planet.c revision 32001f49 
1/*
2 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
3 * ALL RIGHTS RESERVED
4 * Permission to use, copy, modify, and distribute this software for
5 * any purpose and without fee is hereby granted, provided that the above
6 * copyright notice appear in all copies and that both the copyright notice
7 * and this permission notice appear in supporting documentation, and that
8 * the name of Silicon Graphics, Inc. not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission.
11 *
12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
15 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
16 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 * US Government Users Restricted Rights
26 * Use, duplication, or disclosure by the Government is subject to
27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
29 * clause at DFARS 252.227-7013 and/or in similar or successor
30 * clauses in the FAR or the DOD or NASA FAR Supplement.
31 * Unpublished-- rights reserved under the copyright laws of the
32 * United States.  Contractor/manufacturer is Silicon Graphics,
33 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
34 *
35 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
36 */
37
38/*
39 *  planet.c
40 *  This program shows how to composite modeling transformations
41 *  to draw translated and rotated models.
42 *  Interaction:  pressing the d and y keys (day and year)
43 *  alters the rotation of the planet around the sun.
44 */
45#include "glut_wrap.h"
46#include <stdlib.h>
47
48static int year = 0, day = 0;
49
50static void init(void)
51{
52   glClearColor (0.0, 0.0, 0.0, 0.0);
53   glShadeModel (GL_FLAT);
54}
55
56static void display(void)
57{
58   glClear (GL_COLOR_BUFFER_BIT);
59   glColor3f (1.0, 1.0, 1.0);
60
61   glPushMatrix();
62   glutWireSphere(1.0, 20, 16);   /* draw sun */
63   glRotatef ((GLfloat) year, 0.0, 1.0, 0.0);
64   glTranslatef (2.0, 0.0, 0.0);
65   glRotatef ((GLfloat) day, 0.0, 1.0, 0.0);
66   glutWireSphere(0.2, 10, 8);    /* draw smaller planet */
67   glPopMatrix();
68   glutSwapBuffers();
69}
70
71static void reshape (int w, int h)
72{
73   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
74   glMatrixMode (GL_PROJECTION);
75   glLoadIdentity ();
76   gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);
77   glMatrixMode(GL_MODELVIEW);
78   glLoadIdentity();
79   gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
80}
81
82/* ARGSUSED1 */
83static void keyboard (unsigned char key, int x, int y)
84{
85   switch (key) {
86      case 'd':
87         day = (day + 10) % 360;
88         glutPostRedisplay();
89         break;
90      case 'D':
91         day = (day - 10) % 360;
92         glutPostRedisplay();
93         break;
94      case 'y':
95         year = (year + 5) % 360;
96         glutPostRedisplay();
97         break;
98      case 'Y':
99         year = (year - 5) % 360;
100         glutPostRedisplay();
101         break;
102      case 27:
103         exit(0);
104         break;
105      default:
106         break;
107   }
108}
109
110int main(int argc, char** argv)
111{
112   glutInit(&argc, argv);
113   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
114   glutInitWindowSize (500, 500);
115   glutInitWindowPosition (100, 100);
116   glutCreateWindow (argv[0]);
117   init ();
118   glutDisplayFunc(display);
119   glutReshapeFunc(reshape);
120   glutKeyboardFunc(keyboard);
121   glutMainLoop();
122   return 0;
123}
124