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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
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
# All normals point outward in XZ... not quite right, but there is already a cone primitive :)
model.normal = model.pos
model.normal[2::3,0] = sin((t[:-1]+t[1:])/2)
model.normal[2::3,1] = 0
model.normal[2::3,2] = cos((t[:-1]+t[1:])/2)
model.color = model.pos/2 + (0.5,0,0.5)
model.smooth_shade(doublesided=0)
##model.color[0::3] = (1,1,1) # show where the triangles are
while 1:
rate(100)
f.rotate(angle=0.01)
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