What are the advantages of using osg-special parameters instead of those
directly in the gl-state?
/Marcus
Andreas Zieringer wrote:
Hi Estee,
I fixed some bugs should work now there is also a new example
testCGShader2.cpp in OpenSG/Source/Contrib/CGChunk
I renamed some parameters following are supported:
OSGProjection
OSGModelViewProjection
OSGTexture
OSGModelView
OSGModelViewI
OSGModelViewIT
Andreas
Hello all,
I read about some special parameters of OpenSG, OSGProjectionMatrix,
OSGViewMatrix, etc. And I want to use it in my Cg program.
Instead using of glstate.matrix.mvp, I want to use OpenSG special
parameters.
So I did belows.
First, I modified "checkOSGParameters" function in OSGCGChunk.cpp file
because I did not call "updateProjectionMatrix" function. (Of course,
I do rebuild and use new library.)
else if(parameter->getName() == "OSGProjectionMatrix")
{
paramtercbfp fp = updateProjectionMatrix;
_osgParametersCallbacks.push_back(fp);
}
And I registered some parameters before the "glutMainLoop" function.
_cgparameter->setUniformParameter("OSGProjectionMatrix", Real32(0.0));
_cgparameter->setUniformParameter("OSGViewMatrix", Real32(0.0));
Then, in my vertex program I added new uniform parameters and used it.
void C7E1v_reflection(float4 position : POSITION,
float2 texCoord : TEXCOORD0,
float3 normal : NORMAL,
out float4 oPosition : POSITION,
out float2 oTexCoord : TEXCOORD0,
out float3 R : TEXCOORD1,
uniform float3 eyePositionW,
uniform float4x4 modelToWorld,
uniform float4x4 OSGProjectionMatrix,
uniform float4x4 OSGViewMatrix)
Instead of using glstate.matrix.mvp, I tried many cases with OpenSG
special parameters like belows.
float4x4 modelViewProj =
transpose(OSGProjectionMatrix)*transpose(OSGViewMatrix); float4x4
modelViewProj = OSGProjectionMatrix*OSGViewMatrix; float4x4
modelViewProj = transpose(OSGViewMatrix); float4x4 modelViewProj =
OSGProjectionMatrix;
But it seems it doesn't work. :(
If there is anybody who tried this already, please tell me what I'm
wrong.
Thank you.
Best regards,
EsteeHS^µéšŠX¬²š'²ŠÞu¼ƒŠÇ(½êÄjÌ‹Š{±2(+jب+kj×
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