2 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
4 * Permission to use, copy, modify, and distribute this software for
5 * any purpose and without fee is hereby granted, provided that the above
6 * copyright notice appear in all copies and that both the copyright notice
7 * and this permission notice appear in supporting documentation, and that
8 * the name of Silicon Graphics, Inc. not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission.
12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
15 * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
16 * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
25 * US Government Users Restricted Rights
26 * Use, duplication, or disclosure by the Government is subject to
27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
29 * clause at DFARS 252.227-7013 and/or in similar or successor
30 * clauses in the FAR or the DOD or NASA FAR Supplement.
31 * Unpublished-- rights reserved under the copyright laws of the
32 * United States. Contractor/manufacturer is Silicon Graphics,
33 * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
35 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
40 * This program demonstrates vertex arrays.
52 # include <GLUT/glut.h>
68 static enum SetupMethod setupMethod = POINTER;
69 static enum DerefMethod derefMethod = DRAWELEMENTS;
73 static void parseArgs(int argc, char** argv)
77 for (i = 1; i < argc; ++i) {
78 const char *arg = argv[i];
79 if (strcmp(arg, "pointer") == 0) {
80 setupMethod = POINTER;
81 } else if (strcmp(arg, "interleaved") == 0) {
82 setupMethod = INTERLEAVED;
83 } else if (strcmp(arg, "drawarrays") == 0) {
84 derefMethod = DRAWARRAYS;
85 } else if (strcmp(arg, "arrayelement") == 0) {
86 derefMethod = ARRAYELEMENT;
87 } else if (strcmp(arg, "drawelements") == 0) {
88 derefMethod = DRAWELEMENTS;
90 fprintf(stderr, "error: unknown arg %s\n", arg);
96 static void setupPointers(void)
98 static GLint vertices[] = {
106 static GLfloat colors[] = {
115 glEnableClientState(GL_VERTEX_ARRAY);
116 glEnableClientState(GL_COLOR_ARRAY);
118 glVertexPointer(2, GL_INT, 2 * sizeof(GLint), vertices);
119 glColorPointer(3, GL_FLOAT, 3 * sizeof(GLfloat), colors);
122 static void setupInterleave(void)
124 static GLfloat intertwined[] = {
125 1.0 , 0.2 , 0.2 , 25.0, 25.0, 0.0,
126 0.2 , 0.2 , 1.0 , 100.0, 325.0, 0.0,
127 0.8 , 1.0 , 0.2 , 175.0, 25.0, 0.0,
128 0.75, 0.75, 0.75, 175.0, 325.0, 0.0,
129 0.35, 0.35, 0.35, 250.0, 25.0, 0.0,
130 0.5 , 0.5 , 0.5 , 325.0, 325.0, 0.0
133 glInterleavedArrays(GL_C3F_V3F, 0, intertwined);
136 static void init(void)
138 glClearColor(0.0, 0.0, 0.0, 0.0);
139 glShadeModel(GL_SMOOTH);
143 static void display(void)
145 glClear(GL_COLOR_BUFFER_BIT);
147 if (derefMethod == DRAWARRAYS)
148 glDrawArrays(GL_TRIANGLES, 0, 6);
149 else if (derefMethod == ARRAYELEMENT) {
150 glBegin(GL_TRIANGLES);
156 else if (derefMethod == DRAWELEMENTS) {
157 GLuint indices[4] = {0, 1, 3, 4};
159 glDrawElements(GL_POLYGON, 4, GL_UNSIGNED_INT, indices);
163 glutDestroyWindow(win);
168 static void reshape(int w, int h)
170 glViewport(0, 0, (GLsizei) w, (GLsizei) h);
171 glMatrixMode(GL_PROJECTION);
173 glOrtho(0.0, (GLdouble) w, 0.0, (GLdouble) h, -1.0, 1.0);
176 int main(int argc, char** argv)
178 parseArgs(argc, argv);
179 glutInit(&argc, argv);
180 glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
181 glutInitWindowSize(350, 350);
182 glutInitWindowPosition(100, 100);
183 win = glutCreateWindow(argv[0]);
185 glutDisplayFunc(display);
186 glutReshapeFunc(reshape);