jburkardt

GRF_DISPLAY_OPENGL\ Display a GRF Graph Using OpenGL {#grf_display_opengl-display-a-grf-graph-using-opengl align=”center”} ================================

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GRF_DISPLAY_OPENGL is a C++ program which reads a GRF file containing information about an abstract graph and displays a plot using OPENGL.

Usage: {#usage align=”center”}

grf_display_opengl prefix

where

• prefix.grf is the GRF file.

Licensing: {#licensing align=”center”}

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

Languages: {#languages align=”center”}

GRF_DISPLAY_OPENGL is available in a C++ version.

Related Data and Programs: {#related-data-and-programs align=”center”}

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

GRAFFITI, a dataset directory which contains 195 abstract graphs, with adjacency and embedding information, stored in the GRF format.

GRAPH_REPRESENTATION, a data directory of examples of ways of representing abstract mathematical graphs

GRF, a data directory which contains a description of the GRF format and some examples.

GRF_DISPLAY, a MATLAB program which reads a GRF file and displays a plot in the MATLAB graphics window.

GRF_IO, a C++ library which reads or writes a GRF file;

GRF_TO_EPS, a FORTRAN90 program which can make an encapsulated PostScript image of a GRF file.

GRF_TO_XYL, a FORTRAN90 program which converts information describing the adjacency and embedding of an abstract graph from GRF to XYL format.

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

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.

XYL, a data directory which contains some examples of the XYL format for 2D points and lines.

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_DISPLAY_OPENGL, a C++ program which reads XYF information defining points and faces in 2D, and displays an image using OpenGL.

XYL_DISPLAY_OPENGL, a C++ program which reads XYL information defining points and lines in 2D, and displays an image using OpenGL.

Reference: {#reference align=”center”}

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: {#source-code align=”center”}

• grf_display_opengl.cpp, the source code.

Examples and Tests: {#examples-and-tests align=”center”}

COXETER is the Coxeter graph.

• coxeter.grf, is a GRF file defining the Coxeter graph.
• coxeter.png, a PNG image of the plot.

List of Routines: {#list-of-routines align=”center”}

• MAIN is the main program for GRF_DISPLAY_OPENGL.
• CH_EQI is true if two characters are equal, disregarding case.
• CH_TO_DIGIT returns the integer value of a base 10 digit.
• DISPLAY generates the graphics output.
• GRF_DATA_PRINT prints the data of a GRF file.
• GRF_DATA_READ reads the data of a GRF file.
• GRF_HEADER_PRINT prints the header of a GRF file.
• GRF_HEADER_READ reads the header of a GRF file.
• I4VEC_MAX returns the value of the maximum element in an I4VEC.
• I4VEC_MIN returns the value of the minimum element in an I4VEC.
• MYINIT initializes OpenGL state variables dealing with viewing and attributes.
• R8_MAX returns the maximum of two R8.
• R82VEC_MAX returns the maximum value in a R82VEC.
• R82VEC_MIN returns the minimum value in a R82VEC.
• S_CAT concatenates two strings to make a third string.
• S_LEN_TRIM returns the length of a string to the last nonblank.
• S_TO_I4 reads an I4 from a string.
• S_TO_I4VEC reads an I4VEC from a string.
• S_TO_R8 reads an R8 from a string.
• S_TO_R8VEC reads an R8VEC from a string.
• S_WORD_COUNT counts the number of “words” in a string.
• TIMESTAMP prints the current YMDHMS date as a time stamp.
• XYL_DATA_PRINT prints the data of an XYL file.
• XYL_HEADER_PRINT prints the header of an XYL file.

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

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Last revised on 13 January 2009.