probleme avec l'affichage de texture

**simo113** · 25/03/2011, 12h03

bonjour tous le monde.
j'ai un petit souci avec le placage d'une texture sur un cube simple.
voila le code:

Code :

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testGL1::testGL1(QWidget *parent) :  
    QGLWidget(parent)
{
     clearColor = Qt::darkYellow;
    xRot = 0;
    yRot = 0;
    zRot = 0;
}
 
void testGL1::loadTexture()
{
   texture[0] = bindTexture(QPixmap(QString(":/image.png")),  GL_TEXTURE_2D);
   glBindTexture( GL_TEXTURE_2D, texture[0] );
}
 
void testGL1::initializeGL()
{
    loadTexture();
 
    glShadeModel(GL_SMOOTH);
    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    glClearDepth(1.0f);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LEQUAL);
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 
 
}
 
void testGL1::resizeGL(int width,int height)
{
    if (height==0)			// Prevent A Divide By Zero By
        {
                height=1;		// Making Height Equal One
        }
 
        glViewport(0,0,width,height);	// Reset The Current Viewport
 
        glMatrixMode(GL_PROJECTION);	// Select The Projection Matrix
        glLoadIdentity();		// Reset The Projection Matrix
 
        // Calculate The Aspect Ratio Of The Window
        gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
 
        glMatrixMode(GL_MODELVIEW);				// Select The Modelview Matrix
        glLoadIdentity();
}
 
void testGL1::paintGL()
{
        qglClearColor(clearColor);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	
         glLoadIdentity();
 
         glEnable(GL_DEPTH_TEST);
         glTranslatef(0.0f,0.0f,-20.0F) ;
         glRotatef(-50.0F,1.0F,0.0F,0.0F);
 
         glRotatef(xRot/ 16.0f , 1.0f, 0.0f, 0.0f);
         glRotatef(yRot/ 16.0f , 0.0f, 1.0f, 0.0f);
         glRotatef(zRot/ 16.0f, 0.0f, 0.0f, 1.0f);
 
         for ( int i = 0 ; i < 6 ; i++ ) {
             glPushMatrix();
             glRotatef(i*360.0F/6,0.0F,0.0F,1.0F);
             glTranslatef(6.0f,0.0f,0.0F) ;
             SolidCube(1.0F) ;//
             glPopMatrix(); }
 
          glDisable(GL_DEPTH_TEST);
          glFlush();
}
 
 
void testGL1::SolidCube(float c){
 
  glBindTexture(GL_TEXTURE_2D, texture[0]);
 
    c /= 1.0F;
  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);
  //glNormal3f(0.0F,0.0F,1.0F);
  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);
  glTexCoord2f(0.0f, 0.0f); glVertex3f(c,-c,c);
  //glNormal3f(-1.0F,0.0F,0.0F);
  glTexCoord2f(0.0f, 1.0f); glVertex3f(-c,c,-c);
  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);
  //glNormal3f(1.0F,0.0F,0.0F);
  glTexCoord2f(1.0f, 1.0f); glVertex3f(c,c,c);
  glTexCoord2f(0.0f, 1.0f); glVertex3f(c,-c,c);
  glTexCoord2f(0.0f, 0.0f); glVertex3f(c,-c,-c);
  glTexCoord2f(1.0f, 0.0f); glVertex3f(c,c,-c);
  //glNormal3f(0.0F,-1.0F,0.0F);
 
  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);
  glTexCoord2f(0.0f, 0.0f); glVertex3f(c,-c,c);
  //glNormal3f(0.0F,1.0F,0.0F);
  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();
 
}

ca compile sans probleme , mais la texture ne s'affiche pas, je vois plutot mes cubes en blanc.
Merci d'avance

Invité · 25/03/2011, 12h27

Code :

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glEnable(GL_TEXTURE_2D);

**simo113** · 25/03/2011, 13h32

merci de ta réponse.
en fait, je l'ai mis a plusieurs endroits mais toujours rien, que du blanc.
ou est ce ke je doit la mettre exactement

**dragonjoker59** · 25/03/2011, 14h03

normalement tu devrais pouvoir le mettre à l'initialisation d'OpenGL

**simo113** · 25/03/2011, 14h05

j'ai deja éssayé, mais rien na changé.
je veux éssayé maintenant avec un seul cube simplement, que je met directement dans paintGL(), voila le code.

Code :

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testGL1::testGL1(QWidget *parent) :  //fenetrePrincipale *parent  int timerInterval,
    QGLWidget(parent)
{
    clearColor = Qt::darkYellow;
    glInit() ;
}
 
testGL1::~testGL1()
{
}
 
void testGL1::initializeGL()
{
 
 
    glEnable(GL_TEXTURE_2D);
    loadTexture();
 
    glShadeModel(GL_SMOOTH);
    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    glClearDepth(1.0f);
 
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LEQUAL);
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 
}
 
void testGL1::resizeGL(int width,int height)
{
    if (height==0)			// Prevent A Divide By Zero By
        {
                height=1;		// Making Height Equal One
        }
 
        glViewport(0,0,width,height);	// Reset The Current Viewport
 
        glMatrixMode(GL_PROJECTION);	// Select The Projection Matrix
        glLoadIdentity();		// Reset The Projection Matrix
 
        // Calculate The Aspect Ratio Of The Window
        gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
 
        glMatrixMode(GL_MODELVIEW);				// Select The Modelview Matrix
        glLoadIdentity();
}
 
void testGL1::paintGL()
{
        qglClearColor(clearColor);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear Screen And Depth Buffer
 
        glLoadIdentity();
        glEnable(GL_TEXTURE_2D);
        glEnable(GL_DEPTH_TEST);
 
         glTranslatef(0.0f,0.0f,-20.0F) ;
 
 
        float  c = 1.0F;
       glPushMatrix();
      glGenTextures( 1, &texture );
      glBindTexture(GL_TEXTURE_2D, texture);
        glBegin(GL_QUADS);
        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);
 
        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);
        glTexCoord2f(0.0f, 0.0f); glVertex3f(c,-c,c);
 
        glTexCoord2f(0.0f, 1.0f); glVertex3f(-c,c,-c);
        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(1.0f, 1.0f); glVertex3f(c,c,c);
        glTexCoord2f(0.0f, 1.0f); glVertex3f(c,-c,c);
        glTexCoord2f(0.0f, 0.0f); glVertex3f(c,-c,-c);
        glTexCoord2f(1.0f, 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);
        glTexCoord2f(0.0f, 0.0f); glVertex3f(c,-c,c);
 
        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();
       glPopMatrix();
 
          glFlush();
}
 
 
 
 
void testGL1::loadTexture()
{
 
  texture = bindTexture(QPixmap(QString(":/images/side1.png")),  GL_TEXTURE_2D);
 
  glGenTextures( 1, &texture );
   glBindTexture( GL_TEXTURE_2D, texture );
 
   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
  deleteTexture(texture);
}

Invité · 25/03/2011, 16h11

float c = 1.0F;
glPushMatrix();
glGenTextures( 1, &texture );
glBindTexture(GL_TEXTURE_2D, texture);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(c,c,-c);
glTexCoord2f(1.0f, 0.0f); glVertex3f(c,-c,-c);

Le glGenTextures( 1, &texture ) ici va te mettre une texture pas initialisée dans texture, que tu utilises à la place de celle que tu as chargé. Essaye plutôt de réutiliser l'id dans lequel tu as chargé quelque chose.

probleme avec l'affichage de texture

OpenGL

Vue hybride

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