Very large and geometrically complex models are common in a number of applications including advanced CAD, 3D scanning and rapid prototyping, geometric data transmission in cooperative systems, etc. Multiresolution models are becoming a powerful tool for handling the high demanding requirements of these applications, as they can automatically support adaptive approximations of the geometric objects depending on their relative importance or planned use. Progress in multiresolution models is documented in the literature and demonstrated in innovative commercial products. However, multiresolution-based algorithms are still restricted by many unresolved problems that require further research and usable results. Efficient data structures for handling multiresolution models are essential in CAD of very complex systems and assemblies and for their interactive local editing.
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