Getting Started with Three.js in React

Setting up the Scene

First, you need a scene, a camera, and a renderer.

import * as THREE from 'three';

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer();

renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

Adding a Cube

Let's add a simple cube to our scene.

const geometry = new THREE.BoxGeometry(1, 1, 1);
const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
const cube = new THREE.Mesh(geometry, material);
scene.add(cube);

camera.position.z = 5;

Animation Loop

To animate the cube, we need a render loop.

function animate() {
	requestAnimationFrame(animate);

	cube.rotation.x += 0.01;
	cube.rotation.y += 0.01;

	renderer.render(scene, camera);
}
animate();

This is just the beginning. Three.js offers a vast API for creating complex 3D experiences on the web.