public MoveAnimation(Vector2 start, Vector2 end)
{
_start = start;
_end = end;
_type = MoveAnimationType.TWO_POINTS;
}
public MoveAnimation(Vector2 direction, Func <float, float, Vector2> function = null)
{
_direction = direction;
_function = function;
_type = MoveAnimationType.DIRECTION;
}