Ah yes. Vertex attributes. My mistake, that's what I get for speed reading.
Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jason Daly Sent: Wednesday, April 29, 2009 7:21 PM To: [email protected] Subject: Re: [osg-users] how to specify GLSL attribute?? Brett wrote: > Hi, > > Im new to osg.I want to use an attribute float vertextemp; in my > vertex shader.How to give that array to vertex shader. > Assuming you have an osg::Geometry object called "geometry", and an osg::Program called "program", the following code should work: osg::FloatArray * attrib = new osg::FloatArray(); // (Fill attrib with per-vertex attributes) int attrNum = 1; geometry->setVertexAttribArray(attrNum, attrib); geometry->setVertexAttribBinding(attrNum, osg::Geometry::BIND_PER_VERTEX); program->addBindAttribLocation("vertextemp", attrNum); You can set attrNum to any vertex attribute location that's not currently in use. I'd avoid 0, 2, 3, or 8, because certain video drivers may still alias the generic vertex attributes with the traditional ones (vertex coordinates are at 0, normals at 2, colors at 3, texture coordinates at 8). --"J" _______________________________________________ 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
