Image-based methods of terrain rendering.

摘要

Terrains are often seen in many graphics applications which require interactive walkthroughs. While very common, they can be difficult to render at interactive rates, since they may be composed of millions of polygons. This thesis presents an image-based method of rendering terrains that produces detailed impostors which can be drawn at constant frame rates, independent of the number of triangles in the terrain. A spectrum of image-based rendering methods is discussed, and four methods are implemented with increasing success. image quality is examined, and timing results of an interactive fly-by over the final terrain impostor are compared with a fly-by over the original terrain geometry.