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@@ -28,7 +28,7 @@ class DemoUtils
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return gltf;
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}
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- createAnimationAction(gltf, name = null)
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+ createAnimationAction(gltf, name = null, loop = THREE.LoopRepeat)
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{
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const mixer = new THREE.AnimationMixer(gltf.scene);
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const clips = gltf.animations;
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@@ -43,6 +43,7 @@ class DemoUtils
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const clip = THREE.AnimationClip.findByName(clips, name);
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const action = mixer.clipAction(clip);
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+ action.loop = loop;
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return action;
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}
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@@ -66,7 +67,7 @@ class DemoUtils
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ar.root.rotation.set(-Math.PI / 2, 0, 0);
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}
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- referenceImage(ar)
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+ referenceImageName(ar)
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{
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if(ar.frame === null)
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return null;
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@@ -75,23 +76,13 @@ class DemoUtils
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if(result.tracker.type == 'image-tracker') {
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if(result.trackables.length > 0) {
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const trackable = result.trackables[0];
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- return trackable.referenceImage;
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+ return trackable.referenceImage.name;
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}
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}
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}
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return null;
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}
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-
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- referenceImageName(ar)
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- {
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- const referenceImage = this.referenceImage(ar);
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-
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- if(referenceImage === null)
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- return null;
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-
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- return referenceImage.name;
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- }
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}
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@@ -126,10 +117,16 @@ class DemoScene extends ARScene
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}
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const tracker = AR.Tracker.ImageTracker();
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- await tracker.database.add([{
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- name: 'my-reference-image',
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- image: document.getElementById('my-reference-image')
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- }]);
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+ await tracker.database.add([
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+ {
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+ name: 'mage',
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+ image: document.getElementById('mage')
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+ },
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+ {
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+ name: 'cat',
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+ image: document.getElementById('cat')
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+ }
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+ ]);
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const viewport = AR.Viewport({
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container: document.getElementById('ar-viewport'),
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@@ -138,9 +135,7 @@ class DemoScene extends ARScene
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const video = document.getElementById('my-video');
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const useWebcam = (video === null);
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- const source = useWebcam ?
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- AR.Source.Camera({ resolution: 'md' }) :
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- AR.Source.Video(video);
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+ const source = useWebcam ? AR.Source.Camera() : AR.Source.Video(video);
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const session = await AR.startSession({
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mode: 'immersive',
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@@ -157,12 +152,16 @@ class DemoScene extends ARScene
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session.gizmos.visible = false;
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if(scan)
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scan.hidden = true;
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+
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+ this._onTargetFound(event.referenceImage);
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});
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tracker.addEventListener('targetlost', event => {
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session.gizmos.visible = true;
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if(scan)
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scan.hidden = false;
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+
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+ this._onTargetLost(event.referenceImage);
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});
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return session;
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@@ -180,56 +179,154 @@ class DemoScene extends ARScene
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// Adjusting ar.root will adjust all virtual objects.
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this._utils.switchToFrontView(ar);
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ar.root.position.set(0, -0.5, 0);
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- ar.root.scale.set(0.7, 0.7, 0.7);
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- // add light
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+ // initialize objects
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+ this._initLight(ar);
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+ this._initText(ar);
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+ this._initMagicCircle(ar);
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+
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+ await Promise.all([
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+ this._initMage(ar),
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+ this._initCat(ar),
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+ ]);
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+ }
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+
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+ /**
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+ * Update / animate the augmented scene
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+ * @param {ARSystem} ar
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+ * @returns {void}
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+ */
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+ update(ar)
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+ {
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+ const delta = ar.session.time.delta; // given in seconds
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+
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+ // animate the objects of the scene
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+ this._animateMagicCircle(delta);
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+ this._animateMage(delta);
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+ this._animateCat(delta);
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+ }
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+
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+
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+ // ------------------------------------------------------------------------
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+
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+
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+ _initLight(ar)
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+ {
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const ambientLight = new THREE.AmbientLight(0xffffff);
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ambientLight.intensity = 1.5;
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+
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ar.scene.add(ambientLight);
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+ }
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- // create the magic circle
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+ _initMagicCircle(ar)
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+ {
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+ // load the object
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const magicCircle = this._utils.createImagePlane('../assets/magic-circle.png');
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- magicCircle.material.color = new THREE.Color(0xbeefff);
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magicCircle.material.transparent = true;
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magicCircle.material.opacity = 1;
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- magicCircle.scale.set(6, 6, 1);
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+ magicCircle.scale.set(4, 4, 1);
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+
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+ // add the object to the scene
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ar.root.add(magicCircle);
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+ // save a reference
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+ this._objects.magicCircle = magicCircle;
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+ }
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+
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+ _initText(ar)
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+ {
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+ const text = this._utils.createImagePlane('../assets/it-works.png');
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+ text.material.transparent = true;
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+ text.material.opacity = 1;
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+ text.position.set(0, -0.5, 2);
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+ text.scale.set(3, 1.5, 1);
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+ text.rotateX(Math.PI / 2);
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+
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+ ar.root.add(text);
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+
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+ this._objects.text = text;
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+ }
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+
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+ async _initMage(ar)
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+ {
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// load the mage
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const gltf = await this._utils.loadGLTF('../assets/mage.glb');
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const mage = gltf.scene;
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- ar.root.add(mage);
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+ mage.scale.set(0.7, 0.7, 0.7);
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// prepare the animation of the mage
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- const animationAction = this._utils.createAnimationAction(gltf, 'Idle');
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- animationAction.loop = THREE.LoopRepeat;
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- animationAction.play();
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+ const mageAction = this._utils.createAnimationAction(gltf, 'Idle');
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+ mageAction.play();
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- // save objects
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+ // add the mage to the scene
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+ ar.root.add(mage);
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+
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+ // save references
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this._objects.mage = mage;
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- this._objects.magicCircle = magicCircle;
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- this._objects.animationAction = animationAction;
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+ this._objects.mageAction = mageAction;
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}
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- /**
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- * Update / animate the augmented scene
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- * @param {ARSystem} ar
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- * @returns {void}
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- */
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- update(ar)
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+ async _initCat(ar)
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{
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- const TWO_PI = 2.0 * Math.PI;
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- const ROTATIONS_PER_SECOND = 0.25;
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- const delta = ar.session.time.delta; // given in seconds
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+ const gltf = await this._utils.loadGLTF('../assets/cat.glb');
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+ const cat = gltf.scene;
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+ cat.scale.set(0.7, 0.7, 0.7);
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+
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+ const catAction = this._utils.createAnimationAction(gltf, 'Cheer');
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+ catAction.play();
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+
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+ ar.root.add(cat);
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+
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+ this._objects.cat = cat;
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+ this._objects.catAction = catAction;
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+ }
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- // animate the mage
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- const animationAction = this._objects.animationAction;
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- const mixer = animationAction.getMixer();
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+ _animate(action, delta)
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+ {
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+ const mixer = action.getMixer();
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mixer.update(delta);
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+ }
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+
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+ _animateMage(delta)
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+ {
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+ this._animate(this._objects.mageAction, delta);
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+ }
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- // animate the magic circle
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- const magicCircle = this._objects.magicCircle;
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- magicCircle.rotateZ(-TWO_PI * ROTATIONS_PER_SECOND * delta);
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+ _animateCat(delta)
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+ {
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+ this._animate(this._objects.catAction, delta);
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+ }
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+
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+ _animateMagicCircle(delta)
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+ {
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+ const TWO_PI = 2.0 * Math.PI;
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+ const ROTATIONS_PER_SECOND = 1.0 / 8.0;
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+
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+ this._objects.magicCircle.rotateZ(-TWO_PI * ROTATIONS_PER_SECOND * delta);
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+ }
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+
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+ _onTargetFound(referenceImage)
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+ {
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+ // change the scene based on the scanned image
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+ switch(referenceImage.name) {
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+ case 'mage':
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+ this._objects.mage.visible = true;
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+ this._objects.cat.visible = false;
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+ this._objects.text.visible = false;
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+ this._objects.magicCircle.material.color.set(0xbeefff);
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+ break;
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+
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+ case 'cat':
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+ this._objects.mage.visible = false;
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+ this._objects.cat.visible = true;
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+ this._objects.text.visible = true;
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+ this._objects.magicCircle.material.color.set(0xffffaa);
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+ break;
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+ }
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+ }
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+
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+ _onTargetLost(referenceImage)
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+ {
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}
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}
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