3rd-party/poly2tri
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added SHEAR setting

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zzzzrrr 2009-11-19 12:27:34 -05:00
parent 7f473799ac
commit 93e9955a66
2 changed files with 9 additions and 4 deletions
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6
python/poly2tri.py
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@ -30,12 +30,12 @@ class Poly2Tri(Game):
pass pass
def render(self): def render(self):
reset_zoom(8, (0, 0), self.screen_size) reset_zoom(7, (0, 0), self.screen_size)
red = 255, 0, 0 red = 255, 0, 0
for t in self.triangles: for t in self.triangles:
draw_polygon(t, red) draw_polygon(t, red)
green = 0, 255, 0 green = 0, 255, 0
#draw_polygon(self.points, green) draw_polygon(self.points, green)
''' '''
yellow = 255, 255, 0 yellow = 255, 255, 0
for t in self.trapezoids: for t in self.trapezoids:
@ -55,5 +55,7 @@ class Poly2Tri(Game):
points.append((float(s[0]), float(s[1]))) points.append((float(s[0]), float(s[1])))
return points return points
bad = (544.80998999999997, 579.86046999999996), (544.80998999999997, 450.57477), (594.09569999999997, 450.57477), (643.38142000000005, 450.57477), (643.38142000000005, 525.26486999999997), (643.38142000000005, 599.95487000000003), (603.67391999999995, 654.55056999999999), (563.96655999999996, 709.14621999999997), (554.38819999999998, 709.14621999999997), (544.80998999999997, 709.14621999999997)
if __name__ == '__main__': if __name__ == '__main__':
demo = Poly2Tri() demo = Poly2Tri()

7
python/seidel.py
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@ -38,6 +38,9 @@ from math import atan2
## (Ported from poly2tri) ## (Ported from poly2tri)
## ##
# Shear transform. Can effect numerical robustness
SHEAR = 1e-6
class Point(object): class Point(object):
def __init__(self, x, y): def __init__(self, x, y):
@ -297,11 +300,11 @@ class Triangulator(object):
edges.append(Edge(q, p)) edges.append(Edge(q, p))
elif p.x < q.x: elif p.x < q.x:
edges.append(Edge(p, q)) edges.append(Edge(p, q))
#shuffle(edges) shuffle(edges)
return edges return edges
def shear_transform(self, point): def shear_transform(self, point):
return Point(point.x + 1e-4 * point.y, point.y) return Point(point.x + SHEAR * point.y, point.y)
def merge_sort(l): def merge_sort(l):
if len(l)>1 : if len(l)>1 :