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Title:
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A REPARTITION STRUCTURE FOR COLLISION DETECTION AND DEFORMATION OF DISCRETE OBJECTS BASED ON 3D WAVELETS |
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Author(s):
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Xavier Heurtebise, Sébastien Thon |
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ISBN:
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978-972-8939-22-9 |
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Editors:
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Yingcai Xiao, Tomaz Amon and Piet Kommers |
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Year:
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2010 |
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Edition:
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Single |
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Keywords:
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Virtual sculpture; levels of detail; 3D discrete wavelet transform; collision detection; repartition structure |
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Type:
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Full Paper |
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First Page:
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19 |
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Last Page:
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30 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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In a virtual sculpture project, we would like to sculpt in real-time 3D objects sampled in volume elements (voxels). The drawback of this kind of representation is that a very huge number of voxels is required to represent large and detailed objects. Consequently, the memory cost will be very large and the user/object interaction will be slowed down. We proposed a multiresolution representation of 3D objects thanks to a 3D wavelet transform (Heurtebise et al. 2006), in order to reduce the memory cost and to adapt the processing and display times with a desired level of detail. In order to allow real-time performance during the sculpting process, we propose in this paper a repartition structure, which is an octree whose each node contains maximal and minimal density for each area of the 3D object. Moreover, we combine this structure with a multiresolution collision detection, to accelerate the sculpting process during the addition and subtraction of matter into the 3D object thanks to a tool, both with the same multiresolution representation. |
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