PlanetrackerScript_boombox_forWorldtemplateTesting.js

//// I adapted this very slightly from the sparkar docs to use with world template as is https://sparkar.facebook.com/ar-studio/learn/tutorials/scripting?utm_campaign=welcome_screen_learn_more&utm_medium=learn&utm_offering=spark-ar&utm_product=spark-ar&utm_source=product#scaling-the-boombox-with-pinch-gestures
const Scene = require('Scene');
const TouchGestures = require('TouchGestures');

const sceneRoot = Scene.root;

Promise.all([
  sceneRoot.findFirst('planeTracker0'),
  sceneRoot.findFirst('dragHere')
])
  .then(function (objects) {
    const planeTracker = objects[0];
    const placer = objects[1];

    TouchGestures.onPan().subscribe(function (gesture) {
      planeTracker.trackPoint(gesture.location, gesture.state);
    });

    const placerTransform = placer.transform;

    TouchGestures.onPinch().subscribeWithSnapshot({
      'lastScaleX': placerTransform.scaleX,
      'lastScaleY': placerTransform.scaleY,
      'lastScaleZ': placerTransform.scaleZ
    }, function (gesture, snapshot) {
      placerTransform.scaleX = gesture.scale.mul(snapshot.lastScaleX);
      placerTransform.scaleY = gesture.scale.mul(snapshot.lastScaleY);
      placerTransform.scaleZ = gesture.scale.mul(snapshot.lastScaleZ);
    });

    TouchGestures.onRotate().subscribeWithSnapshot({
      'lastRotationY': placerTransform.rotationY,
    }, function (gesture, snapshot) {
      const correctRotation = gesture.rotation.mul(-1);
      placerTransform.rotationY = correctRotation.add(snapshot.lastRotationY);
    });
  });