How to rotate a gltf model

Questions
, ,
1

Hi Guys,
I am new in three.js and i’am trying to animate one of the children inside my gltf (ring) i’m just wanna to rotate in the x axis just like the sphere behind but i can’t get it to work i hope you can help me please

    <!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        * {
            margin: 0;
            padding: 0;
            border: none;
            overflow-x: hidden;
        }
    </style>
    <title>Logo Test</title>

</head>

<body>
    <canvas class="webgl"></canvas>


    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.js"
        integrity="sha512-NLtnLBS9Q2w7GKK9rKxdtgL7rA7CAS85uC/0xd9im4J/yOL4F9ZVlv634NAM7run8hz3wI2GabaA6vv8vJtHiQ=="
        crossorigin="anonymous" referrerpolicy="no-referrer"></script>
    <script src="https://82mou.github.io/threejs/js/OrbitControls.js"></script>
    <script src="https://cdn.jsdelivr.net/gh/mrdoob/three.js@r92/examples/js/loaders/GLTFLoader.js"></script>


    <script>

        // Canvas
        const canvas = document.querySelector('canvas.webgl')

        // Scene
        const scene = new THREE.Scene()
        const geometry1 = new THREE.IcosahedronGeometry(0.3, 1,);
        var obj;
        // Objects
        const material = new THREE.MeshStandardMaterial({
            flatShading: true,
        })
        material.color = new THREE.Color(0xFFFFFF)
        material.metalness = 0.7
        material.roughness = 1


        //Mesh
        const sphere = new THREE.Mesh(geometry1, material)
        sphere.position.x = 0;
        sphere.scale.set(3, 3, 3)
        sphere.position.y = 0;
        sphere.position.z = -1.3;
        scene.add(sphere)
    
        const loader = new THREE.GLTFLoader();
        loader.load('https://uploads-ssl.webflow.com/6061f5bfe4da464153703a20/61483d302c2017c3a89b6725_gym_final.gltf.txt', function (gltf) {
            console.log(gltf.scene.children[0].name)
            gltf.scene.scale.set(0.5, 0.5, 0.5)
            gltf.scene.position.set(0, 0, 0)
            gltf.scene.rotation.set(0, 0, 0)
    

            scene.add(gltf.scene);
        });

        //Frontlight
        const pointLight1 = new THREE.PointLight(0xff0015, 1)
        pointLight1.position.set(0, 0, 2)
        scene.add(pointLight1)

        //Rightlight
        const pointLight2 = new THREE.PointLight(0xff0015, 0.5)
        pointLight2.position.set(2, 0, 0)
        scene.add(pointLight2)

        //Backlight
        const pointLight3 = new THREE.PointLight(0x4A6CFE, 0.5)
        pointLight3.position.set(0, 0, -1)
        //pointLight3.intensity = 0.5
        scene.add(pointLight3)

        //Leftlight
        const pointLight4 = new THREE.PointLight(0xFFFFFF, 0.5)
        pointLight4.position.set(-2, 0, 0)
        scene.add(pointLight4)

        const ambientLight = new THREE.AmbientLight(0xffffff, 1.3);
        scene.add(ambientLight);

        //Sizes
        const sizes = {
            width: window.innerWidth,
            height: window.innerHeight
        }

        window.addEventListener('resize', () => {
            // Update sizes
            sizes.width = window.innerWidth
            sizes.height = window.innerHeight

            // Update camera
            camera.aspect = sizes.width / sizes.height
            camera.updateProjectionMatrix()

            // Update renderer
            renderer.setSize(sizes.width, sizes.height)
            renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2))
        })

        // Base camera
        const camera = new THREE.PerspectiveCamera(50, sizes.width / sizes.height, 0.1, 100)
        camera.position.x = 0
        camera.position.y = 0
        camera.position.z = 2.6

        scene.add(camera)

        // Controls
        const controls = new THREE.OrbitControls(camera, canvas)
        controls.enableDamping = true
        controls.screenSpacePaning = false;
        controls.minDistance = 0.2;
        controls.maxDistance = 1.9;
        controls.maxPolarAngle = Math.PI / 2;

        //Renderer
        const renderer = new THREE.WebGLRenderer({
            canvas: canvas,
            alpha: true,
            antialias: true
        })

        renderer.setSize(sizes.width, sizes.height)
        renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2))



        const windowX = window.innerWidth / 2;
        const windowY = window.innerHeight / 2;


        const clock = new THREE.Clock()

        const tick = () => {


            const elapsedTime = clock.getElapsedTime()

            // Update Orbital Controls
            controls.update()

            // Update objects
            sphere.rotation.x -= 0.006;

            //gltf.scene.children[0].rotation.x -= 0.006
    
            
            // Render
            renderer.render(scene, camera)

            // Call tick again on the next frames
            window.requestAnimationFrame(tick)

            camera.lookAt(scene.position);
        }
        tick()


    </script>
</body>
2

gltf variable is in functional scope, so you can not target it direction is update function.
create a variable outside of your gltf loader in global space and after loading the gltf, pass the gltf to that variable and target global gltf variable inside update function

let globalGltf;
loader,.load(url, function(gltf) => {
globalGltf.= gltf
scene.add(globalGltf)
})

const update = () => {
if(globalGltf){
//rotate global gltf model here
}
}