NPCState

Hello,


Ok so I have been assigned to work on a Unity project developped by a third party with which communication is not possible and I need some help to understand their code.

I have an character which walks through some "Waypoints". The Waypoints are defined by some empty objects having a transform.


I have been asked to change the trajectory of the caracter by adding some new waypoints.

For each Waypoint, the charatcter as a script named "MaillGoToPoisition" as shown here at the right in the inspector:





Already there there is something I so not understand. Why does each scipt has a "script name" variable ?


Here is the script:

using UnityEngine;
public class MallGoToPosition : GoToPosition {
public override void Do()
{
animator.SetBool("isWalking", true);
Vector3 vec = agent.pathEndPosition - transform.position;
vec.y = 0;
if(vec.sqrMagnitude < 0.01f)
{
SendMessage("NextState");
}
}
}


Also in the inspector, my character has another script named "NPcStatesContoller", which contains an array of the "NPCState" data type. The problem is I can't understand how to set the elements of this NPCState array. They appear in green in the inspector and I do not understand what I should drag on it. They seem to be related to the "script name" variable defined for each GoToPosition script.





Here is the NPCStatesController script:

using UnityEngine;
public class NPCStatesController : NamedMonoBehaviour, IActivatable {

public NPCState[] npcStates;
public bool loops;

public bool debug;
public int startingStateIndex = 0;

private int currentStateIndex = 0;

void Awake()
{
currentStateIndex = startingStateIndex;
}

public void Activate ()
{
NextState();
}
public void Start()
{
if(npcStates.Length > currentStateIndex)
npcStates[currentStateIndex].Enter();
}
public void Update()
{
if(debug)
Debug.Log("Current State : " + npcStates[currentStateIndex].name);

if(npcStates.Length > currentStateIndex)
npcStates[currentStateIndex].Do();
}

public void NextState()
{
npcStates[currentStateIndex].Exit();
++currentStateIndex;

if(loops && currentStateIndex == npcStates.Length)
currentStateIndex = 0;

npcStates[currentStateIndex].Enter();
}
}


I searched everywhere and can not find the definition of "NPCState".

It seems I am missing a part of the puzzle. There is something I do not grasp.

Thanks alot !

 

My message might be too long and unclear.


I just want to know what I should drag in the nspector to fill the NPCState array. Those appear in green in the last picture such as [GoToWaipoint 1].


I do not understand how to associate those NPCState s with my Waypoint transforms, which have matching script names associated.

I understand it is a very specific question tightly linked to a specific implementation.

 

Ok so I found the definition of NPCState:



using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
public abstract class NPCState : NamedMonoBehaviour {
public abstract void Enter();
public abstract void Do();
public abstract void Exit();
}



And I realised that GoToPOsition inherits NPCState:


using UnityEngine;
public class GoToPosition : NPCState {

public Transform target;

protected UnityEngine.AI.NavMeshAgent agent;
protected Animator animator;

void Awake()
{
agent = GetComponent<UnityEngine.AI.NavMeshAgent>();
agent.autoRepath = false;
agent.autoBraking = true;
agent.autoTraverseOffMeshLink = true;
animator = GetComponent<Animator>();
}

public override void Enter()
{
agent.SetDestination(target.position);
animator.SetBool("isWalking", true);
}
public override void Do()
{
Vector3 distance = agent.pathEndPosition - transform.position;
distance.y = 0;
if(agent.hasPath && distance.sqrMagnitude < 0.01f)
{
SendMessage("NextState");
}
}

public override void Exit()
{
}

void OnDrawGizmosSelected()
{
if(target != null && scriptName != "GoTo" + target.name)
scriptName = "GoTo" + target.name;
}
}



So, my problem is about "NamedMonoScriptBehaviour".. it has a script name field.


That is where I am blocked around.

I give a name to each MallGoToPosition script a name that must be refered into the PCState array. The problem is that I do not understand how reference a given script name into the NPCState array of the NPCStateController.