Hi all,
I am trying to render on a FBOViewport using a shader. The texture
attached to that FBO is a GL_TEXTURE_RECTANGLE_ARB and the image format
is RGBA 32 F . What i need is to write a generic floating point value
(not clamped from 0 to 1) in the RGBA channels. A snap of the code is
beginEditCP(_img);
_img->set(OSG::Image::OSG_RGBA_PF, _sizeX, _sizeY, 1, 1,
1, 0, NULL, OSG::Image::OSG_FLOAT32_IMAGEDATA);
endEditCP(_img);
beginEditCP(_texPtr);
_texPtr->setImage(_img);
_texPtr->setInternalFormat(GL_RGBA32F_ARB);
_texPtr->setTarget(GL_TEXTURE_RECTANGLE_ARB);
_texPtr->setMinFilter(GL_NEAREST);
_texPtr->setMagFilter(GL_NEAREST);
_texPtr->setWrapS( GL_CLAMP_TO_EDGE );
_texPtr->setWrapT( GL_CLAMP_TO_EDGE );
endEditCP(_texPtr);
....
f = OSG::FBOViewport::create();
beginEditCP(f);
f->setRoot(_Node);
f->setCamera(_Camera);
f->setBackground(_Background);
f->setParent(getWindowPtr());
f->setStorageWidth(_sizeX);
f->setStorageHeight(_sizeY);
f->setSize(0, 0, _sizeX- 1, _sizeY- 1);
f->setReadBuffer(true);
endEditCP(f);
f->initialize(getWindow());
....
beginEditCP(f);
f->getTextures().push_back(_texPtr); //0
f->getForegrounds().push_back(_polyFG); //the shader
is correctly attached to a polygonForeground
f->setDirty(true);
f->setReadBuffer(true);
f->setFboOn(true);
f->setEnabled(true);
f->activate();
endEditCP(f);
...
f->render(rAct);
I am trying to find a method to understand if the shader has been
corrected executed so, I would like to know if in your opinion:
1) is the previous code correct or i miss something regarding
GL_TEXTURE_RECTANGLE_ARB setup?
2) is there any method to easily view the content of the image attached
to the fbo? I can't use "write" method because of its depth ("Invalid
pixeldepth, cannot store data").
Any clue about?
Thank you very much!
------------------------------------------------------------------------------
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
