细分建模（多边形）技术理论_Subdivision.pdf
2021-02-11 评论：1 下载：7
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Subd细分建模（多边形建模）技术不断被引入到机械三维建模软件中，包括Creo，Inventor，UG NX、Solid Edge、Alias、犀牛Rhino，也陆陆续续推出了Subdivision细分建模、自由式建模等技术。Altair Inspire Studio目前是我能看见的，能跟参数化定义，做到比较不错的。
节选段落一：
4
– C2 continuous everywhere elseC co t uous e e y e e e se
52
Catmull-Clark SubdivisionCatmull Clark Subdivision
53
Catmull-Clark SubdivisionCatmull Clark Subdivision
54
Classic Subdivision OperatorsClassic Subdivision Operators
• Classification of subdivision schemes• Classification of subdivision节选段落二：
everywhere elseC co t uous e e y e e e se
60
Doo-Sabin SubdivisionDoo Sabin Subdivision
61
Doo-Sabin SubdivisionDoo Sabin Subdivision
62
Classic Subdivision OperatorsClassic Subdivision Operators
• Classification of subdivision schemes• Classification of subdivision schemes
Primal
Dual
Triangles RectanglesTriangles节选段落三：
• Subdivision scheme can be analyzed by looking
at a local subdivision matrix
73
Local Subdivision MatrixLocal Subdivision Matrix
• Example: Cubic B-SplinesExample: Cubic B-Splines
• Invariant neighborhood size: 5Invariant neighborhood size: 5
74
Analysis of SubdivisionAnalysis of Subdivision
• Analysis
4
– C2 continuous everywhere elseC co t uous e e y e e e se
52
Catmull-Clark SubdivisionCatmull Clark Subdivision
53
Catmull-Clark SubdivisionCatmull Clark Subdivision
54
Classic Subdivision OperatorsClassic Subdivision Operators
• Classification of subdivision schemes• Classification of subdivision节选段落二：
everywhere elseC co t uous e e y e e e se
60
Doo-Sabin SubdivisionDoo Sabin Subdivision
61
Doo-Sabin SubdivisionDoo Sabin Subdivision
62
Classic Subdivision OperatorsClassic Subdivision Operators
• Classification of subdivision schemes• Classification of subdivision schemes
Primal
Dual
Triangles RectanglesTriangles节选段落三：
• Subdivision scheme can be analyzed by looking
at a local subdivision matrix
73
Local Subdivision MatrixLocal Subdivision Matrix
• Example: Cubic B-SplinesExample: Cubic B-Splines
• Invariant neighborhood size: 5Invariant neighborhood size: 5
74
Analysis of SubdivisionAnalysis of Subdivision
• Analysis
