protected Vector2 SteerToFollowPath(int direction, float predictionTime, Path path)
{
float pathDistanceOffset = direction * predictionTime * speed;
Vector2 futurePosition = PredictFuturePosition(predictionTime);
float nowPathDistance = path.MapPointToPathDistance(position);
float futurePathDistance = path.MapPointToPathDistance(futurePosition);
bool rightway = ((pathDistanceOffset > 0) ? (nowPathDistance < futurePathDistance) : (nowPathDistance > futurePathDistance));
Vector2 tangent;
float outside;
path.MapPointToPath(futurePosition, out tangent, out outside);
if ((outside < 0.0f) && rightway)
{
return Vector2.zero;
}
else
{
float targetPathDistance = nowPathDistance + pathDistanceOffset;
Vector2 target = path.MapPathDistanceToPoint(targetPathDistance);
return SteerForSeek (target);
}
}
protected Vector2 SteerToStayOnPath (float predictionTime, Path path)
{
Vector2 futurePosition = PredictFuturePosition(predictionTime);
Vector2 tangent;
float outside;
Vector2 onPath = path.MapPointToPath(futurePosition, out tangent, out outside);
if (outside < 0.0f) return Vector2.zero;
else return SteerForSeek(onPath);
}