/*
 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the name of
 * Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "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 BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <GL/glut.h>

/* Minimum stack space */
static USED const char *stack = "$STACK:65535"; 


#define PI 3.141592654

#define	BLACK 0
#define	GRAY 128
#define	WHITE 255
#define BL 0x00
#define WH 0xFF
#define RD 0xA4,0x00,0x00,0xFF
#define WT 0xFF,0xFF,0xFF,0xFF

#define	CHECKIMAGEWIDTH 8
#define	CHECKIMAGEHEIGHT 8
#define	BRICKIMAGEWIDTH 16
#define	BRICKIMAGEHEIGHT 16


GLenum doubleBuffer;

//#include "tkmap.c"

float black[3] = {0.0, 0.0, 0.0};
float white[3] = {1.0, 1.0, 1.0};
float gray[3] = {0.5, 0.5, 0.5};
float blue[3] = {0.0, 0.0, 1.0};
GLint colorIndexes[3] = {0, 200, 255};

GLenum polyMode;
GLboolean dithering;
GLboolean shade;
GLboolean doStipple;
GLboolean noDraw = 0;
GLboolean LineSmooth = GL_FALSE;

double plane[4] = {1.0, 0.0, -1.0, 0.0};
float xRotation = 30.0, yRotation = 30.0;
float zTranslation = -15.0;

GLint singleCylinder;
GLint doubleCylinder;
GLint elbow, logo;

GLubyte checkImage[3*CHECKIMAGEWIDTH*CHECKIMAGEHEIGHT] = {
		BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH,
		WH, WH, BL, BL, BL, WH, WH, WH, WH, WH, WH, BL, BL, BL, WH, WH,
		WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL,
		BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH,
		WH, WH, BL, BL, BL, WH, WH, WH, WH, WH, WH, BL, BL, BL, WH, WH,
		WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL,
		BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH,
		WH, WH, BL, BL, BL, WH, WH, WH, WH, WH, WH, BL, BL, BL, WH, WH,
		WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL,
		BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH,
		WH, WH, BL, BL, BL, WH, WH, WH, WH, WH, WH, BL, BL, BL, WH, WH,
		WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, WH, WH, WH, BL, BL, BL, 
};
GLubyte brickImage[4*BRICKIMAGEWIDTH*BRICKIMAGEHEIGHT] = {
		RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
		RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
		RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
		RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
		WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT,
		RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
		RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
		RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
		RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
		WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT,
		RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
		RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
		RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
		RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
		WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT,
		RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD
};

GLubyte *image = checkImage;
GLint imageHeight = CHECKIMAGEHEIGHT;
GLint imageWidth = CHECKIMAGEWIDTH;

static float decal[] = {
		GL_DECAL,
};
static float modulate[] = {
		GL_MODULATE,
};
static float repeat[] = {
		GL_REPEAT,
};
static float nearest[] = {
		GL_NEAREST,
};

GLubyte stipple[4*32] = {
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,

		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,

		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,
		0x00, 0x0F, 0xF0, 0x00,

		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00,
};

float tscp[18][2] = {
		{
				0.0, 0.0
		},
		{
				1.0, 0.0
		},
		{
				0.0, 0.125
		},
		{
				1.0, 0.125
		},
		{
				0.0, 0.250
		},
		{
				1.0, 0.25
		},
		{
				0.0, 0.375
		},
		{
				1.0, 0.375
		},
		{
				0.0, 0.50
		},
		{
				1.0, 0.50
		},
		{
				0.0, 0.625
		},
		{
				1.0, 0.625
		},
		{
				0.0, 0.75
		},
		{
				1.0, 0.75
		},
		{
				0.0, 0.875
		},
		{
				1.0, 0.875
		},
		{
				0.0, 1.0
		},
		{
				1.0, 1.0
		}
};
float scp[18][3] = {
		{
				1.000000, 0.000000, 0.000000
		},
		{
				1.000000, 0.000000, 5.000000
		},
		{
				0.707107, 0.707107, 0.000000
		},
		{
				0.707107, 0.707107, 5.000000
		},
		{
				0.000000, 1.000000, 0.000000
		},
		{
				0.000000, 1.000000, 5.000000
		},
		{
				-0.707107, 0.707107, 0.000000
		},
		{
				-0.707107, 0.707107, 5.000000
		},
		{
				-1.000000, 0.000000, 0.000000
		},
		{
				-1.000000, 0.000000, 5.000000
		},
		{
				-0.707107, -0.707107, 0.000000
		},
		{
				-0.707107, -0.707107, 5.000000
		},
		{
				0.000000, -1.000000, 0.000000
		},
		{
				0.000000, -1.000000, 5.000000
		},
		{
				0.707107, -0.707107, 0.000000
		},
		{
				0.707107, -0.707107, 5.000000
		},
		{
				1.000000, 0.000000, 0.000000
		},
		{
				1.000000, 0.000000, 5.000000
		}
};
float dcp[18][3] = {
		{
				1.000000, 0.000000, 0.000000
		},
		{
				1.000000, 0.000000, 7.000000
		},
		{
				0.707107, 0.707107, 0.000000
		},
		{
				0.707107, 0.707107, 7.000000
		},
		{
				0.000000, 1.000000, 0.000000
		},
		{
				0.000000, 1.000000, 7.000000
		},
		{
				-0.707107, 0.707107, 0.000000
		},
		{
				-0.707107, 0.707107, 7.000000
		},
		{
				-1.000000, 0.000000, 0.000000
		},
		{
				-1.000000, 0.000000, 7.000000
		},
		{
				-0.707107, -0.707107, 0.000000
		},
		{
				-0.707107, -0.707107, 7.000000
		},
		{
				0.000000, -1.000000, 0.000000
		},
		{
				0.000000, -1.000000, 7.000000
		},
		{
				0.707107, -0.707107, 0.000000
		},
		{
				0.707107, -0.707107, 7.000000
		},
		{
				1.000000, 0.000000, 0.000000
		},
		{
				1.000000, 0.000000, 7.000000
		}
};
float ep[7][9][3] = {
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.707107, 0.000000
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.707107, 0.000000
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.707107, 0.000000
				},
				{
						0.000000, -1.000000, 0.000000
				},
				{
						0.707107, -0.707107, 0.000000
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.034074, 0.258819
				},
				{
						0.707107, 0.717087, 0.075806
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.717087, 0.075806
				},
				{
						-1.000000, 0.034074, 0.258819
				},
				{
						-0.707107, -0.648939, 0.441832
				},
				{
						0.000000, -0.931852, 0.517638
				},
				{
						0.707107, -0.648939, 0.441832
				},
				{
						1.000000, 0.034074, 0.258819
				}
		},
		{
				{
						1.000000, 0.133975, 0.500000
				},
				{
						0.707107, 0.746347, 0.146447
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.746347, 0.146447
				},
				{
						-1.000000, 0.133975, 0.500000
				},
				{
						-0.707107, -0.478398, 0.853553
				},
				{
						0.000000, -0.732051, 1.000000
				},
				{
						0.707107, -0.478398, 0.853553
				},
				{
						1.000000, 0.133975, 0.500000
				}
		},
		{
				{
						1.000000, 0.292893, 0.707107
				},
				{
						0.707107, 0.792893, 0.207107
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.792893, 0.207107
				},
				{
						-1.000000, 0.292893, 0.707107
				},
				{
						-0.707107, -0.207107, 1.207107
				},
				{
						0.000000, -0.414214, 1.414214
				},
				{
						0.707107, -0.207107, 1.207107
				},
				{
						1.000000, 0.292893, 0.707107
				}
		},
		{
				{
						1.000000, 0.500000, 0.866025
				},
				{
						0.707107, 0.853553, 0.253653
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.853553, 0.253653
				},
				{
						-1.000000, 0.500000, 0.866025
				},
				{
						-0.707107, 0.146447, 1.478398
				},
				{
						0.000000, 0.000000, 1.732051
				},
				{
						0.707107, 0.146447, 1.478398
				},
				{
						1.000000, 0.500000, 0.866025
				}
		},
		{
				{
						1.000000, 0.741181, 0.965926
				},
				{
						0.707107, 0.924194, 0.282913
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.924194, 0.282913
				},
				{
						-1.000000, 0.741181, 0.965926
				},
				{
						-0.707107, 0.558168, 1.648939
				},
				{
						0.000000, 0.482362, 1.931852
				},
				{
						0.707107, 0.558168, 1.648939
				},
				{
						1.000000, 0.741181, 0.965926
				}
		},
		{
				{
						1.000000, 1.000000, 1.000000
				},
				{
						0.707107, 1.000000, 0.292893
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 1.000000, 0.292893
				},
				{
						-1.000000, 1.000000, 1.000000
				},
				{
						-0.707107, 1.000000, 1.707107
				},
				{
						0.000000, 1.000000, 2.000000
				},
				{
						0.707107, 1.000000, 1.707107
				},
				{
						1.000000, 1.000000, 1.000000
				}
		}
};
float en[7][9][3] = {
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.707107, 0.000000
				},
				{
						0.000000, 1.000000, 0.000000
				},
				{
						-0.707107, 0.707107, 0.000000
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.707107, 0.000000
				},
				{
						0.000000, -1.000000, 0.000000
				},
				{
						0.707107, -0.707107, 0.000000
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.683013, -0.183013
				},
				{
						0.000000, 0.965926, -0.258819
				},
				{
						-0.707107, 0.683013, -0.183013
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.683013, 0.183013
				},
				{
						0.000000, -0.965926, 0.258819
				},
				{
						0.707107, -0.683013, 0.183013
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.612372, -0.353553
				},
				{
						0.000000, 0.866025, -0.500000
				},
				{
						-0.707107, 0.612372, -0.353553
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.612372, 0.353553
				},
				{
						0.000000, -0.866025, 0.500000
				},
				{
						0.707107, -0.612372, 0.353553
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						/* These 3 lines added by BEP */
						0.707107, 0.500000, -0.500000
				},
				{
						0.000000, 0.707107, -0.707107
				},
				{
						-0.707107, 0.500000, -0.500000
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.500000, 0.500000
				},
				{
						0.000000, -0.707107, 0.707107
				},
				{
						0.707107, -0.500000, 0.500000
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.353553, -0.612372
				},
				{
						0.000000, 0.500000, -0.866025
				},
				{
						-0.707107, 0.353553, -0.612372
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.353553, 0.612372
				},
				{
						0.000000, -0.500000, 0.866025
				},
				{
						0.707107, -0.353553, 0.612372
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.183013, -0.683013
				},
				{
						0.000000, 0.258819, -0.965926
				},
				{
						-0.707107, 0.183013, -0.683013
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, -0.183013, 0.683013
				},
				{
						0.000000, -0.258819, 0.965926
				},
				{
						0.707107, -0.183013, 0.683013
				},
				{
						1.000000, 0.000000, 0.000000
				}
		},
		{
				{
						1.000000, 0.000000, 0.000000
				},
				{
						0.707107, 0.000000, -0.707107
				},
				{
						0.000000, 0.000000, -1.000000
				},
				{
						-0.707107, 0.000000, -0.707107
				},
				{
						-1.000000, 0.000000, 0.000000
				},
				{
						-0.707107, 0.000000, 0.707107
				},
				{
						0.000000, 0.000000, 1.000000
				},
				{
						0.707107, 0.000000, 0.707107
				},
				{
						1.000000, 0.000000, 0.000000
				}
		}
};
float tep[7][9][2] = {
		{
				{
						0,     0.0
				},
				{
						0.125, 0.0
				},
				{
						0.25,  0.0
				},
				{
						0.375, 0.0
				},
				{
						0.5,   0.0
				},
				{
						0.625, 0.0
				},
				{
						0.75,  0.0
				},
				{
						0.875, 0.0
				},
				{
						1.0,   0.0
				}
		},
		{
				{
						0,     0.16667
				},
				{
						0.125, 0.16667
				},
				{
						0.25,  0.16667
				},
				{
						0.375, 0.16667
				},
				{
						0.5,   0.16667
				},
				{
						0.625, 0.16667
				},
				{
						0.75,  0.16667
				},
				{
						0.875, 0.16667
				},
				{
						1.0,   0.16667
				}
		},
		{
				{
						0,     0.33333
				},
				{
						0.125, 0.33333
				},
				{
						0.25,  0.33333
				},
				{
						0.375, 0.33333
				},
				{
						0.5,   0.33333
				},
				{
						0.625, 0.33333
				},
				{
						0.75,  0.33333
				},
				{
						0.875, 0.33333
				},
				{
						1.0,   0.33333
				}
		},
		{
				{
						0,     0.5
				},
				{
						0.125, 0.5
				},
				{
						0.25,  0.5
				},
				{
						0.375, 0.5
				},
				{
						0.5,   0.5
				},
				{
						0.625, 0.5
				},
				{
						0.75,  0.5
				},
				{
						0.875, 0.5
				},
				{
						1.0,   0.5
				}
		},
		{
				{
						0,     0.6667
				},
				{
						0.125, 0.6667
				},
				{
						0.25,  0.6667
				},
				{
						0.375, 0.6667
				},
				{
						0.5,   0.6667
				},
				{
						0.625, 0.6667
				},
				{
						0.75,  0.6667
				},
				{
						0.875, 0.6667
				},
				{
						1.0,   0.6667
				}
		},
		{
				{
						0,     0.83333
				},
				{
						0.125, 0.83333
				},
				{
						0.25,  0.83333
				},
				{
						0.375, 0.83333
				},
				{
						0.5,   0.83333
				},
				{
						0.625, 0.83333
				},
				{
						0.75,  0.83333
				},
				{
						0.875, 0.83333
				},
				{
						1.0,   0.83333
				}
		},
		{
				{
						0,     1.0
				},
				{
						0.125, 1.0
				},
				{
						0.25,  1.0
				},
				{
						0.375, 1.0
				},
				{
						0.5,   1.0
				},
				{
						0.625, 1.0
				},
				{
						0.75,  1.0
				},
				{
						0.875, 1.0
				},
				{
						1.0,   1.0
				}
		}
};


static void BendForward(void)
{

	glTranslatef(0.0, 1.0, 0.0);
	glRotatef(90.0, 1, 0, 0);
	glTranslatef(0.0, -1.0, 0.0);
}

static void BendLeft(void)
{

	glRotatef(-90.0, 0, 0, 1);
	glTranslatef(0.0, 1.0, 0.0);
	glRotatef(90.0, 1, 0, 0);
	glTranslatef(0.0, -1.0, 0.0);
}

static void BendRight(void)
{

	glRotatef(90.0, 0, 0, 1);
	glTranslatef(0.0, 1.0, 0.0);
	glRotatef(90.0, 1, 0, 0);
	glTranslatef(0.0, -1.0, 0.0);
}

static void BuildSingleCylinder(void)
{

	glNewList(singleCylinder, GL_COMPILE);

	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(scp[0]); glTexCoord2fv(tscp[0]); glVertex3fv(scp[0]);
	glNormal3fv(scp[0]); glTexCoord2fv(tscp[1]); glVertex3fv(scp[1]);
	glNormal3fv(scp[2]); glTexCoord2fv(tscp[2]); glVertex3fv(scp[2]);
	glNormal3fv(scp[2]); glTexCoord2fv(tscp[3]); glVertex3fv(scp[3]);
	glNormal3fv(scp[4]); glTexCoord2fv(tscp[4]); glVertex3fv(scp[4]);
	glNormal3fv(scp[4]); glTexCoord2fv(tscp[5]); glVertex3fv(scp[5]);
	glNormal3fv(scp[6]); glTexCoord2fv(tscp[6]); glVertex3fv(scp[6]);
	glNormal3fv(scp[6]); glTexCoord2fv(tscp[7]); glVertex3fv(scp[7]);
	glNormal3fv(scp[8]); glTexCoord2fv(tscp[8]); glVertex3fv(scp[8]);
	glNormal3fv(scp[8]); glTexCoord2fv(tscp[9]); glVertex3fv(scp[9]);
	glNormal3fv(scp[10]); glTexCoord2fv(tscp[10]); glVertex3fv(scp[10]);
	glNormal3fv(scp[10]); glTexCoord2fv(tscp[11]); glVertex3fv(scp[11]);
	glNormal3fv(scp[12]); glTexCoord2fv(tscp[12]); glVertex3fv(scp[12]);
	glNormal3fv(scp[12]); glTexCoord2fv(tscp[13]); glVertex3fv(scp[13]);
	glNormal3fv(scp[14]); glTexCoord2fv(tscp[14]); glVertex3fv(scp[14]);
	glNormal3fv(scp[14]); glTexCoord2fv(tscp[15]); glVertex3fv(scp[15]);
	glNormal3fv(scp[16]); glTexCoord2fv(tscp[16]); glVertex3fv(scp[16]);
	glNormal3fv(scp[16]); glTexCoord2fv(tscp[17]); glVertex3fv(scp[17]);
	glEnd();

	glEndList();
}

static void BuildDoubleCylinder(void)
{

	glNewList(doubleCylinder, GL_COMPILE);

	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(dcp[0]); glTexCoord2fv(tscp[0]); glVertex3fv(dcp[0]);
	glNormal3fv(dcp[0]); glTexCoord2fv(tscp[1]); glVertex3fv(dcp[1]);
	glNormal3fv(dcp[2]); glTexCoord2fv(tscp[2]); glVertex3fv(dcp[2]);
	glNormal3fv(dcp[2]); glTexCoord2fv(tscp[3]); glVertex3fv(dcp[3]);
	glNormal3fv(dcp[4]); glTexCoord2fv(tscp[4]); glVertex3fv(dcp[4]);
	glNormal3fv(dcp[4]); glTexCoord2fv(tscp[5]); glVertex3fv(dcp[5]);
	glNormal3fv(dcp[6]); glTexCoord2fv(tscp[6]); glVertex3fv(dcp[6]);
	glNormal3fv(dcp[6]); glTexCoord2fv(tscp[7]); glVertex3fv(dcp[7]);
	glNormal3fv(dcp[8]); glTexCoord2fv(tscp[8]); glVertex3fv(dcp[8]);
	glNormal3fv(dcp[8]); glTexCoord2fv(tscp[9]); glVertex3fv(dcp[9]);
	glNormal3fv(dcp[10]); glTexCoord2fv(tscp[10]); glVertex3fv(dcp[10]);
	glNormal3fv(dcp[10]); glTexCoord2fv(tscp[11]); glVertex3fv(dcp[11]);
	glNormal3fv(dcp[12]); glTexCoord2fv(tscp[12]); glVertex3fv(dcp[12]);
	glNormal3fv(dcp[12]); glTexCoord2fv(tscp[13]); glVertex3fv(dcp[13]);
	glNormal3fv(dcp[14]); glTexCoord2fv(tscp[14]); glVertex3fv(dcp[14]);
	glNormal3fv(dcp[14]); glTexCoord2fv(tscp[15]); glVertex3fv(dcp[15]);
	glNormal3fv(dcp[16]); glTexCoord2fv(tscp[16]); glVertex3fv(dcp[16]);
	glNormal3fv(dcp[16]); glTexCoord2fv(tscp[17]); glVertex3fv(dcp[17]);
	glEnd();

	glEndList();
}

static void BuildElbow(void)
{

	glNewList(elbow, GL_COMPILE);

	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(en[0][0]); glTexCoord2fv(tep[0][0]); glVertex3fv(ep[0][0]);
	glNormal3fv(en[1][0]); glTexCoord2fv(tep[1][0]); glVertex3fv(ep[1][0]);
	glNormal3fv(en[0][1]); glTexCoord2fv(tep[0][1]); glVertex3fv(ep[0][1]);
	glNormal3fv(en[1][1]); glTexCoord2fv(tep[1][1]); glVertex3fv(ep[1][1]);
	glNormal3fv(en[0][2]); glTexCoord2fv(tep[0][2]); glVertex3fv(ep[0][2]);
	glNormal3fv(en[1][2]); glTexCoord2fv(tep[1][2]); glVertex3fv(ep[1][2]);
	glNormal3fv(en[0][3]); glTexCoord2fv(tep[0][3]); glVertex3fv(ep[0][3]);
	glNormal3fv(en[1][3]); glTexCoord2fv(tep[1][3]); glVertex3fv(ep[1][3]);
	glNormal3fv(en[0][4]); glTexCoord2fv(tep[0][4]); glVertex3fv(ep[0][4]);
	glNormal3fv(en[1][4]); glTexCoord2fv(tep[1][4]); glVertex3fv(ep[1][4]);
	glNormal3fv(en[0][5]); glTexCoord2fv(tep[0][5]); glVertex3fv(ep[0][5]);
	glNormal3fv(en[1][5]); glTexCoord2fv(tep[1][5]); glVertex3fv(ep[1][5]);
	glNormal3fv(en[0][6]); glTexCoord2fv(tep[0][6]); glVertex3fv(ep[0][6]);
	glNormal3fv(en[1][6]); glTexCoord2fv(tep[1][6]); glVertex3fv(ep[1][6]);
	glNormal3fv(en[0][7]); glTexCoord2fv(tep[0][7]); glVertex3fv(ep[0][7]);
	glNormal3fv(en[1][7]); glTexCoord2fv(tep[1][7]); glVertex3fv(ep[1][7]);
	glNormal3fv(en[0][8]); glTexCoord2fv(tep[0][8]); glVertex3fv(ep[0][8]);
	glNormal3fv(en[1][8]); glTexCoord2fv(tep[1][8]); glVertex3fv(ep[1][8]);
	glEnd();
	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(en[1][0]); glTexCoord2fv(tep[1][0]); glVertex3fv(ep[1][0]);
	glNormal3fv(en[2][0]); glTexCoord2fv(tep[2][0]); glVertex3fv(ep[2][0]);
	glNormal3fv(en[1][1]); glTexCoord2fv(tep[1][1]); glVertex3fv(ep[1][1]);
	glNormal3fv(en[2][1]); glTexCoord2fv(tep[2][1]); glVertex3fv(ep[2][1]);
	glNormal3fv(en[1][2]); glTexCoord2fv(tep[1][2]); glVertex3fv(ep[1][2]);
	glNormal3fv(en[2][2]); glTexCoord2fv(tep[2][2]); glVertex3fv(ep[2][2]);
	glNormal3fv(en[1][3]); glTexCoord2fv(tep[1][3]); glVertex3fv(ep[1][3]);
	glNormal3fv(en[2][3]); glTexCoord2fv(tep[2][3]); glVertex3fv(ep[2][3]);
	glNormal3fv(en[1][4]); glTexCoord2fv(tep[1][4]); glVertex3fv(ep[1][4]);
	glNormal3fv(en[2][4]); glTexCoord2fv(tep[2][4]); glVertex3fv(ep[2][4]);
	glNormal3fv(en[1][5]); glTexCoord2fv(tep[1][5]); glVertex3fv(ep[1][5]);
	glNormal3fv(en[2][5]); glTexCoord2fv(tep[2][5]); glVertex3fv(ep[2][5]);
	glNormal3fv(en[1][6]); glTexCoord2fv(tep[1][6]); glVertex3fv(ep[1][6]);
	glNormal3fv(en[2][6]); glTexCoord2fv(tep[2][6]); glVertex3fv(ep[2][6]);
	glNormal3fv(en[1][7]); glTexCoord2fv(tep[1][7]); glVertex3fv(ep[1][7]);
	glNormal3fv(en[2][7]); glTexCoord2fv(tep[2][7]); glVertex3fv(ep[2][7]);
	glNormal3fv(en[1][8]); glTexCoord2fv(tep[1][8]); glVertex3fv(ep[1][8]);
	glNormal3fv(en[2][8]); glTexCoord2fv(tep[2][8]); glVertex3fv(ep[2][8]);
	glEnd();
	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(en[2][0]); glTexCoord2fv(tep[2][0]); glVertex3fv(ep[2][0]);
	glNormal3fv(en[3][0]); glTexCoord2fv(tep[3][0]); glVertex3fv(ep[3][0]);
	glNormal3fv(en[2][1]); glTexCoord2fv(tep[2][1]); glVertex3fv(ep[2][1]);
	glNormal3fv(en[3][1]); glTexCoord2fv(tep[3][1]); glVertex3fv(ep[3][1]);
	glNormal3fv(en[2][2]); glTexCoord2fv(tep[2][2]); glVertex3fv(ep[2][2]);
	glNormal3fv(en[3][2]); glTexCoord2fv(tep[3][2]); glVertex3fv(ep[3][2]);
	glNormal3fv(en[2][3]); glTexCoord2fv(tep[2][3]); glVertex3fv(ep[2][3]);
	glNormal3fv(en[3][3]); glTexCoord2fv(tep[3][3]); glVertex3fv(ep[3][3]);
	glNormal3fv(en[2][4]); glTexCoord2fv(tep[2][4]); glVertex3fv(ep[2][4]);
	glNormal3fv(en[3][4]); glTexCoord2fv(tep[3][4]); glVertex3fv(ep[3][4]);
	glNormal3fv(en[2][5]); glTexCoord2fv(tep[2][5]); glVertex3fv(ep[2][5]);
	glNormal3fv(en[3][5]); glTexCoord2fv(tep[3][5]); glVertex3fv(ep[3][5]);
	glNormal3fv(en[2][6]); glTexCoord2fv(tep[2][6]); glVertex3fv(ep[2][6]);
	glNormal3fv(en[3][6]); glTexCoord2fv(tep[3][6]); glVertex3fv(ep[3][6]);
	glNormal3fv(en[2][7]); glTexCoord2fv(tep[2][7]); glVertex3fv(ep[2][7]);
	glNormal3fv(en[3][7]); glTexCoord2fv(tep[3][7]); glVertex3fv(ep[3][7]);
	glNormal3fv(en[2][8]); glTexCoord2fv(tep[2][8]); glVertex3fv(ep[2][8]);
	glNormal3fv(en[3][8]); glTexCoord2fv(tep[3][8]); glVertex3fv(ep[3][8]);
	glEnd();
	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(en[3][0]); glTexCoord2fv(tep[3][0]); glVertex3fv(ep[3][0]);
	glNormal3fv(en[4][0]); glTexCoord2fv(tep[4][0]); glVertex3fv(ep[4][0]);
	glNormal3fv(en[3][1]); glTexCoord2fv(tep[3][1]); glVertex3fv(ep[3][1]);
	glNormal3fv(en[4][1]); glTexCoord2fv(tep[4][1]); glVertex3fv(ep[4][1]);
	glNormal3fv(en[3][2]); glTexCoord2fv(tep[3][2]); glVertex3fv(ep[3][2]);
	glNormal3fv(en[4][2]); glTexCoord2fv(tep[4][2]); glVertex3fv(ep[4][2]);
	glNormal3fv(en[3][3]); glTexCoord2fv(tep[3][3]); glVertex3fv(ep[3][3]);
	glNormal3fv(en[4][3]); glTexCoord2fv(tep[4][3]); glVertex3fv(ep[4][3]);
	glNormal3fv(en[3][4]); glTexCoord2fv(tep[3][4]); glVertex3fv(ep[3][4]);
	glNormal3fv(en[4][4]); glTexCoord2fv(tep[4][4]); glVertex3fv(ep[4][4]);
	glNormal3fv(en[3][5]); glTexCoord2fv(tep[3][5]); glVertex3fv(ep[3][5]);
	glNormal3fv(en[4][5]); glTexCoord2fv(tep[4][5]); glVertex3fv(ep[4][5]);
	glNormal3fv(en[3][6]); glTexCoord2fv(tep[3][6]); glVertex3fv(ep[3][6]);
	glNormal3fv(en[4][6]); glTexCoord2fv(tep[4][6]); glVertex3fv(ep[4][6]);
	glNormal3fv(en[3][7]); glTexCoord2fv(tep[3][7]); glVertex3fv(ep[3][7]);
	glNormal3fv(en[4][7]); glTexCoord2fv(tep[4][7]); glVertex3fv(ep[4][7]);
	glNormal3fv(en[3][8]); glTexCoord2fv(tep[3][8]); glVertex3fv(ep[3][8]);
	glNormal3fv(en[4][8]); glTexCoord2fv(tep[4][8]); glVertex3fv(ep[4][8]);
	glEnd();
	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(en[4][0]); glTexCoord2fv(tep[4][0]); glVertex3fv(ep[4][0]);
	glNormal3fv(en[5][0]); glTexCoord2fv(tep[5][0]); glVertex3fv(ep[5][0]);
	glNormal3fv(en[4][1]); glTexCoord2fv(tep[4][1]); glVertex3fv(ep[4][1]);
	glNormal3fv(en[5][1]); glTexCoord2fv(tep[5][1]); glVertex3fv(ep[5][1]);
	glNormal3fv(en[4][2]); glTexCoord2fv(tep[4][2]); glVertex3fv(ep[4][2]);
	glNormal3fv(en[5][2]); glTexCoord2fv(tep[5][2]); glVertex3fv(ep[5][2]);
	glNormal3fv(en[4][3]); glTexCoord2fv(tep[4][3]); glVertex3fv(ep[4][3]);
	glNormal3fv(en[5][3]); glTexCoord2fv(tep[5][3]); glVertex3fv(ep[5][3]);
	glNormal3fv(en[4][4]); glTexCoord2fv(tep[4][4]); glVertex3fv(ep[4][4]);
	glNormal3fv(en[5][4]); glTexCoord2fv(tep[5][4]); glVertex3fv(ep[5][4]);
	glNormal3fv(en[4][5]); glTexCoord2fv(tep[4][5]); glVertex3fv(ep[4][5]);
	glNormal3fv(en[5][5]); glTexCoord2fv(tep[5][5]); glVertex3fv(ep[5][5]);
	glNormal3fv(en[4][6]); glTexCoord2fv(tep[4][6]); glVertex3fv(ep[4][6]);
	glNormal3fv(en[5][6]); glTexCoord2fv(tep[5][6]); glVertex3fv(ep[5][6]);
	glNormal3fv(en[4][7]); glTexCoord2fv(tep[4][7]); glVertex3fv(ep[4][7]);
	glNormal3fv(en[5][7]); glTexCoord2fv(tep[5][7]); glVertex3fv(ep[5][7]);
	glNormal3fv(en[4][8]); glTexCoord2fv(tep[4][8]); glVertex3fv(ep[4][8]);
	glNormal3fv(en[5][8]); glTexCoord2fv(tep[5][8]); glVertex3fv(ep[5][8]);
	glEnd();
	glBegin(GL_TRIANGLE_STRIP);
	glNormal3fv(en[5][0]); glTexCoord2fv(tep[5][0]); glVertex3fv(ep[5][0]);
	glNormal3fv(en[6][0]); glTexCoord2fv(tep[6][0]); glVertex3fv(ep[6][0]);
	glNormal3fv(en[5][1]); glTexCoord2fv(tep[5][1]); glVertex3fv(ep[5][1]);
	glNormal3fv(en[6][1]); glTexCoord2fv(tep[6][1]); glVertex3fv(ep[6][1]);
	glNormal3fv(en[5][2]); glTexCoord2fv(tep[5][2]); glVertex3fv(ep[5][2]);
	glNormal3fv(en[6][2]); glTexCoord2fv(tep[6][2]); glVertex3fv(ep[6][2]);
	glNormal3fv(en[5][3]); glTexCoord2fv(tep[5][3]); glVertex3fv(ep[5][3]);
	glNormal3fv(en[6][3]); glTexCoord2fv(tep[6][3]); glVertex3fv(ep[6][3]);
	glNormal3fv(en[5][4]); glTexCoord2fv(tep[5][4]); glVertex3fv(ep[5][4]);
	glNormal3fv(en[6][4]); glTexCoord2fv(tep[6][4]); glVertex3fv(ep[6][4]);
	glNormal3fv(en[5][5]); glTexCoord2fv(tep[5][5]); glVertex3fv(ep[5][5]);
	glNormal3fv(en[6][5]); glTexCoord2fv(tep[6][5]); glVertex3fv(ep[6][5]);
	glNormal3fv(en[5][6]); glTexCoord2fv(tep[5][6]); glVertex3fv(ep[5][6]);
	glNormal3fv(en[6][6]); glTexCoord2fv(tep[6][6]); glVertex3fv(ep[6][6]);
	glNormal3fv(en[5][7]); glTexCoord2fv(tep[5][7]); glVertex3fv(ep[5][7]);
	glNormal3fv(en[6][7]); glTexCoord2fv(tep[6][7]); glVertex3fv(ep[6][7]);
	glNormal3fv(en[5][8]); glTexCoord2fv(tep[5][8]); glVertex3fv(ep[5][8]);
	glNormal3fv(en[6][8]); glTexCoord2fv(tep[6][8]); glVertex3fv(ep[6][8]);
	glEnd();

	glEndList();
}

static void BuildLogo(void)
{

	glNewList(logo, GL_COMPILE);

	glTranslatef(5.5, -3.5, 4.5);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -5.0);
	glCallList(singleCylinder);
	BendRight();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -5.0);
	glCallList(singleCylinder);
	BendLeft();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -5.0);
	glCallList(singleCylinder);
	BendRight();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -5.0);
	glCallList(singleCylinder);
	BendLeft();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -5.0);
	glCallList(singleCylinder);
	BendRight();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -7.0);
	glCallList(doubleCylinder);
	BendForward();
	glCallList(elbow);
	glTranslatef(0.0, 0.0, -5.0);
	glCallList(singleCylinder);
	BendLeft();
	glCallList(elbow);

	glEndList();
}

static void BuildLists(void)
{

	singleCylinder = glGenLists(1);
	doubleCylinder = glGenLists(1);
	elbow = glGenLists(1);
	logo = glGenLists(1);

	BuildSingleCylinder();
	BuildDoubleCylinder();
	BuildElbow();
	BuildLogo();
}

static void Init(void)
{
	static float ambient[] = {0.1, 0.1, 0.1, 1.0};
	static float diffuse[] = {0.5, 1.0, 1.0, 1.0};
	static float position[] = {90.0, 90.0, 150.0, 0.0};
	static float front_mat_shininess[] = {30.0};
	static float front_mat_specular[] = {0.2, 0.2, 0.2, 1.0};
	static float front_mat_diffuse[] = {0.5, 0.28, 0.38, 1.0};
	static float back_mat_shininess[] = {50.0};
	static float back_mat_specular[] = {0.5, 0.5, 0.2, 1.0};
	static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
	static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
	static float lmodel_twoside[] = {GL_TRUE};

	glClearColor(0.0, 0.0, 0.0, 0.0);

	glFrontFace(GL_CW);

	glEnable(GL_DEPTH_TEST);

	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
	glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
	glLightfv(GL_LIGHT0, GL_POSITION, position);
	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);

	glMaterialfv(GL_FRONT, GL_SHININESS, front_mat_shininess);
	glMaterialfv(GL_FRONT, GL_SPECULAR, front_mat_specular);
	glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
	glMaterialfv(GL_BACK, GL_SHININESS, back_mat_shininess);
	glMaterialfv(GL_BACK, GL_SPECULAR, back_mat_specular);
	glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);

	glEnable(GL_CLIP_PLANE0);

    glEnable(GL_TEXTURE_2D);
	glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, repeat);
	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, repeat);
	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, nearest);
	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, nearest);
	glTexImage2D(GL_TEXTURE_2D, 0, 3, CHECKIMAGEWIDTH, CHECKIMAGEHEIGHT, 0,
			GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)checkImage);
	

	glCullFace(GL_BACK);
	glEnable(GL_CULL_FACE);

	BuildLists();

	dithering = GL_TRUE;
	shade = GL_TRUE;
	doStipple = GL_FALSE;
	polyMode = GL_BACK;
}

static void Reshape(int width, int height)
{
	glViewport(0, 0, (GLint)width, (GLint)height);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(90, 1.0, 1.0, 200.0);
	glMatrixMode(GL_MODELVIEW);
}

static void Key2(int key, int x, int y)
{
	(void) x;
	(void) y;
	switch (key) {
	case GLUT_KEY_LEFT:
		yRotation += 0.5;
		break;
	case GLUT_KEY_RIGHT:
		yRotation -= 0.5;
		break;
	case GLUT_KEY_UP:
		plane[3] += 2.0;
		break;
	case GLUT_KEY_DOWN:
		plane[3] -= 2.0;
		break;
	default:
		return;
	}

	glutPostRedisplay();
}

static void Key(unsigned char key, int x, int y)
{
	(void) x;
	(void) y;
	switch (key) {
	case 27:
		exit(1);

	case 'Z':
		zTranslation -= 1.0;
		break;
	case 'z':
		zTranslation += 1.0;
		break;

	case '1':
		glPolygonMode(polyMode, GL_POINT);
		break;
	case '2':
		glPolygonMode(polyMode, GL_LINE);
		break;
	case '3':
		glPolygonMode(polyMode, GL_FILL);
		break;
	case 'p':
		switch (polyMode) {
		case GL_BACK:
			polyMode = GL_FRONT;
			printf("PolygonMode GL_FRONT\n");
			break;
		case GL_FRONT:
			polyMode = GL_FRONT_AND_BACK;
			printf("PolygonMode GL_FRONT_AND_BACK\n");
			break;
		case GL_FRONT_AND_BACK:
			polyMode = GL_BACK;
			printf("PolygonMode GL_BACK\n");
			break;
		default:
			break;
		}
		break;

		case '4':
			glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST);
			break;
		case '5':
			glEnable(GL_POLYGON_SMOOTH);
			glBlendFunc(GL_SRC_ALPHA, GL_ONE);
			glEnable(GL_BLEND);
			glDisable(GL_DEPTH_TEST);
			break;
		case '6':
			glDisable(GL_POLYGON_SMOOTH);
			glBlendFunc(GL_ONE, GL_ZERO);
			glDisable(GL_BLEND);
			glEnable(GL_DEPTH_TEST);
			break;

		case '8':
			dithering = !dithering;
			(dithering) ? glEnable(GL_DITHER) : glDisable(GL_DITHER);
			break;

		case '9':
			doStipple = !doStipple;
			if (doStipple) {
				glPolygonStipple(stipple);
				glEnable(GL_POLYGON_STIPPLE);
			} else {
				glDisable(GL_POLYGON_STIPPLE);
			}
			break;

		case '0':
			shade = !shade;
			(shade) ? glShadeModel(GL_SMOOTH) : glShadeModel(GL_FLAT);
			break;

		case 'q':
			glDisable(GL_CULL_FACE);
			printf("disable culling\n");
			break;
		case 'w':
			glEnable(GL_CULL_FACE);
			glCullFace(GL_FRONT);
			printf("enable front face culling\n");
			break;
		case 'e':
			glEnable(GL_CULL_FACE);
			glCullFace(GL_BACK);
			printf("enable back face culling\n");
			break;

		case 'r':
			glFrontFace(GL_CW);
			break;
		case 't': 
			glFrontFace(GL_CCW);
			break;
		case 'y':
			glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
			glPixelStorei(GL_UNPACK_LSB_FIRST, 0);
			glPolygonStipple(stipple);
			break;
		case 'u':
			glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
			glPixelStorei(GL_UNPACK_LSB_FIRST, 1);
			glPolygonStipple(stipple);
			break;

		case 'a':
			glEnable(GL_TEXTURE_2D);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, repeat);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, repeat);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, nearest);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, nearest);
			glTexImage2D(GL_TEXTURE_2D, 0, 4, BRICKIMAGEWIDTH,
					BRICKIMAGEHEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE,
					(GLvoid *)brickImage);
			break;
		case 's':
			glEnable(GL_TEXTURE_2D);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, repeat);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, repeat);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, nearest);
			glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, nearest);
			glTexImage2D(GL_TEXTURE_2D, 0, 3, CHECKIMAGEWIDTH,
					CHECKIMAGEHEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE,
					(GLvoid *)checkImage);
			break;
		case 'd':
			glDisable(GL_TEXTURE_2D);
			break;

		case 'f':
			glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
			break;
		case 'g':
			glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, modulate);
			break;

		case 'n':
			/* added by BrianP */
			noDraw = !noDraw;
			if (noDraw) {
				glDrawBuffer( GL_NONE );
			}
			else {
				if (doubleBuffer) {
					glDrawBuffer( GL_BACK );
				}
				else {
					glDrawBuffer( GL_FRONT );
				}
			}
			break;

		case 'l':
			/* Line Smooth - added by BrianP */
			LineSmooth = !LineSmooth;
			if (LineSmooth) {
				glEnable(GL_LINE_SMOOTH);
				glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
				glEnable(GL_BLEND);
			}
			else {
				glDisable(GL_LINE_SMOOTH);
				glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
				glDisable(GL_BLEND);
			}
			break;
		default:
			return;
	}

	glutPostRedisplay();
}

static void Draw(void)
{

	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

	glPushMatrix();

	glTranslatef(0, 0, zTranslation);
	glRotatef(30.0, 1, 0, 0);
	glRotatef(yRotation, 0, 1, 0);
	glClipPlane(GL_CLIP_PLANE0, plane);
	glCallList(logo);

	glPopMatrix();

	glFlush();

	if (doubleBuffer) {
		glutSwapBuffers();
	}
}

static GLenum Args(int argc, char **argv)
{
	GLint i;

	doubleBuffer = GL_FALSE;

	for (i = 1; i < argc; i++) {
		if (strcmp(argv[i], "-sb") == 0) {
			doubleBuffer = GL_FALSE;
		} else if (strcmp(argv[i], "-db") == 0) {
			doubleBuffer = GL_TRUE;
		} else {
			printf("%s (Bad option).\n", argv[i]);
			return GL_FALSE;
		}
	}
	return GL_TRUE;
}

int main(int argc, char **argv)
{
	unsigned int type;

	glutInit(&argc, argv);

	if (Args(argc, argv) == GL_FALSE) {
		exit(1);
	}

	glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);

	type = GLUT_DEPTH;
	type |= GLUT_RGB;
	type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
	glutInitDisplayMode(type);

	if (glutCreateWindow("Logo Test") == GL_FALSE) {
		exit(1);
	}

	Init();

	glutReshapeFunc(Reshape);
	glutKeyboardFunc(Key);
	glutSpecialFunc(Key2);
	glutDisplayFunc(Draw);
	glutMainLoop();
	return 0;
}