POP: A Hybrid Point and Polygon Rendering System for Large Data

Thursday, May 17, 2001 - 4:00pm - 4:30pm
Keller 3-180
Baoquan Chen (University of Minnesota, Twin Cities)
We introduce a simple but important extension to the existing point rendering systems. Rather than using only points, we use both points and polygons to represent and render large meshe models. We start from triangles as leaf nodes and build up a hierarchical tree structure with intermediate nodes as points. During the rendering, the system determines whether to use point (of certain level node) or triangle (leaf node) for display depending on the screen contribution of each node. While points are used to speedup the rendering for distant objects, triangles are used to ensure the quality for close objects. We also perform pre-texturing on points and triangles when we build up the tree. Our hybrid representation facilitates effective antialiasing for texture mapping.