MFEM庫中NURBS網格檔案格式記錄
阿新 • • 發佈：2022-04-20
Straight meshes
MFEM mesh v1.0 # Space dimension: 2 or 3 dimension <dimension> # Mesh elements, e.g. tetrahedrons (4) elements <number of elements> <element attribute> <geometry type> <vertex index 1> ... <vertex index m> ... # Mesh faces/edges on the boundary, e.g. triangles (2) boundary <number of boundary elements> <boundary element attribute> <geometry type> <vertex index 1> ... <vertex index m> ... # Vertex coordinates vertices <number of vertices> <vdim> <coordinate 1> ... <coordinate <vdim>> ...
NURBS mesh，帶孔方板
示意圖：
現在根據模型解析出 網格檔案 的格式，註釋用 # 標識
MFEM NURBS mesh v1.0 # # MFEM Geometry Types (see mesh/geom.hpp): # # SEGMENT = 1 # SQUARE = 3 # CUBE = 5 # # Types of domains for integration rules and reference finite elements: # Geometry::POINT - a point # Geometry::SEGMENT - the interval [0,1] # Geometry::TRIANGLE - triangle with vertices (0,0), (1,0), (0,1) # Geometry::SQUARE - the unit square (0,1)x(0,1) # Geometry::TETRAHEDRON - w/ vert. (0,0,0),(1,0,0),(0,1,0),(0,0,1) # Geometry::CUBE - the unit cube # Geometry::PRISM - w/ vert. (0,0,0),(1,0,0),(0,1,0),(0,0,1),(1,0,1),(0,1,1) # Geometry::PYRAMID - w/ vert. (0,0,0),(1,0,0),(1,1,0),(0,1,0),(0,0,1) dimension 2 elements # 對應 NURBS patch 4 1 3 0 1 5 4 # 1-element attribute 3-geometry type {0 1 5 4}-vertex number 1 3 1 2 6 5 # 1-element attribute 3-square {1 2 6 5}-vertex number 1 3 2 3 7 6 1 3 3 0 4 7 boundary # NURBS 邊界 8 1 1 0 1 # 1-boundary element attribute 1-geometry type {0 1}-vertex number 1 1 1 2 # 1-boundary element attribute 1-segment {1 2}-vertex number 1 1 2 3 1 1 3 0 1 1 5 4 1 1 6 5 1 1 7 6 1 1 4 7 edges 12 0 0 1 # 0-knotvector id {0 1}-vertex number 0 4 5 1 1 2 1 5 6 2 2 3 2 6 7 3 3 0 3 7 4 4 0 4 # 4-knotvector id {0 4}-vertex number 4 1 5 4 2 6 4 3 7 vertices 8 knotvectors 5 2 3 0 0 0 1 1 1 # 2-degree 3-control point number {0 0 0 1 1 1}-knot vector 2 3 0 0 0 1 1 1 2 3 0 0 0 1 1 1 2 3 0 0 0 1 1 1 2 3 0 0 0 1 1 1 weights 1 1 1 1 1 1 1 1 1 0.707106781 1 0.707106781 1 0.707106781 1 0.707106781 1 1 1 1 0.853553391 0.853553391 0.853553391 0.853553391 FiniteElementSpace FiniteElementCollection: NURBS2 VDim: 2 Ordering: 1 0 0 1 0 1 1 0 1 0.358578644 0.358578644 0.641421356 0.358578644 0.641421356 0.641421356 0.358578644 0.641421356 0.5 0 0.5 0.217157288 1 0.5 0.782842712 0.5 0.5 1 0.5 0.782842712 0 0.5 0.217157288 0.5 0.15 0.15 0.85 0.15 0.85 0.85 0.15 0.85 0.5 0.108578644 0.891421356 0.5 0.5 0.891421356 0.108578644 0.5
最後更新於 2022年4月20日 --- 最初發表於 2022年4月20日
原創作者：LitBro
關於作者：知識付費，shit!
本文連結: [https://www.cnblogs.com/LitBro/p/15890829.html]
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