mirror of https://github.com/jhasse/poly2tri.git
happy bug hunting
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zzzzrrr
parent
76a60ae144
commit
1e660e965e
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@ -79,9 +79,8 @@ cdef class Game:
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def __init__(self, window_width, window_height):
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p1 = Point(12, 10)
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p2 = Point(50, 47)
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print p1.cross(p2)
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points = [Point(100,100), Point(-100,100), Point(-100,-100), Point(100,-100)]
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seidel = Triangulator(points)
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glfwInit()
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@ -50,8 +50,8 @@ class Triangulator:
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self.edge_list = self.init_edges(points)
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self.trapezoids = []
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self.trapezoidal_map = TrapezoidalMap()
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boundingBox = self.trapezoidal_map.boundingBox(self.edge_list)
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self.query_graph = QueryGraph(Sink(boundingBox))
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bounding_box = self.trapezoidal_map.bounding_box(self.edge_list)
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self.query_graph = QueryGraph(Sink(bounding_box))
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self.xmono_poly = []
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self.process()
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@ -61,9 +61,12 @@ class Triangulator:
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# Build the trapezoidal map and query graph
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def process(self):
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for e in self.edge_list:
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traps = self.query_graph.followSegment(e)
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traps = self.query_graph.follow_edge(e)
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for t in traps:
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self.trapezoidal_map.map.remove(t)
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try:
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self.trapezoidal_map.map.remove(t)
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except:
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pass
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for t in traps:
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tlist = []
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cp = t.contains(e.p)
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@ -119,7 +122,7 @@ class Triangulator:
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self.xmono_poly.append(mountain)
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def mark_outside(self, t):
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if t.top is self.boundingBox.top or t.bottom is self.boundingBox.bottom:
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if t.top is self.bounding_box.top or t.bottom is self.bounding_box.bottom:
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t.trimNeighbors()
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def init_edges(self, points):
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@ -291,17 +294,16 @@ cdef Point line_intersect(Edge e, float x):
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cdef class Trapezoid:
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cdef:
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Point lpoint, rpoint
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Point left_point, right_point
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Edge top, bottom
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Trapezoid upper_left, lower_left
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Trapezoid upper_right, lower_right
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bool inside
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sink = None
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object sink
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def __init__(self, Point lpoint, Point rpoint, Edge top, Edge bottom):
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self.lpoint = lpoint
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self.rpoint = rpoint
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def __init__(self, Point left_point, Point right_point, Edge top, Edge bottom):
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self.left_point = left_point
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self.right_point = right_point
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self.top = top
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self.bottom = bottom
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self.upper_left = None
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@ -309,6 +311,23 @@ cdef class Trapezoid:
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self.lower_left = None
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self.lower_right = None
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self.inside = True
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self.sink = None
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property top:
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def __get__(self): return self.top
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property bottom:
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def __get__(self): return self.bottom
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property left_point:
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def __get__(self): return self.left_point
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property right_point:
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def __get__(self): return self.right_point
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property sink:
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def __get__(self): return self.sink
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def __set__(self, object s): self.sink = s
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property upper_left:
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def __get__(self): return self.upper_left
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@ -357,30 +376,30 @@ cdef class Trapezoid:
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if self.lower_right != None: self.lower_right.trim_neighbors()
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def contains(self, Point point):
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return (point.x > self.lpoint.x and point.x < self.rpoint.x and
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return (point.x > self.left_point.x and point.x < self.right_point.x and
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self.top.is_above(point) and self.bottom.is_below(point))
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def vertices(self):
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cdef list verts = []
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verts.append(line_intersect(self.top, self.lpoint.x))
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verts.append(line_intersect(self.bottom, self.lpoint.x))
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verts.append(line_intersect(self.bottom, self.rpoint.x))
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verts.append(line_intersect(self.top, self.rpoint.x))
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verts.append(line_intersect(self.top, self.left_point.x))
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verts.append(line_intersect(self.bottom, self.left_point.x))
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verts.append(line_intersect(self.bottom, self.right_point.x))
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verts.append(line_intersect(self.top, self.right_point.x))
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return verts
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def add_points(self):
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if self.lpoint != self.bottom.p:
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self.bottom.mpoints.append(self.lpoint.clone)
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if self.rpoint != self.bottom.q:
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self.bottom.mpoints.append(self.rpoint.clone)
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if self.lpoint != self.top.p:
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self.top.mpoints.append(self.lpoint.clone)
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if self.rpoint != self.top.q:
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self.top.mpoints.append(self.rpoint.clone)
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if self.left_point != self.bottom.p:
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self.bottom.mpoints.append(self.left_point.clone)
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if self.right_point != self.bottom.q:
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self.bottom.mpoints.append(self.right_point.clone)
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if self.left_point != self.top.p:
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self.top.mpoints.append(self.left_point.clone)
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if self.right_point != self.top.q:
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self.top.mpoints.append(self.right_point.clone)
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class TrapezoidalMap:
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map = {}
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map = []
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margin = 50
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bcross = None
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tcross = None
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@ -390,11 +409,11 @@ class TrapezoidalMap:
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self.tcross = None
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def case1(self, t, e):
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trapezoids = [None, None, None, None]
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trapezoids.append(Trapezoid(t.lpoint, e.p, t.top, t.bottom))
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trapezoids = []
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trapezoids.append(Trapezoid(t.left_point, e.p, t.top, t.bottom))
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trapezoids.append(Trapezoid(e.p, e.q, t.top, e))
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trapezoids.append(Trapezoid(e.p, e.q, e, t.bottom))
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trapezoids.append(Trapezoid(e.q, t.rpoint, t.top, t.bottom))
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trapezoids.append(Trapezoid(e.q, t.right_point, t.top, t.bottom))
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trapezoids[0].update_left(t.upper_left, t.lower_left)
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trapezoids[1].update_left_right(trapezoids[0], None, trapezoids[3], None)
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trapezoids[2].update_left_right(None, trapezoids[0], None, trapezoids[3])
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@ -402,9 +421,9 @@ class TrapezoidalMap:
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return trapezoids
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def case2(self, t, e):
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rp = e.q if e.q.x == t.rpoint.x else t.rpoint
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trapezoids = [None, None, None]
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trapezoids.append(Trapezoid(t.lpoint, e.p, t.top, t.bottom))
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rp = e.q if e.q.x == t.right_point.x else t.right_point
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trapezoids = []
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trapezoids.append(Trapezoid(t.left_point, e.p, t.top, t.bottom))
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trapezoids.append(Trapezoid(e.p, rp, t.top, e))
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trapezoids.append(Trapezoid(e.p, rp, e, t.bottom))
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trapezoids[0].update_left(t.upper_left, t.lower_left)
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@ -417,22 +436,22 @@ class TrapezoidalMap:
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return trapezoids
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def case3(self, t, e):
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lp = e.p if e.p.x == t.lpoint.x else t.lpoint
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rp = e.q if e.q.x == t.rpoint.x else t.rpoint
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trapezoids = [None, None]
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lp = e.p if e.p.x == t.left_point.x else t.left_point
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rp = e.q if e.q.x == t.right_point.x else t.right_point
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trapezoids = []
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if self.tcross is t.top:
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trapezoids[0] = t.upper_left
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trapezoids.append(t.upper_left)
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trapezoids[0].update_right(t.upper_right, None)
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trapezoids[0].rpoint = rp
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trapezoids[0].right_point = rp
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else:
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trapezoids[0] = Trapezoid(lp, rp, t.top, e)
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trapezoids.append(Trapezoid(lp, rp, t.top, e))
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trapezoids[0].update_left_right(t.upper_left, e.above, t.upper_right, None)
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if self.bcross is t.bottom:
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trapezoids[1] = t.lower_left
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trapezoids.append(t.lower_left)
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trapezoids[1].update_right(None, t.lower_right)
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trapezoids[1].rpoint = rp
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trapezoids[1].right_point = rp
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else:
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trapezoids[1] = Trapezoid(lp, rp, e, t.bottom)
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trapezoids.append(Trapezoid(lp, rp, e, t.bottom))
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trapezoids[1].update_left_right(e.below, t.lower_left, None, t.lower_right)
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self.bcross = t.bottom
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self.tcross = t.top
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@ -441,21 +460,21 @@ class TrapezoidalMap:
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return trapezoids
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def case4(self, t, e):
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lp = e.p if e.p.x == t.lpoint.x else t.lpoint
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trapezoids = [None, None, None]
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lp = e.p if e.p.x == t.left_point.x else t.left_point
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trapezoids = []
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if self.tcross is t.top:
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trapezoids[0] = t.upper_left
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trapezoids[0].rpoint = e.q
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trapezoids.append(t.upper_left)
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trapezoids[0].right_point = e.q
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else:
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trapezoids[0] = Trapezoid(lp, e.q, t.top, e)
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trapezoids.append(Trapezoid(lp, e.q, t.top, e))
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trapezoids[0].update_left(t.upper_left, e.above)
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if self.bcross is t.bottom:
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trapezoids[1] = t.lower_left
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trapezoids[1].rpoint = e.q
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trapezoids.append(t.lower_left)
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trapezoids[1].right_point = e.q
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else:
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trapezoids[1] = Trapezoid(lp, e.q, e, t.bottom)
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trapezoids.append(Trapezoid(lp, e.q, e, t.bottom))
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trapezoids[1].update_left(e.below, t.lower_left)
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trapezoids[2] = Trapezoid(e.q, t.rpoint, t.top, t.bottom)
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trapezoids.append(Trapezoid(e.q, t.right_point, t.top, t.bottom))
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trapezoids[2].update_left_right(trapezoids[0], trapezoids[1], t.upper_right, t.lower_right)
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return trapezoids
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@ -486,22 +505,26 @@ class Node:
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def __init__(self, left, right):
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self.left = left
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self.right = right
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if left is not None: left.parent_list.append(self)
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if right is not None: right.parent_list.append(self)
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if left != None: left.parent_list.append(self)
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if right != None: right.parent_list.append(self)
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def replace(self, node):
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for parent in node.parent_list:
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if parent.left is node: parent.left = self
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else: parent.right = self
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if parent.left is node:
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parent.left = self
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else:
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parent.right = self
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self.parent_list.append(parent)
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class Sink(Node):
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def __new__(cls, trapezoid):
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if trapezoid.sink is not None: return trapezoid.sink
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else: return Sink(trapezoid)
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if trapezoid.sink != None:
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return trapezoid.sink
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return Sink(trapezoid)
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def __init__(self, trapezoid):
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self.trapezoid = trapezoid
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Node.__init__(self, None, None)
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trapezoid.sink = self
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@ -517,8 +540,9 @@ class XNode(Node):
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self.rchild = rchild
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def locate(self, e):
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if e.p.x >= self.point.x: return self.right.locate(e)
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else: return self.left.locate(e)
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if e.p.x >= self.point.x:
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return self.right.locate(e)
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return self.left.locate(e)
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class YNode(Node):
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@ -529,11 +553,14 @@ class YNode(Node):
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self.rchild = rchild
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def locate(self, e):
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if self.edge.is_above(e.p): return self.right.locate(e)
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elif self.edge.is_below(e.p): return self.left.locate(e)
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if self.edge.is_above(e.p):
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return self.right.locate(e)
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elif self.edge.is_below(e.p):
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return self.left.locate(e)
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else:
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if e.slope < self.edge.slope: return self.right.locate(e)
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else: return self.left.locate(e)
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if e.slope < self.edge.slope:
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return self.right.locate(e)
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return self.left.locate(e)
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class QueryGraph:
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@ -545,7 +572,7 @@ class QueryGraph:
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def locate(self, e):
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return self.head.locate(e).trapezoid
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def follow_segment(self, e):
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def follow_edge(self, e):
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trapezoids = [self.locate(e)]
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j = 0
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while(e.q.x > trapezoids[j].right_point.x):
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@ -658,7 +685,7 @@ cdef class MonotoneMountain:
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cdef void gen_mono_poly(self):
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cdef Point p = self.head
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while(p is not None):
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while(p != None):
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self.mono_poly.append(p)
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p = p.next
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