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from visual import *
# Example of use of faces object for building arbitrary shapes (here, a cone)
# David Scherer July 2001
f = frame()
box( size=(0.5,0.5,0.5) )
# Make a cone (smooth shading, no bottom, normals are not quite physical)
N = 20
try: # numpy
model = faces( pos = zeros( (N*3,3), float ), frame = f )
except: # older Numeric
model = faces( pos = zeros( (N*3,3), Float ), frame = f )
t = arange(0,2*pi+2*pi/N,2*pi/N)
# Vertex 0 of triangles
model.pos[0::3, 0] = sin(t[:-1])
model.pos[0::3, 2] = cos(t[:-1])
# Vertex 1 of triangles
model.pos[1::3, 0] = sin(t[1:])
model.pos[1::3, 2] = cos(t[1:])
# Vertex 2 of triangles (point of cone)
model.pos[2::3, 1] = 2
# Construct normals to the edges of the triangles
model.normal = model.pos
model.normal[2::3,0] = sin(t[1:])
model.normal[0::1,1] = 0.5
model.normal[2::3,2] = cos(t[1:])
# Give each face a hue running from 0 to 1
model.color = model.pos
for vertex in range(3*N):
hue = float(vertex // 3)/N
model.color[vertex] = color.hsv_to_rgb((hue,1,1))
##model.color = model.pos/2 + (0.5,0,0.5) # alternative coloring
while 1:
rate(100)
f.rotate(angle=0.01)
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