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Diffstat (limited to 'progs/redbook/colormat.c')
| -rw-r--r-- | progs/redbook/colormat.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/progs/redbook/colormat.c b/progs/redbook/colormat.c new file mode 100644 index 0000000000..9db4491bac --- /dev/null +++ b/progs/redbook/colormat.c @@ -0,0 +1,153 @@ +/* + * 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 + * Unpublished-- rights reserved under the copyright laws of the + * United States.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. + */ + +/* + * colormat.c + * After initialization, the program will be in + * ColorMaterial mode. Interaction: pressing the + * mouse buttons will change the diffuse reflection values. + */ +#include <GL/glut.h> +#include <stdlib.h> + +GLfloat diffuseMaterial[4] = { 0.5, 0.5, 0.5, 1.0 }; + +/* Initialize material property, light source, lighting model, + * and depth buffer. + */ +void init(void) +{ + GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 }; + + glClearColor (0.0, 0.0, 0.0, 0.0); + glShadeModel (GL_SMOOTH); + glEnable(GL_DEPTH_TEST); + glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuseMaterial); + glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); + glMaterialf(GL_FRONT, GL_SHININESS, 25.0); + glLightfv(GL_LIGHT0, GL_POSITION, light_position); + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + + glColorMaterial(GL_FRONT, GL_DIFFUSE); + glEnable(GL_COLOR_MATERIAL); +} + +void display(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glutSolidSphere(1.0, 20, 16); + glFlush (); +} + +void reshape (int w, int h) +{ + glViewport (0, 0, (GLsizei) w, (GLsizei) h); + glMatrixMode (GL_PROJECTION); + glLoadIdentity(); + if (w <= h) + glOrtho (-1.5, 1.5, -1.5*(GLfloat)h/(GLfloat)w, + 1.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0); + else + glOrtho (-1.5*(GLfloat)w/(GLfloat)h, + 1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); +} + +/* ARGSUSED2 */ +void mouse(int button, int state, int x, int y) +{ + switch (button) { + case GLUT_LEFT_BUTTON: + if (state == GLUT_DOWN) { + diffuseMaterial[0] += 0.1; + if (diffuseMaterial[0] > 1.0) + diffuseMaterial[0] = 0.0; + glColor4fv(diffuseMaterial); + glutPostRedisplay(); + } + break; + case GLUT_MIDDLE_BUTTON: + if (state == GLUT_DOWN) { + diffuseMaterial[1] += 0.1; + if (diffuseMaterial[1] > 1.0) + diffuseMaterial[1] = 0.0; + glColor4fv(diffuseMaterial); + glutPostRedisplay(); + } + break; + case GLUT_RIGHT_BUTTON: + if (state == GLUT_DOWN) { + diffuseMaterial[2] += 0.1; + if (diffuseMaterial[2] > 1.0) + diffuseMaterial[2] = 0.0; + glColor4fv(diffuseMaterial); + 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 | GLUT_DEPTH); + glutInitWindowSize (500, 500); + glutInitWindowPosition (100, 100); + glutCreateWindow (argv[0]); + init (); + glutDisplayFunc(display); + glutReshapeFunc(reshape); + glutMouseFunc(mouse); + glutKeyboardFunc(keyboard); + glutMainLoop(); + return 0; +} |