Makes interesting shapes on the screen. Too bad PyGame's draw-polygon
routine is non-antialiased, but it's maybe more interesting in that it
uses the even-odd rule.
#!/usr/bin/python
import pygame, math, random
def main():
pygame.init()
(w, h) = (1024, 768)
screen = pygame.display.set_mode((w, h), pygame.FULLSCREEN)
color = (255, 64, 64)
center = (w/2, h/2)
r = h/2
d_d_theta = math.pi / 70
d_theta = 0
npoints = 3
while 1:
ev = pygame.event.poll()
if ev.type == pygame.NOEVENT:
screen.fill((0, 0, 0))
d_theta += d_d_theta / npoints
if d_theta > 2 * math.pi:
d_theta %= 2 * math.pi
npoints += 1
pointslist = [(w/2 + r * math.sin(ii * d_theta),
h/2 + r * -math.cos(ii * d_theta))
for ii in range(npoints)]
pygame.draw.polygon(screen, color, pointslist)
pygame.display.flip()
if ev.type == pygame.MOUSEBUTTONDOWN: break
elif ev.type == pygame.QUIT: break
if __name__ == '__main__': main()
