#/* # * 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 # * Unpublished-- rights reserved under the copyright laws of the # * United States.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. # */ # #/* # * list.c # * This program demonstrates how to make and execute a # * display list. Note that attributes, such as current # * color and matrix, are changed. # */ require "opengl" require "glut" require "mathn" $listName = 0; def init $listName = GL.GenLists(1); GL.NewList($listName, GL::COMPILE); GL.Color(1.0, 0.0, 0.0); # /* current color red */ GL.Begin(GL::TRIANGLES); GL.Vertex(0.0, 0.0); GL.Vertex(1.0, 0.0); GL.Vertex(0.0, 1.0); GL.End(); GL.Translate(1.5, 0.0, 0.0); # /* move position */ GL.EndList(); GL.ShadeModel(GL::FLAT); end def drawLine GL.Begin(GL::LINES); GL.Vertex(0.0, 0.5); GL.Vertex(15.0, 0.5); GL.End(); end display = Proc.new { GL.Clear(GL::COLOR_BUFFER_BIT); GL.Color(0.0, 1.0, 0.0); # /* current color green */ for i in (0..9 ) # /* draw 10 triangles */ GL.CallList($listName); end drawLine(); # /* is this line green? NO! */ # /* where is the line drawn? */ GL.Flush(); } reshape = Proc.new {|w, h| GL.Viewport(0, 0, w, h); GL.MatrixMode(GL::PROJECTION); GL.LoadIdentity(); if (w <= h) GLU.Ortho2D(0.0, 2.0, -0.5 * h/w, 1.5 * h/w); else GLU.Ortho2D(0.0, 2.0 * w/h, -0.5, 1.5); end GL.MatrixMode(GL::MODELVIEW); GL.LoadIdentity(); } # /* ARGSUSED1 */ keyboard = Proc.new {|key, x, y| case (key) when 27 exit(0); end } # /* Main Loop # * Open window with initial window size, title bar, # * RGBA display mode, and handle input events. # */ # int main(int argc, char** argv) # { GLUT.Init GLUT.InitDisplayMode(GLUT::SINGLE | GLUT::RGB); GLUT.InitWindowSize(650, 50); GLUT.CreateWindow($0); init(); GLUT.ReshapeFunc(reshape); GLUT.DisplayFunc(display); GLUT.KeyboardFunc(keyboard); GLUT.MainLoop(); # return 0; #}