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Diffstat (limited to 'progs/redbook/feedback.c')
-rw-r--r-- | progs/redbook/feedback.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/progs/redbook/feedback.c b/progs/redbook/feedback.c deleted file mode 100644 index 3c8c8cc7ea..0000000000 --- a/progs/redbook/feedback.c +++ /dev/null @@ -1,173 +0,0 @@ -/* - * Copyright (c) 1993-1997, 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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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. - */ - -/* - * feedback.c - * This program demonstrates use of OpenGL feedback. First, - * a lighting environment is set up and a few lines are drawn. - * Then feedback mode is entered, and the same lines are - * drawn. The results in the feedback buffer are printed. - */ -#include <GL/glut.h> -#include <stdlib.h> -#include <stdio.h> - -/* Initialize lighting. - */ -static void init(void) -{ - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); -} - -/* Draw a few lines and two points, one of which will - * be clipped. If in feedback mode, a passthrough token - * is issued between the each primitive. - */ -static void drawGeometry (GLenum mode) -{ - glBegin (GL_LINE_STRIP); - glNormal3f (0.0, 0.0, 1.0); - glVertex3f (30.0, 30.0, 0.0); - glVertex3f (50.0, 60.0, 0.0); - glVertex3f (70.0, 40.0, 0.0); - glEnd (); - if (mode == GL_FEEDBACK) - glPassThrough (1.0); - glBegin (GL_POINTS); - glVertex3f (-100.0, -100.0, -100.0); /* will be clipped */ - glEnd (); - if (mode == GL_FEEDBACK) - glPassThrough (2.0); - glBegin (GL_POINTS); - glNormal3f (0.0, 0.0, 1.0); - glVertex3f (50.0, 50.0, 0.0); - glEnd (); -} - -/* Write contents of one vertex to stdout. */ -static void print3DcolorVertex (GLint size, GLint *count, - GLfloat *buffer) -{ - int i; - - printf (" "); - for (i = 0; i < 7; i++) { - printf ("%4.2f ", buffer[size-(*count)]); - *count = *count - 1; - } - printf ("\n"); -} - -/* Write contents of entire buffer. (Parse tokens!) */ -static void printBuffer(GLint size, GLfloat *buffer) -{ - GLint count; - GLfloat token; - - count = size; - while (count) { - token = buffer[size-count]; count--; - if (token == GL_PASS_THROUGH_TOKEN) { - printf ("GL_PASS_THROUGH_TOKEN\n"); - printf (" %4.2f\n", buffer[size-count]); - count--; - } - else if (token == GL_POINT_TOKEN) { - printf ("GL_POINT_TOKEN\n"); - print3DcolorVertex (size, &count, buffer); - } - else if (token == GL_LINE_TOKEN) { - printf ("GL_LINE_TOKEN\n"); - print3DcolorVertex (size, &count, buffer); - print3DcolorVertex (size, &count, buffer); - } - else if (token == GL_LINE_RESET_TOKEN) { - printf ("GL_LINE_RESET_TOKEN\n"); - print3DcolorVertex (size, &count, buffer); - print3DcolorVertex (size, &count, buffer); - } - } -} - -static void display(void) -{ - GLfloat feedBuffer[1024]; - GLint size; - - glMatrixMode (GL_PROJECTION); - glLoadIdentity (); - glOrtho (0.0, 100.0, 0.0, 100.0, 0.0, 1.0); - - glClearColor (0.0, 0.0, 0.0, 0.0); - glClear(GL_COLOR_BUFFER_BIT); - drawGeometry (GL_RENDER); - - glFeedbackBuffer (1024, GL_3D_COLOR, feedBuffer); - (void) glRenderMode (GL_FEEDBACK); - drawGeometry (GL_FEEDBACK); - - size = glRenderMode (GL_RENDER); - printBuffer (size, feedBuffer); - - glFinish(); -} - -/* ARGSUSED1 */ -static void keyboard(unsigned char key, int x, int y) -{ - switch (key) { - case 27: - exit(0); - break; - } -} - -/* Main Loop */ -int main(int argc, char** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); - glutInitWindowSize (100, 100); - glutInitWindowPosition (100, 100); - glutCreateWindow(argv[0]); - init(); - glutDisplayFunc(display); - glutKeyboardFunc (keyboard); - glutMainLoop(); - return 0; -} |