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Diffstat (limited to 'progs/redbook/varray.c')
| -rw-r--r-- | progs/redbook/varray.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/progs/redbook/varray.c b/progs/redbook/varray.c new file mode 100644 index 0000000000..b22e723e0e --- /dev/null +++ b/progs/redbook/varray.c @@ -0,0 +1,195 @@ +/* + * 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 + * Unpublished-- rights reserved under the copyright laws of the + * United States.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; + +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); +} + +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); +} + +void init(void) +{ + glClearColor (0.0, 0.0, 0.0, 0.0); + glShadeModel (GL_SMOOTH); + setupPointers (); +} + +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 (); +} + +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 */ +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 */ +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 |