triangle, a C++ code which can compute properties of a triangle, including angles, area, centroid, circumcircle, edge lengths, incircle, orientation, orthocenter, and quality.
These properties include:
The information on this web page is distributed under the MIT license.
triangle 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.
ellipse, a C++ code which carries out geometric calculations for ellipses and ellipsoids, including area, distance to a point, eccentricity, perimeter, points along the perimeter, random sampling, conversion between standard and quadratic forms.
geometry, a C++ code which performs geometric calculations in 2, 3 and N dimensional space.
hypersphere, a C++ code 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 C++ code 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 C++ code which computes properties including the centroid, circumsphere, dihedral angles, edge lengths, face angles, face areas, insphere, quality, solid angles, and volume of a tetrahedron in 3D.
triangle_analyze, a C++ code which reads a triangle from a file, and then reports various properties.
triangle_interpolate, a C++ code which shows how vertex data can be interpolated at any point in the interior of a triangle.
triangles, a dataset directory which contains examples of triangles;