public override Vector2 Steer(ISteeringTarget target)
{
var dv = Leader.Velocity;
var force = Vector2.Zero;
dv.Normalize();
dv *= LeaderBehindDist;
_ahead = Leader.Position + dv;
dv *= -1;
_behind = Leader.Position + dv;
//if (IsOnLeaderSight(_ahead))
// force += _evade.Steer(Leader as ISteeringTarget);
ISteeringBehavior nestedBehavior = NestedBehavior ?? _arrival;
return(force + nestedBehavior.Steer((Vector2SteeringTarget)_behind));
}
public override Vector2 Steer(ISteeringTarget target)
{
if (!target.IsActual) // We've completed the path, need to stop now
{
return(-SteeringEntity.Velocity);
}
var pathComp = target as PathComponent;
if (pathComp == null)
{
throw new Exception("Incorrect pathing target (use PathComponent)");
}
var path = pathComp.Path;
if (path.NodeCount == 0)
{
return(-SteeringEntity.Velocity);
}
if (PathFollowingMode == PathFollowingMode.Patrol)
{
var targetNode = path[_currentNode];
if (targetNode != null)
{
/*var distance = (SteeringEntity.Position - targetNode.Target).Length();
*
* if (distance <= targetNode.TargetRadius)*/
if (IsWithinTarget(targetNode))
{
_currentNode += _pathDir;
if (_currentNode >= path.NodeCount || _currentNode < 0)
{
_pathDir *= -1;
_currentNode += _pathDir;
}
targetNode = path[_currentNode];
}
return(_pathFollowingBehavior.Steer((Vector2SteeringTarget)targetNode.Target));
}
}
else if (PathFollowingMode == PathFollowingMode.Circular)
{
var targetNode = path[_currentNode % path.NodeCount];
if (targetNode != null)
{
/*var distance = (SteeringEntity.Position - targetNode.Target).Length();
*
* if (distance <= targetNode.TargetRadius)*/
if (IsWithinTarget(targetNode))
{
_currentNode++;
targetNode = path[_currentNode % path.NodeCount];
}
return(_pathFollowingBehavior.Steer((Vector2SteeringTarget)targetNode.Target));
}
}
else if (PathFollowingMode == PathFollowingMode.OneWay)
{
var targetNode = path.GetTargetNode();
if (targetNode != null)
{
/*var distance = (target.Position - SteeringEntity.Position).Length();
*
* if (distance <= targetNode.TargetRadius)*/
if (IsWithinTarget(targetNode))
{
path.RemoveTargetNode();
}
return(_pathFollowingBehavior.Steer((Vector2SteeringTarget)targetNode.Target));
}
}
return(-SteeringEntity.Velocity);
}
