LOD visibility culling and occluder synthesis

LOD visibility culling and occluder synthesis

Level-of-detail occlusion culling is a novel approach to the management of occluders that can be easily integrated into most current visibility culling algorithms. The main contribution of this paper is an algorithm that automatically generates sets of densely overlapping boxes with enhanced occlusion properties from non-convex subsets. We call this method occluder synthesis because it is not s...

Visibility Culling

One of the most important problems in computer graphics is the classification of all objects in a scene as either being at least partially visible or totally invisible. The issue of rapidly identifying entirely invisible objects is of importance in any rendering system, but it is especially crucial when interactive frame update rates are desired. In an ideal rendering system it would be possibl...

Hardware-driven visibility culling

Exact From-Region Visibility Culling

To pre-process a scene for the purpose of visibility culling during walkthroughs it is necessary to solve visibility from all the elements of a finite partition of viewpoint space. Many conservative and approximate solutions have been developed that solve for visibility rapidly. The idealised exact solution for general 3D scenes has often been regarded as computationally intractable. Our exact ...

Occlusion Culling Using Minimum Occluder Set and Opacity Map

The aim of occlusion culling is to cull away a significant amount of invisible primitives at different viewpoints. We present two algorithms to improve occlusion culling for a highly occluded virtual environment. The first algorithm is used in pre-processing stage. It considers the combined gain and cost of occluders to select an optimal set of occluders, called minimum occluder set, for each o...