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- /*
- * Copyright 1993, 1996, Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
- * the contents of this file may not be disclosed to third parties, copied or
- * duplicated in any form, in whole or in part, without the prior written
- * permission of Silicon Graphics, Inc.
- *
- * RESTRICTED RIGHTS LEGEND:
- * Use, duplication or disclosure by the Government is subject to restrictions
- * as set forth in subdivision (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, DOD or NASA FAR Supplement. Unpublished -
- * rights reserved under the Copyright Laws of the United States.
- */
-
- /* quadrics.c - demonstrates the use of the quadrics
- * Utility Library routines to draw circles and arcs.
- *
- * Escape key - exit the program
- */
- #include <GL/gl.h>
- #include <GL/glu.h>
- #include <GL/glut.h>
-
- #include <math.h>
- #include <stdio.h>
-
- /* Function Prototypes */
-
- GLvoid initgfx( GLvoid );
- GLvoid drawScene( GLvoid );
- GLvoid reshape( GLsizei, GLsizei );
- GLvoid keyboard( GLubyte, GLint, GLint );
-
- void printHelp( char * );
-
- /* Global Definitions */
-
- #define KEY_ESC 27 /* ascii value for the escape key */
-
- /* Global Variables */
-
- static GLUquadricObj * quadObj;
-
- void
- main( int argc, char *argv[] )
- {
- GLsizei width, height;
-
- glutInit( &argc, argv );
-
- width = glutGet( GLUT_SCREEN_WIDTH );
- height = glutGet( GLUT_SCREEN_HEIGHT );
- glutInitWindowPosition( width/4, height/4 );
- glutInitWindowSize( width/2, height/2 );
- glutInitDisplayMode( GLUT_RGBA );
- glutCreateWindow( argv[0] );
-
- initgfx();
-
- glutKeyboardFunc( keyboard );
- glutReshapeFunc( reshape );
- glutDisplayFunc( drawScene );
-
- printHelp( argv[0] );
-
- glutMainLoop();
- }
-
- GLvoid
- printHelp( char *progname )
- {
- fprintf(stdout, "\n%s - demonstrates how to draw circles and arcs "
- "using quadrics\n\n"
- "Escape key - exit the program\n\n",
- progname
- );
- }
-
- GLvoid
- initgfx( GLvoid )
- {
- glClearColor( 0.0, 0.0, 0.0, 1.0 );
-
- glShadeModel( GL_FLAT );
-
- /* Create a quadric object */
- quadObj = gluNewQuadric ();
- }
-
- GLvoid
- keyboard( GLubyte key, GLint x, GLint y )
- {
- switch (key) {
- case KEY_ESC: /* Exit when the Escape key is pressed */
- exit(0);
- }
- }
-
- GLvoid
- reshape( GLsizei width, GLsizei height )
- {
- GLdouble aspect;
-
- glViewport( 0, 0, width, height );
-
- aspect = (GLdouble) width / (GLdouble) height;
-
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- aspect = (GLdouble) width / (GLdouble) height;
- if (aspect < 1.0)
- glOrtho (0.0, 50.0, 0.0, 50.0*(1.0/aspect), -1.0, 1.0);
- else
- glOrtho (0.0, 50.0*aspect, 0.0, 50.0, -1.0, 1.0);
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- }
-
- GLvoid
- drawScene( GLvoid )
- {
- glClear( GL_COLOR_BUFFER_BIT );
-
- glPushMatrix();
- gluQuadricDrawStyle (quadObj, GLU_FILL);
- glColor3f (1.0, 1.0, 1.0);
- glTranslatef (10.0, 10.0, 0.0);
- gluDisk (quadObj, 0.0, 5.0, 10, 2);
- glPopMatrix();
-
- glPushMatrix();
- glColor3f (1.0, 1.0, 0.0);
- glTranslatef (20.0, 20.0, 0.0);
- gluPartialDisk (quadObj, 0.0, 5.0, 10, 3, 30.0, 120.0);
- glPopMatrix();
-
- glPushMatrix();
- gluQuadricDrawStyle (quadObj, GLU_SILHOUETTE);
- glColor3f (0.0, 1.0, 1.0);
- glTranslatef (30.0, 30.0, 0.0);
- gluPartialDisk (quadObj, 0.0, 5.0, 10, 3, 135.0, 270.0);
- glPopMatrix();
-
- glPushMatrix();
- gluQuadricDrawStyle (quadObj, GLU_LINE);
- glColor3f (1.0, 0.0, 1.0);
- glTranslatef (40.0, 40.0, 0.0);
- gluDisk (quadObj, 2.0, 5.0, 10, 10);
- glPopMatrix();
-
-
- glFlush();
- }
-