Hello everybody,
I try to render an image into a texture using a FrameBufferObject. I used
the code of the /Examples/Simple/fbotexture.cpp example, but I don't
understand how to render the created SimpleStage.
Here is my code:
OSG::ImageRefPtr fboTexImg = OSG::Image::create();
OSG::TextureObjChunkRefPtr fboTex = OSG::TextureObjChunk::create();
OSG::FrameBufferObjectRefPtr fbo = OSG::FrameBufferObject::create();
OSG::TextureBufferRefPtr texBuf = OSG::TextureBuffer::create();
// set up the texture ...
fboTexImg->set(OSG::Image::OSG_RGB_PF, maxWidth, maxHeight);
fboTex->setImage(fboTexImg);
// ... and add it to the texture buffer
texBuf->setTexture(fboTex);
texBuf->setReadBack(true); // ??
// make the fbo render to the texture
fbo->setWidth (maxWidth );
fbo->setHeight(maxHeight);
fbo->setColorAttachment(texBuf, 0);
fbo->editMFDrawBuffers()->clear();
fbo->editMFDrawBuffers()->push_back(GL_COLOR_ATTACHMENT0_EXT);
fbo->setPostProcessOnDeactivate(true);
// ... and add a camera
OSG::TileCameraDecoratorRefPtr camdec =
OSG::TileCameraDecorator::create();
camdec->setFullSize(ResX, ResY);
camdec->setDecoratee(mMgr_->getCamera());
OSG::SimpleStageRefPtr simpleStage = OSG::SimpleStage::create();
simpleStage->setSize( 0, 0, maxWidth, maxHeight );
simpleStage->setCamera( camdec );
simpleStage->setBackground(mMgr_->getWindow()->getPort(0)->getBackground());
simpleStage->setRenderTarget(fbo);
As you see I have the SimpleStage and don't know how to render the whole
thing. A root node with a scene exists.
Thanks for helping
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