quad_mesh_rcm

quad_mesh_rcm, a FORTRAN90 code which computes the Reverse Cuthill McKee (RCM) reordering for nodes in a mesh of 4-node quadrilaterals.

The user supplies a node file and an element file, containing the coordinates of the nodes, and the indices of the nodes that make up each element.

The program reads the data, computes the adjacency information, carries out the RCM algorithm to get the permutation, applies the permutation to the nodes and elements, and writes out new node and element files that correspond to the RCM permutation.

Usage:

quad_mesh_rcm 'prefix'

• 'prefix'_nodes.txt, the node coordinates;
• 'prefix'_elements.txt, the element definitions.
• 'prefix'_rcm_nodes.txt, the reordered node coordinates;
• 'prefix'_rcm_elements.txt, the reordered element definitions.

Licensing:

The computer code and data files described and made available on this web page are distributed under the MIT license

Languages:

quad_mesh_rcm is available in a C++ version and a FORTRAN version and a MATLAB version.

Related Data and Programs:

MESH_BANDWIDTH, a FORTRAN90 code which returns the geometric bandwidth associated with a mesh of elements of any order and in a space of arbitrary dimension.

QUAD_MESH, a FORTRAN90 code which handles meshes of quadrilaterals over a 2D region;

quad_mesh_rcm_test

RCM, a FORTRAN90 code which carries out reverse Cuthill-McKee computations.

TET_MESH_RCM, a FORTRAN90 code which applies the reverse Cuthill-McKee reordering to a tetrahedral mesh of nodes in 3D.

TRIANGULATION_RCM, a FORTRAN90 code which reads files describing a triangulation of nodes in 2D, and applies the RCM algorithm to produce a renumbering of the triangulation with a reduced bandwidth.

Reference:

1. HL Crane, Norman Gibbs, William Poole, Paul Stockmeyer,
   Algorithm 508: Matrix Bandwidth and Profile Reduction,
   ACM Transactions on Mathematical Software,
   Volume 2, Number 4, December 1976, pages 375-377.
2. Marc deBerg, Marc Krevald, Mark Overmars, Otfried Schwarzkopf,
   Computational Geometry,
   Springer, 2000,
   ISBN: 3-540-65620-0.
3. Alan George, Joseph Liu,
   Computer Solution of Large Sparse Positive Definite Matrices,
   Prentice Hall, 1981,
   ISBN: 0131652745,
   LC: QA188.G46
4. Norman Gibbs,
   Algorithm 509: A Hybrid Profile Reduction Algorithm,
   ACM Transactions on Mathematical Software,
   Volume 2, Number 4, December 1976, pages 378-387.
5. Norman Gibbs, William Poole, Paul Stockmeyer,
   An Algorithm for Reducing the Bandwidth and Profile of a Sparse Matrix,
   SIAM Journal on Numerical Analysis,
   Volume 13, 1976, pages 236-250.
6. Joseph ORourke,
   Computational Geometry,
   Second Edition,
   Cambridge, 1998,
   ISBN: 0521649765,
   LC: QA448.D38.

Source Code:

• quad_mesh_rcm.f90, the source code.
• quad_mesh_rcm.sh, compiles the source code.

• quad_mesh_rcm_test.sh, runs all the tests.
• quad_mesh_rcm_test.txt, the output file.