Hi Terry, On 3 May 2015 at 07:11, Terry Welsh <[email protected]> wrote: > A couple questions about OSG exposing specific VBO features: > > Looking at the body of DrawElementsUInt::draw(), it appears the size > of its base std::vector is directly used for the elements count. I'm > doing dynamic geometry and usually want to draw fewer elements. Is > there a way to do this with OSG's API?
The core OSG doesn't support this, you could subclass from DrawElements to implement a custom apply method that has a user defined number of elements. > Right now I'm using Geometry::setVertexArray() and > Geometry::setNormalArray(), but I'd like to see if I can get better > performance from an interleaved array. Is there a way to do this? > Perhaps some example code somewhere? Again the core OSG doesn't support it, so you'd need to subclass from osg::Drawable and implement the OpenGL calls for the interleaved array. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
