teapot.c

mesa-6.5-minigui源码

/*
 * (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  Unpublished-- rights reserved under the copyright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 "internal.h"

/*
 * Rim, body, lid, and bottom data must be reflected in x and y;
 * handle and spout data across the y axis only.
 */
static int patchdata[][16] =
{
	{ 102, 103, 104, 105,  4,   5,   6,   7,
	    8,   9,  10,  11, 12,  13,  14,  15 }, /* rim     */
	{  12,  13,  14,  15,  16,  17,  18,  19,
	   20,  21,  22,  23,  24,  25,  26,  27 }, /* body   */
	{  24,  25,  26,  27,  29,  30,  31,  32,
	   33,  34,  35,  36,  37,  38,  39,  40 },
	{  96,  96,  96,  96,  97,  98,  99, 100,
	  101, 101, 101, 101,   0,   1,   2,   3 }, /* lid    */
	{   0,   1,   2,   3, 106, 107, 108, 109,
	  110, 111, 112, 113, 114, 115, 116, 117 },
	{ 118, 118, 118, 118, 124, 122, 119, 121,
	  123, 126, 125, 120,  40,  39,  38,  37 }, /* bottom */
	{  41,  42,  43,  44,  45,  46,  47,  48,
	   49,  50,  51,  52,  53,  54,  55,  56 }, /* handle */
	{  53,  54,  55,  56,  57,  58,  59,  60,
	   61,  62,  63,  64,  28,  65,  66,  67 },
	{  68,  69,  70,  71,  72,  73,  74,  75,
	   76,  77,  78,  79,  80,  81,  82,  83 }, /* spout  */
	{  80,  81,  82,  83,  84,  85,  86,  87,
	   88,  89,  90,  91,  92,  93,  94,  95 }
};

static float cpdata[][3] =
{
	{0.2, 0, 2.7}, {0.2, -0.112, 2.7}, {0.112, -0.2, 2.7},
	{0,-0.2, 2.7}, {1.3375, 0, 2.53125}, {1.3375, -0.749, 2.53125},
	{0.749, -1.3375, 2.53125}, {0, -1.3375, 2.53125},
	{1.4375, 0, 2.53125}, {1.4375, -0.805, 2.53125},
	{0.805, -1.4375, 2.53125}, {0, -1.4375, 2.53125},
	{1.5, 0, 2.4}, {1.5, -0.84, 2.4}, {0.84, -1.5, 2.4},
	{0, -1.5, 2.4}, {1.75, 0, 1.875}, {1.75, -0.98, 1.875},
	{0.98, -1.75, 1.875}, {0, -1.75, 1.875}, {2, 0, 1.35},
	{2, -1.12, 1.35}, {1.12, -2, 1.35}, {0, -2, 1.35}, {2, 0, 0.9},
	{2, -1.12, 0.9}, {1.12, -2, 0.9}, {0, -2, 0.9}, {-2, 0, 0.9},
	{2, 0, 0.45}, {2, -1.12, 0.45}, {1.12, -2, 0.45}, {0, -2, 0.45},
	{1.5, 0, 0.225}, {1.5, -0.84, 0.225}, {0.84, -1.5, 0.225},
	{0, -1.5, 0.225}, {1.5, 0, 0.15}, {1.5, -0.84, 0.15},
	{0.84, -1.5, 0.15}, {0, -1.5, 0.15}, {-1.6, 0, 2.025},
	{-1.6, -0.3, 2.025}, {-1.5, -0.3, 2.25}, {-1.5, 0, 2.25},
	{-2.3, 0, 2.025}, {-2.3, -0.3, 2.025}, {-2.5, -0.3, 2.25},
	{-2.5, 0, 2.25}, {-2.7, 0, 2.025}, {-2.7, -0.3, 2.025},
	{-3, -0.3, 2.25}, {-3, 0, 2.25}, {-2.7, 0, 1.8},
	{-2.7, -0.3, 1.8}, {-3, -0.3, 1.8}, {-3, 0, 1.8},
	{-2.7, 0, 1.575}, {-2.7, -0.3, 1.575}, {-3, -0.3, 1.35},
	{-3, 0, 1.35}, {-2.5, 0, 1.125}, {-2.5, -0.3, 1.125},
	{-2.65, -0.3, 0.9375}, {-2.65, 0, 0.9375}, {-2, -0.3, 0.9},
	{-1.9, -0.3, 0.6}, {-1.9, 0, 0.6}, {1.7, 0, 1.425},
	{1.7, -0.66, 1.425}, {1.7, -0.66, 0.6}, {1.7, 0, 0.6},
	{2.6, 0, 1.425}, {2.6, -0.66, 1.425}, {3.1, -0.66, 0.825},
	{3.1, 0, 0.825}, {2.3, 0, 2.1}, {2.3, -0.25, 2.1},
	{2.4, -0.25, 2.025}, {2.4, 0, 2.025}, {2.7, 0, 2.4},
	{2.7, -0.25, 2.4}, {3.3, -0.25, 2.4}, {3.3, 0, 2.4},
	{2.8, 0, 2.475}, {2.8, -0.25, 2.475}, {3.525, -0.25, 2.49375},
	{3.525, 0, 2.49375}, {2.9, 0, 2.475}, {2.9, -0.15, 2.475},
	{3.45, -0.15, 2.5125}, {3.45, 0, 2.5125}, {2.8, 0, 2.4},
	{2.8, -0.15, 2.4}, {3.2, -0.15, 2.4}, {3.2, 0, 2.4},
	{0, 0, 3.15}, {0.8, 0, 3.15}, {0.8, -0.45, 3.15},
	{0.45, -0.8, 3.15}, {0, -0.8, 3.15}, {0, 0, 2.85}, {1.4, 0, 2.4},
	{1.4, -0.784, 2.4}, {0.784, -1.4, 2.4}, {0, -1.4, 2.4},
	{0.4, 0, 2.55}, {0.4, -0.224, 2.55}, {0.224, -0.4, 2.55},
	{0, -0.4, 2.55}, {1.3, 0, 2.55}, {1.3, -0.728, 2.55},
	{0.728, -1.3, 2.55}, {0, -1.3, 2.55}, {1.3, 0, 2.4},
	{1.3, -0.728, 2.4}, {0.728, -1.3, 2.4}, {0, -1.3, 2.4},
	{0, 0, 0}, {1.425, -0.798, 0}, {1.5, 0, 0.075}, {1.425, 0, 0},
	{0.798, -1.425, 0}, {0, -1.5, 0.075}, {0, -1.425, 0},
	{1.5, -0.84, 0.075}, {0.84, -1.5, 0.075}
};

static float tex[2][2][2] =
{
	{ {0, 0}, {1, 0} },
	{ {0, 1}, {1, 1} }
};

static void teapot( GLint grid, GLdouble scale, GLenum type )
{
	float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
	long i, j, k, l;

	glPushAttrib( GL_ENABLE_BIT | GL_EVAL_BIT );
	glEnable( GL_AUTO_NORMAL );
	glEnable( GL_NORMALIZE );
	glEnable( GL_MAP2_VERTEX_3 );
	glEnable( GL_MAP2_TEXTURE_COORD_2 );

	glPushMatrix();
	glRotatef(270.0, 1.0, 0.0, 0.0);
	glScalef(0.5 * scale, 0.5 * scale, 0.5 * scale);
	glTranslatef(0.0, 0.0, -1.5);

	for (i = 0; i < 10; i++)
	{
		for (j = 0; j < 4; j++)
		{
			for (k = 0; k < 4; k++)
			{
				for (l = 0; l < 3; l++)
				{
					p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
					q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
					if (l == 1)
						q[j][k][l] *= -1.0;
					if (i < 6)
					{
						r[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
						if (l == 0)
							r[j][k][l] *= -1.0;
						s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
						if (l == 0)
							s[j][k][l] *= -1.0;
						if (l == 1)
							s[j][k][l] *= -1.0;
					}
				}
			}
		}

		glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2,
			&tex[0][0][0]);
		glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
			&p[0][0][0]);
		glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
		glEvalMesh2(type, 0, grid, 0, grid);
		glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
			&q[0][0][0]);
		glEvalMesh2(type, 0, grid, 0, grid);
		if (i < 6)
		{
			glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
				&r[0][0][0]);
			glEvalMesh2(type, 0, grid, 0, grid);
			glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
				&s[0][0][0]);
			glEvalMesh2(type, 0, grid, 0, grid);
		}
	}

	glPopMatrix();
	glPopAttrib();
}

void glutWireTeapot(GLdouble size)
{
	teapot(10, size, GL_LINE);
}

void glutSolidTeapot(GLdouble size)
{
	teapot(7, size, GL_FILL);
}