Hi, I've got the same picking problem with several mesh (which use vertex displacement or tesselation).
To solve that, I always render my scene in a FBO, with 2 color attachements : - first draw buffer is a regular color texture - second draw buffer is a texture with only 1 channel, in "int" format My shaders always write an "objectId" value in the second buffer. Then I can pick a pixel at anytime. You can also get the 3D world position of the pixel using its window coordinates, its depth value and the camera matrices. This not ideal picking, it consume a lot of GPU memory bandwitdh (but on modern GPUs it's not a problem), but it's easy to setup and for applications which need exact picking it may be the best solution. Cheers, Aurelien ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=56528#56528 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
