The -p switch

  • Reads a Planar Straight Line Graph (.poly) file, which can specify points, segments, holes, regional attributes, and area constraints.
  • Will generate a constrained Delaunay triangulation (CDT) fitting the input; or, if -s, -q, -a, or -u is used, a conforming constrained Delaunay triangulation (CCDT). If -D is used, Triangle generates a conforming Delaunay triangulation, so every triangle is Delaunay.
  • If -r is used with -p, the refined mesh will preserve the segments of the coarse mesh it was generated from.
  • If -p is not used, Triangle reads a .node file by default.
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