| Summary: | 碩士 === 中原大學 === 資訊工程研究所 === 98 === Along with computer operational capability day after day under formidable help, The 3D model which is composed of triangles already generally applied in the different domain. However, in order to enable the 3D model to be competent on-line hypothesized solid boundary system to need the immediate developing function, the 3D model must the process which simplifies the mesh. The unimportant part produces the simplified model which because of the detachment model on the retention important contour characteristic but geometry material quantity largely reduces. Passing mesh simplification research emphatically in how in simplified process correct retention contour characteristic, actually neglects the simplified model mesh distributed regularity has the grid scattered in disorder simplification result, causes the simplified model the following application to be restricted.
The present paper after this goal proposed simultaneously considers the contour characteristic retention degree as well as the simplification grid distribution rule degree triangle mesh simplification algorithm. In contour characteristic retention work, for can retain contour of characteristic effectively the pilot model, The present paper by the model surface normal vector difference's analysis, automatic divides into the model surface many smooth superficial regions, and guaranteed that these regions the boundary will fall on the character of surface position. The affiliation surface hives off the technology to be possible from this automatic and the correct extract leaves the pilot model the contour characteristic, and takes in the following simplified process by this characteristic the limiting condition to complete the simplified model the characteristic retention work. Simplifies in the mesh in the process, the present paper has joined the regional mesh relaxation technology effectiveness adjustment simplification grid distributed situation, After letting simplified the mesh besides has the few geometry material, simultaneously has the rule grid distribution.
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