A NEW INTERACTIVE LOD SELECTION ALGORITHM FOR POINT BASED RENDERING

For PBR (Point Based Rendering), the main steps that prominently affect the rendering result are hierarchical data structure, LOD selection method and rendering primitives (triangle, point, surfel[1]). In this paper we generate a hierarchical structure with tight-octree and write it back to a file which only adds the level information to the original file. And we propose a new method to do LOD selection, based on the user interactive information and the precalculated bounding box information. As the sampling data getting tremendous, more than one sampling points will project into a pixel. This brings point based rendering becoming popular. Our implementation has demonstrated the algorithm on huge regular sampling models containing millions of samplings.