1015 lines
17 KiB
C
1015 lines
17 KiB
C
/*
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* Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the name of
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* Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
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* ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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/* BEP: renamed "nearest" as "nnearest" to avoid math.h collision on AIX */
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include <stdlib.h>
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#include <GL/glut.h>
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#include "readtex.h"
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#ifndef PI
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#define PI 3.14159265358979323846
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#endif
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GLenum doubleBuffer;
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int W = 400, H = 400;
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char *imageFileName = "../images/reflect.rgb";
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float *minFilter, *magFilter, *sWrapMode, *tWrapMode;
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float decal[] = {GL_DECAL};
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float modulate[] = {GL_MODULATE};
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float repeat[] = {GL_REPEAT};
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float clamp[] = {GL_CLAMP};
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float nnearest[] = {GL_NEAREST};
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float linear[] = {GL_LINEAR};
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float nearest_mipmap_nearest[] = {GL_NEAREST_MIPMAP_NEAREST};
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float nearest_mipmap_linear[] = {GL_NEAREST_MIPMAP_LINEAR};
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float linear_mipmap_nearest[] = {GL_LINEAR_MIPMAP_NEAREST};
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float linear_mipmap_linear[] = {GL_LINEAR_MIPMAP_LINEAR};
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GLint sphereMap[] = {GL_SPHERE_MAP};
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float xRotation = 0.0, yRotation = 0.0;
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float zTranslate = -3.0;
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GLenum autoRotate = GL_TRUE;
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GLboolean isLit = GL_TRUE;
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GLboolean isFogged = GL_FALSE;
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GLboolean doTexture = GL_TRUE;
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float *textureEnvironment = modulate;
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int cube, cage, cylinder, torus, genericObject;
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float c[6][4][4][3] = {
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{
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{
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{
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1.0, 1.0, -1.0
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},
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{
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0.0, 1.0, -1.0
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},
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{
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0.0, 0.0, -1.0
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},
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{
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1.0, 0.0, -1.0
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},
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},
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{
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{
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0.0, 1.0, -1.0
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},
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{
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-1.0, 1.0, -1.0
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},
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{
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-1.0, 0.0, -1.0
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},
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{
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0.0, 0.0, -1.0
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},
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},
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{
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{
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0.0, 0.0, -1.0
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},
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{
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-1.0, 0.0, -1.0
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},
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{
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-1.0, -1.0, -1.0
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},
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{
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0.0, -1.0, -1.0
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},
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},
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{
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{
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1.0, 0.0, -1.0
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},
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{
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0.0, 0.0, -1.0
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},
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{
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0.0, -1.0, -1.0
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},
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{
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1.0, -1.0, -1.0
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},
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},
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},
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{
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{
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{
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1.0, 1.0, 1.0
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},
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{
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1.0, 1.0, 0.0
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},
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{
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1.0, 0.0, 0.0
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},
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{
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1.0, 0.0, 1.0
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},
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},
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{
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{
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1.0, 1.0, 0.0
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},
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{
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1.0, 1.0, -1.0
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},
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{
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1.0, 0.0, -1.0
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},
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{
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1.0, 0.0, 0.0
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},
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},
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{
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{
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1.0, 0.0, -1.0
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},
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{
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1.0, -1.0, -1.0
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},
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{
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1.0, -1.0, 0.0
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},
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{
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1.0, 0.0, 0.0
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},
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},
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{
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{
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1.0, 0.0, 0.0
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},
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{
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1.0, -1.0, 0.0
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},
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{
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1.0, -1.0, 1.0
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},
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{
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1.0, 0.0, 1.0
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},
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},
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},
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{
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{
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{
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-1.0, 1.0, 1.0
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},
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{
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0.0, 1.0, 1.0
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},
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{
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0.0, 0.0, 1.0
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},
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{
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-1.0, 0.0, 1.0
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},
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},
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{
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{
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0.0, 1.0, 1.0
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},
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{
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1.0, 1.0, 1.0
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},
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{
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1.0, 0.0, 1.0
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},
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{
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0.0, 0.0, 1.0
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},
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},
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{
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{
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1.0, 0.0, 1.0
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},
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{
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1.0, -1.0, 1.0
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},
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{
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0.0, -1.0, 1.0
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},
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{
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0.0, 0.0, 1.0
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},
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},
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{
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{
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0.0, -1.0, 1.0
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},
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{
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-1.0, -1.0, 1.0
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},
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{
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-1.0, 0.0, 1.0
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},
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{
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0.0, 0.0, 1.0
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},
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},
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},
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{
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{
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{
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-1.0, 1.0, -1.0
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},
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{
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-1.0, 1.0, 0.0
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},
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{
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-1.0, 0.0, 0.0
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},
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{
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-1.0, 0.0, -1.0
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},
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},
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{
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{
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-1.0, 1.0, 0.0
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},
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{
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-1.0, 1.0, 1.0
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},
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{
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-1.0, 0.0, 1.0
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},
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{
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-1.0, 0.0, 0.0
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},
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},
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{
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{
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-1.0, 0.0, 1.0
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},
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{
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-1.0, -1.0, 1.0
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},
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{
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-1.0, -1.0, 0.0
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},
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{
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-1.0, 0.0, 0.0
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},
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},
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{
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{
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-1.0, -1.0, 0.0
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},
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{
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-1.0, -1.0, -1.0
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},
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{
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-1.0, 0.0, -1.0
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},
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{
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-1.0, 0.0, 0.0
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},
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},
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},
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{
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{
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{
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-1.0, 1.0, 1.0
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},
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{
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-1.0, 1.0, 0.0
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},
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{
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0.0, 1.0, 0.0
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},
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{
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0.0, 1.0, 1.0
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},
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},
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{
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{
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-1.0, 1.0, 0.0
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},
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{
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-1.0, 1.0, -1.0
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},
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{
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0.0, 1.0, -1.0
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},
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{
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0.0, 1.0, 0.0
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},
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},
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{
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{
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0.0, 1.0, -1.0
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},
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{
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1.0, 1.0, -1.0
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},
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{
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1.0, 1.0, 0.0
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},
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{
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0.0, 1.0, 0.0
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},
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},
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{
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{
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1.0, 1.0, 0.0
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},
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{
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1.0, 1.0, 1.0
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},
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{
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0.0, 1.0, 1.0
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},
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{
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0.0, 1.0, 0.0
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},
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},
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},
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{
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{
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{
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-1.0, -1.0, -1.0
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},
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{
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-1.0, -1.0, 0.0
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},
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{
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0.0, -1.0, 0.0
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},
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{
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0.0, -1.0, -1.0
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},
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},
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{
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{
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-1.0, -1.0, 0.0
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},
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{
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-1.0, -1.0, 1.0
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},
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{
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0.0, -1.0, 1.0
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},
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{
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0.0, -1.0, 0.0
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},
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},
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{
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{
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0.0, -1.0, 1.0
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},
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{
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1.0, -1.0, 1.0
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},
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{
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1.0, -1.0, 0.0
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},
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{
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0.0, -1.0, 0.0
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},
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},
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{
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{
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1.0, -1.0, 0.0
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},
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{
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1.0, -1.0, -1.0
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},
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{
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0.0, -1.0, -1.0
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},
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{
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0.0, -1.0, 0.0
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},
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},
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}
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};
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float n[6][3] = {
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{
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0.0, 0.0, -1.0
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},
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{
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1.0, 0.0, 0.0
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},
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{
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0.0, 0.0, 1.0
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},
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{
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-1.0, 0.0, 0.0
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},
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{
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0.0, 1.0, 0.0
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},
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{
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0.0, -1.0, 0.0
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}
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};
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GLfloat identity[16] = {
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1, 0, 0, 0,
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0, 1, 0, 0,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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void BuildCylinder(int numEdges)
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{
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int i, top = 1.0, bottom = -1.0;
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float x[100], y[100], angle;
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for (i = 0; i <= numEdges; i++) {
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angle = i * 2.0 * PI / numEdges;
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x[i] = cos(angle); /* was cosf() */
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y[i] = sin(angle); /* was sinf() */
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}
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glNewList(cylinder, GL_COMPILE);
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glBegin(GL_TRIANGLE_STRIP);
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for (i = 0; i <= numEdges; i++) {
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glNormal3f(x[i], y[i], 0.0);
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glVertex3f(x[i], y[i], bottom);
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glVertex3f(x[i], y[i], top);
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}
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glEnd();
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glBegin(GL_TRIANGLE_FAN);
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glNormal3f(0.0, 0.0, 1.0);
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glVertex3f(0.0, 0.0, top);
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for (i = 0; i <= numEdges; i++) {
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glVertex3f(x[i], -y[i], top);
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}
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glEnd();
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glBegin(GL_TRIANGLE_FAN);
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glNormal3f(0.0, 0.0, -1.0);
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glVertex3f(0.0, 0.0, bottom);
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for (i = 0; i <= numEdges; i++) {
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glVertex3f(x[i], y[i], bottom);
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}
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glEnd();
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glEndList();
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}
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void BuildTorus(float rc, int numc, float rt, int numt)
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{
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int i, j, k;
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double s, t;
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double x, y, z;
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double pi, twopi;
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pi = 3.14159265358979323846;
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twopi = 2.0 * pi;
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glNewList(torus, GL_COMPILE);
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for (i = 0; i < numc; i++) {
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glBegin(GL_QUAD_STRIP);
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for (j = 0; j <= numt; j++) {
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for (k = 0; k <= 1; k++) {
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s = (i + k) % numc + 0.5;
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t = j % numt;
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x = cos(t*twopi/numt) * cos(s*twopi/numc);
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y = sin(t*twopi/numt) * cos(s*twopi/numc);
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z = sin(s*twopi/numc);
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glNormal3f(x, y, z);
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x = (rt + rc * cos(s*twopi/numc)) * cos(t*twopi/numt);
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y = (rt + rc * cos(s*twopi/numc)) * sin(t*twopi/numt);
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z = rc * sin(s*twopi/numc);
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glVertex3f(x, y, z);
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}
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}
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glEnd();
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}
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glEndList();
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}
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|
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void BuildCage(void)
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{
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int i;
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float inc;
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float right, left, top, bottom, front, back;
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front = 0.0;
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back = -8.0;
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|
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left = -4.0;
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bottom = -4.0;
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right = 4.0;
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top = 4.0;
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|
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inc = 2.0 * 4.0 * 0.1;
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|
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glNewList(cage, GL_COMPILE);
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for (i = 0; i < 10; i++) {
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|
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/*
|
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** Back
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*/
|
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glBegin(GL_LINES);
|
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glVertex3f(left+i*inc, top, back);
|
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glVertex3f(left+i*inc, bottom, back);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right, bottom+i*inc, back);
|
|
glVertex3f(left, bottom+i*inc, back);
|
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glEnd();
|
|
|
|
/*
|
|
** Front
|
|
*/
|
|
glBegin(GL_LINES);
|
|
glVertex3f(left+i*inc, top, front);
|
|
glVertex3f(left+i*inc, bottom, front);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right, bottom+i*inc, front);
|
|
glVertex3f(left, bottom+i*inc, front);
|
|
glEnd();
|
|
|
|
/*
|
|
** Left
|
|
*/
|
|
glBegin(GL_LINES);
|
|
glVertex3f(left, bottom+i*inc, front);
|
|
glVertex3f(left, bottom+i*inc, back);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex3f(left, top, back+i*inc);
|
|
glVertex3f(left, bottom, back+i*inc);
|
|
glEnd();
|
|
|
|
/*
|
|
** Right
|
|
*/
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right, top-i*inc, front);
|
|
glVertex3f(right, top-i*inc, back);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right, top, back+i*inc);
|
|
glVertex3f(right, bottom, back+i*inc);
|
|
glEnd();
|
|
|
|
/*
|
|
** Top
|
|
*/
|
|
glBegin(GL_LINES);
|
|
glVertex3f(left+i*inc, top, front);
|
|
glVertex3f(left+i*inc, top, back);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right, top, back+i*inc);
|
|
glVertex3f(left, top, back+i*inc);
|
|
glEnd();
|
|
|
|
/*
|
|
** Bottom
|
|
*/
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right-i*inc, bottom, front);
|
|
glVertex3f(right-i*inc, bottom, back);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex3f(right, bottom, back+i*inc);
|
|
glVertex3f(left, bottom, back+i*inc);
|
|
glEnd();
|
|
}
|
|
glEndList();
|
|
}
|
|
|
|
void BuildCube(void)
|
|
{
|
|
int i, j;
|
|
|
|
glNewList(cube, GL_COMPILE);
|
|
for (i = 0; i < 6; i++) {
|
|
for (j = 0; j < 4; j++) {
|
|
glNormal3fv(n[i]);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3fv(c[i][j][0]);
|
|
glVertex3fv(c[i][j][1]);
|
|
glVertex3fv(c[i][j][2]);
|
|
glVertex3fv(c[i][j][3]);
|
|
glEnd();
|
|
}
|
|
}
|
|
glEndList();
|
|
}
|
|
|
|
void BuildLists(void)
|
|
{
|
|
|
|
cube = glGenLists(1);
|
|
BuildCube();
|
|
|
|
cage = glGenLists(2);
|
|
BuildCage();
|
|
|
|
cylinder = glGenLists(3);
|
|
BuildCylinder(60);
|
|
|
|
torus = glGenLists(4);
|
|
BuildTorus(0.65, 20, .85, 65);
|
|
|
|
genericObject = torus;
|
|
}
|
|
|
|
void SetDefaultSettings(void)
|
|
{
|
|
|
|
magFilter = nnearest;
|
|
minFilter = nnearest;
|
|
sWrapMode = repeat;
|
|
tWrapMode = repeat;
|
|
textureEnvironment = modulate;
|
|
autoRotate = GL_TRUE;
|
|
}
|
|
|
|
unsigned char *AlphaPadImage(int bufSize, unsigned char *inData, int alpha)
|
|
{
|
|
unsigned char *outData, *out_ptr, *in_ptr;
|
|
int i;
|
|
|
|
outData = (unsigned char *) malloc(bufSize * 4);
|
|
out_ptr = outData;
|
|
in_ptr = inData;
|
|
|
|
for (i = 0; i < bufSize; i++) {
|
|
*out_ptr++ = *in_ptr++;
|
|
*out_ptr++ = *in_ptr++;
|
|
*out_ptr++ = *in_ptr++;
|
|
*out_ptr++ = alpha;
|
|
}
|
|
|
|
free (inData);
|
|
return outData;
|
|
}
|
|
|
|
void Init(void)
|
|
{
|
|
float ambient[] = {0.0, 0.0, 0.0, 1.0};
|
|
float diffuse[] = {1.0, 1.0, 1.0, 1.0};
|
|
float specular[] = {1.0, 1.0, 1.0, 1.0};
|
|
float position[] = {0.0, 0.0, 4.0, 0.0};
|
|
float fog_color[] = {0.0, 0.0, 0.0, 1.0};
|
|
float mat_ambient[] = {0.0, 0.0, 0.0, 1.0};
|
|
float mat_shininess[] = {90.0};
|
|
float mat_specular[] = {1.0, 1.0, 1.0, 1.0};
|
|
float mat_diffuse[] = {0.8, 0.8, 0.8, 1.0};
|
|
float lmodel_ambient[] = {0.2, 0.2, 0.2, 1.0};
|
|
float lmodel_twoside[] = {GL_TRUE};
|
|
int w, h;
|
|
GLenum format;
|
|
GLubyte *image;
|
|
|
|
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
|
|
|
|
SetDefaultSettings();
|
|
|
|
image = LoadRGBImage(imageFileName, &w, &h, &format);
|
|
if (!image) {
|
|
printf("Error: couldn't load %s\n", imageFileName);
|
|
exit(1);
|
|
}
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
|
gluBuild2DMipmaps(GL_TEXTURE_2D, format, w, h,
|
|
GL_RGB, GL_UNSIGNED_BYTE, image);
|
|
|
|
free(image);
|
|
|
|
glFogf(GL_FOG_DENSITY, 0.125);
|
|
glFogi(GL_FOG_MODE, GL_LINEAR);
|
|
glFogf(GL_FOG_START, 4.0);
|
|
glFogf(GL_FOG_END, 8.5);
|
|
glFogfv(GL_FOG_COLOR, fog_color);
|
|
|
|
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
|
|
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
|
|
glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
|
|
glLightfv(GL_LIGHT0, GL_POSITION, position);
|
|
glEnable(GL_LIGHT0);
|
|
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_diffuse);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, mat_ambient);
|
|
|
|
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
|
|
glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
|
|
glShadeModel(GL_SMOOTH);
|
|
|
|
|
|
glClearColor(0.0, 0.0, 0.0, 0.0);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
glFrontFace(GL_CW);
|
|
glEnable(GL_CULL_FACE);
|
|
glCullFace(GL_BACK);
|
|
|
|
glTexGeniv(GL_S, GL_TEXTURE_GEN_MODE, sphereMap);
|
|
glTexGeniv(GL_T, GL_TEXTURE_GEN_MODE, sphereMap);
|
|
glEnable(GL_TEXTURE_GEN_S);
|
|
glEnable(GL_TEXTURE_GEN_T);
|
|
|
|
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
|
|
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
|
|
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, sWrapMode);
|
|
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tWrapMode);
|
|
|
|
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, textureEnvironment);
|
|
|
|
BuildLists();
|
|
}
|
|
|
|
void ReInit(void)
|
|
{
|
|
if (genericObject == torus) {
|
|
glEnable(GL_DEPTH_TEST);
|
|
} else {
|
|
glDisable(GL_DEPTH_TEST);
|
|
}
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
#if 0
|
|
if (isFogged) {
|
|
textureEnvironment = modulate;
|
|
}
|
|
#endif
|
|
|
|
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
|
|
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
|
|
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, textureEnvironment);
|
|
}
|
|
|
|
void Draw(void)
|
|
{
|
|
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
|
|
|
|
/* draw cage */
|
|
if (isFogged)
|
|
glEnable(GL_FOG);
|
|
else
|
|
glDisable(GL_FOG);
|
|
glColor3f(1, 1, 1);
|
|
glDisable(GL_LIGHTING);
|
|
glDisable(GL_TEXTURE_2D);
|
|
glCallList(cage);
|
|
|
|
/* draw object */
|
|
if (isLit)
|
|
glEnable(GL_LIGHTING);
|
|
else
|
|
glColor3f(1.0, 0.5, 0.2);
|
|
if (doTexture)
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glPushMatrix();
|
|
glTranslatef(0.0, 0.0, zTranslate);
|
|
glRotatef(xRotation, 1, 0, 0);
|
|
glRotatef(yRotation, 0, 1, 0);
|
|
glCallList(genericObject);
|
|
glPopMatrix();
|
|
|
|
glFlush();
|
|
glutSwapBuffers();
|
|
}
|
|
|
|
void Reshape(int width, int height)
|
|
{
|
|
W = width;
|
|
H = height;
|
|
ReInit();
|
|
glViewport( 0, 0, width, height ); /*new*/
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glFrustum(-0.2, 0.2, -0.2, 0.2, 0.15, 9.0);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
}
|
|
|
|
void Idle(void)
|
|
{
|
|
static double t0 = -1.;
|
|
double t, dt;
|
|
t = glutGet(GLUT_ELAPSED_TIME) / 1000.;
|
|
if (t0 < 0.)
|
|
t0 = t;
|
|
dt = t - t0;
|
|
t0 = t;
|
|
|
|
xRotation += .75*60.*dt;
|
|
yRotation += .375*60.*dt;
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
void Key2(int key, int x, int y)
|
|
{
|
|
|
|
switch (key) {
|
|
case GLUT_KEY_LEFT:
|
|
yRotation -= 0.5;
|
|
autoRotate = GL_FALSE;
|
|
ReInit();
|
|
break;
|
|
case GLUT_KEY_RIGHT:
|
|
yRotation += 0.5;
|
|
autoRotate = GL_FALSE;
|
|
ReInit();
|
|
break;
|
|
case GLUT_KEY_UP:
|
|
xRotation -= 0.5;
|
|
autoRotate = GL_FALSE;
|
|
ReInit();
|
|
break;
|
|
case GLUT_KEY_DOWN:
|
|
xRotation += 0.5;
|
|
autoRotate = GL_FALSE;
|
|
ReInit();
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
void Key(unsigned char key, int x, int y)
|
|
{
|
|
|
|
switch (key) {
|
|
case 27:
|
|
/* free(image->data);*/
|
|
exit(1);
|
|
|
|
case 'a':
|
|
autoRotate = !autoRotate;
|
|
if (autoRotate)
|
|
glutIdleFunc(Idle);
|
|
else
|
|
glutIdleFunc(NULL);
|
|
|
|
ReInit();
|
|
break;
|
|
case 'o':
|
|
if (genericObject == cube) {
|
|
genericObject = cylinder;
|
|
}
|
|
else if (genericObject == cylinder) {
|
|
genericObject = torus;
|
|
}
|
|
else {
|
|
genericObject = cube;
|
|
}
|
|
ReInit();
|
|
break;
|
|
case 'd':
|
|
textureEnvironment = decal;
|
|
ReInit();
|
|
break;
|
|
case 'm':
|
|
textureEnvironment = modulate;
|
|
ReInit();
|
|
break;
|
|
case 'l':
|
|
isLit = !isLit;
|
|
ReInit();
|
|
break;
|
|
case 'f':
|
|
isFogged = !isFogged;
|
|
ReInit();
|
|
break;
|
|
case 't':
|
|
doTexture = !doTexture;
|
|
ReInit();
|
|
break;
|
|
case '0':
|
|
magFilter = nnearest;
|
|
ReInit();
|
|
break;
|
|
case '1':
|
|
magFilter = linear;
|
|
ReInit();
|
|
break;
|
|
case '2':
|
|
minFilter = nnearest;
|
|
ReInit();
|
|
break;
|
|
case '3':
|
|
minFilter = linear;
|
|
ReInit();
|
|
break;
|
|
case '4':
|
|
minFilter = nearest_mipmap_nearest;
|
|
ReInit();
|
|
break;
|
|
case '5':
|
|
minFilter = nearest_mipmap_linear;
|
|
ReInit();
|
|
break;
|
|
case '6':
|
|
minFilter = linear_mipmap_nearest;
|
|
ReInit();
|
|
break;
|
|
case '7':
|
|
minFilter = linear_mipmap_linear;
|
|
ReInit();
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
GLenum Args(int argc, char **argv)
|
|
{
|
|
GLint i;
|
|
|
|
doubleBuffer = GL_TRUE;
|
|
|
|
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 if (strcmp(argv[i], "-f") == 0) {
|
|
if (i+1 >= argc || argv[i+1][0] == '-') {
|
|
printf("-f (No file name).\n");
|
|
return GL_FALSE;
|
|
} else {
|
|
imageFileName = argv[++i];
|
|
}
|
|
} else {
|
|
printf("%s (Bad option).\n", argv[i]);
|
|
return GL_FALSE;
|
|
}
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
GLenum type;
|
|
|
|
glutInit(&argc, argv);
|
|
|
|
if (Args(argc, argv) == GL_FALSE) {
|
|
exit(1);
|
|
}
|
|
|
|
if (imageFileName == 0) {
|
|
printf("No image file.\n");
|
|
exit(1);
|
|
}
|
|
|
|
glutInitWindowPosition(0, 0); glutInitWindowSize( W, H);
|
|
|
|
type = GLUT_RGB | GLUT_DEPTH;
|
|
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
|
|
glutInitDisplayMode(type);
|
|
|
|
if (glutCreateWindow("Texture Test") == GL_FALSE) {
|
|
exit(1);
|
|
}
|
|
|
|
Init();
|
|
|
|
glutReshapeFunc(Reshape);
|
|
glutKeyboardFunc(Key);
|
|
glutSpecialFunc(Key2);
|
|
glutDisplayFunc(Draw);
|
|
glutIdleFunc(Idle);
|
|
|
|
glutMainLoop();
|
|
return 0;
|
|
}
|