/* * 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 <math.h> #include <stdlib.h> #include <GL/glut.h> #include "loadppm.c" GLenum doubleBuffer; char *texFileName = 0; PPMImage *image; float *minFilter, *magFilter, *sWrapMode, *tWrapMode; float decal[] = {GL_DECAL}; float modulate[] = {GL_MODULATE}; float repeat[] = {GL_REPEAT}; float clamp[] = {GL_CLAMP}; float nr[] = {GL_NEAREST}; float ln[] = {GL_LINEAR}; float nr_mipmap_nr[] = {GL_NEAREST_MIPMAP_NEAREST}; float nr_mipmap_ln[] = {GL_NEAREST_MIPMAP_LINEAR}; float ln_mipmap_nr[] = {GL_LINEAR_MIPMAP_NEAREST}; float ln_mipmap_ln[] = {GL_LINEAR_MIPMAP_LINEAR}; GLint sphereMap[] = {GL_SPHERE_MAP}; GLenum doSphere = GL_FALSE; float xRotation = 0.0, yRotation = 0.0, zTranslate = -3.125; GLint cube; float c[6][4][3] = { { { 1.0, 1.0, -1.0 }, { -1.0, 1.0, -1.0 }, { -1.0, -1.0, -1.0 }, { 1.0, -1.0, -1.0 } }, { { 1.0, 1.0, 1.0 }, { 1.0, 1.0, -1.0 }, { 1.0, -1.0, -1.0 }, { 1.0, -1.0, 1.0 } }, { { -1.0, 1.0, 1.0 }, { 1.0, 1.0, 1.0 }, { 1.0, -1.0, 1.0 }, { -1.0, -1.0, 1.0 } }, { { -1.0, 1.0, -1.0 }, { -1.0, 1.0, 1.0 }, { -1.0, -1.0, 1.0 }, { -1.0, -1.0, -1.0 } }, { { -1.0, 1.0, 1.0 }, { -1.0, 1.0, -1.0 }, { 1.0, 1.0, -1.0 }, { 1.0, 1.0, 1.0 } }, { { -1.0, -1.0, -1.0 }, { -1.0, -1.0, 1.0 }, { 1.0, -1.0, 1.0 }, { 1.0, -1.0, -1.0 } } }; static 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 } }; static float t[6][4][2] = { { { 1.1, 1.1 }, { -0.1, 1.1 }, { -0.1, -0.1 }, { 1.1, -0.1 } }, { { 1.1, 1.1 }, { -0.1, 1.1 }, { -0.1, -0.1 }, { 1.1, -0.1 } }, { { -0.1, 1.1 }, { 1.1, 1.1 }, { 1.1, -0.1 }, { -0.1, -0.1 } }, { { 1.1, 1.1 }, { -0.1, 1.1 }, { -0.1, -0.1 }, { 1.1, -0.1 } }, { { 1.1, 1.1 }, { -0.1, 1.1 }, { -0.1, -0.1 }, { 1.1, -0.1 } }, { { 1.1, 1.1 }, { -0.1, 1.1 }, { -0.1, -0.1 }, { 1.1, -0.1 } }, }; static void BuildCube(void) { GLint i; glNewList(cube, GL_COMPILE); for (i = 0; i < 6; i++) { glBegin(GL_POLYGON); glNormal3fv(n[i]); glTexCoord2fv(t[i][0]); glVertex3fv(c[i][0]); glNormal3fv(n[i]); glTexCoord2fv(t[i][1]); glVertex3fv(c[i][1]); glNormal3fv(n[i]); glTexCoord2fv(t[i][2]); glVertex3fv(c[i][2]); glNormal3fv(n[i]); glTexCoord2fv(t[i][3]); glVertex3fv(c[i][3]); glEnd(); } glEndList(); } static void BuildLists(void) { cube = glGenLists(1); BuildCube(); } static void Init(void) { glPixelStorei(GL_UNPACK_ALIGNMENT, 1); gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE, image->data); glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal); glEnable(GL_TEXTURE_2D); glFrontFace(GL_CCW); glCullFace(GL_FRONT); glEnable(GL_CULL_FACE); BuildLists(); glClearColor(0.0, 0.0, 0.0, 0.0); magFilter = nr; minFilter = nr; sWrapMode = repeat; tWrapMode = repeat; } static void Reshape(int width, int height) { glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(145.0, 1.0, 0.01, 1000); glMatrixMode(GL_MODELVIEW); } static void Key2(int key, int x, int y) { switch (key) { case GLUT_KEY_LEFT: yRotation -= 0.5; break; case GLUT_KEY_RIGHT: yRotation += 0.5; break; case GLUT_KEY_UP: xRotation -= 0.5; break; case GLUT_KEY_DOWN: xRotation += 0.5; break; default: return; } glutPostRedisplay(); } static void Key(unsigned char key, int x, int y) { switch (key) { case 27: exit(1); case 'T': zTranslate += 0.25; break; case 't': zTranslate -= 0.25; break; case 's': doSphere = !doSphere; if (doSphere) { 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); } else { glDisable(GL_TEXTURE_GEN_S); glDisable(GL_TEXTURE_GEN_T); } break; case '0': magFilter = nr; break; case '1': magFilter = ln; break; case '2': minFilter = nr; break; case '3': minFilter = ln; break; case '4': minFilter = nr_mipmap_nr; break; case '5': minFilter = nr_mipmap_ln; break; case '6': minFilter = ln_mipmap_nr; break; case '7': minFilter = ln_mipmap_ln; break; default: return; } glutPostRedisplay(); } static void Draw(void) { glClear(GL_COLOR_BUFFER_BIT); glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, sWrapMode); glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tWrapMode); glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter); glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter); glPushMatrix(); glTranslatef(0.0, 0.0, zTranslate); glRotatef(xRotation, 1, 0, 0); glRotatef(yRotation, 0, 1, 0); glCallList(cube); 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 if (strcmp(argv[i], "-f") == 0) { if (i+1 >= argc || argv[i+1][0] == '-') { printf("-f (No file name).\n"); return GL_FALSE; } else { texFileName = 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 (texFileName == 0) { printf("No image file.\n"); exit(1); } image = LoadPPM(texFileName); glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300); type = GLUT_RGB; 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); glutMainLoop(); return 0; }