How to destroy a character though RAINaction

[HiddEnigmaParticipant]

Hello!

I’m a newbie programmer, and I’m testing RAIN to see how far I can go by myself. I’m making a behavior tree where, when a character’s health reaches 0, it is destroyed. I can only see that working through a custom action.

Problem is, I don’t know how to use the Destroy() function within that custom action script. How would I go about destroying a character using that custom action script?

Thank you in advance.

• This topic was modified 2 years, 5 months ago by  HiddEnigma.

[HiddEnigmaParticipant]

Nevermind, I managed to make the behavior tree destroy the game object using

MonoBehaviour.Destroy (ai.Body);

But no matter where I put that in my custom action — Start, Execute OR Stop — the game always initializes with the gameObject already missing.

In my behavior tree, I have a Selector with a constraint ( health > 0 ) that animates the character’s movement, and outside of the constraint, the custom action.

So kinda like Selector - > constraint - > animates if health > 0
- > else destroys.

Any thoughts on what I’m doing wrong?

• This reply was modified 2 years, 5 months ago by  HiddEnigma.

[CodersExpoParticipant]

Good job working it out. Make sure you add that statement in a condition within the custom action.

if(ai.WorkingMemory.GetItem<float>(“health”) <= 0)
{
MonoBehaviour.Destroy(ai.Body);
}

Destroy, as you know, is a MonoBehavior. I personally like keeping Unity scripts and logic separate. Just a preference. Another way to do this is create a mono script attached to your guy that has a method in it to destroy him. You can use send message to execute the method.

//From RAIN custom action script
ai.Body.gameObject.SendMessage(“KillGuy”);

//MonoBehavior
public void KillGuy()
{
//public variable “MyGuy” has the character object assigned
Destroy(MyGuy);
}

Anyway, there are many ways to kill a cat (lol I kill myself)…hope this helps

[HiddEnigmaParticipant]

Thanks for the help! Yeah, I originally thought of using the ai.WorkingMemory, but then I thought that, if I’m using a constraint for all my actions while alive ( health > 0f), shouldn’t the customAction be called only if my character’s already dead (health < 1f)?

Even before I thought of ai.WorkingMemory, I thought of just slapping a script onto my character, and leave it at that. It’d work, sure, but I thought that it’d be better for it to be represented in the Behaviour Tree, since it’s kinda a behaviour as well.

• This reply was modified 2 years, 5 months ago by  HiddEnigma.

[CodersExpoParticipant]

Oh I see…yes you can do this…

-Root
-Selector
—Constraint health >= 100 (Add the health variable in the AIRig memory. Also don’t put the f after 100 in the constraint.)
—-Animation or Move Nodes for example should repeat or have some sequence of node that will return a success.
—Custom Action to destroy (This node will not run if the constraint node and its child nodes sequence return a success.

[CodersExpoParticipant]

Sorry, constraint health > 0

[tapticcParticipant]

Cheers for the example, this helped me figure out how to swap out a character with one AI for another character with its own mesh and AI.

I have a SpawnController game object (tagged as well) with this script attached:

public class SpawnController : MonoBehaviour {
public GameObject newZombie;

public void SpawnZombie(Vector3 newLocation,Quaternion newRotation)
{
Instantiate (newZombie, newLocation, newRotation);
}
}

My “old” character has this script attached:

public class NerdController : MonoBehaviour {
private SpawnController spawnController;

// Use this for initialization
void Start () {
spawnController = GameObject.FindGameObjectWithTag (“SpawnController”).GetComponent <SpawnController> ();
}

public void NerdToZombie()
{
spawnController.SpawnZombie (gameObject.transform.position, gameObject.transform.rotation);
Destroy(gameObject);
}
}

The behaviour tree calls a Custom Action which sends a message to any script attached to the game object with a function called “NerdToZombie”:

public override ActionResult Execute(AI ai)
{
ai.Body.gameObject.SendMessage(“NerdToZombie”);

return ActionResult.SUCCESS;
}

I’m sharing this as it’s really difficult to piece together example snippets when you don’t know what to look for

[Author]

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