private static SteeringVelocity Arrive(Entity <Game> owner, FixVec2 target)
{
var tolerance = owner.Get <ArrivalTolerance>();
var position = owner.Get <Position>().Value;
target.Sub(ref position);
var distance = target.Magnitude;
if (distance <= tolerance.Distance)
{
return(SteeringVelocity.Zero);
}
var maxVelocity = owner.Get <MaxVelocity>().Value;
var decelerationDistance = tolerance.DecelerationDistance;
if (distance <= decelerationDistance)
{
maxVelocity *= distance / decelerationDistance;
}
var velocity = target / distance * maxVelocity;
return(new SteeringVelocity(FixVec2.ClampMagnitude(velocity, maxVelocity)));
}