public void move() {
Vector2 nextDirection =
Vector2.add(new Vector2(getHead().getX(), getHead().getY()), _direction);
if (nextDirection.x < SNAKE_WIDTH * 2
|| nextDirection.x >= _mapWidth - SNAKE_WIDTH * 2
|| nextDirection.y < SNAKE_WIDTH * 2
|| nextDirection.y >= _mapHeight - SNAKE_WIDTH * 2) {
turned();
return;
}
if (_steps == 0) {
turned();
}
_steps++;
boolean isTurned = false;
if (_steps >= SNAKE_WIDTH) {
_steps = 0;
isTurned = true;
}
_body.move(isTurned);
}
public float handleSceneTouch(TouchEvent pSceneTouchEvent) {
Vector2 v =
new Vector2(
getHead().getX() - pSceneTouchEvent.getX(), getHead().getY() - pSceneTouchEvent.getY());
float angle = v.getAngle();
if ((0 <= angle && angle <= 45) || (315 < angle && angle < 360)) {
setDirection(SnakeDirection.RIGHT);
} else if (45 < angle && angle <= 135) {
setDirection(SnakeDirection.UP);
} else if (135 < angle && angle <= 225) {
setDirection(SnakeDirection.LEFT);
} else if (225 < angle && angle <= 315) {
setDirection(SnakeDirection.DOWN);
}
return angle;
}
public boolean setDirection(final SnakeDirection pDirection) {
Vector2 d = SnakeDirection.toVector(pDirection);
if (_lastDirection == null || !Vector2.opposite(d, _lastDirection)) {
_direction = d;
return true;
}
return false;
}