triangle_analyze, a FORTRAN90 code which reads a triangle defined in a file, and uses the TRIANGLE_PROPERTIES library to compute angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality.


triangle_analyze filename
where filename contains the vertex coordinates.


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


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

Related Data and Programs:

GEOMETRY, a FORTRAN90 code which performs geometric calculations in 2, 3 and N dimensional space.


TRIANGLE_INTERPOLATE, a FORTRAN90 code which shows how vertex data can be interpolated at any point in the interior of a triangle.

TRIANGLE_PROPERTIES, a FORTRAN90 code which computes properties of triangles.

Source Code:

Last revised on 08 September 2020.