I have a point cloud that can be thought of as tiled, as the user zooms in I dynamically add more data to the scene.
I currently have a grid of SPS (could also be PCS) and as the camera (ArcRotateCamera) radius decreases I change the LOD dynamically and add data to each of SPS objects by hooking into useBeforeRender. That works quite well.
However how do I calculate which cells of the grid are in the current view, I know it is trig but is there an example with rays or a convenience function I should be calling?
This is essentially an octree problem, a single PCS or SPS where the points are updated dynamically depending on the view and LOD, is this something I can hook into at the octree level?