Try cloning the geoms and only changing their color array. Brian
This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. • [EMAIL PROTECTED] wrote: ----- To: osg-users <[email protected]> From: "Sean Spicer" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] Date: 12/01/2008 05:35PM Subject: [osg-users] VBOs & Shared Geometry 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 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
