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diff --git a/progs/redbook/polyoff.c b/progs/redbook/polyoff.c
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-/*
- * 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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
-
-/*
- * polyoff.c
- * This program demonstrates polygon offset to draw a shaded
- * polygon and its wireframe counterpart without ugly visual
- * artifacts ("stitching").
- */
-#include <GL/glut.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef GL_VERSION_1_1
-GLuint list;
-GLint fill = 1;
-GLfloat spinx = 0;
-GLfloat spiny = 0;
-GLfloat tdist = 0.0;
-GLfloat polyfactor = 1.0;
-GLfloat polyunits = 1.0;
-GLboolean doubleBuffer;
-
-
-/* display() draws two spheres, one with a gray, diffuse material,
- * the other sphere with a magenta material with a specular highlight.
- */
-static void display (void)
-{
- GLfloat gray[] = { 0.8, 0.8, 0.8, 1.0 };
- GLfloat black[] = { 0.0, 0.0, 0.0, 1.0 };
-
- glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glPushMatrix ();
- glTranslatef (0.0, 0.0, tdist);
- glRotatef ((GLfloat) spinx, 1.0, 0.0, 0.0);
- glRotatef ((GLfloat) spiny, 0.0, 1.0, 0.0);
-
- glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, gray);
- glMaterialfv(GL_FRONT, GL_SPECULAR, black);
- glMaterialf(GL_FRONT, GL_SHININESS, 0.0);
- if (fill) {
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_POLYGON_OFFSET_FILL);
- glPolygonOffset(polyfactor, polyunits);
- glCallList (list);
- glDisable(GL_POLYGON_OFFSET_FILL);
- }
-
- glDisable(GL_LIGHTING);
- glDisable(GL_LIGHT0);
- glColor3f (1.0, 1.0, 1.0);
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- glPolygonOffset(-polyfactor, -polyunits);
- if (!fill) glEnable(GL_POLYGON_OFFSET_LINE);
- glCallList (list);
- glDisable(GL_POLYGON_OFFSET_LINE);
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-
- if (!fill) {
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glCallList (list);
- }
-
- glPopMatrix ();
- glFlush ();
- if (doubleBuffer) glutSwapBuffers();
-}
-
-/* specify initial properties
- * create display list with sphere
- * initialize lighting and depth buffer
- */
-static void gfxinit (void)
-{
- GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
- GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
- GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
- GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
-
- GLfloat global_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
-
- glClearColor (0.0, 0.0, 0.0, 1.0);
-
- list = glGenLists(1);
- glNewList (list, GL_COMPILE);
- glutSolidSphere(1.0, 20, 12);
- glEndList ();
-
- glEnable(GL_DEPTH_TEST);
-
- glLightfv (GL_LIGHT0, GL_AMBIENT, light_ambient);
- glLightfv (GL_LIGHT0, GL_DIFFUSE, light_diffuse);
- glLightfv (GL_LIGHT0, GL_SPECULAR, light_specular);
- glLightfv (GL_LIGHT0, GL_POSITION, light_position);
- glLightModelfv (GL_LIGHT_MODEL_AMBIENT, global_ambient);
-}
-
-/* call when window is resized */
-static void reshape(int width, int height)
-{
- glViewport (0, 0, width, height);
- glMatrixMode (GL_PROJECTION);
- glLoadIdentity ();
- gluPerspective(45.0, (GLdouble)width/(GLdouble)height,
- 1.0, 10.0);
- glMatrixMode (GL_MODELVIEW);
- glLoadIdentity ();
- gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
-}
-
-static void Benchmark( float xdiff, float ydiff )
-{
- int startTime, endTime;
- int draws;
- double seconds, fps;
-
- printf("Benchmarking...\n");
- fflush(stdout);
-
- draws = 0;
- startTime = glutGet(GLUT_ELAPSED_TIME);
- spinx = spiny = 0.0;
- do {
- spinx += xdiff;
- spiny += ydiff;
- display();
- draws++;
- endTime = glutGet(GLUT_ELAPSED_TIME);
- } while (endTime - startTime < 5000); /* 5 seconds */
-
- /* Results */
- seconds = (double) (endTime - startTime) / 1000.0;
- fps = draws / seconds;
- printf("Result: fps: %g\n", fps);
- fflush(stdout);
-}
-
-
-/* call when mouse button is pressed */
-/* ARGSUSED2 */
-static void mouse(int button, int state, int x, int y) {
- switch (button) {
- case GLUT_LEFT_BUTTON:
- switch (state) {
- case GLUT_DOWN:
- spinx += 5;
- glutPostRedisplay();
- break;
- default:
- break;
- }
- break;
- case GLUT_MIDDLE_BUTTON:
- switch (state) {
- case GLUT_DOWN:
- spiny += 5;
- glutPostRedisplay();
- break;
- default:
- break;
- }
- break;
- case GLUT_RIGHT_BUTTON:
- switch (state) {
- case GLUT_UP:
- exit(0);
- break;
- default:
- break;
- }
- break;
- default:
- break;
- }
-}
-
-/* ARGSUSED1 */
-static void keyboard (unsigned char key, int x, int y)
-{
- switch (key) {
- case 't':
- if (tdist < 4.0) {
- tdist = (tdist + 0.5);
- glutPostRedisplay();
- }
- break;
- case 'T':
- if (tdist > -5.0) {
- tdist = (tdist - 0.5);
- glutPostRedisplay();
- }
- break;
- case 'F':
- polyfactor = polyfactor + 0.1;
- printf ("polyfactor is %f\n", polyfactor);
- glutPostRedisplay();
- break;
- case 'f':
- polyfactor = polyfactor - 0.1;
- printf ("polyfactor is %f\n", polyfactor);
- glutPostRedisplay();
- break;
- case 'U':
- polyunits = polyunits + 1.0;
- printf ("polyunits is %f\n", polyunits);
- glutPostRedisplay();
- break;
- case 'u':
- polyunits = polyunits - 1.0;
- printf ("polyunits is %f\n", polyunits);
- glutPostRedisplay();
- break;
- case 'b':
- Benchmark(5.0, 0);
- break;
- case 'B':
- Benchmark(0, 5.0);
- break;
- case ' ':
- fill = !fill;
- printf ("fill/line: %d\n", fill);
- glutPostRedisplay();
- break;
- case 27: /* Escape */
- exit(0);
- break;
- default:
- break;
- }
- fflush(stdout);
-}
-
-static GLenum Args(int argc, char **argv)
-{
- GLint i;
-
- doubleBuffer = GL_FALSE;
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-sb") == 0) {
- doubleBuffer = GL_FALSE;
- } else if (strcmp(argv[i], "-db") == 0) {
- doubleBuffer = GL_TRUE;
- } else {
- printf("%s (Bad option).\n", argv[i]);
- return GL_FALSE;
- }
- }
- return GL_TRUE;
-}
-
-
-/* Main Loop
- * Open window with initial window size, title bar,
- * RGBA display mode, and handle input events.
- */
-int main(int argc, char** argv)
-{
- GLuint type;
- glutInit(&argc, argv);
-
- Args(argc, argv);
-
- type = GLUT_DEPTH | GLUT_RGB;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
-
- glutInitDisplayMode(type);
- glutCreateWindow("polyoff");
- glutReshapeFunc(reshape);
- glutDisplayFunc(display);
- glutMouseFunc(mouse);
- glutKeyboardFunc(keyboard);
- gfxinit();
- glutMainLoop();
- return 0;
-}
-#else
-int main(int argc, char** argv)
-{
- fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n");
- fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n");
- fprintf (stderr, "you may be able to modify this program to make it run.\n");
- return 0;
-}
-#endif
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