public ChemEntity TraceRayInScene(Vector3 rayOrigin, Vector3 rayDir)
{
ChemEntity entity = (ChemEntity)sceneGraph.RayIntersectFirst(rayOrigin, rayDir);
/*if (entity != null)
* {
* AtomSelectionEntity selEntity = new AtomSelectionEntity((AtomEntity)entity);
* selEntity.Init(device);
* postSceneViewEntities.Add(selEntity);
* }*/
/*Ray3D ray = new Ray3D(rayOrigin, rayDir, 20f);
* postSceneWorldEntities.Add(ray);
* ray.Init(device);*/
return(entity);
}