Core 05 Creating And Using Trees

Creating Trees Manually

You can create a tree manually, defining all nodes in the graph in code. For example:

var tree = new b3.BehaviorTree();

tree.root = new b3.Sequence({children: [
    new b3.Priority({children: [
        new MyCustomNode(),
        new MyCustomNode()
    ]}),
]});

Creating Trees From JSON

You also can create a tree from JSON files, usually created in the editor:

var tree = new b3.BehaviorTree();

tree.load({
    'title'       : 'Behavior Tree title'
    'description' : 'My description'
    'root'        : 'node-id-1'
    'nodes'       : {
        'node-id-1' : {
            'name'        : 'Priority',
            'title'       : 'Root Node', 
            'description' : 'Description', 
            'children'    : ['node-id-2', 'node-id-3'], 
        },
        ...
    }
})

Using Behavior Trees

Usually, you want to define a target object to be controlled by the behavior tree. This target object can be anything: a function, an object, a string, a DOM element; this depends on your application.

You will also need to create a blackboard object (the memory), usually one for each target.

With the target and the blackboard objects. You just need to "tick" the tree and the magic will happen:

var target = new Image(); // The target will be an Image element
var blackboard = new b3.Blackboard();

tree.tick(target, blackboard);