Hello. My task is to have 2 cameras being exactly the same. The first one will render to my window and the second one to texture.
First i tried to create a camera as child to scene data and add the same model as child. So i used the following code: Viewer viewer; Camera* camera = new Camera(*viewer.getCamera(), CopyOp::DEEP_COPY_ALL); ref_ptr<Image> image = new Image(); image->allocateImage(width, height, 1, GL_RGBA, GL_UNSIGNED_BYTE); camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT ); camera->attach(Camera::BufferComponent(Camera::COLOR_BUFFER0), image.get()); camera->setPostDrawCallback(new MyCameraPostDrawCallback(image.get())); The post callback will writes image to file. I couldnt make it work and i have no idea why. All i see in the texture is an empty scene. What more should i do ? After that i decided to use slave camera. I noticed that i had to use 2 different graphics context. But the problem is that i dont want the second window to appear. What configuration should i pass to the second context to not appear any window ? I assume is something based on WindowingSystemInterface but i couldnt find what exactly. Thank you for your time.
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