private void setAxes(){
        switch(nbThreads){
        case 1:
            pos = new Vector2f(0,0);
            break;
        case 4 :
            switch(idThread){
            case 1:
                pos = new Vector2f(0,0);
                break;
            case 2:
                pos = new Vector2f(width/2,0);
                break;
            case 3:
                pos = new Vector2f(0,height/2);
                break;
            case 4:
                pos = new Vector2f(width/2,height/2);
                break;
            }
            double x_mid = (x_max+x_min)/2.;
            double y_mid = (y_max+y_min)/2.;
            x_min = (pos.x==0)?x_min:x_mid;
            x_max = (pos.x==0)?x_mid:x_max;
            y_min = (pos.y==0)?y_min:y_mid;
            y_max = (pos.y==0)?y_mid:y_max;
            width /=4;
            height /=2;
            break;
        case 8 :
            switch(idThread){
            case 1:
                pos = new Vector2f(0,0);
                break;
            case 2:
                pos = new Vector2f(width/4,0);
                break;
            case 3:
                pos = new Vector2f(width/2,0);
                break;
            case 4:
                pos = new Vector2f(width-width/4,0);
                break;
            case 5:
                pos = new Vector2f(0,height/2);
                break;
            case 6:
                pos = new Vector2f(width/2,height/2);
                break;
            case 7:
                pos = new Vector2f(width/4,height/2);
                break;
            case 8:
                pos = new Vector2f(width-width/4,height/2);
                break;
            }
            double x_mid = (x_max+x_min)/2.;
            double y_mid = (y_max+y_min)/2.;
            x_min = (pos.x==0)?x_min:x_mid;
            x_max = (pos.x==0)?x_mid:x_max;
            y_min = (pos.y==0)?y_min:y_mid;
            y_max = (pos.y==0)?y_mid:y_max;
            width /=2;
            height /=2;

            break;
        }
    }