Geometry compression method for deformable terrain rendering

We present a geometry compression method for deformable terrain rendering method, which dynamically transmit compressing data to graphic hardware and compute dynamic error metric by GPU. The domain is first tiled and computed into a nested geometric space error map, and tiled data are compressed and sorted by space error during preprocessing. Then data are dynamically transmitted into displaying memory according to rendering demand. At run time, compressed data is decoded by GPU and screen space error is projected from geometric error, and compare with error threshold according to view-point, to select terrain grid points by GPU. At last, triangle strip is constructed by comparing with an order array to render terrain. As data are dynamically transmitted according to rendering demand, our method significantly reduces bandwidth requirements in the rendering of deformable terrain.