Current Status of GRUMMP

The current release of GRUMMP is version 0.5.0.^1.1 This version consists of eight executable programs.

• tri generates two-dimensional triangular isotropic unstructured meshes, using a seriously enhanced version of Ruppert's algorithm. Recent work at UBC has extended Ruppert's scheme to allow better user control over cell size and grading [11] and to allow meshing with curved boundaries [1].
• meshopt2d improves existing two-dimensional triangular isotropic unstructured meshes, including performing adaptive refinement based on a user-provided length scale.
• coarsen2d produces a triangular unstructured mesh with approximately twice the local length scale of the input mesh, including directional anisotropic coarsening of quasi-structured parts of the fine mesh.
• tetra generates three-dimensional tetrahedral isotropic unstructured meshes, using Shewchuk's algorithm [16] modified for cell size and grading control [11].
• meshopt3d improves existing three-dimensional tetrahedral isotropic unstructured meshes, using techniques developed by Freitag and Ollivier-Gooch [3]. Just as in 2D, this executable also performs adaptive refinement.
• coarsen3d produces a tetrahedral unstructured mesh with approximately twice the local length scale of the input mesh, including directional anisotropic coarsening of quasi-structured parts of the fine mesh.
• scat2d performs linear interpolation of two-dimensional scattered data.
• scat3d performs linear interpolation of three-dimensional scattered data.

For further information on invoking these programs, including a description of command line arguments, see Chapter 2. For a description of the file formats which GRUMMP executables read and write, see Chapter 3.