Hi all, I'm experimenting with slave cameras for a while now and now I'm totally stuck. I'm doing a tiled display of a scene and for the main scene graph it works fine with projection offset matrix on the slave cameras and all cameras having a RELATIVE reference frame. But my scene also has cameras with ABSOLUTE reference frame (i.e. a background image). The background is - of course - fully mapped on each tile.
In order to solve this I modified my vertex shader like that: gl_Position=osg_ModelViewProjectionMatrix*projectionOffsetMatrix*osg_Vertex; and I populate the projection offset matrix via uniform (same as slave offset matrix). Unfortunately without the expected success. For creation of osg_ModelViewPrtojectionMatrix I found this code: osg::Matrixd modelViewProjectionMatrix = modelMatrix * viewMatrix * _camera->getProjectionMatrix(); uniform->set(modelViewProjectionMatrix); And in the updateSlaveImplementatiuon I see: _camera->setProjectionMatrix(view.getCamera()->getProjectionMatrix() * _projectionOffset); So where is my mistake? It should be obvious but it seems I'm blind here. Many thanks - Werner -
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