当前任务

读入面网格，完成体网格化

读入面网格以及控制它的参数，能够构造一个体网格黑盒

tetgen支持的文件格式

tetgen命令行参数

-p Tetrahedralizes a piecewise linear complex (PLC). 体网格化，网格没有洞

-Y Preserves the input surface mesh (does not modify it).

-r Reconstructs a previously generated mesh.

-q Re nes mesh (to improve mesh quality). 后跟一个半径值，依此在网格上加点。例如:-q1.4 表示半径边长比为1.4，注意没有空格

-R Mesh coarsening (to reduce the mesh elements).

-A Assigns attributes to tetrahedra in di

erent regions.

-a Applies a maximum tetrahedron volume constraint.指定四面体最大体积。例如:-a1.4 表示最大体积为1.4

-m Applies a mesh sizing function.

-i Inserts a list of additional points.

-O Speci es the level of mesh optimization.

-S Speci es maximum number of added points.

-T Sets a tolerance for coplanar test (default 10- 8).

-X Suppresses use of exact arithmetic.

-M No merge of coplanar facets or very close vertices.

-w Generates weighted Delaunay (regular) triangulation.

-c Retains the convex hull of the PLC.生成凸包的体网格，此时网格可以有洞

-d Detects self-intersections of facets of the PLC.

-z Numbers all output items starting from zero.

-f Outputs all faces to.face le.

-e Outputs all edges to.edge le.

-n Outputs tetrahedra neighbors to.neigh le.

-v Outputs Voronoi diagram to les.

-g Outputs mesh to.mesh le for viewing byMedit.

-k Outputs mesh to.vtk le for viewing byParaview.

-J No jettison of unused vertices from output.node le.

-B Suppresses output of boundary information.

-N Suppresses output of.node le.

-E Suppresses output of.ele le.

-F Suppresses output of.faceand.edge le.

-I Suppresses mesh iteration numbers.

-C Checks the consistency of the nal mesh.

-Q Quiet: No terminal output except errors.

-V Verbose: Detailed information, more terminal output.

-h Help: A brief instruction for using TetGen

实际效果

tetgen -p -q1.1 -a0.1  tshape.off                                tetgen -p -q1.07 -a0.1  tshape.off

q对网格质量的影响

12月5日