3rd-party
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poly2tri
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optimizations

This commit is contained in:
masongreen 2009-07-17 00:20:34 -04:00
parent 59af31682d
commit dfcec3e307
6 changed files with 42 additions and 37 deletions
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3
src/org/poly2tri/MonoToneMountain.scala
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@ -115,8 +115,7 @@ class MonotoneMountain {
if(valid(c)) convexPoints.enqueue(c)
}
assert(size <= 3, "Triangulation bug")
if(size == 3)lastTriangle
assert(size <= 2, "Triangulation bug")
}
}

36
src/org/poly2tri/Poly2Tri.scala
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@ -55,10 +55,12 @@ object Poly2Tri {
class Poly2TriDemo extends BasicGame("Poly2Tri") {
var tesselator: Triangulator = null
var segments: ArrayBuffer[Segment] = null
var quit = false
var debug = false
var drawMap = false
var drawSegs = false
var hiLighter = 0
def init(container: GameContainer) {
@ -79,14 +81,17 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
if(debug) {
val draw = if(drawMap) tesselator.trapezoidMap else tesselator.trapezoids
for(t <- draw) {
assert(t.rightPoint != t.leftPoint)
val polygon = new Polygon()
for(v <- t.vertices) {
polygon.addPoint(v.x, v.y)
}
val lCirc = new Circle(t.leftPoint.x, t.leftPoint.y, 4)
g.setColor(blue); g.draw(lCirc); g.fill(lCirc)
val rCirc = new Circle(t.rightPoint.x, t.rightPoint.y, 4)
//g.setColor(yellow); g.draw(rCirc); g.fill(rCirc)
if(!drawMap) {
val lCirc = new Circle(t.leftPoint.x, t.leftPoint.y, 4)
g.setColor(blue); g.draw(lCirc); g.fill(lCirc)
val rCirc = new Circle(t.rightPoint.x+5, t.rightPoint.y, 4)
g.setColor(yellow); g.draw(rCirc); g.fill(rCirc)
}
g.setColor(red)
g.draw(polygon)
}
@ -98,12 +103,14 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
if(t.size < 3) println("wtf")
val triangle = new Polygon
t.foreach(p => triangle.addPoint(p.x, p.y))
val color = if(i == hiLighter) blue else red
g.setColor(color)
g.setColor(red)
g.draw(triangle)
i += 1
}
} else {
val triangle = new Polygon
tesselator.triangles(hiLighter).foreach(p => triangle.addPoint(p.x, p.y))
g.setColor(blue)
g.draw(triangle)
} else if (debug && drawMap){
for(mp <- tesselator.monoPolies) {
val poly = new Polygon
mp.foreach(p => poly.addPoint(p.x, p.y))
@ -111,6 +118,12 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
g.draw(poly)
}
}
if(drawSegs) {
g.setColor(green)
for(s <- segments)
g.drawLine(s.p.x,s.p.y,s.q.x,s.q.y)
}
}
@ -135,6 +148,7 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
if(c == '1') {poly; hiLighter = 0}
if(c == '2') {snake; hiLighter = 0}
if(c == '3') {star; hiLighter = 0}
if(c == 's') drawSegs = !drawSegs
}
@ -158,7 +172,7 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
val p15 = Point(180,352)
val p16 = Point(300,312)
val segments = new ArrayBuffer[Segment]
segments = new ArrayBuffer[Segment]
segments += new Segment(p1, p2)
segments += new Segment(p2, p3)
segments += new Segment(p3, p4)
@ -193,7 +207,7 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
val p9 = Point(231,161)
val p10 = Point(321,161)
val segments = new ArrayBuffer[Segment]
segments = new ArrayBuffer[Segment]
segments += new Segment(p1, p2)
segments += new Segment(p2, p3)
segments += new Segment(p3, p4)
@ -226,7 +240,7 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
val p11 = Point(1,20)*scale+displace
val p12 = Point(1,10)*scale+displace
val segments = new ArrayBuffer[Segment]
segments = new ArrayBuffer[Segment]
segments += new Segment(p1, p2)
segments += new Segment(p2, p3)
segments += new Segment(p3, p4)

2
src/org/poly2tri/QueryGraph.scala
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@ -49,7 +49,7 @@ class QueryGraph(var head: Node) {
if(s > trapezoids(j).rightPoint) {
trapezoids += trapezoids(j).upperRight
} else {
trapezoids += trapezoids(j).lowerRight
trapezoids += trapezoids(j).lowerRight
}
j += 1
}

2
src/org/poly2tri/Trapezoid.scala
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@ -80,7 +80,7 @@ class Trapezoid(val leftPoint: Point, var rightPoint: Point, val top: Segment, v
verts(1) = lineIntersect(bottom, leftPoint.x)
verts(2) = lineIntersect(bottom, rightPoint.x)
verts(3) = lineIntersect(top, rightPoint.x)
return verts
verts
}
def lineIntersect(s: Segment, x: Float) = {

33
src/org/poly2tri/TrapezoidalMap.scala
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@ -48,13 +48,13 @@ class TrapezoidalMap {
// Add a trapezoid to the map
def add(t: Trapezoid) {
assert(t != null)
assert(t != null, "Bad value")
map += t
}
// Remove a trapezoid from the map
def remove(t: Trapezoid) {
assert(t != null)
assert(t != null, "Bad value")
map -=t
}
@ -93,12 +93,10 @@ class TrapezoidalMap {
assert(s.p.x < s.q.x)
val rp = if(s.q.x == t.rightPoint.x) s.q else t.rightPoint
val trapezoids = new ArrayBuffer[Trapezoid]
trapezoids += new Trapezoid(t.leftPoint, s.p, t.top, t.bottom)
trapezoids += new Trapezoid(s.p, rp, t.top, s)
trapezoids += new Trapezoid(s.p, rp, s, t.bottom)
trapezoids += new Trapezoid(s.p, t.rightPoint, t.top, s)
trapezoids += new Trapezoid(s.p, t.rightPoint, s, t.bottom)
trapezoids(0).update(t.upperLeft, t.lowerLeft, trapezoids(1), trapezoids(2))
trapezoids(1).update(trapezoids(0), null, t.upperRight, null)
@ -118,20 +116,17 @@ class TrapezoidalMap {
assert(s.p.x != s.q.x)
assert(s.p.x < s.q.x)
val lp = if(s.p.x == t.leftPoint.x) s.p else t.leftPoint
val rp = if(s.q.x == t.rightPoint.x) s.q else t.rightPoint
val topCross = (tCross == t.top)
val bottomCross = (bCross == t.bottom)
val trapezoids = new ArrayBuffer[Trapezoid]
trapezoids += {if(topCross) t.upperLeft else new Trapezoid(lp, rp, t.top, s)}
trapezoids += {if(bottomCross) t.lowerLeft else new Trapezoid(lp, rp, s, t.bottom)}
trapezoids += {if(topCross) t.upperLeft else new Trapezoid(t.leftPoint, t.rightPoint, t.top, s)}
trapezoids += {if(bottomCross) t.lowerLeft else new Trapezoid(t.leftPoint, t.rightPoint, s, t.bottom)}
if(topCross) {
trapezoids(0).upperRight = t.upperRight
if(t.upperRight != null) t.upperRight.upperLeft = trapezoids(0)
trapezoids(0).rightPoint = rp
trapezoids(0).rightPoint = t.rightPoint
} else {
trapezoids(0).update(t.upperLeft, s.above, t.upperRight, null)
}
@ -139,7 +134,7 @@ class TrapezoidalMap {
if(bottomCross) {
trapezoids(1).lowerRight = t.lowerRight
if(t.lowerRight != null) t.lowerRight.lowerLeft = trapezoids(1)
trapezoids(1).rightPoint = rp
trapezoids(1).rightPoint = t.rightPoint
} else {
trapezoids(1).update(s.below, t.lowerLeft, null, t.lowerRight)
}
@ -157,15 +152,13 @@ class TrapezoidalMap {
def case4(t: Trapezoid, s: Segment) = {
assert(s.p.x < s.q.x)
val lp = if(s.p.x == t.leftPoint.x) s.p else t.leftPoint
val topCross = (tCross == t.top)
val bottomCross = (bCross == t.bottom)
val trapezoids = new ArrayBuffer[Trapezoid]
trapezoids += {if(topCross) t.upperLeft else new Trapezoid(lp, s.q, t.top, s)}
trapezoids += {if(bottomCross) t.lowerLeft else new Trapezoid(lp, s.q, s, t.bottom)}
trapezoids += {if(topCross) t.upperLeft else new Trapezoid(t.leftPoint, s.q, t.top, s)}
trapezoids += {if(bottomCross) t.lowerLeft else new Trapezoid(t.leftPoint, s.q, s, t.bottom)}
trapezoids += new Trapezoid(s.q, t.rightPoint, t.top, t.bottom)
if(topCross) {
@ -210,7 +203,7 @@ class TrapezoidalMap {
val top = new Segment(Point(min.x, max.y), Point(max.x, max.y))
val bottom = new Segment(Point(min.x, min.y), Point(max.x, min.y))
val left = bottom.p
val right = top.q
val right = bottom.q
return new Trapezoid(left, right, top, bottom)
}

3
src/org/poly2tri/Triangulator.scala
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@ -75,7 +75,7 @@ class Triangulator(segments: ArrayBuffer[Segment]) {
}
trapezoidalMap reset
}
// Mark outside trapezoids
trapezoidalMap.map.foreach(markOutside)
@ -111,7 +111,6 @@ class Triangulator(segments: ArrayBuffer[Segment]) {
// Initialize trapezoidal map and query structure
private val trapezoidalMap = new TrapezoidalMap
private val boundingBox = trapezoidalMap.boundingBox(segments)
trapezoidalMap add boundingBox
private val queryGraph = new QueryGraph(Sink.init(boundingBox))
private val xMonoPoly = new ArrayBuffer[MonotoneMountain]