"GetItem()" the "Move Target Variable" Programmatically

[VarunVPParticipant]

Hey guys!
I am trying to integrate Steering behaviours and RAIN for my AI. I use a custom action to set the TargetPoint variable for the steering script. Problem is that I want to get the Move Target Variable from the Waypoint Patrol node through script(using GetItem<T>(),) but it always returns a zero vector. How can I get variables that are defined in the BT interface?

Here is the custom Action:

SteerForPoint vehicle;
	GameObject thisGameobject;
	BasicMemory aiMemory;
    public override void Start(RAIN.Core.AI ai)
    {
		thisGameobject = ai.Body;
		vehicle = thisGameobject.GetComponent<SteerForPoint>();
		Debug.Log(ai.WorkingMemory.GetItem<Vector3>("moveToPoint"));       //Displays 0 vector in console
        base.Start(ai);
    }

I observed that when I set a variable prior to this in the code, then it works as expected. I don’t understand what the problem is.

[VarunVPParticipant]

The console prints a 0 vector even though i have an expression assigning the variable. The scriptMoveTo variable is initialised in one action, and it is printed from another.That shouldn’t be much of a problem, should it?
The memory panel shows that the variable is correctly being updated. It’s the getting part in the action I am messing up in.

InitialiseVariables.cs(The First action):

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using RAIN.Action;
using RAIN.Core;
[RAINAction]
public class InitialiseVariables : RAINAction
{
	public GameObject thisGameObject;
    public override void Start(RAIN.Core.AI ai)
    {
        base.Start(ai);
		ai.WorkingMemory.SetItem<Vector3>("scriptMoveTo", Vector3.zero); 
		ai.WorkingMemory.SetItem<GameObject>("thisGO", ai.Body);
    }
    public override ActionResult Execute(RAIN.Core.AI ai)
    {
        return ActionResult.SUCCESS;
    }
    public override void Stop(RAIN.Core.AI ai)
    {
        base.Stop(ai);
    }
}

WaypointFollow.cs(3rd action):

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using RAIN.Action;
using RAIN.Core;
using RAIN.Memory;
using UnitySteer.Behaviors;
[RAINAction]
public class WaypointFollow : RAINAction
{
	SteerForPoint vehicle;
	GameObject thisGameobject;
	public Vector3 point;
	BasicMemory aiMemory;
    public override void Start(RAIN.Core.AI ai)
    {
        base.Start(ai);
    }
    public override ActionResult Execute(RAIN.Core.AI ai)
    {
		Debug.Log(ai.WorkingMemory.GetItem<GameObject>("thisGO"));
		Debug.Log(ai.WorkingMemory.GetItem<Vector3>("scriptMoveTo"));
		thisGameobject = ai.Body;
		vehicle = thisGameobject.GetComponent<SteerForPoint>();
		vehicle.TargetPoint = ai.WorkingMemory.GetItem<Vector3>("scriptMoveTo");
        return ActionResult.SUCCESS;
    }
    public override void Stop(RAIN.Core.AI ai)
    {
        base.Stop(ai);
    }
}

Please ask for any clarifications.

• This reply was modified 2 months, 3 weeks ago by  VarunVP.

[ShimakazeParticipant]

Hi,
In my experience, you need use ai.WorkingMemory.GetItemType() to get type first.
I guess the type is not Vector3.

Best regards.

[VarunVPParticipant]

OH! By the way, I now use a completely different approach using A* and UnitySteer. Works like a charm. Thanks for the reply @Shimakaze!

[Author]

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