Hi Gang, I'm working on some code where it is desirable to share vertex & normal arrays across multiple drawables (these are osg::Geometry's), *and* to allow each drawable to have its own unique color (BIND_OVERALL). My thinking is that this can be done using VBOs, but I cannot find any good examples of how to do so, particularly with normals...
For example - See the two Questions inline below: Step 1: Create the common Geometry, then: geom->setSupportsDisplayList(false); geom->setUseDisplayList(false); m_vertexBuffer = geom->getOrCreateVertexBufferObject(); m_vertexBuffer->setArray(0,&vertexArray); m_vertexBuffer->setUsage(GL_STATIC_COPY); // QUESTION 1: How to map the normal array? m_vertexBuffer->dirty(); geom->setUseVertexBufferObjects(true); Step 2: Create a second osg::Geometry node, but set its vertex buffer to the first one geom2->setSupportsDisplayList(false); geom2->setUseDisplayList(false); // QUESTION: I want to be able to do geom->setVertexBufferObject(m_vertexBuffer) // But there is no API. Can this be done? geom2->setUseVertexBufferObjects(true); Any help is much appreciated. cheers, sean
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