DELAUNAY_TREE_2D is a C++ program which reads a file of point coordinates in 2D and produces a PostScript file containing an image of the Delaunay triangulation of the points, by Olivier Devillers.
Warning: A limitation of the program is that it assumes that the user's input coordinates are "reasonable" PostScript coordinates! Reasonable results will be achieved then if both X and Y coordinates are positive and range from 0 to 1000 or so, say. On the other hand, a user whose data is in the unit square will get a PostScript file which actually plots the entire image in a near infinitesimal and useless box! A reasonable fix is to rescale data so that it lies between 0 and 612. (The PostScript coordinates, by default, are in units of 1/72 inch, so 8.5 inches wide = 612.)
It would not be hard to correct the code so that the user can input data with any scaling whatsoever, while the program would (simple) just rescale it, or (better) insert the appropriate PostScript scaling commands in the plot file.
In any case, the program is more interesting for being a fairly clean embodiment of a Delaunay triangulation algorithm, and the author himself suggests that a user might profitably and easily modify the code to write out the information defining the triangulation.
DELAUNAY_TREE_2D is available in a C++ version.
DELAUNAY_LMAP_2D, a FORTRAN90 program which reads in a pointset and a linear map and writes out the Delaunay triangulation for the linearly transformed data.
GEOMPACK, a C++ library which computes the Delaunay triangulation or Voronoi diagram.
STRIPACK, a FORTRAN90 library which can compute the Delaunay triangulation of a set of points on a sphere.
TABLE_DELAUNAY, a C++ program which reads a file of 2d point coordinates and computes the Delaunay triangulation.
TABLE_VORONOI, a C++ program which can compute information about the Voronoi diagram of a set of points stored in a file.
TRIANGULATION_DISPLAY_OPENGL, a C++ program which reads files defining a triangulation and displays an image using Open GL.
TRIPACK, a FORTRAN90 library which can compute the Delaunay triangulation of a set of points.
DEVILLERS_02_01000 is a set of 1000 points.
DIAMOND_02_00009 is a set of 9 points. Unfortunately, the data is scaled to lie in the unit box, so TABLE_SCALE was called to rescale both X and Y to lie between 0 and 612:
You can go up one level to the C++ source codes.