statemachine class CKNGWISP extends W3UsableItem {

	private var wispCurrentRotationCircleAngle : float;

	private var wispCurrentRotation : EulerAngles;

	private var wispCurrentPosition : Vector;
	private var wispCurrentVelocity : Vector;
	private var wispCurrentAcceleration : Vector;

	private var wispGoalPositionOffset : Vector;
	private var wispGoalPositionOffset_regenerateInSeconds : float;






	private var isActive						:	bool;

	private	var entity							:	CEntity;
	private	var entityTemplate					:	CEntityTemplate;
	private	var resourcePath					:	string;



	default itemType = UI_Apple;
	default isActive = false;

	event OnUsed(usedBy : CEntity) {

		if(usedBy == thePlayer && !isActive) {

			SpawnWisp();

		}
	}

	event OnHidden(hiddenBy : CEntity) {

		if(hiddenBy == thePlayer && isActive) {

			entity.RemoveTimer('FollowPlayer');
			entity.StopAllEffects();
			entity.DestroyAfter(0.1);

			isActive = false;

		}
	}

	event OnSpawned( spawnData : SEntitySpawnData ) {

		entity.AddTimer('CheckIfFactExists', 2, false);
	}

	timer function CheckIfFactExists(deltaTime : float, id : int) {

		theGame.GetGuiManager().ShowNotification(FactsDoesExist("kngwisp_used"));

		if(FactsDoesExist("kngwisp_used")) {

			theGame.GetGuiManager().ShowNotification("Fact does exist!");

		}


	}


	private function SpawnWisp() {

		resourcePath = "dlc\dlckngwisp\data\w2ent\kngwisp.w2ent";

		entityTemplate = (CEntityTemplate)LoadResource(resourcePath,true);

		entity = theGame.CreateEntity(entityTemplate, thePlayer.GetWorldPosition() + Vector(0,0,2), thePlayer.GetWorldRotation());

		entity.AddTag('KNGWISP');

		isActive = true;

		thePlayer.PlayVoiceset( 100, "Swears" );

		entity.AddTimer('FollowPlayer', 0.0001, true);

		// set wisp initial position and initial velocity to be like it was released upwards
		wispCurrentPosition = thePlayer.GetWorldPosition() + Vector(0,0,2);
		wispCurrentVelocity = Vector(0,0,10);
		wispCurrentAcceleration = Vector(0,0,0);
	}

	timer function FollowPlayer(deltaTime : float, id : int) {

		var playerPosition : Vector;
		var playerRotation : EulerAngles;
		var wispGoalPosition : Vector;
		var goalAcceleration : Vector;
		var navigationComputeZReturn : float;


		// CONSTANTS start
		var rotationCircleRadius : float;
		var rotationCircleMovementSpeed : float;
		var selfRotationSpeed : float;
		var maxAcceleration : float;
		var maxVelocity : float;
		var velocityDampeningFactor : float;
		rotationCircleMovementSpeed = 25;
		rotationCircleRadius = 0.75;
		selfRotationSpeed = 0.3;
		maxAcceleration = 100;
		maxVelocity = 20;
		velocityDampeningFactor = 0.9;
		// CONSTANTS end

		// increase
		wispCurrentRotationCircleAngle += deltaTime * rotationCircleMovementSpeed;
		// if rotation incresed over 360 degrees make sure its under 360
		while(wispCurrentRotationCircleAngle > 360) {
			wispCurrentRotationCircleAngle -= 360;
		}

		playerPosition = thePlayer.GetWorldPosition();
		playerRotation = thePlayer.GetWorldRotation();

		// calculate wisp Goal position
		wispGoalPosition = playerPosition;
		wispGoalPosition += wispGoalPositionOffset;
		wispGoalPosition.X += CosF(Deg2Rad(wispCurrentRotationCircleAngle)) * rotationCircleRadius;
		wispGoalPosition.Y += SinF(Deg2Rad(wispCurrentRotationCircleAngle)) * rotationCircleRadius;
		wispGoalPosition.Z += 2;

		// see if we can set new random wisp position offset
		wispGoalPositionOffset_regenerateInSeconds -= deltaTime;
		if(wispGoalPositionOffset_regenerateInSeconds < 0) {
			wispGoalPositionOffset_regenerateInSeconds = RandRangeF(1, 0.1);
			wispGoalPositionOffset = VecRand() * rotationCircleRadius * 0.25;
		}

		// accelerate towards goal position
		wispCurrentAcceleration = wispGoalPosition - wispCurrentPosition;

		// clamp wisp acceleration, so its not too fast
		if(VecLength(wispCurrentAcceleration) > maxAcceleration) {
			wispCurrentAcceleration = VecNormalize(wispCurrentAcceleration) * maxAcceleration;
		}

		// simulate acceleration and velocity for more natural movement
		wispCurrentVelocity += wispCurrentAcceleration * deltaTime;

		// dampen velocity
		wispCurrentVelocity *= velocityDampeningFactor;

		// clamp wisp velocity, so its not too fast
		if(VecLength(wispCurrentVelocity) > maxVelocity) {
			wispCurrentVelocity = VecNormalize(wispCurrentVelocity) * maxVelocity;
		}

		// get the height
		if (theGame.GetWorld().NavigationComputeZ( wispCurrentPosition, wispCurrentPosition.Z - 1, wispCurrentPosition.Z + 1, navigationComputeZReturn ) )
		{
			// if wisp is too close to collision, bounce off it and loose some velocity
			if(AbsF(wispCurrentPosition.Z - navigationComputeZReturn) < 0.1) {
				wispCurrentVelocity.Z *= -0.9;
			}
		}

		// simulate acceleration and velocity for more natural movement
		wispCurrentPosition += wispCurrentVelocity * deltaTime;

		// if wisp is too far away, just teleport it back to player
		if(VecDistance(wispCurrentPosition, wispGoalPosition) > 100) {
			wispCurrentPosition = wispGoalPosition;
			wispCurrentVelocity = Vector(0,0,0);
			wispCurrentAcceleration = Vector(0,0,0);
		}

		// rotate wisp it self over time
		wispCurrentRotation.Pitch += deltaTime * selfRotationSpeed;

		// finall set the wisp position and rotation
		this.TeleportWithRotation(wispCurrentPosition, wispCurrentRotation);

	}


}

exec function spawnWisp() {

	// var mKNGWISP : CKNGWISP;
	// mKNGWISP = new CKNGWISP in theGame;
	// mKNGWISP.Spawn();

	var entity						:	CEntity;
	var entityTemplate				:	CEntityTemplate;
	var resourcePath				:	string;

	resourcePath = "dlc\dlckngwisp\data\w2ent\kngwisp.w2ent";

	entityTemplate = (CEntityTemplate)LoadResource(resourcePath,true);

	entity = theGame.CreateEntity(entityTemplate,thePlayer.GetWorldPosition()+Vector(0,0,2), thePlayer.GetWorldRotation());

	entity.AddTag('KNGWISP');



}