triangle_analyze, a FORTRAN77 code which computes properties, including angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality, of a triangle in 2D.
These properties include:
triangle_analyze filenamewhere 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 and an Octave version and a Python version.
GEOMETRY, a FORTRAN77 library which performs geometric calculations in 2, 3 and N dimensional space.
HYPERSPHERE, a FORTRAN77 library which carries out various operations for an M-dimensional hypersphere, including converting between Cartesian and spherical coordinates, stereographic projection, sampling the surface of the sphere, and computing the surface area and volume.
POLYGON, a FORTRAN77 library which computes properties of an arbitrary polygon in the plane, defined by a sequence of vertices, including interior angles, area, centroid, containment of a point, convexity, diameter, distance to a point, inradius, lattice area, nearest point in set, outradius, uniform sampling.
TETRAHEDRON, a FORTRAN77 program which computes properties of a given tetrahedron.