Hi Michael,
So I have been reworking to support the shadows. Does the tex gen coords get
stored in the texture matrix? Am I wrong to assume I can still use the
fixed-function tex gen coords with a shader?
Texture coordinate generation is done by the Vertex stage, so as soon as
you start using a vertex shader you need to do tex coord generation for
your shadow texture unit too. Check the vertex shaders in
src/osgShadow/StandardShadowMap.cpp for guidance.
I noticed you said you replaced the OSG shader with your own. Do you happen to
know what happens when you stop using an uber-shader to render everything in
your scene. My scene has many shaders in the graph. To me it seems like some
data might be getting overridden down the traversal of the scene.
If you use different shaders on different nodes, you need to do shadow
texgen computation (vertex shader) and shadow application (fragment
shader) in all of them. You can easily factor out those functions into
small shader files that you will include everywhere you use your own
shaders. That's what the shaders in StandardShadowMap.cpp do - the main
shader declares a DynamicShadow() function and calls it, and the shadow
shader defines that function. You can do the same, just write your own
main shader, declaring the DynamicShadow() function and calling it, and
include the same shadow shader (with the code of DynamicShadow()) in all
of them.
Hope this helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay jean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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