关键词: 地质模型, 体图形学, 体素化, 图形处理器, 多目标缓存

Abstract: This paper presents a fast method for voxelization of geological models based on the multiple render target buffers on the graphics processing units. This algorithm performs surface voxelization on the fragment shader using the logical OR operation, and fills the inside voxels in a following full-screen pass. It can correctly handle the holes inside the input models, and makes it possible to get real-time performance for large scale models on common graphics hardware. To alleviate the artifacts caused by adjacent surfaces or small concaves and convexes on the model surfaces, this paper also develops an improvement method using logical exclusive OR operation, which can generate more accurate results more efficiently.

Key words: geological model, volume graphics, voxelization, Graphics Processing Unit（GPU）, Multiple Render Target（MRT）