tcx, *tcx.basin.bottom_node);
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Recursive algorithm to fill a Basin with triangles
|
||||
*
|
||||
* @param tcx
|
||||
* @param node - bottom_node
|
||||
* @param cnt - counter used to alternate on even and odd numbers
|
||||
*/
|
||||
void Sweep::FillBasinReq(SweepContext& tcx, Node& node) {
|
||||
|
||||
// if shallow stop filling
|
||||
if(IsShallow(tcx, node)) {
|
||||
return;
|
||||
}
|
||||
|
||||
Fill(tcx, node);
|
||||
|
||||
if(node.prev == tcx.basin.left_node && node.next == tcx.basin.right_node) {
|
||||
return;
|
||||
} else if(node.prev == tcx.basin.left_node) {
|
||||
Orientation o = Orient2d(*node.point, *node.next->point, *node.next->next->point );
|
||||
if(o == CW) {
|
||||
return;
|
||||
}
|
||||
node = *node.next;
|
||||
} else if(node.next == tcx.basin.right_node) {
|
||||
Orientation o = Orient2d(*node.point, *node.prev->point, *node.prev->prev->point);
|
||||
if(o == CCW) {
|
||||
return;
|
||||
}
|
||||
node = *node.prev;
|
||||
} else {
|
||||
// Continue with the neighbor node with lowest Y value
|
||||
if(node.prev->point->y < node.next->point->y) {
|
||||
node = *node.prev;
|
||||
} else {
|
||||
node = *node.next;
|
||||
}
|
||||
}
|
||||
|
||||
FillBasinReq(tcx, node);
|
||||
|
||||
}
|
||||
|
||||
bool Sweep::IsShallow(SweepContext& tcx, Node& node) {
|
||||
|
||||
double height;
|
||||
|
||||
if(tcx.basin.left_highest) {
|
||||
height = tcx.basin.left_node->point->y - node.point->y;
|
||||
} else {
|
||||
height = tcx.basin.right_node->point->y - node.point->y;
|
||||
}
|
||||
|
||||
// if shallow stop filling
|
||||
if(tcx.basin.width > height) {
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
void Sweep::FinalizationConvexHull(SweepContext& tcx) {
|
||||
|
||||
Node& n1 = *tcx.front()->head()->next;
|
||||
Node& n2 = *n1.next;
|
||||
Node& n3 = *n2.next;
|
||||
Point& first = *n1.point;
|
||||
|
||||
TurnAdvancingFrontConvex(tcx, n2, n3);
|
||||
|
||||
// TODO: implement ConvexHull for lower right and left boundary
|
||||
// Lower right boundary
|
||||
first = *tcx.front()->head()->point;
|
||||
n2 = *tcx.front()->tail()->prev;
|
||||
Triangle& t1 = *n2.triangle;
|
||||
Point& p1 = *n2.point;
|
||||
|
||||
do {
|
||||
tcx.RemoveFromMap(&t1);
|
||||
p1 = *t1.PointCCW(p1);
|
||||
if(p1 == first) break;
|
||||
t1 = *t1.NeighborCCW(p1);
|
||||
} while(true);
|
||||
|
||||
// Lower left boundary
|
||||
first = *tcx.front()->head()->next->point;
|
||||
p1 = *t1.PointCW(*tcx.front()->head()->point);
|
||||
t1 = *t1.NeighborCW(*tcx.front()->head()->point);
|
||||
do {
|
||||
tcx.RemoveFromMap(&t1);
|
||||
p1 = *t1.PointCCW(p1);
|
||||
t1 = *t1.NeighborCCW(p1);
|
||||
} while(p1 != first);
|
||||
|
||||
//tcx.FinalizeTriangulation();
|
||||
|
||||
}
|
||||
|
||||
void Sweep::TurnAdvancingFrontConvex(SweepContext& tcx, Node& b, Node& c) {
|
||||
|
||||
Node& first = b;
|
||||
|
||||
while(c != *tcx.front()->tail()) {
|
||||
|
||||
if(Orient2d(*b.point, *c.point, *c.next->point) == CCW) {
|
||||
// [b,c,d] Concave - fill around c
|
||||
Fill(tcx, c);
|
||||
c = *c.next;
|
||||
} else {
|
||||
// [b,c,d] Convex
|
||||
if(b != first && Orient2d(*b.prev->point, *b.point, *c.point) == CCW) {
|
||||
// [a,b,c] Concave - fill around b
|
||||
Fill(tcx, b);
|
||||
b = *b.prev;
|
||||
} else {
|
||||
// [a,b,c] Convex - nothing to fill
|
||||
b = c;
|
||||
c = *c.next;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void Sweep::FillEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
if(tcx.edge_event.right) {
|
||||
FillRightAboveEdgeEvent(tcx, edge, node);
|
||||
} else {
|
||||
FillLeftAboveEdgeEvent(tcx, edge, node);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FillRightAboveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
while(node.next->point->x < edge.p->x) {
|
||||
// Check if next node is below the edge
|
||||
if(Orient2d(*edge.q, *node.next->point, *edge.p) == CCW) {
|
||||
FillRightBelowEdgeEvent(tcx, edge, node);
|
||||
} else {
|
||||
node = *node.next;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FillRightBelowEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
if(node.point->x < edge.p->x) {
|
||||
if(Orient2d(*node.point, *node.next->point, *node.next->next->point ) == CCW ) {
|
||||
// Concave
|
||||
FillRightConcaveEdgeEvent(tcx, edge, node );
|
||||
} else {
|
||||
// Convex
|
||||
FillRightConvexEdgeEvent(tcx, edge, node );
|
||||
// Retry this one
|
||||
FillRightBelowEdgeEvent(tcx, edge, node );
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FillRightConcaveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
Fill(tcx, *node.next);
|
||||
if(node.next->point != edge.p) {
|
||||
// Next above or below edge?
|
||||
if(Orient2d(*edge.q, *node.next->point, *edge.p) == CCW) {
|
||||
// Below
|
||||
if(Orient2d(*node.point, *node.next->point, *node.next->next->point) == CCW) {
|
||||
// Next is concave
|
||||
FillRightConcaveEdgeEvent(tcx, edge, node);
|
||||
} else {
|
||||
// Next is convex
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FillRightConvexEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
// Next concave or convex?
|
||||
if(Orient2d(*node.next->point, *node.next->next->point, *node.next->next->next->point ) == CCW) {
|
||||
// Concave
|
||||
FillRightConcaveEdgeEvent(tcx, edge, *node.next);
|
||||
} else{
|
||||
// Convex
|
||||
// Next above or below edge?
|
||||
if(Orient2d(*edge.q, *node.next->next->point, *edge.p) == CCW) {
|
||||
// Below
|
||||
FillRightConvexEdgeEvent(tcx, edge, *node.next);
|
||||
} else{
|
||||
// Above
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FillLeftAboveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
while(node.prev->point->x > edge.p->x) {
|
||||
// Check if next node is below the edge
|
||||
if(Orient2d(*edge.q, *node.prev->point, *edge.p) == CW) {
|
||||
FillLeftBelowEdgeEvent(tcx, edge, node);
|
||||
} else {
|
||||
node = *node.prev;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FillLeftBelowEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
if( node.point->x > edge.p->x) {
|
||||
if(Orient2d(*node.point, *node.prev->point, *node.prev->prev->point) == CW ) {
|
||||
// Concave
|
||||
FillLeftConcaveEdgeEvent(tcx, edge, node);
|
||||
} else {
|
||||
// Convex
|
||||
FillLeftConvexEdgeEvent(tcx, edge, node);
|
||||
// Retry this one
|
||||
FillLeftBelowEdgeEvent(tcx, edge, node);
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
void Sweep::FillLeftConvexEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
// Next concave or convex?
|
||||
if(Orient2d(*node.prev->point, *node.prev->prev->point, *node.prev->prev->prev->point) == CW) {
|
||||
// Concave
|
||||
FillLeftConcaveEdgeEvent(tcx, edge, *node.prev);
|
||||
} else {
|
||||
// Convex
|
||||
// Next above or below edge?
|
||||
if(Orient2d(*edge.q, *node.prev->prev->point, *edge.p) == CW) {
|
||||
// Below
|
||||
FillLeftConvexEdgeEvent(tcx, edge, *node.prev);
|
||||
} else {
|
||||
// Above
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void Sweep::FillLeftConcaveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node) {
|
||||
|
||||
Fill(tcx, *node.prev);
|
||||
if(node.prev->point != edge.p) {
|
||||
// Next above or below edge?
|
||||
if(Orient2d(*edge.q, *node.prev->point, *edge.p) == CW) {
|
||||
// Below
|
||||
if(Orient2d(*node.point, *node.prev->point, *node.prev->prev->point) == CW) {
|
||||
// Next is concave
|
||||
FillLeftConcaveEdgeEvent(tcx, edge, node);
|
||||
} else {
|
||||
// Next is convex
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FlipEdgeEvent(SweepContext& tcx, Point& ep, Point& eq, Triangle& t, Point& p) {
|
||||
|
||||
Triangle& ot = t.NeighborAcross(p);
|
||||
Point& op = *ot.OppositePoint(t, p);
|
||||
|
||||
if(&t.NeighborAcross(p) == NULL) {
|
||||
// If we want to integrate the fillEdgeEvent do it here
|
||||
// With current implementation we should never get here
|
||||
//throw new RuntimeException( "[BUG:FIXME] FLIP failed due to missing triangle");
|
||||
assert(0);
|
||||
}
|
||||
|
||||
if(InScanArea(p, *t.PointCCW(p), *t.PointCW(p), op)) {
|
||||
// Lets rotate shared edge one vertex CW
|
||||
RotateTrianglePair(t, p, ot, op);
|
||||
tcx.MapTriangleToNodes(t);
|
||||
tcx.MapTriangleToNodes(ot);
|
||||
|
||||
if( p == eq && op == ep ) {
|
||||
if(eq == *tcx.edge_event.constrained_edge->q && ep == *tcx.edge_event.constrained_edge->p) {
|
||||
t.MarkConstrainedEdge(&ep, &eq);
|
||||
ot.MarkConstrainedEdge(&ep, &eq);
|
||||
Legalize(tcx, t);
|
||||
Legalize(tcx, ot);
|
||||
} else {
|
||||
// XXX: I think one of the triangles should be legalized here?
|
||||
}
|
||||
} else {
|
||||
Orientation o = Orient2d(eq, op, ep);
|
||||
t = NextFlipTriangle(tcx, (int) o, t, ot, p, op);
|
||||
FlipEdgeEvent(tcx, ep, eq, t, p);
|
||||
}
|
||||
} else {
|
||||
Point& newP = NextFlipPoint( ep, eq, ot, op);
|
||||
FlipScanEdgeEvent(tcx, ep, eq, t, ot, newP);
|
||||
EdgeEvent(tcx, ep, eq, &t, p);
|
||||
}
|
||||
}
|
||||
|
||||
Triangle& Sweep::NextFlipTriangle(SweepContext& tcx, int o, Triangle& t, Triangle& ot, Point& p, Point& op) {
|
||||
|
||||
if(o == CCW ) {
|
||||
// ot is not crossing edge after flip
|
||||
int edge_index = ot.EdgeIndex(&p, &op);
|
||||
ot.delaunay_edge[edge_index] = true;
|
||||
Legalize(tcx, ot);
|
||||
ot.ClearDelunayEdges();
|
||||
return t;
|
||||
}
|
||||
|
||||
// t is not crossing edge after flip
|
||||
int edge_index = t.EdgeIndex(&p, &op);
|
||||
t.delaunay_edge[edge_index] = true;
|
||||
Legalize(tcx, t);
|
||||
t.ClearDelunayEdges();
|
||||
return ot;
|
||||
}
|
||||
|
||||
Point& Sweep::NextFlipPoint(Point& ep, Point& eq, Triangle& ot, Point& op ) {
|
||||
|
||||
Orientation o2d = Orient2d(eq, op, ep);
|
||||
if(o2d == CW) {
|
||||
// Right
|
||||
return *ot.PointCCW(op);
|
||||
} else if(o2d == CCW) {
|
||||
// Left
|
||||
return *ot.PointCW(op);
|
||||
} else {
|
||||
//throw new RuntimeException("[Unsupported] Opposing point on constrained edge");
|
||||
assert(0);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void Sweep::FlipScanEdgeEvent(SweepContext& tcx, Point& ep, Point& eq, Triangle& flip_triangle,
|
||||
Triangle& t, Point& p ) {
|
||||
|
||||
Triangle& ot = t.NeighborAcross(p);
|
||||
Point& op = *ot.OppositePoint(t, p);
|
||||
|
||||
if(&t.NeighborAcross(p) == NULL) {
|
||||
// If we want to integrate the fillEdgeEvent do it here
|
||||
// With current implementation we should never get here
|
||||
//throw new RuntimeException( "[BUG:FIXME] FLIP failed due to missing triangle");
|
||||
assert(0);
|
||||
}
|
||||
|
||||
if(InScanArea(eq, *flip_triangle.PointCCW(eq), *flip_triangle.PointCW( eq ), op)) {
|
||||
// flip with new edge op->eq
|
||||
FlipEdgeEvent(tcx, eq, op, ot, op);
|
||||
// TODO: Actually I just figured out that it should be possible to
|
||||
// improve this by getting the next ot and op before the the above
|
||||
// flip and continue the flipScanEdgeEvent here
|
||||
// set new ot and op here and loop back to inScanArea test
|
||||
// also need to set a new flip_triangle first
|
||||
// Turns out at first glance that this is somewhat complicated
|
||||
// so it will have to wait.
|
||||
} else {
|
||||
Point& newP = NextFlipPoint(ep, eq, ot, op);
|
||||
FlipScanEdgeEvent(tcx, ep, eq, flip_triangle, ot, newP);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
118
poly2tri/sweep/sweep.h
Normal file
118
poly2tri/sweep/sweep.h
Normal file
@ -0,0 +1,118 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/**
|
||||
* Sweep-line, Constrained Delauney Triangulation (CDT) See: Domiter, V. and
|
||||
* Zalik, B.(2008)'Sweep-line algorithm for constrained Delaunay triangulation',
|
||||
* International Journal of Geographical Information Science
|
||||
*
|
||||
* "FlipScan" Constrained Edge Algorithm invented by Thomas Åhlén, thahlen@gmail.com
|
||||
*/
|
||||
|
||||
#include <list>
|
||||
|
||||
class SweepContext;
|
||||
struct Node;
|
||||
struct Point;
|
||||
struct Edge;
|
||||
class Triangle;
|
||||
|
||||
class Sweep {
|
||||
|
||||
public:
|
||||
|
||||
void Triangulate(SweepContext& tcx);
|
||||
|
||||
private:
|
||||
|
||||
void SweepPoints(SweepContext& tcx);
|
||||
|
||||
Node& PointEvent(SweepContext& tcx, Point& point);
|
||||
|
||||
void EdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void EdgeEvent(SweepContext& tcx, Point& ep, Point& eq, Triangle* triangle, Point& point);
|
||||
|
||||
Node& NewFrontTriangle(SweepContext& tcx, Point& point, Node& node);
|
||||
|
||||
void Fill(SweepContext& tcx, Node& node);
|
||||
|
||||
bool Legalize(SweepContext& tcx, Triangle& t);
|
||||
|
||||
bool Incircle(Point& pa, Point& pb, Point& pc, Point& pd);
|
||||
|
||||
void RotateTrianglePair(Triangle& t, Point& p, Triangle& ot, Point& op);
|
||||
|
||||
void FillAdvancingFront(SweepContext& tcx, Node& n);
|
||||
|
||||
double HoleAngle(Node& node);
|
||||
|
||||
double BasinAngle(Node& node);
|
||||
|
||||
void FillBasin(SweepContext& tcx, Node& node);
|
||||
|
||||
void FillBasinReq(SweepContext& tcx, Node& node);
|
||||
|
||||
bool IsShallow(SweepContext& tcx, Node& node);
|
||||
|
||||
void FinalizationConvexHull(SweepContext& tcx);
|
||||
|
||||
void TurnAdvancingFrontConvex(SweepContext& tcx, Node& b, Node& c);
|
||||
|
||||
bool IsEdgeSideOfTriangle(Triangle& triangle, Point& ep, Point& eq);
|
||||
|
||||
void FillEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillRightAboveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillRightBelowEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillRightConcaveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillRightConvexEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillLeftAboveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillLeftBelowEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillLeftConcaveEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FillLeftConvexEdgeEvent(SweepContext& tcx, Edge& edge, Node& node);
|
||||
|
||||
void FlipEdgeEvent(SweepContext& tcx, Point& ep, Point& eq, Triangle& t, Point& p);
|
||||
|
||||
Triangle& NextFlipTriangle(SweepContext& tcx, int o, Triangle& t, Triangle& ot, Point& p, Point& op);
|
||||
|
||||
Point& NextFlipPoint(Point& ep, Point& eq, Triangle& ot, Point& op );
|
||||
|
||||
void FlipScanEdgeEvent(SweepContext& tcx, Point& ep, Point& eq, Triangle& flip_triangle, Triangle& t, Point& p);
|
||||
|
||||
};
|
||||
164
poly2tri/sweep/sweep_context.cc
Normal file
164
poly2tri/sweep/sweep_context.cc
Normal file
@ -0,0 +1,164 @@
|
||||
#include "sweep_context.h"
|
||||
|
||||
#include <algorithm>
|
||||
#include <GL/glfw.h>
|
||||
#include "advancing_front.h"
|
||||
|
||||
SweepContext::SweepContext(Point polyline[], const int& point_count) {
|
||||
|
||||
basin = Basin();
|
||||
edge_event = EdgeEvent();
|
||||
|
||||
point_count_ = point_count;
|
||||
points_ = polyline;
|
||||
|
||||
InitTriangulation();
|
||||
InitEdges();
|
||||
|
||||
}
|
||||
|
||||
std::list<Triangle*> SweepContext::GetTriangles() {
|
||||
return tri_list_;
|
||||
}
|
||||
|
||||
void SweepContext::InitTriangulation() {
|
||||
|
||||
double xmax(points_[0].x), xmin(points_[0].x);
|
||||
double ymax(points_[0].y), ymin(points_[0].y);
|
||||
|
||||
// Calculate bounds.
|
||||
for(int i = 0; i < point_count_; i++) {
|
||||
Point p = points_[i];
|
||||
if(p.x > xmax)
|
||||
xmax = p.x;
|
||||
if(p.x < xmin)
|
||||
xmin = p.x;
|
||||
if(p.y > ymax)
|
||||
ymax = p.y;
|
||||
if(p.y < ymin)
|
||||
ymin = p.y;
|
||||
}
|
||||
|
||||
double dx = kAlpha * ( xmax - xmin );
|
||||
double dy = kAlpha * ( ymax - ymin );
|
||||
head_ = new Point(xmax + dx, ymin - dy);
|
||||
tail_ = new Point(xmin - dx, ymin - dy);
|
||||
|
||||
// Sort points along y-axis
|
||||
double init_time = glfwGetTime();
|
||||
std::sort(points_, points_ + point_count_);
|
||||
double dt = glfwGetTime() - init_time;
|
||||
printf("Sort time (secs) = %f\n", dt);
|
||||
|
||||
/*
|
||||
for(int i = 0; i < point_count_; i++) {
|
||||
printf("%i: %f, %f\n", i+1, points_[i].x, points_[i].y);
|
||||
}
|
||||
*/
|
||||
|
||||
}
|
||||
|
||||
void SweepContext::InitEdges() {
|
||||
for(int i = 0; i < point_count_; i++) {
|
||||
int j = i < point_count_ - 1 ? i + 1 : 0;
|
||||
new Edge(points_[i], points_[j]);
|
||||
}
|
||||
}
|
||||
|
||||
Point* SweepContext::GetPoint(const int& index) {
|
||||
return &points_[index];
|
||||
}
|
||||
|
||||
void SweepContext::AddToMap(Triangle* triangle ) {
|
||||
tri_list_.push_back(triangle);
|
||||
}
|
||||
|
||||
Node& SweepContext::LocateNode(Point& point) {
|
||||
// TODO implement search tree
|
||||
return *front_->Locate(point.x);
|
||||
}
|
||||
|
||||
void SweepContext::CreateAdvancingFront() {
|
||||
|
||||
// Initial triangle
|
||||
Triangle* triangle = new Triangle(points_[0], *tail_, *head_);
|
||||
|
||||
tri_list_.push_back(triangle);
|
||||
|
||||
front_ = new AdvancingFront;
|
||||
|
||||
front_->set_head(new Node(*triangle->GetPoint(1)));
|
||||
front_->head()->triangle = triangle;
|
||||
Node* middle = new Node(*triangle->GetPoint(0));
|
||||
middle->triangle = triangle;
|
||||
front_->set_tail(new Node(*triangle->GetPoint(2)));
|
||||
front_->set_search(middle);
|
||||
|
||||
// TODO: More intuitive if head is middles next and not previous?
|
||||
// so swap head and tail
|
||||
front_->head()->next = middle;
|
||||
middle->next = front_->tail();
|
||||
middle->prev = front_->head();
|
||||
front_->tail()->prev = middle;
|
||||
|
||||
}
|
||||
|
||||
void SweepContext::RemoveNode(Node* node) {
|
||||
delete node;
|
||||
}
|
||||
|
||||
void SweepContext::MapTriangleToNodes(Triangle& t) {
|
||||
for(int i=0; i<3; i++) {
|
||||
if(t.GetNeighbor(i) == NULL) {
|
||||
Node* n = front_->LocatePoint(t.PointCW(*t.GetPoint(i)));
|
||||
if(n)
|
||||
n->triangle = &t;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void SweepContext::RemoveFromMap(Triangle* triangle) {
|
||||
tri_list_.remove(triangle);
|
||||
}
|
||||
|
||||
/*
|
||||
void SweepContext::MeshClean(Triangle& triangle) {
|
||||
pointset_.ClearTriangulation();
|
||||
MeshCleanReq(triangle);
|
||||
}
|
||||
|
||||
AFront SweepContext::front_() {
|
||||
return front_;
|
||||
}
|
||||
|
||||
void SweepContext::Clear() {
|
||||
super.clear();
|
||||
tri_list_.Clear();
|
||||
}
|
||||
|
||||
|
||||
Node* SweepContext::LocateNode(Point& point) {
|
||||
// TODO implement tree
|
||||
return front_.Locate(point.x);
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
void SweepContext::MeshCleanReq(Triangle& triangle ) {
|
||||
if(triangle != NULL && !triangle.isInterior()) {
|
||||
triangle.IsInterior(true);
|
||||
pointset_.AddTriangle(triangle);
|
||||
for(int i = 0; i < 3; i++) {
|
||||
if(!triangle.cEdge[i])
|
||||
MeshCleanReq(triangle.neighbors[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
SweepContext::~SweepContext() {
|
||||
delete [] points_;
|
||||
delete head_;
|
||||
delete tail_;
|
||||
delete front_;
|
||||
}
|
||||
158
poly2tri/sweep/sweep_context.h
Normal file
158
poly2tri/sweep/sweep_context.h
Normal file
@ -0,0 +1,158 @@
|
||||
/* Poly2Tri
|
||||
* Copyright (c) 2009-2010, Poly2Tri Contributors
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include <list>
|
||||
|
||||
// Inital triangle factor, seed triangle will extend 30% of
|
||||
// PointSet width to both left and right.
|
||||
const double kAlpha = 0.3;
|
||||
|
||||
struct Point;
|
||||
class Triangle;
|
||||
struct Node;
|
||||
struct Edge;
|
||||
class AdvancingFront;
|
||||
|
||||
|
||||
class SweepContext {
|
||||
|
||||
public:
|
||||
|
||||
// Constructor
|
||||
SweepContext(Point polyline[], const int& point_count);
|
||||
// Destructor
|
||||
~SweepContext();
|
||||
|
||||
//void MeshClean(Triangle& triangle);
|
||||
// Get Advancing Front
|
||||
//AdvancingFront front();
|
||||
|
||||
void set_head(Point* p1);
|
||||
Point* head();
|
||||
|
||||
void set_tail(Point* p1 );
|
||||
Point* tail();
|
||||
|
||||
int point_count();
|
||||
|
||||
Node& LocateNode(Point& point);
|
||||
void RemoveNode(Node* node);
|
||||
|
||||
void CreateAdvancingFront();
|
||||
|
||||
// Try to map a node to all sides of this triangle that don't have a neighbor
|
||||
void MapTriangleToNodes(Triangle& t);
|
||||
|
||||
void AddToMap(Triangle* triangle);
|
||||
|
||||
Point* GetPoint(const int& index);
|
||||
Point* GetPoints();
|
||||
|
||||
void RemoveFromMap(Triangle* triangle);
|
||||
|
||||
AdvancingFront* front();
|
||||
|
||||
std::list<Triangle*> GetTriangles();
|
||||
|
||||
|
||||
struct Basin {
|
||||
|
||||
Node* left_node;
|
||||
Node* bottom_node;
|
||||
Node* right_node;
|
||||
double width;
|
||||
bool left_highest;
|
||||
|
||||
Basin() : left_node(NULL), bottom_node(NULL), right_node(NULL),
|
||||
width(0.0), left_highest(false) {}
|
||||
|
||||
void Clear() {
|
||||
left_node = NULL;
|
||||
bottom_node = NULL;
|
||||
right_node = NULL;
|
||||
width = 0.0;
|
||||
left_highest = false;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
struct EdgeEvent {
|
||||
|
||||
Edge* constrained_edge;
|
||||
bool right;
|
||||
|
||||
EdgeEvent() : constrained_edge(NULL), right(false) {}
|
||||
|
||||
};
|
||||
|
||||
Basin basin;
|
||||
EdgeEvent edge_event;
|
||||
|
||||
private:
|
||||
|
||||
std::list<Triangle*> tri_list_;
|
||||
|
||||
Point* points_;
|
||||
int point_count_;
|
||||
|
||||
// Advancing front
|
||||
AdvancingFront* front_;
|
||||
// head point used with advancing front
|
||||
Point* head_;
|
||||
// tail point used with advancing front
|
||||
Point* tail_;
|
||||
|
||||
//EdgeEvent edgeEvent = new EdgeEvent();
|
||||
|
||||
void InitTriangulation();
|
||||
void InitEdges();
|
||||
|
||||
//void MeshCleanReq(Triangle& triangle )
|
||||
|
||||
/*
|
||||
class EdgeEvent {
|
||||
Edge* constrainedEdge;
|
||||
bool right;
|
||||
};
|
||||
*/
|
||||
|
||||
};
|
||||
|
||||
inline AdvancingFront* SweepContext::front() { return front_; }
|
||||
|
||||
inline int SweepContext::point_count() { return point_count_; }
|
||||
|
||||
inline void SweepContext::set_head(Point* p1) { head_ = p1; }
|
||||
|
||||
inline Point* SweepContext::head() { return head_; }
|
||||
|
||||
inline void SweepContext::set_tail(Point* p1) { tail_ = p1; }
|
||||
|
||||
inline Point* SweepContext::tail() { return tail_; }
|
||||
60
testbed/data/2.dat
Normal file
60
testbed/data/2.dat
Normal file
@ -0,0 +1,60 @@
|
||||
2158.9981,2350.2286
|
||||
2158.9981,3245.4557
|
||||
-1042.9463,3245.4557
|
||||
-1042.9463,2496.1895
|
||||
91.149593,800.20639
|
||||
441.75649,251.73749
|
||||
648.06929,-97.04991
|
||||
765.46219,-332.30851
|
||||
849.31479,-540.20071
|
||||
899.62689,-720.72671
|
||||
916.39869,-873.88651
|
||||
896.13819,-1060.7944
|
||||
835.35969,-1193.3788
|
||||
789.54889,-1239.4959
|
||||
733.15879,-1272.4376
|
||||
666.18939,-1292.204
|
||||
588.64059,-1298.7951
|
||||
511.08979,-1291.4964
|
||||
444.11959,-1269.6012
|
||||
387.73029,-1233.1107
|
||||
341.92169,-1182.0263
|
||||
306.46619,-1109.2461
|
||||
281.14119,-1007.6808
|
||||
260.88259,-718.19491
|
||||
260.88259,-218.68401
|
||||
-1042.9463,-218.68401
|
||||
-1042.9463,-410.05511
|
||||
-1030.3404,-804.55201
|
||||
-992.52205,-1105.8022
|
||||
-958.08057,-1232.6032
|
||||
-905.18018,-1358.3923
|
||||
-833.82067,-1483.1695
|
||||
-744.00213,-1606.9348
|
||||
-637.5262,-1722.6871
|
||||
-516.1928,-1823.4397
|
||||
-380.00205,-1909.1927
|
||||
-228.95374,-1979.9461
|
||||
-62.599167,-2035.2866
|
||||
119.51329,-2074.8167
|
||||
317.38399,-2098.5364
|
||||
531.01279,-2106.4456
|
||||
938.57049,-2082.2155
|
||||
1122.512,-2051.9328
|
||||
1293.2285,-2009.5383
|
||||
1450.7202,-1955.0316
|
||||
1594.987,-1888.4129
|
||||
1726.0289,-1809.6817
|
||||
1843.846,-1718.8382
|
||||
2038.4505,-1512.159
|
||||
2177.4543,-1279.7356
|
||||
2260.8578,-1021.5681
|
||||
2288.6606,-737.65631
|
||||
2273.0151,-508.98211
|
||||
2226.0792,-273.82221
|
||||
2147.8538,-32.17651
|
||||
2038.3398,215.95519
|
||||
1852.2859,537.88159
|
||||
1544.4495,1000.9025
|
||||
1114.8304,1605.018
|
||||
563.42839,2350.2286
|
||||
275
testbed/data/bird.dat
Normal file
275
testbed/data/bird.dat
Normal file
@ -0,0 +1,275 @@
|
||||
4.57998 4.03402
|
||||
4.06435 4.06435
|
||||
3.51839 4.21601
|
||||
3.09376 4.42832
|
||||
2.60846 4.57998
|
||||
2.09284 4.7013
|
||||
1.51655 4.82263
|
||||
0.909929 4.94395
|
||||
0.242648 5.06527
|
||||
-0.30331 5.0956
|
||||
-1.15258 5.12594
|
||||
-1.72887 5.12594
|
||||
-2.48714 5.12594
|
||||
-2.85111 5.03494
|
||||
-3.36674 5.30792
|
||||
-3.70038 5.52024
|
||||
-4.15534 5.9752
|
||||
-4.7013 6.27851
|
||||
-5.0956 6.61215
|
||||
-5.73255 6.67281
|
||||
-6.55149 6.73348
|
||||
-6.88513 6.61215
|
||||
-7.46142 6.36951
|
||||
-7.88605 6.18752
|
||||
-8.25003 5.91454
|
||||
-8.64433 5.61123
|
||||
-8.88698 5.30792
|
||||
-9.06896 5.00461
|
||||
-9.25095 4.88329
|
||||
-9.94856 4.73163
|
||||
-10.6462 4.64064
|
||||
-11.1011 4.54965
|
||||
-11.3741 4.42832
|
||||
-11.5561 4.21601
|
||||
-11.0101 4.21601
|
||||
-10.1305 3.94303
|
||||
-9.61492 3.73071
|
||||
-9.15996 3.4274
|
||||
-8.73532 3.00277
|
||||
-8.34102 2.6388
|
||||
-7.97705 2.36582
|
||||
-7.61308 2.03218
|
||||
-7.18844 1.45589
|
||||
-6.79414 1.12225
|
||||
-6.64248 0.788605
|
||||
-6.36951 0.242648
|
||||
-6.24818 -0.212317
|
||||
-6.00553 -0.515627
|
||||
-5.73255 -0.818936
|
||||
-5.24726 -1.2739
|
||||
-4.7923 -1.60754
|
||||
-4.42832 -2.00184
|
||||
-3.67005 -2.21416
|
||||
-3.18475 -2.39615
|
||||
-2.5478 -2.69946
|
||||
-1.91085 -2.79045
|
||||
-1.06158 -2.88144
|
||||
-0.333641 -2.88144
|
||||
0.242648 -2.85111
|
||||
0.94026 -2.82078
|
||||
1.2739 -2.85111
|
||||
1.42556 -3.0331
|
||||
1.42556 -3.30608
|
||||
1.33456 -3.57905
|
||||
1.15258 -4.00369
|
||||
1.03125 -4.57998
|
||||
0.849267 -5.15627
|
||||
0.63695 -5.5809
|
||||
0.30331 -5.91454
|
||||
0.060662 -6.15719
|
||||
-0.333641 -6.27851
|
||||
-0.697612 -6.27851
|
||||
-1.15258 -6.36951
|
||||
-1.57721 -6.39984
|
||||
-2.09284 -6.52116
|
||||
-2.36582 -6.79414
|
||||
-2.48714 -7.06712
|
||||
-2.18383 -6.97612
|
||||
-1.85019 -6.79414
|
||||
-1.42556 -6.76381
|
||||
-1.15258 -6.79414
|
||||
-1.36489 -6.88513
|
||||
-1.69853 -6.97612
|
||||
-1.97151 -7.12778
|
||||
-2.12317 -7.37043
|
||||
-2.27482 -7.64341
|
||||
-2.39615 -7.91639
|
||||
-2.36582 -8.21969
|
||||
-2.03218 -7.85572
|
||||
-1.81986 -7.7344
|
||||
-1.57721 -7.67374
|
||||
-1.36489 -7.49175
|
||||
-1.21324 -7.40076
|
||||
-0.849267 -7.2491
|
||||
-0.60662 -7.12778
|
||||
-0.242648 -6.91546
|
||||
0.030331 -6.70315
|
||||
0.363972 -6.4605
|
||||
0.242648 -6.61215
|
||||
0.152837 -6.72007
|
||||
-0.092855 -6.88818
|
||||
-0.506653 -7.15974
|
||||
-0.765276 -7.31491
|
||||
-1.01097 -7.41836
|
||||
-1.16614 -7.5606
|
||||
-1.32132 -7.71577
|
||||
-1.45063 -7.81922
|
||||
-1.50235 -8.06492
|
||||
-1.50235 -8.29768
|
||||
-1.46356 -8.53044
|
||||
-1.38597 -8.29768
|
||||
-1.28252 -8.05199
|
||||
-1.14028 -7.87095
|
||||
-0.985106 -7.84509
|
||||
-0.817001 -7.84509
|
||||
-0.623033 -7.70284
|
||||
-0.390272 -7.52181
|
||||
-0.105787 -7.31491
|
||||
0.178699 -7.06922
|
||||
0.489047 -6.84939
|
||||
0.670083 -6.66835
|
||||
0.928707 -6.47438
|
||||
1.16147 -6.33214
|
||||
1.47182 -6.13817
|
||||
1.82096 -5.91834
|
||||
2.04079 -5.84076
|
||||
2.15717 -5.71144
|
||||
2.18303 -5.45282
|
||||
2.06665 -5.28472
|
||||
1.87268 -5.3623
|
||||
1.49768 -5.63386
|
||||
1.22612 -5.81489
|
||||
1.03216 -5.91834
|
||||
0.876982 -5.95714
|
||||
0.954569 -5.80196
|
||||
1.00629 -5.60799
|
||||
1.16147 -5.29765
|
||||
1.3425 -4.9873
|
||||
1.45888 -4.65109
|
||||
1.47182 -4.4054
|
||||
1.73044 -3.95281
|
||||
1.84682 -3.6166
|
||||
1.98906 -3.30625
|
||||
2.14424 -2.95711
|
||||
2.26062 -2.75021
|
||||
2.42872 -2.59503
|
||||
2.63562 -2.50452
|
||||
2.98476 -2.51745
|
||||
3.12701 -2.71141
|
||||
3.06235 -3.09935
|
||||
2.9589 -3.4097
|
||||
2.86838 -3.75884
|
||||
2.79079 -4.12091
|
||||
2.70028 -4.43126
|
||||
2.55803 -4.75454
|
||||
2.48045 -5.03902
|
||||
2.3382 -5.37523
|
||||
2.29941 -5.59506
|
||||
2.23475 -5.90541
|
||||
2.11837 -6.21576
|
||||
1.7951 -6.65542
|
||||
1.39423 -7.05628
|
||||
1.09681 -7.26318
|
||||
0.838188 -7.37956
|
||||
0.41146 -7.49594
|
||||
-0.002337 -7.62526
|
||||
-0.416135 -7.7675
|
||||
-0.687689 -8.05199
|
||||
-0.907519 -8.40113
|
||||
-0.70062 -8.19423
|
||||
-0.312685 -8.05199
|
||||
-0.015268 -7.89681
|
||||
0.217493 -7.89681
|
||||
0.243355 -7.90974
|
||||
0.023525 -8.1425
|
||||
-0.157511 -8.25888
|
||||
-0.403203 -8.43992
|
||||
-0.648896 -8.75027
|
||||
-0.778207 -8.90544
|
||||
-0.881657 -9.18993
|
||||
-0.80407 -9.60372
|
||||
-0.597171 -9.177
|
||||
-0.14458 -8.9701
|
||||
0.269217 -8.62096
|
||||
0.695946 -8.28475
|
||||
1.13561 -8.00026
|
||||
1.52354 -7.62526
|
||||
1.82096 -7.26318
|
||||
1.95027 -7.09508
|
||||
1.9632 -7.15974
|
||||
1.66578 -7.58646
|
||||
1.45888 -7.84509
|
||||
1.13561 -8.20716
|
||||
0.760601 -8.65975
|
||||
0.450253 -8.99596
|
||||
0.269217 -9.28045
|
||||
0.126974 -9.65545
|
||||
0.19163 -10.2761
|
||||
0.333873 -9.84942
|
||||
0.63129 -9.68131
|
||||
0.980431 -9.26751
|
||||
1.26492 -8.72441
|
||||
1.60113 -8.31061
|
||||
1.98906 -7.7675
|
||||
2.36407 -7.34077
|
||||
2.79079 -7.00456
|
||||
3.13994 -6.7718
|
||||
3.68304 -6.46145
|
||||
4.14857 -6.33214
|
||||
4.7434 -6.09938
|
||||
5.19599 -6.13817
|
||||
4.85978 -5.87955
|
||||
4.29081 -5.76317
|
||||
3.77356 -5.81489
|
||||
3.34683 -6.07352
|
||||
2.77786 -6.47438
|
||||
2.41579 -6.60369
|
||||
2.41579 -6.28042
|
||||
2.59683 -5.84076
|
||||
2.79079 -5.42696
|
||||
2.99769 -4.90971
|
||||
3.25632 -4.30195
|
||||
3.50201 -3.52608
|
||||
3.83822 -2.63383
|
||||
4.07098 -2.40107
|
||||
4.39426 -2.28469
|
||||
4.79512 -2.23296
|
||||
4.54943 -2.02606
|
||||
4.49771 -1.6252
|
||||
4.54943 -1.50882
|
||||
4.91151 -1.50882
|
||||
5.54513 -1.45709
|
||||
6.12704 -1.39244
|
||||
6.85118 -1.32778
|
||||
7.44601 -1.14674
|
||||
7.85981 -0.78467
|
||||
7.79516 -0.409667
|
||||
7.49774 -0.151043
|
||||
7.84688 0.042924
|
||||
8.23481 0.314479
|
||||
8.64861 0.702414
|
||||
8.70034 1.09035
|
||||
8.41585 1.42656
|
||||
8.11843 1.62053
|
||||
8.3512 2.06019
|
||||
8.53223 2.38347
|
||||
8.67447 2.74554
|
||||
8.66154 3.22399
|
||||
8.80379 3.87055
|
||||
8.90724 4.36193
|
||||
9.1012 4.85332
|
||||
9.43741 5.40936
|
||||
9.90293 6.04298
|
||||
10.3167 6.58609
|
||||
10.7047 7.3749
|
||||
10.9374 7.96973
|
||||
11.1573 8.40939
|
||||
11.1573 8.84905
|
||||
10.9374 9.05595
|
||||
10.6659 9.28871
|
||||
10.3426 9.37922
|
||||
9.99345 9.34043
|
||||
9.63138 8.97836
|
||||
9.20465 8.48697
|
||||
8.86844 8.1249
|
||||
8.50637 7.72404
|
||||
8.17016 7.28438
|
||||
7.74343 6.88351
|
||||
7.43308 6.5473
|
||||
7.16153 6.1723
|
||||
6.70894 5.71971
|
||||
6.20462 5.25418
|
||||
5.72617 4.80159
|
||||
5.13134 4.41366
|
||||
4.87271 4.16797
|
||||
7
testbed/data/custom.dat
Normal file
7
testbed/data/custom.dat
Normal file
@ -0,0 +1,7 @@
|
||||
0 130
|
||||
-270 0
|
||||
130 -40
|
||||
10 -60
|
||||
-10 -20
|
||||
100 30
|
||||
40 -40
|
||||
200
testbed/data/debug.dat
Normal file
200
testbed/data/debug.dat
Normal file
@ -0,0 +1,200 @@
|
||||
1.2277408 0.0
|
||||
1.3243141 0.041618247
|
||||
1.0635862 0.06691518
|
||||
0.952708 0.09005742
|
||||
0.9624486 0.12158553
|
||||
1.3459457 0.21317686
|
||||
0.94439876 0.1801537
|
||||
0.58555007 0.13088594
|
||||
0.5811499 0.14921393
|
||||
0.82454175 0.23955151
|
||||
0.62284756 0.20237544
|
||||
0.56452847 0.20324275
|
||||
0.5578659 0.22087473
|
||||
0.6222525 0.2692727
|
||||
0.5428962 0.25546756
|
||||
0.6560448 0.33427152
|
||||
0.525784 0.28905222
|
||||
0.71199375 0.42107195
|
||||
0.8918749 0.56600106
|
||||
0.93826324 0.63764304
|
||||
0.5041431 0.36628145
|
||||
0.74085724 0.57466775
|
||||
0.55901116 0.46245426
|
||||
0.45006666 0.3967871
|
||||
0.43738118 0.41072828
|
||||
0.42426407 0.42426407
|
||||
0.41072828 0.43738118
|
||||
0.3967871 0.45006666
|
||||
0.41002733 0.4956379
|
||||
0.7536917 0.9716534
|
||||
1.0196112 1.4033744
|
||||
0.66767913 0.98246
|
||||
0.7202045 1.1348608
|
||||
0.44231245 0.7479095
|
||||
0.28905222 0.525784
|
||||
0.2723943 0.5346039
|
||||
0.5011288 1.0649529
|
||||
0.27308202 0.6310553
|
||||
0.22087473 0.5578659
|
||||
0.20460863 0.56832236
|
||||
0.3397839 1.0457473
|
||||
0.26354295 0.9071208
|
||||
0.2884009 1.1232473
|
||||
0.15593462 0.69761133
|
||||
0.16937841 0.88791275
|
||||
0.21818724 1.37758
|
||||
0.1523747 1.20617
|
||||
0.11806885 1.249038
|
||||
0.06135568 0.97522056
|
||||
0.018846456 0.5997039
|
||||
6.8178847E-17 1.113445
|
||||
-0.028901286 0.91965383
|
||||
-0.06209223 0.98692775
|
||||
-0.05646499 0.5973372
|
||||
-0.10701424 0.84710497
|
||||
-0.09386068 0.592613
|
||||
-0.1636339 0.8577989
|
||||
-0.29984477 1.3414284
|
||||
-0.45487383 1.7716166
|
||||
-0.6387838 2.1987083
|
||||
-0.6129905 1.8865908
|
||||
-0.8446652 2.3461478
|
||||
-0.9281012 2.344116
|
||||
-1.0037318 2.3194876
|
||||
-1.0196298 2.1668236
|
||||
-0.8902802 1.7472732
|
||||
-1.2330354 2.242883
|
||||
-1.4297054 2.4174998
|
||||
-1.6074804 2.5329838
|
||||
-1.4688258 2.1613116
|
||||
-1.7633557 2.427051
|
||||
-1.6571896 2.136436
|
||||
-1.912272 2.3115396
|
||||
-1.6086806 1.82469
|
||||
-1.6045313 1.7086523
|
||||
-2.0598311 2.0598311
|
||||
-1.8296968 1.7181997
|
||||
-2.2503333 1.9839356
|
||||
-2.1353924 1.7665502
|
||||
-2.370465 1.8387212
|
||||
-2.427051 1.7633557
|
||||
-2.4812417 1.6862501
|
||||
-2.5329838 1.6074804
|
||||
-2.5773842 1.5242608
|
||||
-2.62892 1.445261
|
||||
-2.6730196 1.3619715
|
||||
-2.714481 1.2773379
|
||||
-2.753264 1.1914437
|
||||
-2.7893295 1.1043737
|
||||
-2.8226423 1.0162138
|
||||
-2.8531694 0.927051
|
||||
-2.5261154 0.73390436
|
||||
-2.6257684 0.6741827
|
||||
-2.9277503 0.65442973
|
||||
-2.8118498 0.53638905
|
||||
-2.963065 0.4693034
|
||||
-2.976344 0.3759997
|
||||
-2.617039 0.24738303
|
||||
-2.99408 0.18837155
|
||||
-2.860681 0.08990052
|
||||
-3.0 3.6739403E-16
|
||||
-2.6968896 -0.08475317
|
||||
-2.99408 -0.18837155
|
||||
-2.431072 -0.22980396
|
||||
-2.4993353 -0.31573948
|
||||
-2.3772683 -0.3765223
|
||||
-2.523671 -0.48141596
|
||||
-2.4523084 -0.54815584
|
||||
-1.9428126 -0.49882948
|
||||
-1.980212 -0.57530475
|
||||
-1.6508379 -0.53638977
|
||||
-1.7593161 -0.63339275
|
||||
-1.1899233 -0.47112396
|
||||
-0.8138197 -0.35217124
|
||||
-0.5630522 -0.26495224
|
||||
-0.5346039 -0.2723943
|
||||
-0.878033 -0.4827027
|
||||
-0.85542375 -0.5058962
|
||||
-1.2059882 -0.76534337
|
||||
-0.97923774 -0.66548926
|
||||
-1.0108875 -0.7344528
|
||||
-0.7830176 -0.6073707
|
||||
-0.90356225 -0.74749166
|
||||
-1.0288435 -0.90704757
|
||||
-1.1261301 -1.0575066
|
||||
-0.9001703 -0.9001703
|
||||
-0.8477716 -0.902785
|
||||
-0.5851195 -0.66368777
|
||||
-0.47532755 -0.5745723
|
||||
-0.6310177 -0.8135031
|
||||
-0.40265256 -0.5542037
|
||||
-0.33725002 -0.49624833
|
||||
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|
||||
-0.46425027 -0.7850044
|
||||
-0.38156003 -0.69405514
|
||||
-0.2723943 -0.5346039
|
||||
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|
||||
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|
||||
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|
||||
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|
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|
||||
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|
||||
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|
||||
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|
||||
-0.081517614 -0.64527833
|
||||
-0.07004014 -0.7409472
|
||||
-0.05557717 -0.88337386
|
||||
-0.025127873 -0.7995819
|
||||
-1.1021821E-16 -0.6
|
||||
0.029305225 -0.9325074
|
||||
0.05083992 -0.8080774
|
||||
0.10585039 -1.1197802
|
||||
0.18259653 -1.4454004
|
||||
0.21030101 -1.3277884
|
||||
0.17551 -0.9200556
|
||||
0.17963327 -0.8036331
|
||||
0.14921393 -0.5811499
|
||||
0.26661414 -0.9176919
|
||||
0.1854102 -0.5706339
|
||||
0.24760589 -0.6877518
|
||||
0.251998 -0.6364744
|
||||
0.23828873 -0.5506528
|
||||
0.4822611 -1.024857
|
||||
0.479923 -0.9419019
|
||||
0.34421936 -0.62613267
|
||||
0.55215293 -0.9336396
|
||||
0.70164776 -1.1056199
|
||||
0.9243659 -1.3601631
|
||||
1.1842307 -1.6299537
|
||||
1.4756334 -1.9023752
|
||||
1.6572317 -2.003249
|
||||
1.669321 -1.893473
|
||||
1.8840985 -2.0063612
|
||||
2.1213202 -2.1213202
|
||||
2.1869059 -2.0536413
|
||||
2.2503333 -1.9839356
|
||||
2.3115396 -1.912272
|
||||
2.2131321 -1.7166812
|
||||
2.3906639 -1.7369189
|
||||
2.0770426 -1.4115567
|
||||
2.2302797 -1.4153785
|
||||
2.4940982 -1.4750056
|
||||
2.62892 -1.445261
|
||||
2.23299 -1.1377653
|
||||
2.5385184 -1.1945361
|
||||
2.4313858 -1.0521545
|
||||
2.686942 -1.0638356
|
||||
2.8226423 -1.0162138
|
||||
2.6503394 -0.86114746
|
||||
2.6646125 -0.77414155
|
||||
2.1942327 -0.56338316
|
||||
1.7811928 -0.39814374
|
||||
1.9936028 -0.38030007
|
||||
1.5980223 -0.2531019
|
||||
1.77933 -0.22478165
|
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1.192731 -0.112746276
|
||||
1.358207 -0.08545114
|
||||
1.7209803 -0.054083984
|
||||
10000
testbed/data/debug2.dat
Normal file
10000
testbed/data/debug2.dat
Normal file
File diff suppressed because it is too large
Load Diff
10
testbed/data/diamond.dat
Normal file
10
testbed/data/diamond.dat
Normal file
@ -0,0 +1,10 @@
|
||||
0.0 0.0
|
||||
2.0 1.0
|
||||
4.0 2.0
|
||||
6.0 3.0
|
||||
8.0 4.0
|
||||
1.0 5.0
|
||||
-8.0 4.0
|
||||
-6.0 3.0
|
||||
-4.0 2.0
|
||||
-2.0 1.0
|
||||
94
testbed/data/dude.dat
Normal file
94
testbed/data/dude.dat
Normal file
@ -0,0 +1,94 @@
|
||||
280.35714 648.79075
|
||||
286.78571 662.8979
|
||||
263.28607 661.17871
|
||||
262.31092 671.41548
|
||||
250.53571 677.00504
|
||||
250.53571 683.43361
|
||||
256.42857 685.21933
|
||||
297.14286 669.50504
|
||||
289.28571 649.50504
|
||||
285 631.6479
|
||||
285 608.79075
|
||||
292.85714 585.21932
|
||||
306.42857 563.79075
|
||||
323.57143 548.79075
|
||||
339.28571 545.21932
|
||||
357.85714 547.36218
|
||||
375 550.21932
|
||||
391.42857 568.07647
|
||||
404.28571 588.79075
|
||||
413.57143 612.36218
|
||||
417.14286 628.07647
|
||||
438.57143 619.1479
|
||||
438.03572 618.96932
|
||||
437.5 609.50504
|
||||
426.96429 609.86218
|
||||
424.64286 615.57647
|
||||
419.82143 615.04075
|
||||
420.35714 605.04075
|
||||
428.39286 598.43361
|
||||
437.85714 599.68361
|
||||
443.57143 613.79075
|
||||
450.71429 610.21933
|
||||
431.42857 575.21932
|
||||
405.71429 550.21932
|
||||
372.85714 534.50504
|
||||
349.28571 531.6479
|
||||
346.42857 521.6479
|
||||
346.42857 511.6479
|
||||
350.71429 496.6479
|
||||
367.85714 476.6479
|
||||
377.14286 460.93361
|
||||
385.71429 445.21932
|
||||
388.57143 404.50504
|
||||
360 352.36218
|
||||
337.14286 325.93361
|
||||
330.71429 334.50504
|
||||
347.14286 354.50504
|
||||
337.85714 370.21932
|
||||
333.57143 359.50504
|
||||
319.28571 353.07647
|
||||
312.85714 366.6479
|
||||
350.71429 387.36218
|
||||
368.57143 408.07647
|
||||
375.71429 431.6479
|
||||
372.14286 454.50504
|
||||
366.42857 462.36218
|
||||
352.85714 462.36218
|
||||
336.42857 456.6479
|
||||
332.85714 438.79075
|
||||
338.57143 423.79075
|
||||
338.57143 411.6479
|
||||
327.85714 405.93361
|
||||
320.71429 407.36218
|
||||
315.71429 423.07647
|
||||
314.28571 440.21932
|
||||
325 447.71932
|
||||
324.82143 460.93361
|
||||
317.85714 470.57647
|
||||
304.28571 483.79075
|
||||
287.14286 491.29075
|
||||
263.03571 498.61218
|
||||
251.60714 503.07647
|
||||
251.25 533.61218
|
||||
260.71429 533.61218
|
||||
272.85714 528.43361
|
||||
286.07143 518.61218
|
||||
297.32143 508.25504
|
||||
297.85714 507.36218
|
||||
298.39286 506.46932
|
||||
307.14286 496.6479
|
||||
312.67857 491.6479
|
||||
317.32143 503.07647
|
||||
322.5 514.1479
|
||||
325.53571 521.11218
|
||||
327.14286 525.75504
|
||||
326.96429 535.04075
|
||||
311.78571 540.04075
|
||||
291.07143 552.71932
|
||||
274.82143 568.43361
|
||||
259.10714 592.8979
|
||||
254.28571 604.50504
|
||||
251.07143 621.11218
|
||||
250.53571 649.1479
|
||||
268.1955 654.36208
|
||||
100
testbed/data/funny.dat
Normal file
100
testbed/data/funny.dat
Normal file
@ -0,0 +1,100 @@
|
||||
100.317505 0.0
|
||||
146.29202 9.203914
|
||||
129.52948 16.363379
|
||||
95.36635 18.192104
|
||||
88.769775 22.792204
|
||||
102.68762 33.36523
|
||||
142.4203 56.388184
|
||||
132.23712 62.22607
|
||||
134.04555 73.69216
|
||||
121.24752 76.946014
|
||||
140.18803 101.85256
|
||||
124.024445 102.601944
|
||||
119.727 112.43114
|
||||
144.82764 154.22577
|
||||
155.76044 188.28203
|
||||
146.94632 202.25424
|
||||
133.9567 211.08199
|
||||
120.438416 219.07668
|
||||
103.53854 220.03061
|
||||
90.72225 229.13826
|
||||
77.25425 237.76413
|
||||
54.851055 213.63075
|
||||
46.84533 245.57181
|
||||
31.33331 248.02867
|
||||
15.69763 249.50668
|
||||
1.5308084E-14 250.0
|
||||
-13.490268 214.42166
|
||||
-29.863472 236.39372
|
||||
-44.794296 234.81993
|
||||
-50.172047 195.40721
|
||||
-69.351425 213.44174
|
||||
-75.72414 191.25734
|
||||
-96.03964 204.09464
|
||||
-120.438416 219.07668
|
||||
-127.11785 200.30568
|
||||
-119.31813 164.22733
|
||||
-130.35721 157.57478
|
||||
-112.00853 119.27697
|
||||
-142.68515 133.99026
|
||||
-117.65654 97.333954
|
||||
-125.62218 91.26986
|
||||
-114.24053 72.499245
|
||||
-160.95981 88.4884
|
||||
-138.49583 65.171196
|
||||
-102.99021 40.776707
|
||||
-141.48434 45.97105
|
||||
-97.90232 25.137043
|
||||
-116.9116 22.30208
|
||||
-145.58727 18.391949
|
||||
-183.83247 11.565759
|
||||
-190.12851 2.3284026E-14
|
||||
-157.68095 -9.9204445
|
||||
-186.18002 -23.520008
|
||||
-160.72182 -30.659325
|
||||
-143.63857 -36.880116
|
||||
-143.12222 -46.50323
|
||||
-98.59685 -39.037254
|
||||
-86.89141 -40.887993
|
||||
-83.81993 -46.0804
|
||||
-42.216396 -26.79134
|
||||
-40.45085 -29.389263
|
||||
-38.52566 -31.871199
|
||||
-46.53258 -43.697002
|
||||
-34.227356 -36.448433
|
||||
-38.017994 -45.95586
|
||||
-29.389263 -40.45085
|
||||
-26.79134 -42.216396
|
||||
-31.430187 -57.1713
|
||||
-22.040213 -46.837833
|
||||
-27.75829 -70.109436
|
||||
-26.90105 -82.79292
|
||||
-13.713537 -53.4107
|
||||
-10.41509 -54.59781
|
||||
-6.2666616 -49.605736
|
||||
-3.139526 -49.901337
|
||||
-9.184851E-15 -50.0
|
||||
3.5057213 -55.721844
|
||||
6.2666616 -49.605736
|
||||
14.274147 -74.8277
|
||||
19.75647 -76.946365
|
||||
24.69724 -76.01029
|
||||
24.807446 -62.656456
|
||||
28.282286 -60.102917
|
||||
37.102608 -67.489395
|
||||
51.878616 -81.74762
|
||||
46.092445 -63.440807
|
||||
34.334026 -41.502712
|
||||
34.227356 -36.448433
|
||||
43.65427 -40.99409
|
||||
38.52566 -31.871199
|
||||
40.45085 -29.389263
|
||||
42.216396 -26.79134
|
||||
52.668476 -28.95474
|
||||
86.38597 -40.650154
|
||||
126.91717 -50.25006
|
||||
83.21832 -27.039272
|
||||
109.77473 -28.185358
|
||||
105.45997 -20.117565
|
||||
119.66038 -15.116621
|
||||
74.30321 -4.674762
|
||||
1036
testbed/data/nazca_heron.dat
Normal file
1036
testbed/data/nazca_heron.dat
Normal file
File diff suppressed because it is too large
Load Diff
1204
testbed/data/nazca_monkey.dat
Normal file
1204
testbed/data/nazca_monkey.dat
Normal file
File diff suppressed because it is too large
Load Diff
82
testbed/data/polygon.dae
Normal file
82
testbed/data/polygon.dae
Normal file
@ -0,0 +1,82 @@
|
||||
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
|
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||||
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|
||||
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|
||||
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|
||||
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|
||||
<up_axis>Z_UP</up_axis>
|
||||
</asset>
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||||
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|
||||
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|
||||
<node name="SketchUp">
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||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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|
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||||
-75.22729 57.11985
|
||||
-73.87579 -50.62886
|
||||
-75.22729 57.11985
|
||||
-70.57319 44.86685
|
||||
-73.87579 -50.62886
|
||||
-70.57319 44.86685
|
||||
-64.26037 -45.54158
|
||||
-64.26037 -45.54158
|
||||
-70.57319 44.86685
|
||||
-69.61521 31.86262
|
||||
-64.26037 -45.54158
|
||||
-69.61521 31.86262
|
||||
-64.96236 19.68153
|
||||
-64.26037 -45.54158
|
||||
-64.96236 19.68153
|
||||
-57.00677 9.350201
|
||||
-64.26037 -45.54158
|
||||
-57.00677 9.350201
|
||||
-56.86785 -37.56115
|
||||
-56.86785 -37.56115
|
||||
-57.00677 9.350201
|
||||
-51.7342 -16.73615
|
||||
-51.7342 -16.73615
|
||||
-57.00677 9.350201
|
||||
-46.41893 1.739326
|
||||
-56.86785 -37.56115
|
||||
-51.7342 -16.73615
|
||||
-52.52979 -27.58529
|
||||
-51.7342 -16.73615
|
||||
-46.41893 1.739326
|
||||
-43.24859 -39.15101
|
||||
-43.24859 -39.15101
|
||||
-46.41893 1.739326
|
||||
-34.09116 -2.50966
|
||||
-43.24859 -39.15101
|
||||
-34.09116 -2.50966
|
||||
-28.50562 -58.04747
|
||||
-28.50562 -58.04747
|
||||
-34.09116 -2.50966
|
||||
-21.06243 -3.038659
|
||||
-28.50562 -58.04747
|
||||
-21.06243 -3.038659
|
||||
-8.827904 -71.73027
|
||||
-8.827904 -71.73027
|
||||
-21.06243 -3.038659
|
||||
-8.430764 0.1969107
|
||||
-8.827904 -71.73027
|
||||
-8.430764 0.1969107
|
||||
14.01921 -78.97189
|
||||
14.01921 -78.97189
|
||||
-8.430764 0.1969107
|
||||
2.739249 6.924362
|
||||
14.01921 -78.97189
|
||||
2.739249 6.924362
|
||||
11.50623 16.57672
|
||||
14.01921 -78.97189
|
||||
11.50623 16.57672
|
||||
17.1313 28.34049
|
||||
14.01921 -78.97189
|
||||
17.1313 28.34049
|
||||
37.98603 -79.12265
|
||||
37.98603 -79.12265
|
||||
17.1313 28.34049
|
||||
19.14039 41.22425
|
||||
37.98603 -79.12265
|
||||
19.14039 41.22425
|
||||
23.07544 73.93119
|
||||
37.98603 -79.12265
|
||||
23.07544 73.93119
|
||||
29.36394 74.9028
|
||||
37.98603 -79.12265
|
||||
29.36394 74.9028
|
||||
35.52051 76.51087
|
||||
37.98603 -79.12265
|
||||
35.52051 76.51087
|
||||
41.48091 78.73864
|
||||
37.98603 -79.12265
|
||||
41.48091 78.73864
|
||||
60.92244 -72.16905
|
||||
60.92244 -72.16905
|
||||
41.48091 78.73864
|
||||
47.18293 81.56284
|
||||
60.92244 -72.16905
|
||||
47.18293 81.56284
|
||||
52.56709 84.95402
|
||||
60.92244 -72.16905
|
||||
52.56709 84.95402
|
||||
57.67648 89.0556
|
||||
60.92244 -72.16905
|
||||
57.67648 89.0556
|
||||
63.67333 91.69501
|
||||
60.92244 -72.16905
|
||||
63.67333 91.69501
|
||||
80.77074 -58.7349
|
||||
80.77074 -58.7349
|
||||
63.67333 91.69501
|
||||
70.14898 92.69238
|
||||
80.77074 -58.7349
|
||||
70.14898 92.69238
|
||||
76.66211 91.97975
|
||||
80.77074 -58.7349
|
||||
76.66211 91.97975
|
||||
82.76887 89.60568
|
||||
80.77074 -58.7349
|
||||
82.76887 89.60568
|
||||
95.75028 -40.02542
|
||||
95.75028 -40.02542
|
||||
82.76887 89.60568
|
||||
88.83104 50.24595
|
||||
88.83104 50.24595
|
||||
82.76887 89.60568
|
||||
88.0531 85.73196
|
||||
95.75028 -40.02542
|
||||
88.83104 50.24595
|
||||
100.8951 29.53631
|
||||
95.75028 -40.02542
|
||||
100.8951 29.53631
|
||||
104.5172 -17.71909
|
||||
104.5172 -17.71909
|
||||
100.8951 29.53631
|
||||
106.285 6.182927
|
||||
-38.45807 33.09269
|
||||
-38.28861 40.08139
|
||||
-37.78529 35.38022
|
||||
-38.28861 40.08139
|
||||
-38.45807 33.09269
|
||||
-38.42946 47.11159
|
||||
-37.78529 35.38022
|
||||
-38.28861 40.08139
|
||||
-37.72749 37.76394
|
||||
|
||||
10
testbed/data/star.dat
Normal file
10
testbed/data/star.dat
Normal file
@ -0,0 +1,10 @@
|
||||
350 75
|
||||
379 161
|
||||
469 161
|
||||
397 215
|
||||
423 301
|
||||
350 250
|
||||
277 301
|
||||
303 215
|
||||
231 161
|
||||
321 161
|
||||
16
testbed/data/strange.dat
Normal file
16
testbed/data/strange.dat
Normal file
@ -0,0 +1,16 @@
|
||||
400 472
|
||||
500 392
|
||||
520 272
|
||||
460 232
|
||||
580 212
|
||||
480 152
|
||||
360 172
|
||||
360 52
|
||||
300 112
|
||||
200 32
|
||||
120 92
|
||||
200 72
|
||||
340 272
|
||||
208 212
|
||||
180 352
|
||||
300 312
|
||||
55
testbed/data/tank.dat
Normal file
55
testbed/data/tank.dat
Normal file
@ -0,0 +1,55 @@
|
||||
-37.317758 260.65677
|
||||
-37.317758 317.44301
|
||||
-34.741139 339.73612
|
||||
-27.330761 354.21222
|
||||
59.525828 406.25724
|
||||
444.17643 404.87856
|
||||
538.9604 368.68832
|
||||
555.15984 355.59089
|
||||
558.95121 344.90615
|
||||
559.64054 325.94936
|
||||
568.19908 315.85885
|
||||
572.586 322.56108
|
||||
584.65003 322.31737
|
||||
568.80837 296.11771
|
||||
557.59736 289.78104
|
||||
539.56224 286.49085
|
||||
443.31476 286.82943
|
||||
389.89106 280.79772
|
||||
405.74583 272.00866
|
||||
412.98388 262.01326
|
||||
475.5413 262.1856
|
||||
480.71134 267.01096
|
||||
514.66123 266.66629
|
||||
520.34827 262.01326
|
||||
669.93463 262.01326
|
||||
670.45162 264.08127
|
||||
676.91417 263.82277
|
||||
678.03434 262.09943
|
||||
680.61936 261.66859
|
||||
683.03204 255.46455
|
||||
682.51504 249.94985
|
||||
677.862 243.91814
|
||||
668.81445 243.4873
|
||||
665.28159 247.02016
|
||||
520.86527 246.33082
|
||||
514.66123 240.12678
|
||||
479.67733 239.95444
|
||||
475.5413 243.57347
|
||||
412.98388 243.05647
|
||||
397.64611 227.54636
|
||||
324.74862 221.16998
|
||||
323.88695 214.79361
|
||||
328.36764 211.86392
|
||||
326.6443 207.03856
|
||||
300.79412 207.03856
|
||||
295.62409 211.69159
|
||||
285.28402 208.2449
|
||||
272.01426 211.17458
|
||||
96.577738 209.62357
|
||||
80.205961 211.86392
|
||||
58.491817 232.7164
|
||||
74.863594 254.94755
|
||||
168.61356 269.25131
|
||||
175.16228 276.83403
|
||||
87.271676 260.11758
|
||||
6
testbed/data/test.dat
Normal file
6
testbed/data/test.dat
Normal file
@ -0,0 +1,6 @@
|
||||
227.15518 452.33157
|
||||
344.46202 352.32647
|
||||
472.15156 452.33157
|
||||
603.11967 352.32647
|
||||
344.46202 725.78132
|
||||
81.390847 352.32647
|
||||
244
testbed/main.cc
Normal file
244
testbed/main.cc
Normal file
@ -0,0 +1,244 @@
|
||||
/*
|
||||
* Poly2Tri Copyright (c) 2009-2010, Mason Green
|
||||
* http://code.google.com/p/poly2tri/
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* * Neither the name of Poly2Tri nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include <cstdlib>
|
||||
#include <GL/glfw.h>
|
||||
#include <time.h>
|
||||
#include <fstream>
|
||||
#include <string>
|
||||
#include <sstream>
|
||||
#include <algorithm>
|
||||
#include <iterator>
|
||||
#include <iostream>
|
||||
using namespace std;
|
||||
|
||||
#include "../poly2tri/poly2tri.h"
|
||||
|
||||
|
||||
void Init();
|
||||
void ShutDown(int return_code);
|
||||
void MainLoop();
|
||||
void Draw();
|
||||
|
||||
float rotate_y = 0,
|
||||
rotate_z = 0;
|
||||
const float rotations_per_tick = .2;
|
||||
|
||||
list<Triangle*> triangles;
|
||||
|
||||
double StringToDouble(const std::string& s) {
|
||||
std::istringstream i(s);
|
||||
double x;
|
||||
if (!(i >> x))
|
||||
return 0;
|
||||
return x;
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[]) {
|
||||
|
||||
/*
|
||||
// initialize random seed:
|
||||
srand ( time(NULL) );
|
||||
|
||||
int a = 0;
|
||||
int b = 2000;
|
||||
|
||||
for(int i = 0; i < num_points; i++) {
|
||||
double x = rand() % (b - a - 1) + a + 1;
|
||||
double y = rand() % (b - a - 1) + a + 1;
|
||||
polyline[i] = Point(x, y);
|
||||
}
|
||||
|
||||
polyline[0] = Point(5, 5);
|
||||
polyline[1] = Point(-5, 5);
|
||||
polyline[2] = Point(-5, -5);
|
||||
polyline[3] = Point(5, -5);
|
||||
|
||||
//Point foo[] = {Point(5, 5.1), Point(-5, 5.2), Point(-5, -5.3), Point(5, -5.4), Point(5.1, 5.5), Point(5, 5.5),
|
||||
// Point(-5, 5.6), Point(-5, -5.7), Point(5, -5.8), Point(5, 5.9), Point(-5, 5.1),
|
||||
// Point(-5, -5.11), Point(5, -5.12), Point(5, 5.13), Point(-5, 5.14), Point(-5, -5.15), Point(5, -5.16)};
|
||||
|
||||
*/
|
||||
|
||||
string line;
|
||||
ifstream myfile (argv[1]);
|
||||
vector<Point> points;
|
||||
if (myfile.is_open()) {
|
||||
while (!myfile.eof()) {
|
||||
getline (myfile,line);
|
||||
if(line.size() == 0) {
|
||||
break;
|
||||
}
|
||||
istringstream iss(line);
|
||||
vector<string> tokens;
|
||||
copy(istream_iterator<string>(iss), istream_iterator<string>(),
|
||||
back_inserter<vector<string> >(tokens));
|
||||
double x = StringToDouble(tokens[0]);
|
||||
double y = StringToDouble(tokens[1]);
|
||||
points.push_back(Point(x, y));
|
||||
}
|
||||
myfile.close();
|
||||
} else {
|
||||
cout << "File not opened" << endl;
|
||||
}
|
||||
|
||||
int num_points = points.size();
|
||||
cout << "Number of points = " << num_points << endl;
|
||||
|
||||
Point* polyline = new Point[num_points];
|
||||
for(int i = 0; i < num_points; i++) {
|
||||
polyline[i] = points[i];
|
||||
}
|
||||
|
||||
Init();
|
||||
|
||||
// Perform triangulation
|
||||
double init_time = glfwGetTime();
|
||||
CDT * cdt = new CDT(polyline, num_points);
|
||||
cdt->Triangulate();
|
||||
double dt = glfwGetTime() - init_time;
|
||||
cout << "Elapsed time (secs) = " << dt << endl;
|
||||
|
||||
triangles = cdt->GetTriangles();
|
||||
|
||||
MainLoop();
|
||||
|
||||
delete [] polyline;
|
||||
ShutDown(0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void Init()
|
||||
{
|
||||
const int window_width = 800,
|
||||
window_height = 600;
|
||||
|
||||
if (glfwInit() != GL_TRUE)
|
||||
ShutDown(1);
|
||||
// 800 x 600, 16 bit color, no depth, alpha or stencil buffers, windowed
|
||||
if (glfwOpenWindow(window_width, window_height, 5, 6, 5, 0, 0, 0, GLFW_WINDOW) != GL_TRUE)
|
||||
ShutDown(1);
|
||||
|
||||
glfwSetWindowTitle("The GLFW Window");
|
||||
|
||||
glEnable(GL_BLEND);
|
||||
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
||||
glClearColor(0.0, 0.0, 0.0, 0.0);
|
||||
glHint (GL_LINE_SMOOTH_HINT, GL_NICEST);
|
||||
|
||||
}
|
||||
|
||||
void ShutDown(int return_code)
|
||||
{
|
||||
glfwTerminate();
|
||||
exit(return_code);
|
||||
}
|
||||
|
||||
void MainLoop()
|
||||
{
|
||||
// the time of the previous frame
|
||||
double old_time = glfwGetTime();
|
||||
// this just loops as long as the program runs
|
||||
bool running = true;
|
||||
|
||||
while(running)
|
||||
{
|
||||
// calculate time elapsed, and the amount by which stuff rotates
|
||||
double current_time = glfwGetTime(),
|
||||
delta_rotate = (current_time - old_time) * rotations_per_tick * 360;
|
||||
old_time = current_time;
|
||||
|
||||
// escape to quit, arrow keys to rotate view
|
||||
// Check if ESC key was pressed or window was closed
|
||||
running = !glfwGetKey( GLFW_KEY_ESC ) && glfwGetWindowParam( GLFW_OPENED );
|
||||
|
||||
if (glfwGetKey(GLFW_KEY_LEFT) == GLFW_PRESS)
|
||||
rotate_y += delta_rotate;
|
||||
if (glfwGetKey(GLFW_KEY_RIGHT) == GLFW_PRESS)
|
||||
rotate_y -= delta_rotate;
|
||||
// z axis always rotates
|
||||
rotate_z += delta_rotate;
|
||||
|
||||
// Draw the scene
|
||||
Draw();
|
||||
// swap back and front buffers
|
||||
glfwSwapBuffers();
|
||||
}
|
||||
}
|
||||
|
||||
void ResetZoom(double zoom, double cx, double cy, double width, double height) {
|
||||
|
||||
double left = -width / zoom;
|
||||
double right = width / zoom;
|
||||
double bottom = -height / zoom;
|
||||
double top = height / zoom;
|
||||
|
||||
// Reset viewport
|
||||
glLoadIdentity();
|
||||
glMatrixMode(GL_PROJECTION);
|
||||
glLoadIdentity();
|
||||
|
||||
// Reset ortho view
|
||||
glOrtho(left, right, bottom, top, 1, -1);
|
||||
glTranslatef(-cx, -cy, 0);
|
||||
glMatrixMode(GL_MODELVIEW);
|
||||
glDisable(GL_DEPTH_TEST);
|
||||
glLoadIdentity();
|
||||
|
||||
// Clear the screen
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
}
|
||||
|
||||
void Draw()
|
||||
{
|
||||
// reset zoom
|
||||
double zoom = 0.5;
|
||||
ResetZoom(zoom, 0, 0, 800, 600);
|
||||
|
||||
list<Triangle*>::iterator it;
|
||||
for (it = triangles.begin(); it != triangles.end(); it++) {
|
||||
Triangle* t = *it;
|
||||
Point* a = t->GetPoint(0);
|
||||
Point* b = t->GetPoint(1);
|
||||
Point* c = t->GetPoint(2);
|
||||
|
||||
// Red
|
||||
glColor3f(1, 0, 0);
|
||||
|
||||
glBegin(GL_LINE_LOOP); // Drawing Using Triangles
|
||||
glVertex2f(a->x, a->y); // Top
|
||||
glVertex2f(b->x, b->y); // Bottom Left
|
||||
glVertex2f(c->x, c->y); // Bottom Right
|
||||
glEnd();
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
69
wscript
Normal file
69
wscript
Normal file
@ -0,0 +1,69 @@
|
||||
VERSION='0.0.1'
|
||||
import sys
|
||||
APPNAME='p2t'
|
||||
srcdir = '.'
|
||||
blddir = 'build'
|
||||
|
||||
p2t_source_files = ['poly2tri/sweep/cdt.cc',
|
||||
'poly2tri/sweep/advancing_front.cc',
|
||||
'poly2tri/sweep/mesh.cc',
|
||||
'poly2tri/sweep/sweep_context.cc',
|
||||
'poly2tri/sweep/sweep.cc',
|
||||
'poly2tri/common/shapes.cc']
|
||||
|
||||
testbed_source_files = ['testbed/main.cc']
|
||||
|
||||
#Platform specific libs
|
||||
if sys.platform == 'win32':
|
||||
# MS Windows
|
||||
sys_libs = ['glfw', 'opengl32']
|
||||
elif sys.platform == 'darwin':
|
||||
# Apple OSX
|
||||
sys_libs = ['glfw', 'OpenGL']
|
||||
else:
|
||||
# GNU/Linux, BSD, etc
|
||||
sys_libs = ['glfw', 'GL']
|
||||
|
||||
def init():
|
||||
print(' init called')
|
||||
|
||||
def set_options(opt):
|
||||
print(' set_options')
|
||||
opt.tool_options('g++')
|
||||
|
||||
def configure(conf):
|
||||
print(' calling the configuration')
|
||||
conf.check_tool('g++')
|
||||
#conf.env.CXXFLAGS = ['-O0', '-pg', '-g']
|
||||
conf.env.CXXFLAGS = ['-O0', '-g']
|
||||
#conf.env.CXXFLAGS = ['-O3', '-ffast-math']
|
||||
|
||||
def build(bld):
|
||||
|
||||
print(' building')
|
||||
'''
|
||||
# A static library
|
||||
# The extension (.a) is added automatically
|
||||
bld.new_task_gen(
|
||||
features = 'cxx cstaticlib',
|
||||
source = p2t_source_files,
|
||||
name = 'poly2tri',
|
||||
target = 'poly2tri')
|
||||
|
||||
# 1. A simple program
|
||||
bld.new_task_gen(
|
||||
features = 'cxx cprogram',
|
||||
source = testbed_source_files,
|
||||
target = 'p2t',
|
||||
uselib_local = 'poly2tri',
|
||||
libs = sys_libs)
|
||||
'''
|
||||
|
||||
bld.new_task_gen(
|
||||
features = 'cxx cprogram',
|
||||
source = testbed_source_files + p2t_source_files,
|
||||
target = 'p2t',
|
||||
libs = sys_libs)
|
||||
|
||||
def shutdown():
|
||||
print(' shutdown called')
|
||||
Loading…
Reference in New Issue
Block a user