Hi David, You could write a custom subclass of osg::Geometry and override the drawImplementation an do the cull and dispatch of the primitives and instance count for each time the geometry is drawn, but do so in a thread safe way such as my computing all the dynamic data on the fly.
The alternative would be to have two osg::Geometry, once for each view and have a NodeMask for each osg::Geometry and have use a Camera::CullTraversalMask for each view to select the appropriate one for each context. Robert. On 15 November 2017 at 19:06, David Heitbrink <[email protected]> wrote: > Right now I having problems setting unique uniforms and num instances on a > per view basis (camera). > > Right now I am using hardware instancing, with a scene with 1000's of > relatively complex objects, but only a handful of actual models. I was able > to encode index's to textures + position and rotation transforms into a > single texture buffer. > > To do the viewport culling for this I added "proxy" nodes, which are just > osg::group nodes, with a compute bound + cull call backs. The cull call back, > calls back to a class tracking which instances are visible in which view. > Each view has a group attach to it between the camera and the main scene. In > said group, the texture buffer object is attached here. > > The instanced models are further down in the scene graph. I in a draw > callback from camera, I update each models uniform for its offset into the > texture buffer, its instance count, plus texture buffer (transforms + some > options for the fragment shader). All of this works great until I have > multiple cameras. > > Basically I cannot figure out a good way of modifying the instance count + > offset uniform so I get unique values for each camera. Does anyone have some > advice for this? > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=72391#72391 > > > > > > _______________________________________________ > 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
