shakiba

    // emscripten
    var bd_ground = new Box2D.b2BodyDef();
    var ground = world.CreateBody(bd_ground);
    var shape0 = new Box2D.b2EdgeShape();
    shape0.Set(new Box2D.b2Vec2(-40.0, -6.0), new Box2D.b2Vec2(40.0, -6.0));
    ground.CreateFixture(shape0, 0.0);    

    // planck.js
    var ground = world.createBody({});
    ground.createFixture(planck.Edge(Vec2(-40.0, -6.0), Vec2(40.0, -6.0)), 0.0);

    // emscripten
    var bd = new Box2D.b2BodyDef();
    bd.set_type(Box2D.b2_dynamicBody);
    bd.set_position(ZERO);
    var body = world.CreateBody(bd);

    // planck.js
    var body = world.createBody({
      type: "dynamic",
      position: Vec2(0, 0),
    });
    // or just world.createDynamicBody();

    // emscripten    
    myQueryCallback = new Box2D.JSQueryCallback();
    myQueryCallback.ReportFixture = function(fixturePtr) { };

    // planck.js
    myQueryCallback = function(fixture) { };