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import math
import glitch, glitch.glut
from glitch.limbo.blend import Blend
from glitch.cairo.draw import CairoTexture
class Chequer(CairoTexture):
def draw_cairo(self, cr):
w = self.width / 10
h = self.height / 10
for y in xrange(10):
for x in xrange(10):
if (x + y) % 2 == 0:
cr.set_source_rgba(0.5, 0.5, 0.5, 0.7)
else:
cr.set_source_rgba(0.8, 0.8, 0.8, 0.7)
cr.move_to(x * w, y * h)
cr.rel_line_to(w, 0)
cr.rel_line_to(0, h)
cr.rel_line_to(-w, 0)
cr.rel_line_to(0, -0)
cr.fill()
class Circles(CairoTexture):
def draw_cairo(self, cr):
c1 = (1.0, 0.7, 0.7)
c2 = (1.0, 1.0, 0.7)
c3 = (0.7, 1.0, 1.0)
rmax = int(max(self.width, self.height) / math.sqrt(2))
for i, r in enumerate(xrange(rmax, 0, -int(rmax / 5))):
cr.set_source_rgb(*(c1, c2, c3)[i % 3])
cr.arc(self.width / 2, self.height / 2, r, 0, 2 * math.pi)
cr.fill()
if __name__ == '__main__':
o1 = glitch.Translate(-0.25, 0, 0, children=[
glitch.Rotate(20, 0, 1, 0, children=[
glitch.ApplyTexture(Chequer(400, 400), children=[
glitch.TexturedSquare()])])])
o2 = glitch.Translate(0.25, 0, -0.5, children=[
glitch.Rotate(20, 0, -1, 0, children=[
glitch.ApplyTexture(Circles(400, 400), children=[
glitch.TexturedSquare()])])])
# XXX: Scene manually sorted farthest first.
camera = glitch.glut.GLUTCamera(eye=[0, 0.75, 2.0], children=[
Blend(children=[o2, o1])])
camera.run()
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