public void GoTo(Vector2 destination)
{
_destination = destination;
if (Position == MovingPosition.Standing)
{
Position = MovingPosition.Moving;
}
}
public override void Update()
{
if (Position != MovingPosition.Standing)
{
if (_position.X.CompareTo(_destination.X) != 0)
{
_position.X = MoveCharacter(_position.X, _destination.X, MovingPosition.Right, MovingPosition.Left);
}
else if (_position.Y.CompareTo(_destination.Y) != 0)
{
_position.Y = MoveCharacter(_position.Y, _destination.Y, MovingPosition.Down, MovingPosition.Up);
}
else
{
ChangeFrame((int)Position - 1);
Position = MovingPosition.Standing;
_moveFrame = 1;
}
}
}
/// <summary>
/// Movings character one *speed* pixels towards the destination.
/// </summary>
/// <param name="position">Starting position</param>
/// <param name="dest">Final destination</param>
/// <param name="plus">Negative direction, object is in the origin</param>
/// <param name="minus">Positive direction, object is in the origin<param>
/// <return>New position of the character</return>
private float MoveCharacter(float position, float dest, MovingPosition plus, MovingPosition minus)
{
if (position.CompareTo(dest) == 0)
{
return(position);
}
// Determinating to which side we need to go
var move = (dest - position) / Math.Abs(dest - position);
Position = (move > 0) ? plus : minus;
// Determinating next frame
ChangeFrame((int)Position * (_texture.Rows - 1) + _moveFrame);
_moveFrame += _moveWay;
if (_moveFrame == _texture.Cols - 1)
{
_moveWay = -1;
}
else if (_moveFrame == 0)
{
_moveWay = 1;
}
// Actual moving. Be carefull not to past the destination
var newPosition = position + move * Speed;
if (position < dest && newPosition > dest || position > dest && newPosition < dest)
{
position = dest;
}
else
{
position = newPosition;
}
return(position);
}
