Hi all,
I would like to render a depth image via FBO with a
current OpenSG 2.0.
Quite a common operation, so can someone post a code fragment for it perhaps?
I have tried the code below so far without success.
Getting the color image works without any problems ..
void computeHeightfieldImage (OSG::Node* root,
OSG::UInt32 x, OSG::UInt32 y,
OSG::NodeUnrecPtr& stageN,
OSG::ImageRefPtr& image)
{
// create FBO
image = OSG::Image::create();
image->set(OSG::Image::OSG_L_PF,
x, y, 1, 1, 1,
0.0,
0,
OSG::Image::OSG_FLOAT32_IMAGEDATA);
OSG::FrameBufferObjectRefPtr fbo = OSG::FrameBufferObject::create();
OSG::RenderBufferRefPtr depthBuf = OSG::RenderBuffer::create();
depthBuf->setImage(image);
depthBuf->setInternalFormat(GL_DEPTH_COMPONENT32);
OSG::RenderBufferRefPtr texBuf = OSG::RenderBuffer::create();
texBuf ->setInternalFormat(GL_RGB);
// make the fbo render to the texture
fbo->setColorAttachment(texBuf, 0);
fbo->setDepthAttachment(depthBuf );
fbo->editMFDrawBuffers()->push_back(GL_COLOR_ATTACHMENT0_EXT);
fbo->setWidth (x);
fbo->setHeight(y);
depthBuf->setReadBack (true);
fbo->setPostProcessOnDeactivate(true);
..
}
Thanks,
Christoph
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