Display 2D Points and Faces Using OpenGL

XYF_DISPLAY_OPENGL is a C++ program which reads XYF information defining points and faces in 2D, and draws a picture using OPENGL.

The point and face information is stored in a pair of files, called the XYF format. Essentially, the first file stores a list of point coordinates, and the second lists point indices which can be connected to form faces.


xyf_display_opengl prefix


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


XYF_DISPLAY_OPENGL is available in a C++ version.

Related Data and Programs:

BOX_PLOT, a MATLAB program which can color in specified entries of a checkerboard, corresponding to pairs of integer data.

CAUSTIC_OPENGL, a C++ program which computes a caustic curve and displays it using OpenGL.

FERN_OPENGL, a C++ program which uses OpenGL to display the Barnsley fractal fern.

FLOOD_OPENGL, a C program which allows a user to select a region and flood it with color, using OpenGL, by Art Wetzel.

LIFE_OPENGL, a C program which plays John Conway's "Game of Life", using OpenGL to display the results.

LISSAJOUS_OPENGL, a C++ program which computes a Lissajous figure and displays it using OpenGL.

OPENGL, C++ programs which illustrate the use of the OpenGL graphics library;

PLOT_POINTS, a FORTRAN90 program which reads a file of point coordinates and makes a PostScript image of them.

POLYGONAL_SURFACE_DISPLAY_OPENGL, a C++ program which displays a surface in 3D described as a set of polygons, using OpenGL.

ROTATING_CUBE_DISPLAY_OPENGL, a C++ program which displays a rotating color cube in 3D, using OpenGL;

SPHERE_XYZ_DISPLAY_OPENGL, a C++ program which reads XYZ information defining points in 3D, and displays a unit sphere and the points, using OpenGL.

TABLE_DELAUNAY, a FORTRAN90 program which computes the Delaunay triangulation of a set of points.

TABLE_VORONOI, a C++ program which computes information about the Voronoi diagram of the points.

TRIANGULATION_DISPLAY_OPENGL, a C++ program which reads files defining a triangulation and displays an image using Open GL.

XY_DISPLAY_OPENGL, a C++ program which reads an XY file of 2D point coordinates, and displays an image of those points using OpenGL.

XYF, a data directory which contains examples of XYF files, a simple 2D graphics point and face format;

XYL_DISPLAY, a MATLAB program which reads XYL information defining points and lines in 2D, and displays an image in a MATLAB graphics window.


  1. Edward Angel,
    Interactive Computer Graphics, a Top-Down Approach with OpenGL,
    Addison-Wesley, 2000,
    ISBN: 0-201-38597-X,
    LC: T385.A514.
  2. Renate Kempf, Chris Frazier, editors,
    OpenGL Reference Manual,
    Fourth Edition,
    Addison-Wesley, 2004,
    ISBN: 032117383X,
    LC: T385.O642
  3. Mason Woo, Jackie Neider, Tom Davis,
    OpenGL Programming Guide,
    Addison-Wesley, 1997,
    ISBN: 0-201-46138-2,
    LC: T385.N435
  4. Richard Wright, Michael Sweet,
    OpenGL Superbible,
    Third Edition,
    Sams, 2004,
    ISBN: 0672326019,
    LC: T385.W73
  5. http://www.opengl.org/
    The official OpenGL site.

Source Code:

Examples and Tests:

List of Routines:

You can go up one level to the C++ source codes.

Last revised on 07 January 2009.