Using Sendmessage and behavior trees

[JsmuckerParticipant]

I am trying to send a message using a custom action and making a new class. Here is what I have so far in the class I created:

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using RAIN.Action;
using RAIN.Core;
[RAINAction]
public class TakeDamage : RAINAction
{
    public override void Start(AI ai)
    {
		ai.gameObject.SendMessage("Damage", 1.0f, SendMessageOptions.DontRequireReceiver);
        base.Start(ai);
    }
    public override ActionResult Execute(AI ai)
    {
        return ActionResult.SUCCESS;
    }
    public override void Stop(AI ai)
    {
        base.Stop(ai);
    }
}

I’ve tried using all of these instead of the sendmessage in the code.
GameObject.SendMessage: Returns error “An object reference is required to access non-static member”
Component.SendMessage: Returns error “An object reference is required to access non-static member”
gameObject.SendMessage: Returns error “The name `gameObject’ does not exist in the current context”
SendMessage: Returns error “The name `SendMessage’ does not exist in the current context”
ai.gameObject: returns error “RAIN.Core.AI’ does not contain a definition for `gameObject’ and no extension method `gameObject’ of type”
Any ways to do this successfully?

[primeKeymaster]

ai.Body.SendMessage is what you want.

The “Body” of the AI is the parent game object that the AI controls.

[JsmuckerParticipant]

Awesome, that fixed the error, but for some reason the send message is going to the wrong gameobject. I am very inexperienced in c# and don’t know what I am doing wrong. The sendmessage is sending a damage function to the enemy instead of the player for some reason. I originally got the function to work when I put it in a script attached to the enemy and used this format to get the message to the player(“Hero”):

void OnTriggerEnter(Collider other) {
    if (other.name == "Hero")
        other.SendMessage("Damage", 1.0f, SendMessageOptions.DontRequireReceiver);
}

[primeKeymaster]

So Hero is the player? I’m a little confused because your custom action is called TakeDamage. Is it applying damage to itself or to some other object?

[JsmuckerParticipant]

It should be applying damage to some other object.

[primeKeymaster]

ai.Body will be the game object of the AI itself, so you don’t want that. If you are applying damage to an object that you detected with a sensor, and you are setting the Form Variable through the sensor, then

GameObject tSensedObject = ai.WorkingMemory.GetItem<GameObject>("myFormVariable"); //whatever your variable name is, which should be used in the Form Variable field of the sensor
tSensedObject.SendMessage("Damage", 1.0f, SendMessageOptions.DontRequireReceiver);

[Author]

Posts