#/* # * 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 # * Unpublished-- rights reserved under the copyright laws of the # * United States.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. # */ # #/* # * robot.c # * This program shows how to composite modeling transformations # * to draw translated and rotated hierarchical models. # * Interaction: pressing the s and e keys (shoulder and elbow) # * alters the rotation of the robot arm. # */ require "opengl" require "glut" require "mathn" $shoulder = 0; $elbow = 0; def init GL.ClearColor(0.0, 0.0, 0.0, 0.0); GL.ShadeModel(GL::FLAT); end display = Proc.new { GL.Clear(GL::COLOR_BUFFER_BIT); GL.PushMatrix(); GL.Translate(-1.0, 0.0, 0.0); GL.Rotate($shoulder, 0.0, 0.0, 1.0); GL.Translate(1.0, 0.0, 0.0); GL.PushMatrix(); GL.Scale(2.0, 0.4, 1.0); GLUT.WireCube (1.0); GL.PopMatrix(); GL.Translate(1.0, 0.0, 0.0); GL.Rotate($elbow, 0.0, 0.0, 1.0); GL.Translate(1.0, 0.0, 0.0); GL.PushMatrix(); GL.Scale(2.0, 0.4, 1.0); GLUT.WireCube(1.0); GL.PopMatrix(); GL.PopMatrix(); GLUT.SwapBuffers(); } reshape = Proc.new {|w, h| GL.Viewport(0, 0, w, h); GL.MatrixMode(GL::PROJECTION); GL.LoadIdentity(); GLU.Perspective(65.0, w/ h, 1.0, 20.0); GL.MatrixMode(GL::MODELVIEW); GL.LoadIdentity(); GL.Translate(0.0, 0.0, -5.0); } #/* ARGSUSED1 */ keyboard = Proc.new {|key, x, y| case (key) when 's'[0] $shoulder = ($shoulder + 5) % 360; GLUT.PostRedisplay(); when 'S'[0] $shoulder = ($shoulder - 5) % 360; GLUT.PostRedisplay(); when 'e'[0] $elbow = ($elbow + 5) % 360; GLUT.PostRedisplay(); when 'E'[0] $elbow = ($elbow - 5) % 360; GLUT.PostRedisplay(); when 27 exit(0); end } GLUT.Init GLUT.InitDisplayMode(GLUT::DOUBLE | 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();