/// <summary>
/// This behavior is similar to seek but it attempts to arrive at the
/// target with a zero velocity
/// </summary>
/// <param name="target"></param>
/// <param name="decel"></param>
/// <returns></returns>
protected Vector2D calculateArriveVector(Vector2D target, DecelerationState decel)
{
Vector2D toTarget = target - _player.Position;
//calculate the distance to the target
double dist = toTarget.Length;
if (dist > 0.0)
{
//because Deceleration is enumerated as an int, this value is required
//to provide fine tweaking of the deceleration..
double decelerationTweaker = 0.3;
//calculate the speed required to reach the target given the desired
//deceleration
double speed = dist / ((double)decel * decelerationTweaker);
//make sure the velocity does not exceed the max
speed = Math.Min(speed, _player.MaxSpeed);
//from here proceed just like Seek except we don't need to normalize
//the ToTarget vector because we have already gone to the trouble
//of calculating its length: dist.
Vector2D desiredVelocity = toTarget * speed / dist;
return(desiredVelocity - _player.Velocity);
}
return(new Vector2D(0, 0));
}
/// <summary>
/// This behavior is similar to seek but it attempts to arrive at the
/// target with a zero velocity
/// </summary>
/// <param name="target"></param>
/// <param name="decel"></param>
/// <returns></returns>
protected Vector2D calculateArriveVector(Vector2D target, DecelerationState decel)
{
Vector2D toTarget = target - _player.Position;
//calculate the distance to the target
double dist = toTarget.Length;
if (dist > 0.0)
{
//because Deceleration is enumerated as an int, this value is required
//to provide fine tweaking of the deceleration..
double decelerationTweaker = 0.3;
//calculate the speed required to reach the target given the desired
//deceleration
double speed = dist / ((double)decel * decelerationTweaker);
//make sure the velocity does not exceed the max
speed = Math.Min(speed, _player.MaxSpeed);
//from here proceed just like Seek except we don't need to normalize
//the ToTarget vector because we have already gone to the trouble
//of calculating its length: dist.
Vector2D desiredVelocity = toTarget * speed / dist;
return (desiredVelocity - _player.Velocity);
}
return new Vector2D(0, 0);
}