I am using behaviro3js in node.js, and it works, except that I have to declare an empty b3 object in the global scope first.

This works:

b3 = {}
var behavior3js = require('behavior3js');

However, if I just do this:

var behavior3js = require('behavior3js');

without the "b3" declaration I receive this error:

_filename, __dirname) { this.b3=this.b3||{},function(){"use strict";b3.VERSION
                                                                    ^
ReferenceError: b3 is not defined

What about a node type (I guess this would be a decorator) that detects if it was interrupted (i.e., not executed in two successive evaluations of the tree in a row) and then calls some kind of "resume" function that can be overwritten by children?

Example where this could be useful: In my game an entity walks along a path towards some goal, all of which is implemented in one sub tree in the behavior tree. But along the way, an enemy might come into sight and the entity might decide to fight that enemy instead of following the path, which is implemented in another sub-tree. When the enemy is dead, the entity wants to return to the path, which requires some re-pathing now (since walking towards the enemy might have made the current path un-optimal). This could happen in the "resume" function.

Currently I would have to implement this by checking (every time the tree is processed), if the entity is still on the current path (by checking if the entity is still inside the current polygon of the nav mesh) or if it has diverged from it too much. This is wasted performance.

Also note that this is just one example. I actually think there will be many more concrete cases where I could use this type of decorator in the library.

About implementation: Every time the tree is processed, you could increment some hidden counter variable after each evaluation of the behavior tree. A node has been executing continuously and uninterrupted if the counter c_n is equal to c_(n-1)+1 when the node is executing, and has been interrupted if c is something else.

edit: By the way, great library and great editor. Easy to use and extend.

Great work!
Seems that the bower install command is missing in the building section. Otherwise, the application gets stuck on the Starting Application...Have Fun! phase.

Seems like the project is not deployed to npm... that would make it easier to adopt in other projects

JavaScript has moved on and so should this awesome codebase.

I plan to use this fork ( https://github.com/yagl/behavior3 ) for my project because it uses ES2015 and a Babel workflow, it's a pity I can't use the original version of the library 😉

In the original branch, the add custom node function existed, but now it is gone

Line 19 of the bower.json file has a trailing comma, which I believe is causing problems when trying to retrieve the framework using bower.

Could you please write a simple implementation example ? For example an agent behavior that roam randomly and eat when it's hungry ?

I'm very interested in learning and implementing tree behavior in js but must say I don't clearly see how to implement it in a basic architecture.

Thanks :)

Hello,

Javascript classes have been released in June 2015 under the EcmaScript 6 specification. It would be great if behavior3js use them instead of its own class utility.

To ensure compatibility with browsers, we'll need to use something like babel to transpile ES6 to ES5.

This change will be heavy, but since there is a test suit we can do it without breaking features.

@renatopp: From everything I've read about behavior trees, probably the main logic node is the Selector. But in this library I don't see such class. Is it called something else? I'm new to this, sorry if this is a stupid question.
In the linked paper it is stated as well and I thought the library is supposed to be consistent with it.

Anyway, thank you for a great library. I'm gonna try to build something great with it. :)

The site for the editor/demo isn't working anymore

Need examples to know how to use

the tree is as below

and i do enter the limiter but when i tick the tree in the update again the time of the limiter would reset to zero again.

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The zoom short cut seems to be reversed in chrome and firefox. ctrl + scroll up and ctrl + scroll down work fine in chrome but have the opposite effect in firefox

https://www.npmjs.com/package/behavior3js

Also I think it is confusing that you still use your old site It is my first google result:

http://behavior3js.guineashots.com/

Please refer to behavior3/behavior3editor#18

Hi,

Thanks so much for a VERY comprehensive library. It's a work of art. We like it a lot.

i wonder if there's a bug in MemSequence, when it uses the open() method to reset the 'runningChild' index.

consider a MemSequence with 3 actions children.

1. action1 starts, return RUNNING for a few ticks
2. MemSequence is opened (stored at the open node list)
3. action1 ends, return SUCCESS.
4. MemSequence is closed
5. action2 starts, return RUNNING
6. MemSequence is opened
7. runningChild is reset to 0!

if thats indeed a bug, i wondered where and when runningChild should be reset? is it a functional decision, based on some other parameters, or should it reset always when it reaches the end of the sequence?

also, what is the use for the openNode list?

thank you for any idea
Lior

hi!
how can I nest trees made with the editor?

for example like explained here:
http://aigamedev.com/open/tutorial/design-consistent-behaviors/#ASimpleMethodology
sleep bt uses move bt

how can that be implemented with behaviour3js

e.g. An action node that gets a tree instance from a factory?

I have no Idea where to start.

Sorry for asking this stupid basic stuff.

thanks

when to support parallel container?

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this is my wish list for behavior3:

behavior3js:

• second generation bt (event-driven)
• subtree support

behavior3editor:

• hierarchical nodes
• subtree support
• display title in the nodes (just a symbol is a bit uninformative)
• comment area (coloured rectangle with nodes "inside")

Title says it all - How can I load a tree from the Editor to use with the lib?

The gulp build task does not explicitly specify the order of inclusion of the main classes (BaseNode, etc), when concatenating. The result may have the child classes defined first before the parent classes which results in them inheriting from "null" when calls b3.Class(...)

The gulp build task does not explicitly specify the order of inclusion of the main classes (BaseNode, etc), when concatenating. The result may have the child classes defined first before the parent classes which results in them inheriting from "null" when calls b3.Class(...)

This fix just specifies the scripts in the correct order when building.

npm install behavior3js is pulling version 0.1.0 from https://github.com/renatopp/behavior3js instead of the current version from https://github.com/behavior3/behavior3js

EDIT: I just tried the new version and it breaks in node.js, so maybe it is best that npm points to the old version until use of behavior3js in node.js is sorted out fully.

Hi, is it still maintained? It's a little bit outdated and needs some work.

When I define parallel nodes, tick._openNodes and lastOpenNodes have some problems
(my english is poor)

var start = 0;
var i;
for (i = 0; i < Math.min(lastOpenNodes.length, currOpenNodes.length); i++) {
  start = i + 1;
  if (lastOpenNodes[i] !== currOpenNodes[i]) {
    break;
  }
}

There are problems with this comparison

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