Faire défiler un objet openGl

#include <SDL/SDL.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <cstdlib>
#include <windows.h>

SHORT Mask = 32768;
double TRose = 8, TBleu = 8, TJaune = 8, TRouge = 8, TVert = 8;
int x =0;
//void Draw();
void Repere();
void Manche();
void defiler();
void Quadz ( double posAX,double posAY,double posAZ,double Largeur,double Longeur,double Hauteur, bool ColorR, bool ColorG, bool ColorB); //couleur = 0||1



int main(int argc, char *argv[])
{
    SDL_Event event;

    SDL_Init(SDL_INIT_VIDEO);
    atexit(SDL_Quit);
    SDL_WM_SetCaption("SDL GL Application", NULL);
    SDL_SetVideoMode(800, 600, 32, SDL_OPENGL);

    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    gluPerspective(70,(double)800/600,1,1000);
    	glEnable(GL_DEPTH_TEST);



    //Draw();

    for (;;)
    {


    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity( );

    gluLookAt(0.5,2,-1.2, 0.5,0.2,2.5, 0, 0, 1);
        SDL_PollEvent(&event);



        if (GetKeyState('G') & Mask)// incrémentation en Z de la case verte 
                TVert = TVert -0.01;
        if (GetKeyState('T') & Mask)
                TVert = TVert +0.01;



         Repere();
         Manche();
         defiler();
         Quadz (0, 0.2, TVert, 0.2, 0.0625, 0.0500, 0, 1, 0);// déplacement manuel de la case verte 

      // Draw();

           glFlush();
    SDL_GL_SwapBuffers();
    }

    return 0;
}




void Quadz ( double posAX,double posAY,double posAZ,double Largeur,double Longeur,double Hauteur, bool ColorR, bool ColorG, bool ColorB) //couleur = 0||1
{
    GLubyte RDESSUS=0, RDEVANT=0, RGAUCHE=0, RDROITE=0, RDESSOUS=0, RDERRIERE=0, GDESSUS=0, GDEVANT=0, GGAUCHE=0, GDROITE=0, GDESSOUS=0, GDERRIERE=0, BDESSUS=0, BDEVANT=0, BGAUCHE=0, BDROITE=0, BDESSOUS=0, BDERRIERE=0;


    if (ColorR==1)
    {
        RDESSUS= 255;
        RDEVANT= 190;
        RGAUCHE= 130;
        RDROITE= 130;
        RDESSOUS= 80;
        RDERRIERE= 80;
    }

    if (ColorG==1)
    {
        GDESSUS= 255;
        GDEVANT= 190;
        GGAUCHE= 130;
        GDROITE= 130;
        GDESSOUS= 80;
        GDERRIERE= 80;
    }

    if (ColorB==1)
    {
        BDESSUS= 255;
        BDEVANT= 190;
        BGAUCHE= 130;
        BDROITE= 130;
        BDESSOUS= 80;
        BDERRIERE= 80;
    }







    glBegin(GL_QUADS);

    glColor3ub(RDEVANT,GDEVANT,BDEVANT); //face DEVANT
     glVertex3d(posAX,posAY,posAZ);   //A
     glVertex3d(posAX+Largeur,posAY,posAZ);   //B
     glVertex3d(posAX+Largeur,posAY+Hauteur,posAZ); //C
     glVertex3d(posAX,posAY+Hauteur,posAZ); //D

    glColor3ub(RDROITE,GDROITE,BDROITE); //face DROITE
     glVertex3d(posAX+Largeur,posAY,posAZ);   //B
     glVertex3d(posAX+Largeur,posAY,posAZ+Longeur);   //F
     glVertex3d(posAX+Largeur,posAY+Hauteur,posAZ+Longeur);  //G
     glVertex3d(posAX+Largeur,posAY+Hauteur,posAZ); //C

    glColor3ub(RDESSOUS,GDESSOUS,BDESSOUS); //face DESSOUS
     glVertex3d(posAX,posAY,posAZ);   //A
     glVertex3d(posAX+Largeur,posAY,posAZ);   //B
     glVertex3d(posAX+Largeur,posAY,posAZ+Longeur);   //F
     glVertex3d(posAX,posAY,posAZ+Longeur);    //E

    glColor3ub(RGAUCHE,GGAUCHE,BGAUCHE); //face GAUCHE
     glVertex3d(posAX,posAY,posAZ);   //A
     glVertex3d(posAX,posAY,posAZ+Longeur);    //E
     glVertex3d(posAX,posAY+Hauteur,posAZ+Longeur);   //H
     glVertex3d(posAX,posAY+Hauteur,posAZ); //D

    glColor3ub(RDERRIERE,GDERRIERE,BDERRIERE); //face DERRIERE
     glVertex3d(posAX,posAY,posAZ+Longeur);    //E
     glVertex3d(posAX+Largeur,posAY,posAZ+Longeur);   //F
     glVertex3d(posAX+Largeur,posAY+Hauteur,posAZ+Longeur);  //G
     glVertex3d(posAX,posAY+Hauteur,posAZ+Longeur);   //H

    glColor3ub(RDESSUS, GDESSUS, BDESSUS); //face DESSUS
     glVertex3d(posAX,posAY+Hauteur,posAZ); //D
     glVertex3d(posAX+Largeur,posAY+Hauteur,posAZ); //C
     glVertex3d(posAX+Largeur,posAY+Hauteur,posAZ+Longeur);  //G
     glVertex3d(posAX,posAY+Hauteur,posAZ+Longeur);   //H
      glEnd();

}



void Repere()
{
    glBegin(GL_LINES);

         glColor3ub(0,255,0);
            glVertex3d(0,0,0); //X
            glVertex3d(1,0,0);
             glEnd();

    glBegin(GL_LINES);
         glColor3ub(0,0,255);
            glVertex3d(0,0,0); //Y
            glVertex3d(0,1,0);
             glEnd();

    glBegin(GL_LINES);
        glColor3ub(255,0,0);
            glVertex3d(0,0,0); //Z
            glVertex3d(0,0,1);
             glEnd();
}



void Manche()
{
     glBegin(GL_QUADS);

    glColor3ub(125,60,0); //face DEVANT
     glVertex3d(0,0,0);   //A
     glVertex3d(1,0,0);   //B
     glVertex3d(1,0.2,0); //C
     glVertex3d(0,0.2,0); //D

    glColor3ub(110,60,0); //face DROITE
     glVertex3d(1,0,0);   //B
     glVertex3d(1,0,8);   //F
     glVertex3d(1,0.2,8);  //G
     glVertex3d(1,0.2,0); //C

    glColor3ub(70,30,0); //face DESSOUS
     glVertex3d(0,0,0);   //A
     glVertex3d(1,0,0);   //B
     glVertex3d(1,0,8);   //F
     glVertex3d(0,0,8);    //E

    glColor3ub(110,60,0); //face GAUCHE
     glVertex3d(0,0,0);   //A
     glVertex3d(0,0,8);    //E
     glVertex3d(0,0.2,8);   //H
     glVertex3d(0,0.2,0); //D

    glColor3ub(70,30,0); //face DERIERE
     glVertex3d(0,0,8);    //E
     glVertex3d(1,0,8);   //F
     glVertex3d(1,0.2,8);  //G
     glVertex3d(0,0.2,8);   //H

    glColor3ub(170,80,0); //face DESSUS
     glVertex3d(0,0.2,0); //D
     glVertex3d(1,0.2,0); //C
    glColor3ub(255,180,110);
     glVertex3d(1,0.2,8);  //G
     glVertex3d(0,0.2,8);   //H
      glEnd();


     for (double i = 0; i<1.1; i=i+0.2)
     {
         glBegin(GL_LINES);
        glColor3ub(180,180,180);
         glVertex3d(i,0.201,0);
         glVertex3d(i,0.201,8);
        glEnd();
     }

     for (double i = 0; i<8.1; i=i+0.5)
     {
         glBegin(GL_LINES);
        glColor3ub(180,180,180);
         glVertex3d(0,0.201,i);
         glVertex3d(1,0.201,i);
        glEnd();
     }

}


void defiler()
{

    for (double Tz=8;Tz>0;Tz=Tz-0.01)
    {

      Quadz (0.8, 0.2, Tz, 0.2, 0.0625, 0.0500, 1, 0, 1);

      //Sleep(5);

    }

}