POLYGON_PROPERTIES, a C library which computes properties of an arbitrary polygon in the plane, defined by a sequence of vertices, including
The computer code and data files made available on this web page are distributed under the GNU LGPL license.
POLYGON_PROPERTIES is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.
GEOMETRY, a C library which performs geometric calculations in 2, 3 and N dimensional space.
HYPERSPHERE_PROPERTIES, a C 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_INTEGRALS, a C library which returns the exact value of the integral of any monomial over the interior of a polygon in 2D.
POLYGON_MONTE_CARLO, a C library which applies a Monte Carlo method to estimate the integral of a function over the interior of a polygon in 2D.
POLYGON_TRIANGULATE, a C library which triangulates a possibly nonconvex polygon, and which can use gnuplot to display the external edges and internal diagonals of the triangulation.
TETRAHEDRON_PROPERTIES, a C program which computes properties of a tetrahedron in 3D, including the centroid, circumsphere, dihedral angles, edge lengths, face angles, face areas, insphere, quality, solid angles, and volume.
TRIANGLE_PROPERTIES, a C program which computes properties of a triangle whose vertex coordinates are read from a file.