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from math import sqrt, pi, sin, cos
import glitch, glitch.glut
from glitch.limbo.lights import LightSwitch, AmbientLight, DiffuseLight
from glitch.limbo.objects import Grid
from glitch.limbo.material import Material
from glitch.limbo.mesh import Mesh
from glitch.limbo.spread import Spread
def make_tetrahedron():
r3 = sqrt(3)
mesh = Mesh()
mesh.vertices = [(0, 0, 0), (0.5, 0, r3/2), (1, 0, 0), (0.5, r3/2, r3/6)]
mesh.faces = [(0, 2, 1), (1, 3, 0), (0, 3, 2), (1, 2, 3)]
return mesh
def make_cube():
mesh = Mesh()
mesh.vertices = [
(0., 0., 0.), (0., 0., 1.), (0., 1., 0.), (0., 1., 1.),
(1., 0., 0.), (1., 0., 1.), (1., 1., 0.), (1., 1., 1.)]
mesh.faces = [
(1, 3, 2), (2, 0, 1), # x = 0
(4, 6, 7), (7, 5, 4), # x = 1
(0, 4, 5), (5, 1, 0), # y = 0
(7, 6, 2), (2, 3, 7), # y = 1
(0, 2, 6), (6, 4, 0), # z = 0
(5, 7, 3), (3, 1, 5), # z = 1
]
return mesh
def make_sphere():
# Number of slices.
m = 20
# Number of wedges.
n = 10
r = 0.5
vertices = []
faces = []
for i in xrange(1, n):
s = i * pi / n
r_ = r * sin(s)
vertices.extend([
(r + r_ * sin(t * 2 * pi / m),
r * (1 - cos(s)),
r + r_ * cos(t * 2 * pi / m))
for t in xrange(m)])
for i in xrange(n - 2):
for j in xrange(m):
faces.append(
(m * i + j,
m * i + (j + 1) % m,
m * (i + 1) + j))
faces.append(
(m * i + (j + 1) % m,
m * (i + 1) + (j + 1) % m,
m * (i + 1) + j))
l = len(vertices)
p0 = (0.5, 0, 0.5)
p1 = (0.5, 1, 0.5)
vertices.extend([p0, p1])
for i in xrange(m):
faces.append((l, (i + 1) % m, i))
faces.append((l + 1, l - m + i, l - m + (i + 1) % m))
mesh = Mesh()
mesh.vertices = vertices
mesh.faces = faces
return mesh
if __name__ == '__main__':
mesh1 = make_tetrahedron()
mesh2 = make_cube()
mesh3 = make_sphere()
camera = glitch.glut.GLUTCamera(eye=[0, 4, 5], ref=[2.5, 0, 2.5], children=[
glitch.Rotate(90, x=3, children=[
glitch.Scale(5, 5, 1, children=[Grid()])]),
LightSwitch(children=[
AmbientLight(intensity=0.05, x=-1, z=4, y=2, children=[
DiffuseLight(x=-1, z=4, y=2, children=[
Material(r=0.9, g=0.5, b=0.5, children=[
Spread(x=2, z=2, children=[mesh1, mesh2, mesh3])
])])])])])
camera.run()
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