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t17.geo 911 B
// -----------------------------------------------------------------------------
//
// Gmsh GEO tutorial 17
//
// Anisotropic background mesh
//
// -----------------------------------------------------------------------------
// As seen in `t7.geo', mesh sizes can be specified very accurately by providing
// a background mesh, i.e., a post-processing view that contains the target mesh
// sizes.
// Here, the background mesh is represented as a metric tensor field defined on
// a square. One should use bamg as 2d mesh generator to enable anisotropic
// meshes in 2D.
SetFactory("OpenCASCADE");
// Create a square
Rectangle(1) = {-2, -2, 0, 4, 4};
// Merge a post-processing view containing the target anisotropic mesh sizes
Merge "t17_bgmesh.pos";
// Apply the view as the current background mesh
Background Mesh View[0];
// Use bamg
Mesh.SmoothRatio = 3;
Mesh.AnisoMax = 1000;
Mesh.Algorithm = 7;