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life_opengl.html
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<html>
<head>
<title>
LIFE_OPENGL - OpenGL version of "The Game of Life"
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
LIFE_OPENGL <br> OpenGL version of "The Game of Life"
</title>
</h1>
<hr>
<p>
<b>LIFE_OPENGL</b>
is a C++ program which
sets up "The Game of Life" and allows a user to watch as it evolves.
</p>
<p>
The game begins with the user specifying the number of rows and columns,
as well as the wrap around option (1 = wrap around, 0 = no.)
These values can be command line arguments.
</p>
<p>
A grid of gray squares is presented, and the user can set any of the
squares to be "alive" by clicking there. Once the squares have been
initialized, the user can step through the phases of "life", by pressing
return. At any time, the user may change the status of a square by
clicking on it.
</p>
<p>
If the board is 'wrap around', then some information is passed between the
first and last columns, and first and last rows.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>LIFE_OPENGL</b> is available in
<a href = "../../c_src/life_opengl/life_opengl.html">a C version</a> and
<a href = "../../cpp_src/life_opengl/life_opengl.html">a C++ version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/caustic_opengl/caustic_opengl.html">
CAUSTIC_OPENGL</a>,
a C++ program which
computes a caustic curve and displays it using OpenGL.
</p>
<p>
<a href = "../../cpp_src/fern_opengl/fern_opengl.html">
FERN_OPENGL</a>,
a C++ program which
uses OpenGL to display the Barnsley fractal fern.
</p>
<p>
<a href = "../../c_src/flood_opengl/flood_opengl.html">
FLOOD_OPENGL</a>,
a C program which
uses OpenGL to allow the user to select regions of a 2D image
and flood them with color, by Art Wetzel.
</p>
<p>
<a href = "../../c_src/life_opengl/life_opengl.html">
LIFE_OPENGL</a>,
a C program which
uses OpenGL to display the evolution of John Conway's "Game of Life",
by Simon Green.
</p>
<p>
<a href = "../../cpp_src/lissajous_opengl/lissajous_opengl.html">
LISSAJOUS_OPENGL</a>,
a C++ program which
computes a Lissajous figure and displays it using OpenGL.
</p>
<p>
<a href = "../../cpp_src/minesweeper/minesweeper.html">
MINESWEEPER</a>,
a C++ program which
is a text-based implementation of the Minesweeper game.
</p>
<p>
<a href = "../../cpp_src/opengl/opengl.html">
OPENGL</a>,
C++ programs which
illustrate the use of the OpenGL graphics library;
</p>
<p>
<a href = "../../cpp_src/polygonal_surface_display_opengl/polygonal_surface_display_opengl.html">
POLYGONAL_SURFACE_DISPLAY_OPENGL</a>,
a C++ program which
displays a surface in 3D described as a set of polygons, using OpenGL.
</p>
<p>
<a href = "../../cpp_src/rotating_cube_display_opengl/rotating_cube_display_opengl.html">
ROTATING_CUBE_DISPLAY_OPENGL</a>,
a C++ program which
displays a rotating color cube in 3D, using OpenGL;
</p>
<p>
<a href = "../../cpp_src/sphere_xyz_display_opengl/sphere_xyz_display_opengl.html">
SPHERE_XYZ_DISPLAY_OPENGL</a>,
a C++ program which
reads XYZ information defining points in 3D,
and displays a unit sphere and the points, using OpenGL.
</p>
<p>
<a href = "../../m_src/tri_surface_display_opengl/tri_surface_display_opengl.html">
TRI_SURFACE_DISPLAY_OPENGL</a>,
a C++ program which
displays the 3D graphics information
in a TRI_SURFACE file
using OpenGL.
</p>
<p>
<a href = "../../cpp_src/triangulation_display_opengl/triangulation_display_opengl.html">
TRIANGULATION_DISPLAY_OPENGL</a>,
a C++ program which
reads files defining a triangulation and displays an image
using Open GL.
</p>
<p>
<a href = "../../cpp_src/xyf_display_opengl/xyf_display_opengl.html">
XYF_DISPLAY_OPENGL</a>,
a C++ program which
reads XYF information defining points and faces in 2D, and displays
an image using OpenGL.
</p>
<p>
<a href = "../../cpp_src/xyz_display_opengl/xyz_display_opengl.html">
XYZ_DISPLAY_OPENGL</a>,
a C++ program which
reads an XYZ file of 3D point coordinates, and displays
an image of those points using OpenGL.
</p>
<p>
<a href = "../../cpp_src/xyzf_display_opengl/xyzf_display_opengl.html">
XYZF_DISPLAY_OPENGL</a>,
a C++ program which
reads XYZF information defining points and faces in 3D, and displays
an image in a MATLAB graphics window.
</p>
<p>
<a href = "../../cpp_src/xyzl_display_opengl/xyzl_display_opengl.html">
XYZL_DISPLAY_OPENGL</a>,
a C++ program which
reads XYZL information defining points and lines in 3D, and displays
an image in a MATLAB graphics window.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Edward Angel,<br>
Interactive Computer Graphics,
a Top-Down Approach with OpenGL,<br>
Addison-Wesley, 2000,<br>
ISBN: 0-201-38597-X,<br>
LC: T385.A514.
</li>
<li>
Martin Gardner,<br>
Mathematical Games:
The Fantastic Combinations of John Conway's new solitaire game "Life",<br>
Scientific American,<br>
Volume 223, Number 4, October 1970, pages 120-123.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "life_opengl.cpp">life_opengl.cpp</a>, the source code.
</li>
<li>
<a href = "life_opengl.sh">life_opengl.sh</a>,
commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "life_board.png">life_board.png</a>,
a PNG image of an initial 10x10 board after the user
has selected several squares to be alive.
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>MAIN</b> is the main program for LIFE_OPENGL.
</li>
<li>
<b>BOX_DRAW</b> draws one box of the array.
</li>
<li>
<b>DISPLAY</b> generates the graphics output.
</li>
<li>
<b>I4_MAX</b> returns the maximum of two I4's.
</li>
<li>
<b>I4_MIN</b> returns the minimum of two I4's.
</li>
<li>
<b>I4_MODP</b> returns the nonnegative remainder of I4 division.
</li>
<li>
<b>I4_UNIFORM</b> returns a scaled pseudorandom I4.
</li>
<li>
<b>I4_WRAP</b> forces an I4 to lie between given limits by wrapping.
</li>
<li>
<b>MY_INIT</b> initializes OpenGL state variables dealing with viewing and attributes.
</li>
<li>
<b>MY_KEYBOARD</b> reacts to keyboard events.
</li>
<li>
<b>MY_MOUSE</b> reacts to mouse events.
</li>
<li>
<b>R4_ABS</b> returns the absolute value of an R4.
</li>
<li>
<b>R4_NINT</b> returns the nearest integer to an R4.
</li>
<li>
<b>STATE_RANDOMIZE</b> randomizes the state.
</li>
<li>
<b>STATE_RESET</b> allows the user to reset the state of a cell.
</li>
<li>
<b>STATE_UPDATE</b> updates the cell states.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../cpp_src.html">
the C++ source codes</a>.
</p>
<hr>
<i>
Last revised on 24 July 2011.
</i>
<!-- John Burkardt -->
</body>
<!-- Initial HTML skeleton created by HTMLINDEX. -->
</html>