| /* |
| * 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| * Unpublished-- rights reserved under the copyright laws of the |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. |
| */ |
| |
| /* |
| * varray.c |
| * This program demonstrates vertex arrays. |
| */ |
| #include <GL/glut.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #ifdef GL_VERSION_1_1 |
| #define POINTER 1 |
| #define INTERLEAVED 2 |
| |
| #define DRAWARRAY 1 |
| #define ARRAYELEMENT 2 |
| #define DRAWELEMENTS 3 |
| |
| int setupMethod = POINTER; |
| int derefMethod = DRAWARRAY; |
| |
| static void setupPointers(void) |
| { |
| static GLint vertices[] = {25, 25, |
| 100, 325, |
| 175, 25, |
| 175, 325, |
| 250, 25, |
| 325, 325}; |
| static GLfloat colors[] = {1.0, 0.2, 0.2, |
| 0.2, 0.2, 1.0, |
| 0.8, 1.0, 0.2, |
| 0.75, 0.75, 0.75, |
| 0.35, 0.35, 0.35, |
| 0.5, 0.5, 0.5}; |
| |
| glEnableClientState (GL_VERTEX_ARRAY); |
| glEnableClientState (GL_COLOR_ARRAY); |
| |
| glVertexPointer (2, GL_INT, 0, vertices); |
| glColorPointer (3, GL_FLOAT, 0, colors); |
| } |
| |
| static void setupInterleave(void) |
| { |
| static GLfloat intertwined[] = |
| {1.0, 0.2, 1.0, 100.0, 100.0, 0.0, |
| 1.0, 0.2, 0.2, 0.0, 200.0, 0.0, |
| 1.0, 1.0, 0.2, 100.0, 300.0, 0.0, |
| 0.2, 1.0, 0.2, 200.0, 300.0, 0.0, |
| 0.2, 1.0, 1.0, 300.0, 200.0, 0.0, |
| 0.2, 0.2, 1.0, 200.0, 100.0, 0.0}; |
| |
| glInterleavedArrays (GL_C3F_V3F, 0, intertwined); |
| } |
| |
| static void init(void) |
| { |
| glClearColor (0.0, 0.0, 0.0, 0.0); |
| glShadeModel (GL_SMOOTH); |
| setupPointers (); |
| } |
| |
| static void display(void) |
| { |
| glClear (GL_COLOR_BUFFER_BIT); |
| |
| if (derefMethod == DRAWARRAY) |
| glDrawArrays (GL_TRIANGLES, 0, 6); |
| else if (derefMethod == ARRAYELEMENT) { |
| glBegin (GL_TRIANGLES); |
| glArrayElement (2); |
| glArrayElement (3); |
| glArrayElement (5); |
| glEnd (); |
| } |
| else if (derefMethod == DRAWELEMENTS) { |
| GLuint indices[4] = {0, 1, 3, 4}; |
| |
| glDrawElements (GL_POLYGON, 4, GL_UNSIGNED_INT, indices); |
| } |
| glFlush (); |
| } |
| |
| static void reshape (int w, int h) |
| { |
| glViewport (0, 0, (GLsizei) w, (GLsizei) h); |
| glMatrixMode (GL_PROJECTION); |
| glLoadIdentity (); |
| gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h); |
| } |
| |
| /* ARGSUSED2 */ |
| static void mouse (int button, int state, int x, int y) |
| { |
| switch (button) { |
| case GLUT_LEFT_BUTTON: |
| if (state == GLUT_DOWN) { |
| if (setupMethod == POINTER) { |
| setupMethod = INTERLEAVED; |
| setupInterleave(); |
| } |
| else if (setupMethod == INTERLEAVED) { |
| setupMethod = POINTER; |
| setupPointers(); |
| } |
| glutPostRedisplay(); |
| } |
| break; |
| case GLUT_MIDDLE_BUTTON: |
| case GLUT_RIGHT_BUTTON: |
| if (state == GLUT_DOWN) { |
| if (derefMethod == DRAWARRAY) |
| derefMethod = ARRAYELEMENT; |
| else if (derefMethod == ARRAYELEMENT) |
| derefMethod = DRAWELEMENTS; |
| else if (derefMethod == DRAWELEMENTS) |
| derefMethod = DRAWARRAY; |
| glutPostRedisplay(); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* ARGSUSED1 */ |
| static 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); |
| glutInitWindowSize (350, 350); |
| glutInitWindowPosition (100, 100); |
| glutCreateWindow (argv[0]); |
| init (); |
| glutDisplayFunc(display); |
| glutReshapeFunc(reshape); |
| glutMouseFunc(mouse); |
| glutKeyboardFunc (keyboard); |
| 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 |