Hi all,
I have a very strange problem with my glsl shader and the
setUniformParameter function. I have two shader chunks and every chunk
gets the same parameters and the two fragment shaders are nearly the
same. Here is how I set up the parameters:
// -------->
// first shader chunk
beginEditCP(_shlChunkNVP); {
_shlChunkNVP->readFragmentProgram("shader/particles_nvp.frag");
_shlChunkNVP->setUniformParameter("scale", _fScale);
_shlChunkNVP->setUniformParameter("loga", _bLoga);
if (state == DYNAMIC) {
_shlChunkNVP->setUniformParameter("dynamic", true);
_shlChunkNVP->setUniformParameter("ipVal", _fIpVal);
}
else {
_shlChunkNVP->setUniformParameter("dynamic", false);
_shlChunkNVP->setUniformParameter("ipVal", 0.0f);
}
} endEditCP(_shlChunkNVP);
// second shader chunk
beginEditCP(_shlChunkFBODir); {
_shlChunkFBODir->readFragmentProgram("shader/particles_fbo_dir.frag");
_shlChunkFBODir->setUniformParameter("scale", _fScale);
_shlChunkFBODir->setUniformParameter("loga", _bLoga);
if (state == DYNAMIC) {
_shlChunkFBODir->setUniformParameter("dynamic", true);
_shlChunkFBODir->setUniformParameter("ipVal", _fIpVal);
}
else {
_shlChunkFBODir->setUniformParameter("dynamic", false);
_shlChunkFBODir->setUniformParameter("ipVal", 0.0f);
}
} endEditCP(_shlChunkFBODir);
// <--------
But I get an error while runtime.
WARNING: Unknown parameter 'dynamic'!
and this is for the second chunk and I don't know why. The other
parameters are also correct. And the parameters are marked as uniform in
the shader (these entries are the same in both fragment programs):
// -------->
uniform bool dynamic;
uniform bool loga;
uniform float ipVal;
uniform float scale;
// <--------
The funny thing is, when I change the type from bool to float (in shader
and program), it is the same. When I change the name in both files, it
is the same. I have an ugly workaround, but it would be nice to have it
correctly:
// -------->
if (state == DYNAMIC) {
_shlChunkFBODir->setUniformParameter("params", Vec2f (1.0f,1.0f));
_shlChunkFBODir->setUniformParameter("ipVal", _fIpVal);
}
else {
_shlChunkFBODir->setUniformParameter("params", Vec2f (0.0f,0.0f));
_shlChunkFBODir->setUniformParameter("ipVal", 0.0f);
}
// <--------
and in the shader:
// -------->
uniform vec2 params;
bool dynamic;
void main(void) {
if (params.x == 0) dynamic = false;
else dynamic = true;
...
}
// <--------
I wonder, if anyone has an idea?
regards,
Oliver
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