www.pudn.com > openglbk.rar > quadric.c

/* 
 * Copyright (c) 1993-1999, 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 * Unpublished-- rights reserved under the copyright laws of the 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. 
 */ 
 
/* 
 *  quadric.c 
 *  This program demonstrates the use of some of the gluQuadric* 
 *  routines. Quadric objects are created with some quadric 
 *  properties and the callback routine to handle errors. 
 *  Note that the cylinder has no top or bottom and the circle 
 *  has a hole in it. 
 */ 
#include  
#include  
#include  
 
#ifndef CALLBACK 
#define CALLBACK 
#endif 
 
GLuint startList; 
 
void CALLBACK errorCallback(GLenum errorCode) 
{ 
   const GLubyte *estring; 
 
   estring = gluErrorString(errorCode); 
   fprintf(stderr, "Quadric Error: %s\n", estring); 
   exit(0); 
} 
 
void init(void)  
{ 
   GLUquadricObj *qobj; 
   GLfloat mat_ambient[] = { 0.5, 0.5, 0.5, 1.0 }; 
   GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 }; 
   GLfloat mat_shininess[] = { 50.0 }; 
   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 }; 
   GLfloat model_ambient[] = { 0.5, 0.5, 0.5, 1.0 }; 
 
   glClearColor(0.0, 0.0, 0.0, 0.0); 
 
   glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient); 
   glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); 
   glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); 
   glLightfv(GL_LIGHT0, GL_POSITION, light_position); 
   glLightModelfv(GL_LIGHT_MODEL_AMBIENT, model_ambient); 
 
   glEnable(GL_LIGHTING); 
   glEnable(GL_LIGHT0); 
   glEnable(GL_DEPTH_TEST); 
 
/*  Create 4 display lists, each with a different quadric object. 
 *  Different drawing styles and surface normal specifications 
 *  are demonstrated. 
 */ 
   startList = glGenLists(4); 
   qobj = gluNewQuadric(); 
   gluQuadricCallback(qobj, GLU_ERROR,  
                      errorCallback); 
 
   gluQuadricDrawStyle(qobj, GLU_FILL); /* smooth shaded */ 
   gluQuadricNormals(qobj, GLU_SMOOTH); 
   glNewList(startList, GL_COMPILE); 
      gluSphere(qobj, 0.75, 15, 10); 
   glEndList(); 
 
   gluQuadricDrawStyle(qobj, GLU_FILL); /* flat shaded */ 
   gluQuadricNormals(qobj, GLU_FLAT); 
   glNewList(startList+1, GL_COMPILE); 
      gluCylinder(qobj, 0.5, 0.3, 1.0, 15, 5); 
   glEndList(); 
 
   gluQuadricDrawStyle(qobj, GLU_LINE); /* all polygons wireframe */ 
   gluQuadricNormals(qobj, GLU_NONE); 
   glNewList(startList+2, GL_COMPILE); 
      gluDisk(qobj, 0.25, 1.0, 20, 4); 
   glEndList(); 
 
   gluQuadricDrawStyle(qobj, GLU_SILHOUETTE); /* boundary only  */ 
   gluQuadricNormals(qobj, GLU_NONE); 
   glNewList(startList+3, GL_COMPILE); 
      gluPartialDisk(qobj, 0.0, 1.0, 20, 4, 0.0, 225.0); 
   glEndList(); 
} 
 
void display(void) 
{ 
   glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
   glPushMatrix(); 
 
   glEnable(GL_LIGHTING); 
   glShadeModel (GL_SMOOTH); 
   glTranslatef(-1.0, -1.0, 0.0); 
   glCallList(startList); 
 
   glShadeModel (GL_FLAT); 
   glTranslatef(0.0, 2.0, 0.0); 
   glPushMatrix(); 
   glRotatef(300.0, 1.0, 0.0, 0.0); 
   glCallList(startList+1); 
   glPopMatrix(); 
 
   glDisable(GL_LIGHTING); 
   glColor3f(0.0, 1.0, 1.0); 
   glTranslatef(2.0, -2.0, 0.0); 
   glCallList(startList+2); 
 
   glColor3f(1.0, 1.0, 0.0); 
   glTranslatef(0.0, 2.0, 0.0); 
   glCallList(startList+3); 
 
   glPopMatrix(); 
   glFlush(); 
} 
 
void reshape (int w, int h) 
{ 
   glViewport(0, 0, (GLsizei) w, (GLsizei) h); 
   glMatrixMode(GL_PROJECTION); 
   glLoadIdentity(); 
   if (w <= h) 
      glOrtho(-2.5, 2.5, -2.5*(GLfloat)h/(GLfloat)w, 
         2.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0); 
   else 
      glOrtho(-2.5*(GLfloat)w/(GLfloat)h, 
         2.5*(GLfloat)w/(GLfloat)h, -2.5, 2.5, -10.0, 10.0); 
   glMatrixMode(GL_MODELVIEW); 
   glLoadIdentity(); 
} 
 
void keyboard(unsigned char key, int x, int y) 
{ 
   switch (key) { 
      case 27: 
         exit(0); 
         break; 
   } 
} 
 
int main(int argc, char** argv) 
{ 
   glutInit(&argc, argv); 
   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); 
   glutInitWindowSize(500, 500);  
   glutInitWindowPosition(100, 100); 
   glutCreateWindow(argv[0]); 
   init(); 
   glutDisplayFunc(display);  
   glutReshapeFunc(reshape); 
   glutKeyboardFunc(keyboard); 
   glutMainLoop(); 
   return 0; 
}