TRIANGULATION_DISPLAY_OPENGL
Display a Triangulation Using OpenGL {#triangulation_display_opengl-display-a-triangulation-using-opengl align="center"}
TRIANGULATION_DISPLAY_OPENGL is a C++ program which reads the name of two data files defining a triangulation, reads the data, and displays the triangulation using OpenGL.
The files defining the triangulation consist of one file containing the coordinates of the points, and a second file that lists the indices of the nodes making up each triangle. Either 3-node or 6-node triangles may be used.
triangulation_display_opengl prefix
where prefix is the common filename prefix:
- prefix_nodes.txt contains the node coordinates,
- prefix_elements.txt contains the element definitions.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
TRIANGULATION_DISPLAY_OPENGL is available in a C++ version.
CAUSTIC_OPENGL, a C++ program which computes a caustic curve and displays it using OpenGL.
FEM_BASIS_T3_DISPLAY, a MATLAB program which displays a basis function associated with a linear triangle ("T3") mesh.
FEM_BASIS_T6_DISPLAY, a MATLAB program which reads a quadratic triangle mesh and displays any associated basis function.
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 simulates a version of John Conway's "Game of Life", displaying the results using OpenGL.
LIGHTS_OUT_OPENGL, a C++ program which sets up a "Lights Out" game and allows the user to solve it, using the OpenGL graphics window.
LISSAJOUS_OPENGL, a C++ program which computes a Lissajous figure and displays it using OpenGL.
MESH_DISPLAY_OPENGL, a C++ program which reads data defining a polygonal mesh and displays it using OpenGL.
OPENGL, C++ programs which illustrate the use of the OpenGL graphics library;
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, a format which is used for the input files to TRIANGULATION_DISPLAY_OPENGL.
TABLE_DELAUNAY, a C++ program which computes the Delaunay triangulation of a set of points.
TABLE_IO, a C++ library which supplies the routines used to read the TABLE file.
TABLE_VORONOI, a C++ program which computes information about the Voronoi diagram of the points.
TRIANGULATION_DISPLAY, a MATLAB program which displays the nodes and elements of a triangulation on the MATLAB graphics screen;
TRIANGULATION_HISTOGRAM, a C++ program which computes histograms of data over a triangulation.
TRIANGULATION_MASK, a C++ program which takes an existing triangulation and deletes triangles and their corresponding nodes as requested by the user.
TRIANGULATION_NODE_TO_ELEMENT, a C++ program which reads files describing a set of nodes, their triangulation, and the value of one or more quantities at each node, and outputs a file that averages the quantities for each element. This operation in effect creates an "order1" finite element model of the data.
TRIANGULATION_ORDER3, a data directory which contains a description and examples of order 3 triangulations.
TRIANGULATION_ORDER6, a data directory which contains a description and examples of order 6 triangulations.
TRIANGULATION_PLOT, a C++ program which reads data defining a triangulation and creates a PostScript image of the nodes and triangles.
TRIANGULATION_QUAD, a C++ program which estimates the integral of a function over a triangulated region.
XY_DISPLAY_OPENGL, a C++ program which reads an XY file of 2D point coordinates, and displays an image of those points using OpenGL.
XYL_DISPLAY_OPENGL, a C++ program which reads XYL information defining points and lines in 2D, and displays an image using OpenGL.
XYZ_DISPLAY_OPENGL, a C++ program which reads an XYZ file of 3D point coordinates, and displays an image of those points using OpenGL.
- Edward Angel,
Interactive Computer Graphics, a Top-Down Approach with OpenGL,
Addison-Wesley, 2000,
ISBN: 0-201-38597-X,
LC: T385.A514. - Renate Kempf, Chris Frazier, editors,
OpenGL Reference Manual,
Addison-Wesley, 1997,
LC: T385.O642. - Mason Woo, Jackie Neider, Tom Davis,
OpenGL Programming Guide,
Addison-Wesley, 1997,
LC: T385.N435. - Richard Wright, Michael Sweet,
OpenGL Superbible,
Waite Group Press, 1996,
LC: T385.W73. - http://www.opengl.org/
The official OpenGL site.
- triangulation_display_opengl.cpp, the source code.
ELL3 is an L-shaped region, which may be triangulated by order-3 triangles.
-
ell3_output.txt, the printed output in response to the command:
triangulation_display_opengl ell_nodes.txt ell_tri3.txt -
ell3_nodes.txt, 21 nodes in an L-shaped region.
-
ell3_elements.txt, an order-3 triangulation of the nodes.
ELL6 is an L-shaped region, which may be triangulated by order-6 triangles.
-
ell6_output.txt, the printed output in response to the command:
triangulation_display_opengl ell_nodes.txt ell_tri6.txt -
ell6_nodes.txt, 21 nodes in an L-shaped region.
-
ell6_elements.txt, an order-6 triangulation of the nodes.
- MAIN is the main program for TRIANGULATION_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.
- FILE_COLUMN_COUNT counts the number of columns in the first line of a file.
- FILE_ROW_COUNT counts the number of row records in a file.
- I4_MAX returns the maximum of two I4's.
- I4_MIN returns the smaller of two I4's.
- I4MAT_DATA_READ reads data from an I4MAT file.
- I4MAT_HEADER_READ reads the header from an I4MAT file.
- MYINIT initializes OpenGL state variables dealing with viewing and attributes.
- R8_MAX returns the maximum of two R8's.
- R82VEC_MAX returns the maximum value in a R82VEC.
- R82VEC_MIN returns the minimum value in a R82VEC.
- R8MAT_DATA_READ reads the data from an R8MAT file.
- R8MAT_HEADER_READ reads the header from an R8MAT file.
- 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.
You can go up one level to the C++ source codes.
Last revised on 03 October 2009.