Textures tga/affichage

**seeme** · 20/02/2006, 12h15

Bonjour

Je voudrais utiliser le loader de http://www.levp.de/3d/ pour charger une image tga, et ensuite l'utiliser comme texture dans opengl.

Je suis arrivé à cela:

Code :

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#include <ltga.h>
#include "ltga.cpp"
 
LTGA tga;
static GLuint pixel;             
 
 
void init(void)
{
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_SMOOTH);
 
    glGenTextures(1, &pixel);
    glBindTexture(GL_TEXTURE_2D, pixel);
    tga.LoadFromFile("mouton2.tga");
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tga.GetImageWidth(), tga.GetImageHeight(), 0, GL_RGB, GL_UNSIGNED_BYTE, tga.GetPixels());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 
 
 
 
    glEnable(GL_DEPTH_TEST);
}
 
void display(void)
{
 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glEnable(GL_TEXTURE_2D);
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);    
    glBindTexture(GL_TEXTURE_2D, pixel);
    glEnable(GL_TEXTURE_2D);
        glBegin(GL_QUADS);
                          glTexCoord2f(0.0, 0.0);glVertex3f(-1.0, -1.0, 0.0);
                          glTexCoord2f(0.0, 1.0);glVertex3f(1.0, -1.0, 0.0);
                          glTexCoord2f(1.0, 1.0);glVertex3f(1.0, 1.0, 0.0);
                          glTexCoord2f(1.0, 0.0);glVertex3f(-1.0, 1.0, 0.0);
        glEnd();
 
    glutSwapBuffers();
}
 
 
void reshape(int w, int h)
{
     glViewport(0, 0, (GLsizei)w, (GLsizei)h);
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     gluPerspective(60.0, (GLfloat)w/(GLfloat)h, 0.1, 20.0);;
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
 
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
 
}

Mais mon carré reste désespérement blanc :'(

Quelqun pourrait m'éclairer?
MErci d'avance

**fearyourself** · 20/02/2006, 12h28

Sans la possibilité de tester ton code,
Ceci me semble étrange c'est tes coordonnées de texture par rapport à la position des vertex...

Code :

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        glBegin(GL_QUADS);
                          glTexCoord2f(0.0, 0.0);glVertex3f(-1.0, -1.0, 0.0);
                          glTexCoord2f(0.0, 1.0);glVertex3f(1.0, -1.0, 0.0);
                          glTexCoord2f(1.0, 1.0);glVertex3f(1.0, 1.0, 0.0);
                          glTexCoord2f(1.0, 0.0);glVertex3f(-1.0, 1.0, 0.0);
        glEnd();

Je mettrais plutôt:

Code :

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        glBegin(GL_QUADS);
                          glTexCoord2f(0.0, 0.0);glVertex3f(-1.0, -1.0, 0.0);
                          glTexCoord2f(1.0, 0.0);glVertex3f(1.0, -1.0, 0.0);
                          glTexCoord2f(1.0, 1.0);glVertex3f(1.0, 1.0, 0.0);
                          glTexCoord2f(0.0, 1.0);glVertex3f(-1.0, 1.0, 0.0);
        glEnd();

Mais sans pouvoir tester, je peux me tromper...
Jc

**seeme** · 20/02/2006, 12h30

J'ai testé avec les coordonnées que tu m'as fournis, mais rien de change, merci quand même.
:'(

Je n'ai pas de problème à la compilation, c'est vraiment bizzar... :'( :'(

Voilà le code complet, mais c'ets vraiment le bordel (c'est un debut de jeux d'echec, je sais c'est pas très original)

Code :

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/**************************
 * Includes
 *
 **************************/
 
#include <stdlib.h>
#include <gl/glut.h>
#include <math.h>
#include <ltga.h>
#include "ltga.cpp"
 
 
 
#define checkImageWidth 64
#define checkImageHeight 64
 
 
LTGA tga;
void chekerDraw(void);
void drawPion (float x, float z);
static GLubyte checkImage[checkImageHeight][checkImageWidth][4];
static GLuint texCheck, pixel;
float rotateCamy=0.0, rotateCamx=0, xCam=0.0, yCam=1.0, zCam=3.0, posCam=0.0, xPiece=0.0, yPiece=0.0, zPiece=0.0;
int x;
void keyboard(unsigned char key, int x, int y);
 
 
 
 
 
 
 
void makeCheckImage(void)
{
     int i, j, c;
     for (i=0; i<checkImageHeight; i++)
     {
         for(j=0; j<checkImageWidth; j++)
         {
                  c= ((((i&0x8)==0)^((j&0x8))==0))*255;
                  checkImage[i][j][0] = (GLubyte) c;
                  checkImage[i][j][1] = (GLubyte) c;
                  checkImage[i][j][2] = (GLubyte) c;
                  checkImage[i][j][3] = (GLubyte) 255;
         }
     }
}                  
 
 
void myTimer(int value);
 
void init(void)
{
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_SMOOTH);
    /*makeCheckImage();
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    
    glGenTextures(1, &texCheck);
    glBindTexture(GL_TEXTURE_2D, texCheck);
    
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, checkImageWidth, checkImageHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, checkImage);
    */
 
 
    //unsigned char* pixels = tga.GetPixels();
 
    glGenTextures(1, &pixel);
    glBindTexture(GL_TEXTURE_2D, pixel);
    tga.LoadFromFile("mouton2.tga");
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tga.GetImageWidth(), tga.GetImageHeight(), 0, GL_RGB, GL_UNSIGNED_BYTE, tga.GetPixels());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 
 
 
 
    glEnable(GL_DEPTH_TEST);
}
 
void display(void)
{
 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    //glBindTexture(GL_TEXTURE_2D, texCheck);
 
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
     //gluLookAt(zCam*cos(posCam), yCam, zCam*sin(posCam), 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
     gluLookAt(0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
 
     glMatrixMode(GL_PROJECTION);
     glPushMatrix();
     glTranslatef(0.0, 0.0, 0.0);
 
 
    glBindTexture(GL_TEXTURE_2D, pixel);
    glEnable(GL_TEXTURE_2D);
        glBegin(GL_QUADS);
                          glTexCoord2f(0.0, 0.0);glVertex3f(-1.0, -1.0, 0.0);
                          glTexCoord2f(1.0, 0.0);glVertex3f(1.0, -1.0, 0.0);
                          glTexCoord2f(1.0, 1.0);glVertex3f(1.0, 1.0, 0.0);
                          glTexCoord2f(0.0, 1.0);glVertex3f(-1.0, 1.0, 0.0);
        glEnd();
 
    //chekerDraw();
 
 
    glutSwapBuffers();
}
 
 
void reshape(int w, int h)
{
     glViewport(0, 0, (GLsizei)w, (GLsizei)h);
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     gluPerspective(60.0, (GLfloat)w/(GLfloat)h, 0.1, 20.0);;
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
 
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
 
}  
 
 
int main (int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);
    glutInitWindowSize(800, 600);
    glutInitWindowPosition(100, 100);
    glutCreateWindow("See(me) my View");
    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutKeyboardFunc(keyboard);
    glutTimerFunc(1000/60,myTimer,x);
    glutMainLoop();
    return 0;
}
 
 
 
void myTimer(int value)
{
   glutPostRedisplay();
   glutTimerFunc(1000/60, myTimer, 1);
 
}
 
void keyboard(unsigned char key, int x, int y)
{
     switch(key)
     {
                case 'q':
                     posCam+=0.1;
                     glutPostRedisplay();
                     break;
 
                case 'd':
                     posCam-=0.1;
                     glutPostRedisplay();
                     break;
 
                case 'z':
                     yCam+=0.1;
                     if(yCam>2.5)yCam-=0.1;
                     glutPostRedisplay();
                     break;
 
                case 's':
                     yCam-=0.1;
                     if (yCam<0.2)yCam+=0.1;
                     glutPostRedisplay();
                     break;
 
                case 'a':
                     if(zCam>=0.0)zCam-=0.1;
                     glutPostRedisplay();
                     break;
 
                case 'e':
                     if(zCam!=3.0)zCam+=0.1;
                     glutPostRedisplay();
                     break;
 
                default:
                     break;
     }
}
 
 
void chekerDraw(void)
{
 
 
    glBegin(GL_QUADS);
                          glTexCoord2f(0.0, 0.0);glVertex3f(-1.0, 0.0, -1.0);
                          glTexCoord2f(0.0, 1.0);glVertex3f(1.0, 0.0, -1.0);
                          glTexCoord2f(1.0, 1.0);glVertex3f(1.0, 0.0, 1.0);
                          glTexCoord2f(1.0, 0.0);glVertex3f(-1.0, 0.0, 1.0);
        glEnd();
 
        glDisable(GL_TEXTURE_2D);
        glColor3ub(195, 110, 30);
        glBegin(GL_QUADS);//fond
                          glVertex3f(-1.2, -0.2, -1.2);
                          glVertex3f(1.2, -0.2, -1.2);
                          glVertex3f(1.2, -0.2, 1.2);
                          glVertex3f(-1.2, -0.2, 1.2);
        glEnd();
        glBegin(GL_QUADS);
                          glVertex3f(-1.2, -0.2, -1.2);
                          glVertex3f(-1.2, 0.0, -1.2);
                          glVertex3f(-1.2, 0.0, 1.2);
                          glVertex3f(-1.2, -0.2, 1.2);
        glEnd(); 
        glBegin(GL_QUADS);
                          glVertex3f(1.2, -0.2, -1.2);
                          glVertex3f(1.2, 0.0, -1.2);
                          glVertex3f(1.2, 0.0, 1.2);
                          glVertex3f(1.2, -0.2, 1.2);
        glEnd();   
        glBegin(GL_QUADS);
                          glVertex3f(1.2, -0.2, 1.2);
                          glVertex3f(1.2, 0.0, 1.2);
                          glVertex3f(-1.2, 0.0, 1.2);
                          glVertex3f(-1.2, -0.2, 1.2);
        glEnd();
        glBegin(GL_QUADS);
                          glVertex3f(1.2, -0.2, -1.2);
                          glVertex3f(1.2, 0.0, -1.2);
                          glVertex3f(-1.2, 0.0, -1.2);
                          glVertex3f(-1.2, -0.2, -1.2);
        glEnd();
        glBegin(GL_QUADS);
                          glVertex3f(-1.2, 0.0, -1.2);
                          glVertex3f(-1.0, 0.0, -1.2);
                          glVertex3f(-1.0, 0.0, 1.2);
                          glVertex3f(-1.2, 0.0, 1.2);
        glEnd();
        glBegin(GL_QUADS);
                          glVertex3f(1.0, 0.0, -1.2);
                          glVertex3f(1.2, 0.0, -1.2);
                          glVertex3f(1.2, 0.0, 1.2);
                          glVertex3f(1.0, 0.0, 1.2);
        glEnd();
        glBegin(GL_QUADS);
                          glVertex3f(-1.0, 0.0, -1.2);
                          glVertex3f(1.0, 0.0, -1.2);
                          glVertex3f(1.0, 0.0, -1.0);
                          glVertex3f(-1.0, 0.0, -1.0);
        glEnd();
        glBegin(GL_QUADS);
                          glVertex3f(-1.0, 0.0, 1.0);
                          glVertex3f(1.0, 0.0, 1.0);
                          glVertex3f(1.0, 0.0, 1.2);
                          glVertex3f(-1.0, 0.0, 1.2);
        glEnd();
        glPopMatrix();
 
}

Textures tga/affichage

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