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/opengles/redbook/robot.c

http://ftk.googlecode.com/
C | 126 lines | 76 code | 9 blank | 41 comment | 1 complexity | 513335e1d940f8823f18e2d1148c2eba MD5 | raw file
  1/*
  2 * License Applicability. Except to the extent portions of this file are
  3 * made subject to an alternative license as permitted in the SGI Free
  4 * Software License B, Version 1.1 (the "License"), the contents of this
  5 * file are subject only to the provisions of the License. You may not use
  6 * this file except in compliance with the License. You may obtain a copy
  7 * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  8 * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  9 * 
 10 * http://oss.sgi.com/projects/FreeB
 11 * 
 12 * Note that, as provided in the License, the Software is distributed on an
 13 * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
 14 * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
 15 * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
 16 * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
 17 * 
 18 * Original Code. The Original Code is: OpenGL Sample Implementation,
 19 * Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 20 * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 21 * Copyright in any portions created by third parties is as indicated
 22 * elsewhere herein. All Rights Reserved.
 23 * 
 24 * Additional Notice Provisions: The application programming interfaces
 25 * established by SGI in conjunction with the Original Code are The
 26 * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
 27 * April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
 28 * 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
 29 * Window System(R) (Version 1.3), released October 19, 1998. This software
 30 * was created using the OpenGL(R) version 1.2.1 Sample Implementation
 31 * published by SGI, but has not been independently verified as being
 32 * compliant with the OpenGL(R) version 1.2.1 Specification.
 33 *
 34 */
 35
 36/*
 37 * robot.c
 38 * This program shows how to composite modeling transformations
 39 * to draw translated and rotated hierarchical models.
 40 * Interaction:  pressing the s and e keys (shoulder and elbow)
 41 * alters the rotation of the robot arm.
 42 */
 43#include <stdlib.h>
 44#include "ug.h"
 45
 46static int shoulder = 0, elbow = 0;
 47
 48void init(void) 
 49{
 50   glClearColor (0.0, 0.0, 0.0, 0.0);
 51   glShadeModel (GL_FLAT);
 52}
 53
 54void display(UGWindow uwin)
 55{
 56   glClear (GL_COLOR_BUFFER_BIT);
 57   glPushMatrix();
 58   glTranslatef (-1.0, 0.0, 0.0);
 59   glRotatef ((GLfloat) shoulder, 0.0, 0.0, 1.0);
 60   glTranslatef (1.0, 0.0, 0.0);
 61   glPushMatrix();
 62   glScalef (2.0, 0.4, 1.0);
 63   ugWireCubef(1.0);
 64   glPopMatrix();
 65
 66   glTranslatef (1.0, 0.0, 0.0);
 67   glRotatef ((GLfloat) elbow, 0.0, 0.0, 1.0);
 68   glTranslatef (1.0, 0.0, 0.0);
 69   glPushMatrix();
 70   glScalef (2.0, 0.4, 1.0);
 71   ugWireCubef(1.0);
 72   glPopMatrix();
 73
 74   glPopMatrix();
 75   ugSwapBuffers(uwin);
 76}
 77
 78void reshape (UGWindow uwin, int w, int h)
 79{
 80   glViewport (0, 0, (GLsizei) w, (GLsizei) h); 
 81   glMatrixMode (GL_PROJECTION);
 82   glLoadIdentity ();
 83   ugluPerspectivef(65.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);
 84   glMatrixMode(GL_MODELVIEW);
 85   glLoadIdentity();
 86   glTranslatef (0.0, 0.0, -5.0);
 87}
 88
 89void keyboard (UGWindow uwin, int key, int x, int y)
 90{
 91   switch (key) {
 92      case 's':
 93         shoulder = (shoulder + 5) % 360;
 94         ugPostRedisplay(uwin);
 95         break;
 96      case 'S':
 97         shoulder = (shoulder - 5) % 360;
 98         ugPostRedisplay(uwin);
 99         break;
100      case 'e':
101         elbow = (elbow + 5) % 360;
102         ugPostRedisplay(uwin);
103         break;
104      case 'E':
105         elbow = (elbow - 5) % 360;
106         ugPostRedisplay(uwin);
107         break;
108      case 27:
109         exit(0);
110         break;
111      default:
112         break;
113   }
114}
115
116int main(int argc, char** argv)
117{
118   UGCtx ug = ugInit();
119   UGWindow uwin = ugCreateWindow (ug, "", argv[0], 500, 500, 100, 100);
120   init();
121   ugDisplayFunc(uwin, display); 
122   ugReshapeFunc(uwin, reshape);
123   ugKeyboardFunc(uwin, keyboard);
124   ugMainLoop(ug);
125   return 0;
126}