Nape InteractionListener not calling callback

[Nicolas Mansart]

Hello !

New in here, I'm beginning with haxeflixel and currently trying to set up an InteractionListener (like in there : http://napephys.com/help/manual.html#Callbacks.InteractionListeners ) to hear some collisions, but it does not seem to work.

Here is one of my tests, tried to keep it minimal : a dynamic FlxNapeSprite bouncing on a static one and a listener on them two. There is a FlxText which should show the bounce count, which should be updated in the listener callback.

What do you think is missing ?

package;
import flixel.addons.nape.FlxNapeSprite;
import flixel.addons.nape.FlxNapeState;
import flixel.FlxG;
import flixel.text.FlxText;
import flixel.util.FlxColor;
import nape.callbacks.CbEvent;
import nape.callbacks.CbType;
import nape.callbacks.InteractionCallback;
import nape.callbacks.InteractionListener;
import nape.callbacks.InteractionType;
import nape.phys.BodyType;

/**
 * test based on http://napephys.com/help/manual.html
 * @author ...
 */
class TestNapeCollide extends FlxNapeState
{

    private var _sprGround:FlxNapeSprite;
    private var _sprBox:FlxNapeSprite;
    private var _CBBOX:CbType;
    private var _CBGROUND:CbType;
    private var _boxGroundCollide:InteractionListener;
    private var _collisions:Int;
    private var _txtInfo:FlxText;
   
    override public function create():Void
    {
        super.create();
       
        napeDebugEnabled = true;
       
        _CBBOX = new CbType();
        _CBGROUND = new CbType();
       
        _collisions = 0;
        _txtInfo = new FlxText(10, 10, 0, "Collisions:" + _collisions);
        add(_txtInfo);
       
        _boxGroundCollide = new InteractionListener(CbEvent.BEGIN, InteractionType.COLLISION, _CBBOX, _CBGROUND, boxGroundCollide);
       
       
        _sprGround = new FlxNapeSprite(FlxG.width/2, FlxG.height - 40);
        _sprGround.makeGraphic(FlxG.width, 20, FlxColor.WHITE);
        _sprGround.createRectangularBody(0, 0, BodyType.STATIC);
        _sprGround.setBodyMaterial();
        add(_sprGround);
       
        _sprBox = new FlxNapeSprite(FlxG.width / 2, 40);
        _sprBox.makeGraphic(20, 20, FlxColor.BLUE);
        _sprBox.createRectangularBody(0, 0, BodyType.DYNAMIC);
        _sprBox.setBodyMaterial();
        add(_sprBox);
    }
   
    override public function update():Void
    {
        super.update();
        _txtInfo.text = "Collisions:" + _collisions;
       
        if (FlxG.mouse.justPressed && FlxNapeState.space.gravity.y == 0)
            FlxNapeState.space.gravity.setxy(0, 500);
       
        if (FlxG.keys.justPressed.G)
        {
            napeDebugEnabled = !napeDebugEnabled;
        }
    }
   
    // Collision callback function
    private function boxGroundCollide(ic:InteractionCallback):Void
    {
        trace("Collision");
        _collisions++;
    }
   
}

[Thomas Bernard]

My answer is probably late. But I think you miss to add your CbTypes to your FlxNapeSprites and to add your listener to your napespace:

_sprGround.body.cbTypes.add(_CBGROUND);
_sprBox.body.cbTypes.add(_CBBOX);

FlxNapeState.space.listeners.add(_boxGroundCollide);

[Nicolas Mansart]

Late indeed (I ended up not using nape, which was quite tricky but worked somehow), but it may be useful later, it works, thank you :)