Method and system for view-dependent refinement of progressive meshes

摘要

A method and system for adaptively refining an arbitrary progressive mesh representation for a graphical geometric model according to changing view parameters is presented. The method uses efficient selective refinement criteria for view-dependent parameters based on the view frustum, surface orientation, and screen-space geometric error to produce graphical objects and images such as a graphical terrain. A real- time method for incrementally refining and coarsening the mesh according to the selective refinement criteria is also presented. The real-time method exploits graphical view coherence, and supports frame rate regulation. For continuous motions, the real- time method can be amortized over consecutive frames, and smooth visual transitions (geomorphs) can be constructed between any two adaptively refined meshes used to represent a graphical object or image.