tank.getTurret().setAngle(180-tank.getTurret().getMouseAngle());
if(Mouse.next()){
if(Mouse.isButtonDown(0)){
Shell shell = new Shell(em,tank,tank.getX(),tank.getY(),3,1,(int) tank.getTurret().getAngle());
tank.addShell(shell);
moveShell(shell);
}
if(Mouse.isButtonDown(1)){
createExplosion(100);