poly2tri/python/poly2tri.py

#!/usr/bin/env python2.6
from framework import Game, draw_polygon, reset_zoom, draw_line, decompose_poly, makeCCW

from seidel import Triangulator

class Poly2Tri(Game):

    screen_size = 800.0, 600.0

    dude = [[174.50415,494.59368],[215.21844,478.87939],[207.36129,458.87939],[203.07558,441.02225],[203.07558,418.1651],
        [210.93272,394.59367],[224.50415,373.1651],[241.64701,358.1651],[257.36129,354.59367],[275.93272,356.73653],
        [293.07558,359.59367],[309.50415,377.45082],[322.36129,398.1651],[331.64701,421.73653],[335.21844,437.45082],
        [356.64701,428.52225],[356.1113,428.34367],[356.1113,428.34367],[368.78987,419.59368],[349.50415,384.59367],
        [323.78987,359.59367],[290.93272,343.87939],[267.36129,341.02225],[264.50415,331.02225],[264.50415,321.02225],
        [268.78987,306.02225],[285.93272,286.02225],[295.21844,270.30796],[303.78987,254.59367],[306.64701,213.87939],
        [320,202.36218],[265,202.36218],[286.64701,217.45082],[293.78987,241.02225],[285,257.36218],[270.93272,271.73653],
        [254.50415,266.02225],[250.93272,248.1651],[256.64701,233.1651],[256.64701,221.02225],[245.93272,215.30796],
        [238.78987,216.73653],[233.78987,232.45082],[232.36129,249.59367],[243.07558,257.09367],[242.89701,270.30796],
        [235.93272,279.95082],[222.36129,293.1651],[205.21844,300.6651],[185,297.36218],[170,242.36218],[175,327.36218],
        [185,322.36218],[195,317.36218],[230.75415,301.02225],[235.39701,312.45082],[240.57558,323.52225],
        [243.61129,330.48653],[245.21844,335.12939],[245.03987,344.4151],[229.86129,349.4151],[209.14701,362.09367],
        [192.89701,377.80796],[177.18272,402.27225],[172.36129,413.87939],[169.14701,430.48653],[168.61129,458.52225],
        [168.61129,492.80796]]
        
    def __init__(self):
        super(Poly2Tri, self).__init__(*self.screen_size)       
        
        # Load point set
        file_name = "../data/dude.dat"
        self.points = self.load_points(file_name)
        
        # Triangulate
        t1 = self.time
        seidel = Triangulator(self.points)
        dt = (self.time - t1) * 1000.0
        
        self.triangles = seidel.triangles()
        #self.trapezoids = seidel.trapezoids
        self.trapezoids = seidel.trapezoidal_map.map
        self.edges = seidel.edge_list
        print "time (ms) = %f  , num triangles = %d" % (dt, len(self.triangles))
        
        for p in self.dude:
            p[0] -= 75
            
        makeCCW(self.dude)
        self.dude_poly = []
        t1 = self.time
        decompose_poly(self.dude, self.dude_poly)
        dt = (self.time - t1) * 1000.0
        print "time (ms) = %f  , num polies = %d" % (dt, len(self.dude_poly))
        
        self.main_loop()
        
    def update(self):
        pass
        
    def render(self):
        reset_zoom(2.1, (300, 450), self.screen_size)
        red = 255, 0, 0
        yellow = 255, 255, 0
        green = 0, 255, 0
        for t in self.triangles:
            draw_polygon(t, red)
        
        for p in self.dude_poly:
            draw_polygon(p, red)
            
        '''
        for t in self.trapezoids:
            verts = self.trapezoids[t].vertices()
            #verts = t.vertices()
            draw_polygon(verts, yellow)
        '''
        for e in self.edges:
            p1 = e.p.x, e.p.y
            p2 = e.q.x, e.q.y
            draw_line(p1, p2, green)

        #draw_polygon(self.points, green)
        
        
    def load_points(self, file_name):
        infile = open(file_name, "r")
        points = []
        while infile:
            line = infile.readline()
            s = line.split()
            if len(s) == 0:
                break
            points.append((float(s[0]), float(s[1])))
        return points

spam = (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)
eggs = [474.80999000000003, 555.15656999999999], [474.80999000000003, 530.87086999999997], [509.09570000000002, 530.87086999999997], [543.38142000000005, 530.87086999999997], [543.38142000000005, 555.15656999999999], [543.38142000000005, 579.44227000000001], [509.09570000000002, 579.44227000000001], [474.80999000000003, 579.44227000000001]   

if __name__ == '__main__':
    demo = Poly2Tri()