Hi James, As far as I have seen, GL_ARB_texture_float is about as well-supported as GL_ARB_draw_instanced. The only exception I've been able to find on test hardware has been software Mesa, which supports neither.
We make use of multiple floating point textures for encoding per-instance data. One problem is that those textures require normalised values, so you have to supply your own ranges as uniforms for multiplying them back out in the shaders. To be honest, it's far more of a faff than examples I've seen (ahem) using glVertexAttribDivisor, and I'd far rather use that mechanism if it were supported conveniently inside OpenSceneGraph. Alistair Baxter Software Engineer ________________________________ We'll be exhibiting at PDAC 2014 from booth #1607, 2nd - 5th March 2014. For further information please visit http://www.mve.com/calendar Midland Valley Exploration Ltd. 144 West George Street Glasgow G2 2HG United Kingdom Tel: +44 (0) 141 332 2681 Fax: +44 (0) 141 332 6792 The structural geology experts _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
