TRIANGLE_INTERPOLATE
Interpolation on a Triangle

TRIANGLE_INTERPOLATE is a Python library which demonstrates some simple techniques for interpolating data on a triangle.

In the most common case, the value of a quantity is known at the vertices of a triangle, and a reasonable interpolated value is desired at some point p in the interior of that triangle. This can be done by linear interpolation.

Licensing:

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

Languages:

TRIANGLE_INTERPOLATE is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

TRIANGLE_PROPERTIES, a Python library which can compute properties, including angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality, of a triangle in 2D.

Source Code:

• r8mat_print.py, prints an R8MAT.
• r8mat_print_some.py, prints some of an R8MAT.
• r8mat_transpose_write.py writes the transpose of an R8MAT to a file.
• r8vec_print.py, prints an R8VEC.
• r8vec_uniform_01.py returns a unit pseudorandom R8VEC.
• timestamp.py, prints the current YMDHMS date as a timestamp.
• uniform_in_triangle_map1.py maps uniform points into a triangle.
• uniform_in_triangle_map1.txt

Examples and Tests:

• triangle_interpolate_test.py, calls all the tests.
• triangle_interpolate_test.sh, runs all the tests.
• triangle_interpolate_test.txt, output from the sample calling program.

You can go up one level to the Python source codes.