# # 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 # Unpublished-- rights reserved under the copyright laws of the # United States.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. #/ # # planet.c # This program shows how to composite modeling transformations # to draw translated and rotated models. # Interaction: pressing the d and y keys (day and year) # alters the rotation of the planet around the sun. #/ require "opengl" require "glut" require "rational" STDOUT.sync = TRUE $year = 0; $day = 0; def init GL.ClearColor(0.0, 0.0, 0.0, 0.0); GL.ShadeModel(GL::FLAT); end display = Proc.new { GL.Clear(GL::COLOR_BUFFER_BIT); GL.Color(1.0, 1.0, 1.0); GL.PushMatrix(); GLUT.WireSphere(1.0, 20, 16); # draw sun */ GL.Rotate($year, 0.0, 1.0, 0.0); GL.Translate(2.0, 0.0, 0.0); GL.Rotate($day, 0.0, 1.0, 0.0); GLUT.WireSphere(0.2, 10, 8); # draw smaller planet */ GL.PopMatrix(); GLUT.SwapBuffers(); } reshape = Proc.new { |w, h| GL.Viewport(0, 0, w, h); GL.MatrixMode(GL::PROJECTION); GL.LoadIdentity(); GLU.Perspective(60.0, w.to_f/h.to_f, 1.0, 20.0); GL.MatrixMode(GL::MODELVIEW); GL.LoadIdentity(); GLU.LookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); } # ARGSUSED1 */ keyboard = Proc.new {|key, x, y| case (key) when 'd'[0] $day = ($day + 10) % 360; GLUT.PostRedisplay(); when 'D'[0] $day = ($day - 10) % 360; GLUT.PostRedisplay(); when 'y'[0] $year = ($year + 5) % 360; GLUT.PostRedisplay(); when 'Y'[0] $year = ($year - 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();