L'exécutable

• Escape pour quitter l'application
• Enter pour switcher entre affichage fil de fer et affichage plein
• Left, Right, Down, Up, Page up et Page down pour déplacer la caméra en -x, +x, -y, +y, -z et +z
• F1 pour replacer la caméra en position (0.0,0.0,10.0)
• 'a' pour activer/désactiver l'animation
• Espace pour activer/désactiver le plaçage de texture

Fichier source : PlacageMultiTextures.cppp

#include "PNG/ChargePngFile.h"

/* Fonction de chargement d'une texture         */
/* a partir d'un fichier image au format png    */
/* filename : le nom du fichier                 */
/* @retour : le handle de la texture            */

unsigned int chargementTexturePNG(char *filename) {
  unsigned int textureID = 0;
  glGenTextures(1,&textureID);
  int rx;
  int ry;
  unsigned char *img = chargeImagePng(filename,&rx,&ry);
  if ( img && textureID ) {
    glBindTexture(GL_TEXTURE_2D,textureID);
    glPixelStorei(GL_UNPACK_ALIGNMENT,1);
    glTexImage2D(GL_TEXTURE_2D,0,3,rx,ry,0,GL_RGB,GL_UNSIGNED_BYTE,img); 
    glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT); 
    glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
    glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST); 
    glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
    free(img); }
    else {
    if ( img ) {
      free(img); }
    if ( textureID ) {
      glDeleteTextures(1,&textureID);
      textureID = 0; } }
  return textureID;
}

/* Modelisation geometrique d'un cube           */
/* avec placage de textures sur chacune         */
/* de ses faces                                 */
/* ct : la taille du cube                       */
/* filenames : le tableau des noms              */
/*             des 6 fichiers png a utiliser    */
/*             pour le placage de texture       */

static void mySolidCube(double ct,char **filenames) {
  float c =(float) ct/2.0F;
  unsigned int textureID;
  /* Chargement premiere texture                */
  textureID = chargementTexturePNG(filenames[0]);
  glBegin(GL_QUADS);
  glNormal3f(0.0F,0.0F,-1.0F);
  glTexCoord2f(0.0F,0.0F);
  glVertex3f( c, c,-c);
  glTexCoord2f(0.0F,1.0F);
  glVertex3f( c,-c,-c);
  glTexCoord2f(1.0F,1.0F);
  glVertex3f(-c,-c,-c);
  glTexCoord2f(1.0F,0.0F);
  glVertex3f(-c, c,-c);
  glEnd();
  /* Dechargement premiere texture              */
  glDeleteTextures(1,&textureID);
  /* Chargement deuxieme texture                */
  textureID = chargementTexturePNG(filenames[1]);
  glBegin(GL_QUADS);
  glNormal3f(0.0F,0.0F,1.0F);
  glTexCoord2f(0.0F,0.0F);
  glVertex3f(-c,-c, c);
  glTexCoord2f(1.0F,0.0F);
  glVertex3f( c,-c, c);
  glTexCoord2f(1.0F,1.0F);
  glVertex3f( c, c, c);
  glTexCoord2f(0.0F,1.0F);
  glVertex3f(-c, c, c);
  glEnd();
  /* Dechargement deuxieme texture              */
  glDeleteTextures(1,&textureID);
  /* Chargement troisieme texture               */
  textureID = chargementTexturePNG(filenames[2]);
  glBegin(GL_QUADS);
  glNormal3f(-1.0F,0.0F,0.0F);
  glTexCoord2f(0.0F,0.0F);
  glVertex3f(-c, c,-c);
  glTexCoord2f(0.0F,1.0F);
  glVertex3f(-c,-c,-c);
  glTexCoord2f(1.0F,1.0F);
  glVertex3f(-c,-c, c);
  glTexCoord2f(1.0F,0.0F);
  glVertex3f(-c, c, c);
  glEnd();
  /* Dechargement troisieme texture             */
  glDeleteTextures(1,&textureID);
  /* Chargement quatrieme texture               */
  textureID = chargementTexturePNG(filenames[3]);
  glBegin(GL_QUADS);
  glNormal3f(1.0F,0.0F,0.0F);
  glTexCoord2f(0.0F,0.0F);
  glVertex3f( c, c, c);
  glTexCoord2f(0.0F,1.0F);
  glVertex3f( c,-c, c);
  glTexCoord2f(1.0F,1.0F);
  glVertex3f( c,-c,-c);
  glTexCoord2f(1.0F,0.0F);
  glVertex3f( c, c,-c);
  glEnd();
  /* Dechargement quatrieme texture             */
  glDeleteTextures(1,&textureID);
  /* Chargement cinquieme texture               */
  textureID = chargementTexturePNG(filenames[4]);
  glBegin(GL_QUADS);
  glNormal3f(0.0F,-1.0F,0.0F);
  glTexCoord2f(0.0F,0.0F);
  glVertex3f(-c,-c, c);
  glTexCoord2f(0.0F,1.0F);
  glVertex3f(-c,-c,-c);
  glTexCoord2f(1.0F,1.0F);
  glVertex3f( c,-c,-c);
  glTexCoord2f(1.0F,0.0F);
  glVertex3f( c,-c, c);
  glEnd();
  /* Dechargement cinquieme texture             */
  glDeleteTextures(1,&textureID);
  /* Chargement sixieme texture                 */
  textureID = chargementTexturePNG(filenames[5]);
  glBegin(GL_QUADS);
  glNormal3f(0.0F,1.0F,0.0F);
  glTexCoord2f(0.0F,0.0F);
  glVertex3f( c, c, c);
  glTexCoord2f(0.0F,1.0F);
  glVertex3f( c, c,-c);
  glTexCoord2f(1.0F,1.0F);
  glVertex3f(-c, c,-c);
  glTexCoord2f(1.0F,0.0F);
  glVertex3f(-c, c, c);
  glEnd();
  /* Dechargement sixieme texture               */
  glDeleteTextures(1,&textureID);
}

/* Scene dessinee                               */

static void scene(void) {
  glPushMatrix();
  char *filenames[6] = { "Emoji1.png","Emoji2.png","Emoji3.png",
                         "Emoji4.png","Emoji5.png","Emoji6.png" };
  mySolidCube(5.0,filenames);
  glPopMatrix();
}

RETOUR