| /* |
| * 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. |
| */ |
| |
| /* BEP: renamed "nearest" as "nnearest" to avoid math.h collision on AIX */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <math.h> |
| #include <stdlib.h> |
| #include <GL/glut.h> |
| |
| |
| #define FALSE 0 |
| #define TRUE 1 |
| #ifndef PI |
| #define PI 3.14159265358979323846 |
| #endif |
| |
| |
| #include "loadppm.c" |
| |
| int rgb; /* unused */ |
| |
| #include "tkmap.c" |
| |
| GLenum doubleBuffer; |
| int W = 400, H = 400; |
| |
| char *imageFileName = 0; |
| PPMImage *image; |
| |
| int numComponents; |
| |
| float *minFilter, *magFilter, *sWrapMode, *tWrapMode; |
| float decal[] = {GL_DECAL}; |
| float modulate[] = {GL_MODULATE}; |
| float repeat[] = {GL_REPEAT}; |
| float clamp[] = {GL_CLAMP}; |
| float nnearest[] = {GL_NEAREST}; |
| float linear[] = {GL_LINEAR}; |
| float nearest_mipmap_nearest[] = {GL_NEAREST_MIPMAP_NEAREST}; |
| float nearest_mipmap_linear[] = {GL_NEAREST_MIPMAP_LINEAR}; |
| float linear_mipmap_nearest[] = {GL_LINEAR_MIPMAP_NEAREST}; |
| float linear_mipmap_linear[] = {GL_LINEAR_MIPMAP_LINEAR}; |
| GLint sphereMap[] = {GL_SPHERE_MAP}; |
| |
| float xRotation = 0.0, yRotation = 0.0; |
| float zTranslate = -4.0; |
| GLenum autoRotate = TRUE; |
| GLenum deepestColor = COLOR_GREEN; |
| GLenum isLit = TRUE; |
| GLenum isFogged = FALSE; |
| float *textureEnvironment = modulate; |
| |
| struct MipMap { |
| int width, height; |
| unsigned char *data; |
| }; |
| |
| int cube, cage, cylinder, torus, genericObject; |
| |
| float c[6][4][4][3] = { |
| { |
| { |
| { |
| 1.0, 1.0, -1.0 |
| }, |
| { |
| 0.0, 1.0, -1.0 |
| }, |
| { |
| 0.0, 0.0, -1.0 |
| }, |
| { |
| 1.0, 0.0, -1.0 |
| }, |
| }, |
| { |
| { |
| 0.0, 1.0, -1.0 |
| }, |
| { |
| -1.0, 1.0, -1.0 |
| }, |
| { |
| -1.0, 0.0, -1.0 |
| }, |
| { |
| 0.0, 0.0, -1.0 |
| }, |
| }, |
| { |
| { |
| 0.0, 0.0, -1.0 |
| }, |
| { |
| -1.0, 0.0, -1.0 |
| }, |
| { |
| -1.0, -1.0, -1.0 |
| }, |
| { |
| 0.0, -1.0, -1.0 |
| }, |
| }, |
| { |
| { |
| 1.0, 0.0, -1.0 |
| }, |
| { |
| 0.0, 0.0, -1.0 |
| }, |
| { |
| 0.0, -1.0, -1.0 |
| }, |
| { |
| 1.0, -1.0, -1.0 |
| }, |
| }, |
| }, |
| { |
| { |
| { |
| 1.0, 1.0, 1.0 |
| }, |
| { |
| 1.0, 1.0, 0.0 |
| }, |
| { |
| 1.0, 0.0, 0.0 |
| }, |
| { |
| 1.0, 0.0, 1.0 |
| }, |
| }, |
| { |
| { |
| 1.0, 1.0, 0.0 |
| }, |
| { |
| 1.0, 1.0, -1.0 |
| }, |
| { |
| 1.0, 0.0, -1.0 |
| }, |
| { |
| 1.0, 0.0, 0.0 |
| }, |
| }, |
| { |
| { |
| 1.0, 0.0, -1.0 |
| }, |
| { |
| 1.0, -1.0, -1.0 |
| }, |
| { |
| 1.0, -1.0, 0.0 |
| }, |
| { |
| 1.0, 0.0, 0.0 |
| }, |
| }, |
| { |
| { |
| 1.0, 0.0, 0.0 |
| }, |
| { |
| 1.0, -1.0, 0.0 |
| }, |
| { |
| 1.0, -1.0, 1.0 |
| }, |
| { |
| 1.0, 0.0, 1.0 |
| }, |
| }, |
| }, |
| { |
| { |
| { |
| -1.0, 1.0, 1.0 |
| }, |
| { |
| 0.0, 1.0, 1.0 |
| }, |
| { |
| 0.0, 0.0, 1.0 |
| }, |
| { |
| -1.0, 0.0, 1.0 |
| }, |
| }, |
| { |
| { |
| 0.0, 1.0, 1.0 |
| }, |
| { |
| 1.0, 1.0, 1.0 |
| }, |
| { |
| 1.0, 0.0, 1.0 |
| }, |
| { |
| 0.0, 0.0, 1.0 |
| }, |
| }, |
| { |
| { |
| 1.0, 0.0, 1.0 |
| }, |
| { |
| 1.0, -1.0, 1.0 |
| }, |
| { |
| 0.0, -1.0, 1.0 |
| }, |
| { |
| 0.0, 0.0, 1.0 |
| }, |
| }, |
| { |
| { |
| 0.0, -1.0, 1.0 |
| }, |
| { |
| -1.0, -1.0, 1.0 |
| }, |
| { |
| -1.0, 0.0, 1.0 |
| }, |
| { |
| 0.0, 0.0, 1.0 |
| }, |
| }, |
| }, |
| { |
| { |
| { |
| -1.0, 1.0, -1.0 |
| }, |
| { |
| -1.0, 1.0, 0.0 |
| }, |
| { |
| -1.0, 0.0, 0.0 |
| }, |
| { |
| -1.0, 0.0, -1.0 |
| }, |
| }, |
| { |
| { |
| -1.0, 1.0, 0.0 |
| }, |
| { |
| -1.0, 1.0, 1.0 |
| }, |
| { |
| -1.0, 0.0, 1.0 |
| }, |
| { |
| -1.0, 0.0, 0.0 |
| }, |
| }, |
| { |
| { |
| -1.0, 0.0, 1.0 |
| }, |
| { |
| -1.0, -1.0, 1.0 |
| }, |
| { |
| -1.0, -1.0, 0.0 |
| }, |
| { |
| -1.0, 0.0, 0.0 |
| }, |
| }, |
| { |
| { |
| -1.0, -1.0, 0.0 |
| }, |
| { |
| -1.0, -1.0, -1.0 |
| }, |
| { |
| -1.0, 0.0, -1.0 |
| }, |
| { |
| -1.0, 0.0, 0.0 |
| }, |
| }, |
| }, |
| { |
| { |
| { |
| -1.0, 1.0, 1.0 |
| }, |
| { |
| -1.0, 1.0, 0.0 |
| }, |
| { |
| 0.0, 1.0, 0.0 |
| }, |
| { |
| 0.0, 1.0, 1.0 |
| }, |
| }, |
| { |
| { |
| -1.0, 1.0, 0.0 |
| }, |
| { |
| -1.0, 1.0, -1.0 |
| }, |
| { |
| 0.0, 1.0, -1.0 |
| }, |
| { |
| 0.0, 1.0, 0.0 |
| }, |
| }, |
| { |
| { |
| 0.0, 1.0, -1.0 |
| }, |
| { |
| 1.0, 1.0, -1.0 |
| }, |
| { |
| 1.0, 1.0, 0.0 |
| }, |
| { |
| 0.0, 1.0, 0.0 |
| }, |
| }, |
| { |
| { |
| 1.0, 1.0, 0.0 |
| }, |
| { |
| 1.0, 1.0, 1.0 |
| }, |
| { |
| 0.0, 1.0, 1.0 |
| }, |
| { |
| 0.0, 1.0, 0.0 |
| }, |
| }, |
| }, |
| { |
| { |
| { |
| -1.0, -1.0, -1.0 |
| }, |
| { |
| -1.0, -1.0, 0.0 |
| }, |
| { |
| 0.0, -1.0, 0.0 |
| }, |
| { |
| 0.0, -1.0, -1.0 |
| }, |
| }, |
| { |
| { |
| -1.0, -1.0, 0.0 |
| }, |
| { |
| -1.0, -1.0, 1.0 |
| }, |
| { |
| 0.0, -1.0, 1.0 |
| }, |
| { |
| 0.0, -1.0, 0.0 |
| }, |
| }, |
| { |
| { |
| 0.0, -1.0, 1.0 |
| }, |
| { |
| 1.0, -1.0, 1.0 |
| }, |
| { |
| 1.0, -1.0, 0.0 |
| }, |
| { |
| 0.0, -1.0, 0.0 |
| }, |
| }, |
| { |
| { |
| 1.0, -1.0, 0.0 |
| }, |
| { |
| 1.0, -1.0, -1.0 |
| }, |
| { |
| 0.0, -1.0, -1.0 |
| }, |
| { |
| 0.0, -1.0, 0.0 |
| }, |
| }, |
| } |
| }; |
| |
| float n[6][3] = { |
| { |
| 0.0, 0.0, -1.0 |
| }, |
| { |
| 1.0, 0.0, 0.0 |
| }, |
| { |
| 0.0, 0.0, 1.0 |
| }, |
| { |
| -1.0, 0.0, 0.0 |
| }, |
| { |
| 0.0, 1.0, 0.0 |
| }, |
| { |
| 0.0, -1.0, 0.0 |
| } |
| }; |
| |
| GLfloat identity[16] = { |
| 1, 0, 0, 0, |
| 0, 1, 0, 0, |
| 0, 0, 1, 0, |
| 0, 0, 0, 1, |
| }; |
| |
| |
| void BuildCylinder(int numEdges) |
| { |
| int i, top = 1.0, bottom = -1.0; |
| float x[100], y[100], angle; |
| |
| for (i = 0; i <= numEdges; i++) { |
| angle = i * 2.0 * PI / numEdges; |
| x[i] = cos(angle); /* was cosf() */ |
| y[i] = sin(angle); /* was sinf() */ |
| } |
| |
| glNewList(cylinder, GL_COMPILE); |
| glBegin(GL_TRIANGLE_STRIP); |
| for (i = 0; i <= numEdges; i++) { |
| glNormal3f(x[i], y[i], 0.0); |
| glVertex3f(x[i], y[i], bottom); |
| glVertex3f(x[i], y[i], top); |
| } |
| glEnd(); |
| glBegin(GL_TRIANGLE_FAN); |
| glNormal3f(0.0, 0.0, 1.0); |
| glVertex3f(0.0, 0.0, top); |
| for (i = 0; i <= numEdges; i++) { |
| glVertex3f(x[i], -y[i], top); |
| } |
| glEnd(); |
| glBegin(GL_TRIANGLE_FAN); |
| glNormal3f(0.0, 0.0, -1.0); |
| glVertex3f(0.0, 0.0, bottom); |
| for (i = 0; i <= numEdges; i++) { |
| glVertex3f(x[i], y[i], bottom); |
| } |
| glEnd(); |
| glEndList(); |
| } |
| |
| void BuildTorus(float rc, int numc, float rt, int numt) |
| { |
| int i, j, k; |
| double s, t; |
| double x, y, z; |
| double pi, twopi; |
| |
| pi = 3.14159265358979323846; |
| twopi = 2.0 * pi; |
| |
| glNewList(torus, GL_COMPILE); |
| for (i = 0; i < numc; i++) { |
| glBegin(GL_QUAD_STRIP); |
| for (j = 0; j <= numt; j++) { |
| for (k = 0; k <= 1; k++) { |
| s = (i + k) % numc + 0.5; |
| t = j % numt; |
| |
| x = cos(t*twopi/numt) * cos(s*twopi/numc); |
| y = sin(t*twopi/numt) * cos(s*twopi/numc); |
| z = sin(s*twopi/numc); |
| glNormal3f(x, y, z); |
| |
| x = (rt + rc * cos(s*twopi/numc)) * cos(t*twopi/numt); |
| y = (rt + rc * cos(s*twopi/numc)) * sin(t*twopi/numt); |
| z = rc * sin(s*twopi/numc); |
| glVertex3f(x, y, z); |
| } |
| } |
| glEnd(); |
| } |
| glEndList(); |
| } |
| |
| void BuildCage(void) |
| { |
| int i; |
| float inc; |
| float right, left, top, bottom, front, back; |
| |
| front = 0.0; |
| back = -8.0; |
| |
| left = -4.0; |
| bottom = -4.0; |
| right = 4.0; |
| top = 4.0; |
| |
| inc = 2.0 * 4.0 * 0.1; |
| |
| glNewList(cage, GL_COMPILE); |
| for (i = 0; i < 10; i++) { |
| |
| /* |
| ** Back |
| */ |
| glBegin(GL_LINES); |
| glVertex3f(left+i*inc, top, back); |
| glVertex3f(left+i*inc, bottom, back); |
| glEnd(); |
| glBegin(GL_LINES); |
| glVertex3f(right, bottom+i*inc, back); |
| glVertex3f(left, bottom+i*inc, back); |
| 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 SetDeepestColor(void) |
| { |
| GLint redBits, greenBits, blueBits; |
| |
| glGetIntegerv(GL_RED_BITS, &redBits); |
| glGetIntegerv(GL_GREEN_BITS, &greenBits); |
| glGetIntegerv(GL_BLUE_BITS, &blueBits); |
| |
| deepestColor = (redBits >= greenBits) ? COLOR_RED : COLOR_GREEN; |
| deepestColor = (deepestColor >= blueBits) ? deepestColor : COLOR_BLUE; |
| } |
| |
| void SetDefaultSettings(void) |
| { |
| |
| magFilter = nnearest; |
| minFilter = nnearest; |
| sWrapMode = repeat; |
| tWrapMode = repeat; |
| textureEnvironment = modulate; |
| autoRotate = 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[] = {0.0, 1.0, 0.0, 1.0}; |
| float specular[] = {1.0, 1.0, 1.0, 1.0}; |
| float position[] = {2.0, 2.0, 0.0, 1.0}; |
| 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[] = {1.0, 1.0, 1.0, 1.0}; |
| float lmodel_ambient[] = {0.0, 0.0, 0.0, 1.0}; |
| float lmodel_twoside[] = {GL_TRUE}; |
| |
| SetDeepestColor(); |
| SetDefaultSettings(); |
| |
| if (numComponents == 4) { |
| image = LoadPPM(imageFileName); |
| image->data = AlphaPadImage(image->sizeX*image->sizeY, |
| image->data, 128); |
| glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| gluBuild2DMipmaps(GL_TEXTURE_2D, numComponents, |
| image->sizeX, image->sizeY, |
| GL_RGBA, GL_UNSIGNED_BYTE, image->data); |
| } else { |
| image = LoadPPM(imageFileName); |
| glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| gluBuild2DMipmaps(GL_TEXTURE_2D, numComponents, |
| image->sizeX, image->sizeY, |
| GL_RGB, GL_UNSIGNED_BYTE, image->data); |
| } |
| |
| glFogf(GL_FOG_DENSITY, 0.125); |
| glFogi(GL_FOG_MODE, GL_LINEAR); |
| glFogf(GL_FOG_START, 4.0); |
| glFogf(GL_FOG_END, 9.0); |
| 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); |
| |
| 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); |
| |
| glEnable(GL_LIGHTING); |
| glEnable(GL_LIGHT0); |
| |
| glClearColor(0.0, 0.0, 0.0, 0.0); |
| glViewport(0, 0, W, H); |
| glEnable(GL_DEPTH_TEST); |
| |
| glFrontFace(GL_CW); |
| glEnable(GL_CULL_FACE); |
| glCullFace(GL_BACK); |
| |
| glEnable(GL_TEXTURE_2D); |
| 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); |
| } |
| if (isFogged) { |
| textureEnvironment = modulate; |
| } |
| |
| 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) |
| { |
| |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| glFrustum(-0.2, 0.2, -0.2, 0.2, 0.15, 9.0); |
| glMatrixMode(GL_MODELVIEW); |
| |
| glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| if (isFogged) { |
| glEnable(GL_FOG); |
| glColor3fv(RGBMap[deepestColor]); |
| } else { |
| glColor3fv(RGBMap[COLOR_WHITE]); |
| } |
| glDisable(GL_LIGHTING); |
| glDisable(GL_LIGHT0); |
| glDisable(GL_TEXTURE_2D); |
| glCallList(cage); |
| |
| glPushMatrix(); |
| glTranslatef(0.0, 0.0, zTranslate); |
| glRotatef(xRotation, 1, 0, 0); |
| glRotatef(yRotation, 0, 1, 0); |
| |
| if (isLit == TRUE) { |
| glEnable(GL_LIGHTING); |
| glEnable(GL_LIGHT0); |
| } |
| |
| glEnable(GL_TEXTURE_2D); |
| if (isFogged) { |
| glDisable(GL_FOG); |
| } |
| glPolygonMode(GL_FRONT, GL_FILL); |
| glColor3fv(RGBMap[deepestColor]); |
| glCallList(genericObject); |
| |
| glPopMatrix(); |
| glFlush(); |
| |
| if (autoRotate) { |
| xRotation += .75; |
| yRotation += .375; |
| } |
| glutSwapBuffers(); |
| } |
| |
| void Reshape(int width, int height) |
| { |
| |
| W = width; |
| H = height; |
| ReInit(); |
| glViewport( 0, 0, width, height ); /*new*/ |
| } |
| |
| void Key2(int key, int x, int y) |
| { |
| |
| switch (key) { |
| case GLUT_KEY_LEFT: |
| yRotation -= 0.5; |
| autoRotate = FALSE; |
| ReInit(); |
| break; |
| case GLUT_KEY_RIGHT: |
| yRotation += 0.5; |
| autoRotate = FALSE; |
| ReInit(); |
| break; |
| case GLUT_KEY_UP: |
| xRotation -= 0.5; |
| autoRotate = FALSE; |
| ReInit(); |
| break; |
| case GLUT_KEY_DOWN: |
| xRotation += 0.5; |
| autoRotate = FALSE; |
| ReInit(); |
| break; |
| default: |
| return; |
| } |
| } |
| |
| void Key(unsigned char key, int x, int y) |
| { |
| |
| switch (key) { |
| case 27: |
| free(image->data); |
| exit(1); |
| |
| case 'a': |
| autoRotate = !autoRotate; |
| ReInit(); |
| break; |
| case 'c': |
| genericObject = (genericObject == cube) ? cylinder : 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': |
| genericObject = torus; |
| 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; |
| } |
| } |
| |
| GLenum Args(int argc, char **argv) |
| { |
| GLint i; |
| |
| doubleBuffer = GL_FALSE; |
| numComponents = 4; |
| |
| 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 if (strcmp(argv[i], "-4") == 0) { |
| numComponents = 4; |
| } else if (strcmp(argv[i], "-3") == 0) { |
| numComponents = 3; |
| } else { |
| printf("%s (Bad option).\n", argv[i]); |
| return GL_FALSE; |
| } |
| } |
| return GL_TRUE; |
| } |
| |
| void GLUTCALLBACK glut_post_redisplay_p(void) |
| { |
| glutPostRedisplay(); |
| } |
| |
| 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(glut_post_redisplay_p); |
| |
| glutMainLoop(); |
| return 0; |
| } |