Displaced Subdivision Meshes

M. Hussain, Y. Okada, and K. Niijima (Japan)


Meshes, subdivision, multiresolution, displacement map, geometry compression, irregular connectivity


In various visualization application contexts, shapes are of ten represented by triangular meshes, which are of extreme complexity and their storage, transmission, and rendering is a threat to the available graphics hardware. The dis placed subdivision mesh is an alternative surface represen tation, which because of its regular connectivity and being amenable to multiresolution structure successfully tackles these problems. This surface representation defines a de tailed mesh with a displacement map over a smooth do main surface. The construction of smooth domain surface is the challenging task in this representation. In this pa per we introduce a new method to define smooth domain surface based on 3 subdivision. In our algorithm, we exploit a memory efficient and fast simplification method with simple heuristic that helps preserve the normal space of the original surface and linear sparse system to define optimized control mesh, so it is computationally more effi cient and consumes less memory as compared to the origi nal algorithm by Lee et al.[10] and the resulting surface has more levels of detail due to the specific nature of 3 sub division if a prescribed target complexity of the mesh must not be exceeded. To corroborate our approach, we present the conversion results using several models.

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