triangle_io

triangle_io, a MATLAB code which can read or write some simple versions of some of the files used by Jonathan Shewchuk's triangle() program.

Licensing:

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

Languages:

triangle_io is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

fem_to_triangle, a MATLAB code which reads fem files defining a 2d mesh of triangles, namely a file of node coordinates and a file of elements defined by node indices, and creates a corresponding pair of node and element files for use by jonathan shewchuk's triangle program.

poly, a data directory which contains a description and examples of the poly file format.

triangle_display, a MATLAB code which displays the nodes and elements of a triangulation on the MATLAB graphics screen, assuming the data has been stored in node and ele files by the triangle program.

triangle_files, a data directory of examples of files used by the triangle and showme programs.

triangle_io_test

triangle_to_fem, a MATLAB code which reads the node and ele files created by triangle() to describe a triangular mesh, and writes two simple "mesh" format files, listing node coordinates and element connectivity.

triangle_to_xml, a MATLAB code which reads the node and ele files created by triangle() to describe a triangular mesh in 2d, and writes out a corresponding xml mesh file for use by dolfin or fenics.

Source Code:

• i4mat_transpose_print.m, prints an I4MAT, transposed.
• i4mat_transpose_print_some.m, prints some of the transpose of an I4MAT.
• r8mat_transpose_print.m, prints an R8MAT, transposed.
• r8mat_transpose_print_some.m, prints some of an R8MAT, transposed.
• s_len_trim.m, returns the length of a string to the last nonblank.
• triangle_element_data_example.m, returns the element information for the example.
• triangle_element_data_read.m, reads the data from an element file.
• triangle_element_size_example.m, returns the element size information for the example.
• triangle_element_size_read.m, reads the header information from an element file.
• triangle_element_write.m, writes a TRIANGLE ".ele" file.
• triangle_node_data_example.m, returns the node information for the example.
• triangle_node_data_read.m, reads the data from a node file.
• triangle_node_size_example.m, returns the sizes of node information for the example.
• triangle_node_size_read.m, reads the header information from a node file.
• triangle_node_write.m, writes a TRIANGLE ".node" file.