using UnityEngine;
using RootMotion.FinalIK;
using System.Collections;

/// <summary>
/// Handles all the IK processing.
/// This runs after Unity's Mecanim and utilises FinalIK asset.
/// It allows for runtime modifications to animations for a better experience (e.g. interacting with the game world while still using motion capture animations)
/// </summary>
public class IKProcessor {

	private GameObject go;

	// Final IK
	private LookAtIK lookAtIK;
	private FullBodyBipedIK fbIK;

	// Vars
	public Vector3 LookAtPos { get; set; }

	public IKProcessor(GameObject go) {
		this.go = go;
		lookAtIK = go.GetComponent<LookAtIK>();
		fbIK = go.GetComponent<FullBodyBipedIK>();

		lookAtIK.Disable();		// if this is commented out it works
		fbIK.Disable();			// if this is commented out it works
	}

	// This should only be called from a MonoBehaviour.LateUpdate()
	public void LateUpdate() {
		lookAtIK.solver.IKPositionWeight = 1f;
		lookAtIK.solver.IKPosition = LookAtPos;
		//Debug.DrawRay(go.transform.position, LookAtPos - go.transform.position);

		lookAtIK.solver.Update();	// if this is commented out it works
	}

}