File content as of revision 49:243b5e826228:

void pong(){
    int p_height = 40,p_width = 5,b_r =5;
    int p_y,p_yl,b_x,b_xl,b_y,b_yl = 0;
    int vX =5 ,vY = 5;
    int multiplier = 30;
    float tsi_current, tsi_last = 0;
    TFT.cls();
    TFT.line(p_width,0,320,0,White);
    TFT.line(320,0,320,240,White);
    TFT.line(p_width,240,320,240,White);
    b_x = 160;
    b_y = 120;
    while (true){
        readX();
        if (touching == 1){
            //f_state = 1;
            //break;
        }
            tsi_current = tsi.readPercentage();
            float change = 0;  
            if (tsi_current != 0 && tsi_last != 0) {change = tsi_current - tsi_last;}
            else {change = 0;}
            tsi_last = tsi_current;
            int delta = change * multiplier;
            int newval = p_y + delta ;
            if (newval > 0 && newval < (240 - p_height)) p_y = newval;
        if (b_y < 10 || b_y > 230){
            vY *= -1;
        }
        if (b_x > 310 || (b_x < p_width)){
            vX *= -1;
            if (!(b_y > p_y && b_y < (p_y + p_height) &&(b_x < p_width)))  {f_state = 1; break;}
        }
        
        b_x += vX;
        b_y += vY;
        if (p_y != p_yl){
            TFT.fillrect(0,p_yl,p_width,p_yl + p_height,Black);
            TFT.fillrect(0,p_y, p_width, p_y + p_height, White);
        }
        if (b_y != b_yl || b_x != b_xl){
            TFT.fillcircle(b_xl,b_yl,b_r,Black);
            TFT.fillcircle(b_x,b_y,b_r,White);
            b_yl = b_y;
            b_xl = b_x;
        }
        wait(0.5);
    }

}