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#
# Copyright (c) 1993-1997, Silicon Graphics, Inc.
# ALL RIGHTS RESERVED
# Permission to use, copy, modify, and distribute this software for
# any purpose and without fee is hereby granted, provided that the above
# copyright notice appear in all copies and that both the copyright notice
# and this permission notice appear in supporting documentation, and that
# the name of Silicon Graphics, Inc. not be used in advertising
# or publicity pertaining to distribution of the software without specific,
# written prior permission.
#
#THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
# AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
# INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
# FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
# GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
# SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
# KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
# LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
# THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
# ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
# POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
#
# US Government Users Restricted Rights
# Use, duplication, or disclosure by the Government is subject to
# restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
# (c)(1)(ii) of the Rights in Technical Data and Computer Software
# clause at DFARS 252.227-7013 and/or in similar or successor
# clauses in the FAR or the DOD or NASA FAR Supplement.
# Unpublished-- rights reserved under the copyright laws of the
# United States. Contractor/manufacturer is Silicon Graphics,
# Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
#
# OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
#/
#
# model.c
# This program demonstrates modeling transformations
#/
require "opengl"
require "glut"
require "mathn"
def init
GL.ClearColor(0.0, 0.0, 0.0, 0.0);
GL.ShadeModel(GL::FLAT);
end
def draw_triangle
GL.Begin (GL::LINE_LOOP);
GL.Vertex(0.0, 25.0);
GL.Vertex(25.0, -25.0);
GL.Vertex(-25.0, -25.0);
GL.End();
end
display = Proc.new {
GL.Clear(GL::COLOR_BUFFER_BIT);
GL.Color(1.0, 1.0, 1.0);
GL.LoadIdentity();
GL.Color(1.0, 1.0, 1.0);
draw_triangle();
GL.Enable(GL::LINE_STIPPLE);
GL.LineStipple(1, 0xF0F0);
GL.LoadIdentity();
GL.Translate(-20.0, 0.0, 0.0);
draw_triangle();
GL.LineStipple(1, 0xF00F);
GL.LoadIdentity();
GL.Scale(1.5, 0.5, 1.0);
draw_triangle();
GL.LineStipple(1, 0x8888);
GL.LoadIdentity();
GL.Rotate(90.0, 0.0, 0.0, 1.0);
draw_triangle();
GL.Disable(GL::LINE_STIPPLE);
GL.Flush();
}
reshape = Proc.new { |w, h|
GL.Viewport(0, 0, w, h);
GL.MatrixMode(GL::PROJECTION);
GL.LoadIdentity();
if (w <= h)
GL.Ortho(-50.0, 50.0, -50.0*h/w,
50.0*h/w, -1.0, 1.0);
else
GL.Ortho(-50.0*w/h,
50.0*w/h, -50.0, 50.0, -1.0, 1.0);
end
GL.MatrixMode(GL::MODELVIEW);
}
# ARGSUSED1 */
keyboard = Proc.new {|key, x, y|
case key
when 27
exit(0);
end
}
GLUT.Init
GLUT.InitDisplayMode(GLUT::SINGLE | GLUT::RGB);
GLUT.InitWindowSize(500, 500);
GLUT.InitWindowPosition(100, 100);
GLUT.CreateWindow($0);
init();
GLUT.DisplayFunc(display);
GLUT.ReshapeFunc(reshape);
GLUT.KeyboardFunc(keyboard);
GLUT.MainLoop();
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