Hi,
I am using a texture chunk in the same PolygonForeground field container,
which is rendered to by an FBO (same as in fboxtexture.cpp).
Now, I do not get anything in the non-aspect-0 windows. Colored rendering
works just fine.
How to use FBOs rendering to a texture with several aspects?
Thanks again,
Christoph
OSG::ForegroundUnrecPtr createFBOTex (OSG::Node* root,
OSG::NodeUnrecPtr& stageN)
{
// create FBO
// Background
OSG::SolidBackgroundUnrecPtr bg = OSG::SolidBackground::create();
bg->setColor(OSG::Color3f(0.0,0.0,0.0));
// Begin by setting up an FBO with a TextureBuffer, so we can capture
// and reuse what is being rendered to the FBO.
OSG::ImageRefPtr fboTexImg = OSG::Image ::create();
fboTexImg->set(OSG::Image::OSG_RGB_PF, 1920, 1200);
fboTex = OSG::TextureObjChunk ::create();
fboTex->setImage(fboTexImg);
fboTex->setMinFilter(GL_LINEAR);
fboTex->setMagFilter(GL_LINEAR);
fboTex->setWrapS (GL_CLAMP );
fboTex->setWrapT (GL_CLAMP );
OSG::FrameBufferObjectRefPtr fbo = OSG::FrameBufferObject::create();
OSG::TextureBufferRefPtr texBuf = OSG::TextureBuffer ::create();
OSG::RenderBufferRefPtr depthBuf = OSG::RenderBuffer ::create();
// ... and add it to the texture buffer
texBuf->setTexture(fboTex);
// add a depth attachment, otherwise there is no depth buffer when rendering
to the FBO
depthBuf->setInternalFormat(GL_DEPTH_COMPONENT24);
// make the fbo render to the texture
fbo->setColorAttachment(texBuf, 0);
fbo->setDepthAttachment(depthBuf );
fbo->editMFDrawBuffers()->push_back(GL_COLOR_ATTACHMENT0_EXT);
fbo->setWidth (1920);
fbo->setHeight(1200);
// mipmaps
fbo->setPostProcessOnDeactivate(false);
// Next we set up a Stage, which renders the subtree below it to its render
target (the FBO from above).
OSG::SimpleStageRefPtr stage = OSG::SimpleStage::create();
stageN = OSG::makeNodeFor(stage);
stageN->addChild(root);
// make the stage render to the FBO instead of the normal framebuffer
stage->setRenderTarget(fbo);
// use the full size of the target (this is like setting up the viewport of
the stage)
stage->setSize(0.0f, 0.0f, 1.0f, 1.0f);
stage->setBackground(bg);
stage->setCamera(m_cam);
// create polygon foreground
OSG::TextureEnvChunkUnrecPtr fboTexEnv = OSG::TextureEnvChunk::create();
fboTexEnv->setEnvMode (GL_REPLACE);
OSG::SimpleMaterialUnrecPtr mat = OSG::SimpleMaterial::create();
mat->setDiffuse(OSG::Color3f(1,1,1));
mat->setLit (false);
mat->addChunk (fboTex);
mat->addChunk (fboTexEnv);
OSG::PolygonForegroundUnrecPtr
fgPolygon = OSG::PolygonForeground::create();
fgPolygon->setMaterial (mat);
OSG::MFPnt2f* pPos = fgPolygon->editMFPositions();
OSG::MFVec3f* pTex = fgPolygon->editMFTexCoords();
pPos->push_back(OSG::Pnt2f(0.0f, 0.0f));
pPos->push_back(OSG::Pnt2f(1.0f, 0.0f));
pPos->push_back(OSG::Pnt2f(1.0f, 1.0f));
pPos->push_back(OSG::Pnt2f(0.0f, 1.0f));
pTex->push_back(OSG::Vec3f(0.0f, 0.0f, 0.0f));
pTex->push_back(OSG::Vec3f(1.0f, 0.0f, 0.0f));
pTex->push_back(OSG::Vec3f(1.0f, 1.0f, 0.0f));
pTex->push_back(OSG::Vec3f(0.0f, 1.0f, 0.0f));
return fgPolygon;
}
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