Hi,
I have played around a bit with the FragmentShader for ShadowMap.cpp
Instead of using a predefined bias I wanted the shadow to appear exactly
in the currents materials ambient color.
That's what I did:
static const char fragmentShaderSource_withBaseTexture[] =
"uniform sampler2D osgShadow_baseTexture; \n"
"uniform sampler2DShadow osgShadow_shadowTexture; \n"
"uniform vec2 osgShadow_ambientBias; \n"
"\n"
"void main(void) \n"
"{ \n"
" if (!shadow2DProj(osgShadow_shadowTexture,
gl_TexCoord[1])[0] ) { \n"
" gl_FragColor = gl_FrontLightProduct[0].ambient *
texture2D( osgShadow_baseTexture, gl_TexCoord[0].xy ); \n"
" } else { \n"
" gl_FragColor = gl_Color * texture2D(
osgShadow_baseTexture, gl_TexCoord[0].xy ); \n"
" } \n"
"}\n";
This works, and the result is quite good when looking at the object from
the same direction as the light-source.
If I look at it from the other side then at the places where the shadow
is (which is invisible here, as it uses the ambient color) the object is
slightly transparent.
Any clues on this?
Regards,
Andreas
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
