src/redbook/quadric.c

   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  31  * Unpublished-- rights reserved under the copyright laws of the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  *  quadric.c
  40  *  This program demonstrates the use of some of the gluQuadric*
  41  *  routines. Quadric objects are created with some quadric
  42  *  properties and the callback routine to handle errors.
  43  *  Note that the cylinder has no top or bottom and the circle
  44  *  has a hole in it.
  45  */
  46 #include <GL/glut.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49
  50 /* Win32 calling conventions. */
  51 #ifndef CALLBACK
  52 #define CALLBACK
  53 #endif
  54
  55 GLuint startList;
  56
  57 static void CALLBACK errorCallback(GLenum errorCode)
  58 {
  59    const GLubyte *estring;
  60
  61    estring = gluErrorString(errorCode);
  62    fprintf(stderr, "Quadric Error: %s\n", estring);
  63    exit(0);
  64 }
  65
  66 static void init(void)
  67 {
  68    GLUquadricObj *qobj;
  69    GLfloat mat_ambient[] = { 0.5, 0.5, 0.5, 1.0 };
  70    GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
  71    GLfloat mat_shininess[] = { 50.0 };
  72    GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
  73    GLfloat model_ambient[] = { 0.5, 0.5, 0.5, 1.0 };
  74
  75    glClearColor(0.0, 0.0, 0.0, 0.0);
  76
  77    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
  78    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
  79    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
  80    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  81    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, model_ambient);
  82
  83    glEnable(GL_LIGHTING);
  84    glEnable(GL_LIGHT0);
  85    glEnable(GL_DEPTH_TEST);
  86
  87 /*  Create 4 display lists, each with a different quadric object.
  88  *  Different drawing styles and surface normal specifications
  89  *  are demonstrated.
  90  */
  91    startList = glGenLists(4);
  92    qobj = gluNewQuadric();
  93    gluQuadricCallback(qobj, GLU_ERROR,
  94                       (GLvoid (CALLBACK*) ()) errorCallback);
  95
  96    gluQuadricDrawStyle(qobj, GLU_FILL); /* smooth shaded */
  97    gluQuadricNormals(qobj, GLU_SMOOTH);
  98    glNewList(startList, GL_COMPILE);
  99       gluSphere(qobj, 0.75, 15, 10);
 100    glEndList();
 101
 102    gluQuadricDrawStyle(qobj, GLU_FILL); /* flat shaded */
 103    gluQuadricNormals(qobj, GLU_FLAT);
 104    glNewList(startList+1, GL_COMPILE);
 105       gluCylinder(qobj, 0.5, 0.3, 1.0, 15, 5);
 106    glEndList();
 107
 108    gluQuadricDrawStyle(qobj, GLU_LINE); /* all polygons wireframe */
 109    gluQuadricNormals(qobj, GLU_NONE);
 110    glNewList(startList+2, GL_COMPILE);
 111       gluDisk(qobj, 0.25, 1.0, 20, 4);
 112    glEndList();
 113
 114    gluQuadricDrawStyle(qobj, GLU_SILHOUETTE); /* boundary only  */
 115    gluQuadricNormals(qobj, GLU_NONE);
 116    glNewList(startList+3, GL_COMPILE);
 117       gluPartialDisk(qobj, 0.0, 1.0, 20, 4, 0.0, 225.0);
 118    glEndList();
 119
 120    gluDeleteQuadric(qobj);
 121 }
 122
 123 static void display(void)
 124 {
 125    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 126    glPushMatrix();
 127
 128    glEnable(GL_LIGHTING);
 129    glShadeModel (GL_SMOOTH);
 130    glTranslatef(-1.0, -1.0, 0.0);
 131    glCallList(startList);
 132
 133    glShadeModel (GL_FLAT);
 134    glTranslatef(0.0, 2.0, 0.0);
 135    glPushMatrix();
 136    glRotatef(300.0, 1.0, 0.0, 0.0);
 137    glCallList(startList+1);
 138    glPopMatrix();
 139
 140    glDisable(GL_LIGHTING);
 141    glColor3f(0.0, 1.0, 1.0);
 142    glTranslatef(2.0, -2.0, 0.0);
 143    glCallList(startList+2);
 144
 145    glColor3f(1.0, 1.0, 0.0);
 146    glTranslatef(0.0, 2.0, 0.0);
 147    glCallList(startList+3);
 148
 149    glPopMatrix();
 150    glFlush();
 151 }
 152
 153 static void reshape (int w, int h)
 154 {
 155    glViewport(0, 0, (GLsizei) w, (GLsizei) h);
 156    glMatrixMode(GL_PROJECTION);
 157    glLoadIdentity();
 158    if (w <= h)
 159       glOrtho(-2.5, 2.5, -2.5*(GLfloat)h/(GLfloat)w,
 160          2.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0);
 161    else
 162       glOrtho(-2.5*(GLfloat)w/(GLfloat)h,
 163          2.5*(GLfloat)w/(GLfloat)h, -2.5, 2.5, -10.0, 10.0);
 164    glMatrixMode(GL_MODELVIEW);
 165    glLoadIdentity();
 166 }
 167
 168 /* ARGSUSED1 */
 169 static void keyboard(unsigned char key, int x, int y)
 170 {
 171    switch (key) {
 172       case 27:
 173          exit(0);
 174          break;
 175    }
 176 }
 177
 178 int main(int argc, char** argv)
 179 {
 180    glutInit(&argc, argv);
 181    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
 182    glutInitWindowSize(500, 500);
 183    glutInitWindowPosition(100, 100);
 184    glutCreateWindow(argv[0]);
 185    init();
 186    glutDisplayFunc(display);
 187    glutReshapeFunc(reshape);
 188    glutKeyboardFunc(keyboard);
 189    glutMainLoop();
 190    return 0;
 191 }