OpenGLUT 0.6.3 development - OpenGLUT: teapots.c File Reference
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# teapots.c File Reference

## Detailed Description

This program demonstrates lots of material properties.

A single light source illuminates the objects.

    /* 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     * Unpublished-- rights reserved under the copyright laws of the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.
     */

    #include <GL/openglut.h>
    #include <stdlib.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, 18.0 * (GLfloat) h / (GLfloat) w,
          -10.0, 10.0);
      else
        glOrtho(0.0, 16.0 * (GLfloat) w / (GLfloat) h, 0.0, 18.0,
          -10.0, 10.0);
      glMatrixMode(GL_MODELVIEW);
    }

    static void
    key(unsigned char k, int x, int y)
    {
      switch (k) {
      case 27:  /* Escape */
        exit(0);
        break;
      default:
        return;
      }
      glutPostRedisplay();
    }

    /*
     * 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);
      glutKeyboardFunc(key);
      glutMainLoop();
      return 0;             /* ANSI C requires main to return int. */
    }

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