teapots.c
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上传日期:2007-05-28
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- /* Copyright (c) Mark J. Kilgard, 1994. */
- /**
- * (c) Copyright 1993, 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- * Unpublished-- rights reserved under the copyright laws of the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(TM) is a trademark of Silicon Graphics, Inc.
- */
- /**
- * teapots.c
- * This program demonstrates lots of material properties.
- * A single light source illuminates the objects.
- */
- #include <stdlib.h>
- #include <GL/glut.h>
- /*
- * Initialize depth buffer, projection matrix, light source, and lighting
- * model. Do not specify a material property here.
- */
- void
- myinit(void)
- {
- GLfloat ambient[] =
- {0.0, 0.0, 0.0, 1.0};
- GLfloat diffuse[] =
- {1.0, 1.0, 1.0, 1.0};
- GLfloat position[] =
- {0.0, 3.0, 3.0, 0.0};
- GLfloat lmodel_ambient[] =
- {0.2, 0.2, 0.2, 1.0};
- GLfloat local_view[] =
- {0.0};
- glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
- glLightfv(GL_LIGHT0, GL_POSITION, position);
- glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
- glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);
- glFrontFace(GL_CW);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_AUTO_NORMAL);
- glEnable(GL_NORMALIZE);
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LESS);
- }
- /*
- * Move object into position. Use 3rd through 12th parameters to specify the
- * material property. Draw a teapot.
- */
- void
- renderTeapot(GLfloat x, GLfloat y,
- GLfloat ambr, GLfloat ambg, GLfloat ambb,
- GLfloat difr, GLfloat difg, GLfloat difb,
- GLfloat specr, GLfloat specg, GLfloat specb, GLfloat shine)
- {
- float mat[4];
- glPushMatrix();
- glTranslatef(x, y, 0.0);
- mat[0] = ambr;
- mat[1] = ambg;
- mat[2] = ambb;
- mat[3] = 1.0;
- glMaterialfv(GL_FRONT, GL_AMBIENT, mat);
- mat[0] = difr;
- mat[1] = difg;
- mat[2] = difb;
- glMaterialfv(GL_FRONT, GL_DIFFUSE, mat);
- mat[0] = specr;
- mat[1] = specg;
- mat[2] = specb;
- glMaterialfv(GL_FRONT, GL_SPECULAR, mat);
- glMaterialf(GL_FRONT, GL_SHININESS, shine * 128.0);
- glutSolidTeapot(1.0);
- glPopMatrix();
- }
- /**
- * First column: emerald, jade, obsidian, pearl, ruby, turquoise
- * 2nd column: brass, bronze, chrome, copper, gold, silver
- * 3rd column: black, cyan, green, red, white, yellow plastic
- * 4th column: black, cyan, green, red, white, yellow rubber
- */
- void
- display(void)
- {
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- renderTeapot(2.0, 17.0, 0.0215, 0.1745, 0.0215,
- 0.07568, 0.61424, 0.07568, 0.633, 0.727811, 0.633, 0.6);
- renderTeapot(2.0, 14.0, 0.135, 0.2225, 0.1575,
- 0.54, 0.89, 0.63, 0.316228, 0.316228, 0.316228, 0.1);
- renderTeapot(2.0, 11.0, 0.05375, 0.05, 0.06625,
- 0.18275, 0.17, 0.22525, 0.332741, 0.328634, 0.346435, 0.3);
- renderTeapot(2.0, 8.0, 0.25, 0.20725, 0.20725,
- 1, 0.829, 0.829, 0.296648, 0.296648, 0.296648, 0.088);
- renderTeapot(2.0, 5.0, 0.1745, 0.01175, 0.01175,
- 0.61424, 0.04136, 0.04136, 0.727811, 0.626959, 0.626959, 0.6);
- renderTeapot(2.0, 2.0, 0.1, 0.18725, 0.1745,
- 0.396, 0.74151, 0.69102, 0.297254, 0.30829, 0.306678, 0.1);
- renderTeapot(6.0, 17.0, 0.329412, 0.223529, 0.027451,
- 0.780392, 0.568627, 0.113725, 0.992157, 0.941176, 0.807843,
- 0.21794872);
- renderTeapot(6.0, 14.0, 0.2125, 0.1275, 0.054,
- 0.714, 0.4284, 0.18144, 0.393548, 0.271906, 0.166721, 0.2);
- renderTeapot(6.0, 11.0, 0.25, 0.25, 0.25,
- 0.4, 0.4, 0.4, 0.774597, 0.774597, 0.774597, 0.6);
- renderTeapot(6.0, 8.0, 0.19125, 0.0735, 0.0225,
- 0.7038, 0.27048, 0.0828, 0.256777, 0.137622, 0.086014, 0.1);
- renderTeapot(6.0, 5.0, 0.24725, 0.1995, 0.0745,
- 0.75164, 0.60648, 0.22648, 0.628281, 0.555802, 0.366065, 0.4);
- renderTeapot(6.0, 2.0, 0.19225, 0.19225, 0.19225,
- 0.50754, 0.50754, 0.50754, 0.508273, 0.508273, 0.508273, 0.4);
- renderTeapot(10.0, 17.0, 0.0, 0.0, 0.0, 0.01, 0.01, 0.01,
- 0.50, 0.50, 0.50, .25);
- renderTeapot(10.0, 14.0, 0.0, 0.1, 0.06, 0.0, 0.50980392, 0.50980392,
- 0.50196078, 0.50196078, 0.50196078, .25);
- renderTeapot(10.0, 11.0, 0.0, 0.0, 0.0,
- 0.1, 0.35, 0.1, 0.45, 0.55, 0.45, .25);
- renderTeapot(10.0, 8.0, 0.0, 0.0, 0.0, 0.5, 0.0, 0.0,
- 0.7, 0.6, 0.6, .25);
- renderTeapot(10.0, 5.0, 0.0, 0.0, 0.0, 0.55, 0.55, 0.55,
- 0.70, 0.70, 0.70, .25);
- renderTeapot(10.0, 2.0, 0.0, 0.0, 0.0, 0.5, 0.5, 0.0,
- 0.60, 0.60, 0.50, .25);
- renderTeapot(14.0, 17.0, 0.02, 0.02, 0.02, 0.01, 0.01, 0.01,
- 0.4, 0.4, 0.4, .078125);
- renderTeapot(14.0, 14.0, 0.0, 0.05, 0.05, 0.4, 0.5, 0.5,
- 0.04, 0.7, 0.7, .078125);
- renderTeapot(14.0, 11.0, 0.0, 0.05, 0.0, 0.4, 0.5, 0.4,
- 0.04, 0.7, 0.04, .078125);
- renderTeapot(14.0, 8.0, 0.05, 0.0, 0.0, 0.5, 0.4, 0.4,
- 0.7, 0.04, 0.04, .078125);
- renderTeapot(14.0, 5.0, 0.05, 0.05, 0.05, 0.5, 0.5, 0.5,
- 0.7, 0.7, 0.7, .078125);
- renderTeapot(14.0, 2.0, 0.05, 0.05, 0.0, 0.5, 0.5, 0.4,
- 0.7, 0.7, 0.04, .078125);
- glFlush();
- }
- void
- myReshape(int w, int h)
- {
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- if (w <= h)
- glOrtho(0.0, 16.0, 0.0, 16.0 * (GLfloat) h / (GLfloat) w,
- -10.0, 10.0);
- else
- glOrtho(0.0, 16.0 * (GLfloat) w / (GLfloat) h, 0.0, 16.0,
- -10.0, 10.0);
- glMatrixMode(GL_MODELVIEW);
- }
- /*
- * Main Loop Open window with initial window size, title bar, RGBA display
- * mode, and handle input events.
- */
- int
- main(int argc, char **argv)
- {
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
- glutCreateWindow(argv[0]);
- myinit();
- glutReshapeFunc(myReshape);
- glutDisplayFunc(display);
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
- }