Hi JP,
2009/8/19 J.P. Delport <jpdelp...@csir.co.za> > Hi Adrian, > > mmm, I'm not sure about the > > setRenderTargetImplementation(osg::Camera::PIXEL_BUFFER_RTT) > > Do you need to use this? > FBO is also ok. > > I've only used float render targets with FBOs and I know they work without > special contexts. > > ITO quality I suppose you mean you want to find out if actual float values > end up in the texture? If so, you can read back an image and print values > out. Select values that cannot be represented in bytes, e.g. 1e-12 or > negative values and see if they come out OK. > > There is a path in osgmultiplerendertargets that does this. Look at the > code for the options --image and --hdr. > > You could also experiment with other formats specific to NVidia, on my > laptop e.g. 32F_ARB does not work, but the others do. From the example: > > // Default HDR format > textureRect[i]->setInternalFormat(GL_RGBA32F_ARB); > > // GL_FLOAT_RGBA32_NV might be supported on pre 8-series GPUs > //textureRect[i]->setInternalFormat(GL_FLOAT_RGBA32_NV); > > // GL_RGBA16F_ARB can be used with this example, > // but modify e-12 and e12 in the shaders accordingly > //textureRect[i]->setInternalFormat(GL_RGBA16F_ARB); > > i have to play with the different parameters /thanks adrian > > rgds > jp > > > > > Adrian Egli OpenSceneGraph (3D) wrote: > >> Hi all, >> >> How can i test the GL_RGBA32F_ARB render to texture quality. i don't know >> whether i did a mistake in programming or my Nivida quadra fx 570m with >> windows vista driver doesn't support it. >> Or do i have to generate an own graphic context for enabling this feature? >> >> /regards >> adrian >> >> >> // texture >> _RTTInfoPreprocessingBackFront._texture = new osg::Texture2D; >> >> >> _RTTInfoPreprocessingBackFront._texture->setTextureSize(_RTTInfoPreprocessingBackFront._resolution_x, >> _RTTInfoPreprocessingBackFront._resolution_y); >> #ifndef USE_FOR_RTT_FLOAT_IMAGE >> >> _RTTInfoPreprocessingBackFront._texture->setInternalFormat(GL_RGBA); >> #else >> >> _RTTInfoPreprocessingBackFront._texture->setInternalFormat(GL_RGBA32F_ARB); >> _RTTInfoPreprocessingBackFront._texture->setSourceFormat(GL_RGBA); >> _RTTInfoPreprocessingBackFront._texture->setSourceType(GL_FLOAT); >> #endif >> >> >> _RTTInfoPreprocessingBackFront._texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR); >> >> >> _RTTInfoPreprocessingBackFront._texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR); >> >> _RTTInfoPreprocessingBackFront._texture->setResizeNonPowerOfTwoHint(false); >> >> // camera >> _RTTInfoPreprocessingBackFront._camera = new osg::Camera; >> >> >> _RTTInfoPreprocessingBackFront._camera->setClearColor(osg::Vec4(0.0f,0.0f,0.0f,1.0f)); >> >> _RTTInfoPreprocessingBackFront._camera->setClearMask(GL_COLOR_BUFFER_BIT | >> GL_DEPTH_BUFFER_BIT); >> >> >> _RTTInfoPreprocessingBackFront._camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); >> // set viewport >> >> >> _RTTInfoPreprocessingBackFront._camera->setViewport(0,0,_RTTInfoPreprocessingBackFront._resolution_x,_RTTInfoPreprocessingBackFront._resolution_y); >> // set the camera to render before the main camera. >> >> >> _RTTInfoPreprocessingBackFront._camera->setRenderOrder(osg::Camera::PRE_RENDER); >> // tell the camera to use OpenGL frame buffer object where supported. >> >> >> _RTTInfoPreprocessingBackFront._camera->setRenderTargetImplementation(osg::Camera::PIXEL_BUFFER_RTT); >> // image >> _RTTInfoPreprocessingBackFront._image=new osg::Image; >> #ifndef USE_FOR_RTT_FLOAT_IMAGE >> >> >> _RTTInfoPreprocessingBackFront._image->allocateImage(_RTTInfoPreprocessingBackFront._resolution_x, >> _RTTInfoPreprocessingBackFront._resolution_y, 1, GL_RGBA, >> GL_UNSIGNED_BYTE); >> #else >> >> >> _RTTInfoPreprocessingBackFront._image->allocateImage(_RTTInfoPreprocessingBackFront._resolution_x, >> _RTTInfoPreprocessingBackFront._resolution_y, 1, GL_RGBA, GL_FLOAT); >> #endif >> >> >> _RTTInfoPreprocessingBackFront._camera->attach(osg::Camera::BufferComponent(osg::Camera::COLOR_BUFFER), >> _RTTInfoPreprocessingBackFront._image.get(),0,0); >> _RTTInfoPreprocessingBackFront._camera->setPostDrawCallback(new >> WriteCameraPostDrawCallback(_RTTInfoPreprocessingBackFront._image.get(),"RTTInfoPreprocessingBackFront.png",false)); >> >> >> _RTTInfoPreprocessingBackFront._texture->setImage(0,_RTTInfoPreprocessingBackFront._image.get()); >> >> >> -- >> ******************************************** >> Adrian Egli >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > -- > This message is subject to the CSIR's copyright terms and conditions, > e-mail legal notice, and implemented Open Document Format (ODF) standard. > The full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html. > > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. MailScanner thanks Transtec > Computers for their support. > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- ******************************************** Adrian Egli
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