AI Behavior Trees

[coreys]

I have to agree with WD here 100%. (Also, I prefer JSON but still haven't gotten around to finishing a JSON parser for GS2...)

Anyways, new release!

Behavior Tree Version 1.1
I have added the ability to load behavior trees from a simple file format.

PHP Code:

this.behavior = new TStaticVar();
this.behavior.join("ai-behaviortree");
this.behavior.loadFromFile("behavior_tree_name", this); 


This will load a behavior tree from a "behaviors/behavior_tree_name.txt" dynamically. Make sure that your npc-server has rights to this. The comments in the script should explain the further details.

Here's what the example script in the first post looks like in file format:

PHP Code:

rootSelector
  leaf search %this
    decorator filter %this,state,idle
    getParent
  sequence
    decorator filter %this,state,chase
    leaf findPath %target
      getParent
    leaf move %this
      decorator loop %path_size
      getParent
    getParent
  sequence
    decorator filter %this,state,attack
    leaf attack %this
      getParent
    macro pause 0.5
    getParent
  sequence
    decorator filter %this,state,dead
    macro setCharAni, dead
    getParent 


You may note that what was once this.path.size() is now %path_size. Unfortunately, I don't have any real way to allow calling a function of an object like that, so for situations like that you'll have to save info like that elsewhere, in this case a variable called path_size.

The next step is a Behavior Tree editor, so you won't have to mess with any of this!