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HTML

            
              <header class="header p-4 fixed-top">
  <h1 class="mb-0 small text-uppercase text-white space-3">First Try with ThreeJS</h1>
  <p class="small text-white-50">Inspired by <a href="https://dribbble.com/shots/5774627-New-Year-Illuminations" class="text-white">Nathan Riley</a> amazing shot </p>
</header>
!

JS

            
              THREE.Cache.enabled = true;

// Id generator
const guid = () => {
    const s4 = () => {
        return Math.floor((1 + Math.random()) * 0x10000)
            .toString(16)
            .substring(1);
    }
    return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
}

// The Scene class.
class Scene {
    constructor() {

        // Window sizes
        this.width = window.innerWidth;
        this.height = window.innerHeight;

        // Lights
        this.lights = [];
        this.lightMass = 0.1;

        // Text
        this.text = {
            string: "HappyNewYear",
            params: {
                height: 15,
                size: 30,
                hover: 0,
                curveSegments: 1,
                bevelThickness: 0.4,
                bevelSize: 0.25,
                bevelEnabled: true,
                font: undefined
            }
        };

        // Clock
        this.timeStep = 1 / 60;
        this.startDate = new Date().getTime();
        this.now = this.startDate;

        // Click things
        this.mouse = new THREE.Vector2();
        this.clickWall = undefined;
        this.clickables = [];

        this.raycaster = new THREE.Raycaster();

        this.init();
    }

    init() {

        this.createScene();

        this.createCamera();

        this.addFloor();

        this.addClickWall();
      
        this.addBox();

        this.animate();

        window.addEventListener('resize', this.onResize.bind(this));

        window.addEventListener('mouseup', this.onMouseUp.bind(this), false);

        this.onMouseUp({ clientX: 0, clientY: 0 });
    }

    // Create the scene, his world and renderer
    createScene() {
        // Scene
        this.scene = new THREE.Scene();
        this.scene.background = new THREE.Color(0x000000);

        // World
        this.world = new CANNON.World();
        this.world.gravity.set(0, 9.82, 0);
        this.world.broadphase = new CANNON.NaiveBroadphase();

        // Renderer
        this.renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
        this.renderer.setSize(window.innerWidth, window.innerHeight);
        this.renderer.setPixelRatio(window.devicePixelRatio);
        this.renderer.shadowMap.enabled = true;
        this.renderer.shadowMap.type = THREE.PCFSoftShadowMap;

        document.body.appendChild(this.renderer.domElement);
    }

    // Create the camera
    createCamera() {
        this.camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1);
        this.camera.position.set(0, 0, 75);
        this.camera.rotation.z = Math.PI;

        this.scene.add(this.camera);
    }

    // Add the floor plane
    addFloor() {
        const shape = new CANNON.Plane();
        let body = new CANNON.Body({ mass: 0, shape: shape });
        body.position = new CANNON.Vec3(0, 25, 0);
        body.quaternion.setFromEuler(Math.PI / 2, 0, 0);
        this.world.add(body);

        const geometry = new THREE.PlaneGeometry(200, 200, 1);
        const material = new THREE.MeshPhongMaterial({
            color: 0x38342c,
            specular: 0x111111,
            shininess: 30,
            flatShading: true
        });

        this.floor = new THREE.Mesh(geometry, material);
        this.floor.position.y = 25;
        this.floor.receiveShadow = true;
        this.floor.rotation.x = Math.PI * .5

        this.scene.add(this.floor);
    }

    // Add another plane to control clicks 
    addClickWall() {

        const geometry = new THREE.PlaneGeometry(200, 100, 1);
        const material = new THREE.MeshBasicMaterial({
            color: 0x666666,
            visible: false,
            alphaTest: false
        });

        this.clickWall = new THREE.Mesh(geometry, material);
        this.clickWall.position.z = 5;
        this.clickables.push(this.clickWall);

        this.scene.add(this.clickWall);
    }
  
    addBox() {
      const shape = new CANNON.Box(new CANNON.Vec3(50, 10, 7.5));
      const body = new CANNON.Body({ mass: 0, shape: shape });
      
      this.world.add(body);

      const geometry = new THREE.BoxGeometry(100, 20, 15);
      const material = new THREE.MeshPhongMaterial({ color: 0x38342c, flatShading: true });
      this.box = new THREE.Mesh(geometry, material);

      this.scene.add(this.box);
    }

    onMouseUp({ clientX, clientY }) {
        
        // Get current mouse position
        this.mouse.x = (clientX / window.innerWidth) * 2 - 1;
        this.mouse.y = -(clientY / window.innerHeight) * 2 + 1;

        this.raycaster.setFromCamera(this.mouse, this.camera);

        const intersects = this.raycaster.intersectObjects(this.clickables);
        const p = intersects.length > 0 ? intersects[0].point : new THREE.Vector3(0, 0, 0);

        // Create lights from current mouse position
        new Light({
            lights: this.lights,
            scene: this.scene,
            world: this.world,
            now: this.now,
            startPosition: { x: p.x, y: p.y, z: 7.5 + Math.random() },
            frozen: false
        })
        new Light({
            lights: this.lights,
            scene: this.scene,
            world: this.world,
            now: this.now,
            startPosition: { x: p.x - 2, y: p.y - 4, z: Math.random() },
            frozen: false
        })
        new Light({
            lights: this.lights,
            scene: this.scene,
            world: this.world,
            now: this.now,
            startPosition: { x: p.x - 10, y: p.y + 5, z: Math.random() },
            frozen: false
        })
        new Light({
            lights: this.lights,
            scene: this.scene,
            world: this.world,
            now: this.now,
            startPosition: { x: p.x + 7, y: p.y - 5, z: Math.random() },
            frozen: false
        })
    }

    onResize() {
        this.width = window.innerWidth;
        this.height = window.innerHeight;

        this.camera.aspect = this.width / this.height;
        this.camera.updateProjectionMatrix();
        this.renderer.setSize(this.width, this.height);
    }

    animate() {

        this.now = new Date().getTime();
        this.world.step(this.timeStep);

        this.lights.map(light => {
            if (light) light.update()
        });

        this.renderer.render(this.scene, this.camera);

        requestAnimationFrame(this.animate.bind(this));
    }

}

// The Light class.
class Light {
    constructor({ lights, scene, world, now, startPosition, frozen }) {
        this.scene = scene;
        this.world = world;
        this.createdDate = now;
        this.flickerDate = now + 8 * 1000;
        this.expireDate = this.flickerDate + 1 * 1000;
        this.frozen = frozen ? frozen : false;
        this.startPosition = startPosition ? startPosition : { x: 0, y: 0, z: 0 };

        this.mesh = undefined;
        this.mass = 10;
        this.radius = 1.5;

        this.lights = lights;

        this.constructPhysics();
        this.constructBulb();

        this.lights.push(this);
    }

    constructPhysics() {
        let { world, mass, radius, startPosition } = this, { x, y, z } = startPosition,
        sphereShape = new CANNON.Sphere(radius),
            sphereBody = new CANNON.Body({ mass: mass, shape: sphereShape })

        sphereBody.addShape(sphereShape);

        sphereBody.position = new CANNON.Vec3(x, y, z)
        this.physicsBody = sphereBody
        world.add(sphereBody)

        // const position = this.startPosition;

        // const shape = new CANNON.Sphere(this.radius);
        // const body = new CANNON.Body({ mass: this.mass, shape: shape });

        // body.position = new CANNON.Vec3(position.x, position.y, position.z);
        // this.world.add(this.body);

    }

    constructBulb() {
        let bulb = new THREE.Object3D();

        let { scene, radius, startPosition } = this, { x, y, z } = startPosition;

        // Create spheric bulb
        let bulbGeometry = new THREE.SphereBufferGeometry(radius, 30, 30);
        // let bulbBasicMaterial = new THREE.MeshBasicMaterial({ color: 0xffffff });
        let bulbPhongMaterial = new THREE.MeshPhongMaterial({
            color: 0xfffe5b,
            emissive: 0xffffe7,
            specular: 0x111111,
            shininess: 30,
        });
        let bulbMesh = new THREE.Mesh(bulbGeometry, bulbPhongMaterial);

        // Glow
        let bulbMap = new THREE.TextureLoader().load('https://crossorigin.me/https://www.alexandrebuffet.fr/codepen/images/textures/glow.png');
        let bulbSpriteMat = new THREE.SpriteMaterial({
            map: bulbMap,
            color: 0x9e721a,
            transparent: true,
            blending: THREE.AdditiveBlending
        });
        let bulbSprite = new THREE.Sprite(bulbSpriteMat);
        bulbSprite.scale.set(6, 6, 1.0);
        bulbMesh.add(bulbSprite);

        let light1 = new THREE.PointLight(0xfec87c, 1, 50, 2)
        let light2 = new THREE.PointLight(0xfec87c, 7, 25, 2)

        this.light1 = light1;
        this.light2 = light2;
        this.sphere = bulbMesh;

        light1.position.set(0, 0, 0)
        light2.position.set(0, 0, 0)

        bulbMesh.position.set(0, 0, 0)
        bulb.add(bulbMesh)
        bulb.add(light1)
        bulb.add(light2)

        bulb.position.x = x
        bulb.position.y = y
        bulb.position.z = z

        this.mesh = bulb

        light1.name = guid();
        light2.name = guid();
        bulbMesh.name = guid();

        scene.add(bulb)
    }

    update() {
        let { mesh, physicsBody, frozen } = this

        if (!frozen) {
            mesh.position.copy(physicsBody.position);
            mesh.quaternion.copy(physicsBody.quaternion);
        }
    }
}

new Scene();
!
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