Hi,
First of all thanks for the great work you've benn doing so far. I'm trying to
build up a post processing setup using osgCompute but I have some problems.
This is how my scene graph looks like:
Computation (Render before children)
|- Camera (Relative, attached MRT textures and using FBO)
||-- Scene
|- Camera (Absolute, Orthogonal 2D Camera)
.|-- Quad Geometry using Target Texture
I'm generating the MRTs and Target textures as follows:
Code:
char MrtName[80];
for(int i = 0; i 4; i++)
{
MRTTexture[i] = new osgCuda::Texture2D;
MRTTexture[i]-setTextureSize(textureWidth, textureHeight);
MRTTexture[i]-setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
MRTTexture[i]-setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
MRTTexture[i]-setInternalFormat(GL_RGBA32F_ARB);
MRTTexture[i]-setSourceFormat(GL_RGBA);
MRTTexture[i]-setSourceType(GL_FLOAT);
sprintf(MrtName, MRT%d, i);
MRTTexture[i]-addIdentifier(MrtName);
}
//Target
*Target = new osgCuda::Texture2D;
(*Target)-setInternalFormat( GL_RGBA32F_ARB );
(*Target)-setSourceFormat( GL_RGBA );
(*Target)-setSourceType( GL_FLOAT );
(*Target)-setTextureWidth( textureWidth );
(*Target)-setTextureHeight( textureHeight );
(*Target)-setFilter(osg::Texture2D::MIN_FILTER,
osg::Texture2D::NEAREST);
(*Target)-setFilter(osg::Texture2D::MAG_FILTER,
osg::Texture2D::NEAREST);
(*Target)-addIdentifier( TARGET );
And this is how I call my kernel:
Code:
virtual void launch()
{
if( isClear() )
return;
swap( _blocks,
_threads,
Target-map(osgCompute::MAP_DEVICE_TARGET),
MRT0-map(osgCompute::MAP_DEVICE_SOURCE),
Target-getPitch(),
MRT0-getPitch(),
Target-getDimension(0),
Target-getDimension(1) );
}
And this is the kernel:
Code:
__global__
void swapKernel( float4* dst, float4* src, unsigned int dstPitch, unsigned int
srcPitch, unsigned int imageWidth, unsigned int imageHeight )
{
// compute thread dimension
unsigned int x = blockIdx.x * blockDim.x + threadIdx.x;
unsigned int y = blockIdx.y * blockDim.y + threadIdx.y;
if( x imageWidth y imageHeight )
{
float4* dstPixel = (float4*)(((char*) dst) + dstPitch * y ) + x;
float4* srcPixel = (float4*)(((char*) src) + srcPitch * y ) + x;
// swap channels
*dstPixel = *srcPixel;
//*dstPixel = make_float4( ((float) x / (float) imageWidth)
,((float) y / (float) imageHeight), 0, 1 );
}
}
I'm sure MRT's are setup correctly since when I attach any of the MRT's to the
Quad I can see the scene.
I'm also sure that kernel is working properly since when I write texture
coordinates to the target I can see them.
However when I try to copy the MRT to the Target I see a black screen.
I couldn't find whats wrong with this setup. Any help would be appreciated.
Thanks in advance!
Cheers,
Serkan[/code]
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=36216#36216
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