Dear soya-users,
Below is an even simpler script to demonstrate the bug. The difference
between the bug-free and buggy behaviour is this:
if show_the_bug:
sf=soya.Face(triangle,[p0,p2,p1])
else:
sf=soya.Face(triangle,[p0,p1,p2])
i.e., the difference is in the orientation of the vertices making up
the face.
The complete script is below.
Regards,
Rory
==snip============================================================
import sys, os, os.path, soya
show_the_bug=0
soya.init()
scene = soya.World()
light = soya.Light(scene)
light.diffuse=(1,1,1,1)
light.set_xyz(0.5, 0.0, 2.0)
line=soya.World(scene)
v1=soya.Vertex(scene,0.0,0.0,0.0)
v2=soya.Vertex(scene,0.0,1.0,0.0)
v1.diffuse=(1,0,0,1)
v2.diffuse=(1,0,0,1)
soya.Face(line,
[ v1,
v2 ])
line.set_xyz(2,0,1)
triangle=soya.World(scene)
p0=soya.Vertex(triangle,-0.5,0,0)
p1=soya.Vertex(triangle,0.5,0,0)
p2=soya.Vertex(triangle,0,0.5,0)
if show_the_bug:
sf=soya.Face(triangle,[p0,p2,p1])
else:
sf=soya.Face(triangle,[p0,p1,p2])
sf.double_sided=1
triangle.z = -2
camera = soya.Camera(scene)
camera.z = 2.0
soya.set_root_widget(camera)
soya.Idler(scene).idle()
==snip============================================================
