three

Creating a Scene

This code sample demonstrates how to create a new 3D scene using Three.js. A scene is a container that holds all your objects, cameras, and lights.

const scene = new THREE.Scene();

Adding a Mesh

This code sample shows how to create a simple cube mesh with a green color and add it to the scene. A mesh consists of a geometry and a material.

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);

Setting up a Camera

This code sets up a perspective camera with a certain field of view, aspect ratio, and near and far clipping planes. The camera is positioned 5 units away from the origin along the z-axis.

const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.z = 5;

Rendering the Scene

This code sample initializes a WebGL renderer, sets its size, and appends its DOM element to the body of the document. It also defines an animate function that continuously renders the scene using the camera.

const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
function animate() {
  requestAnimationFrame(animate);
  renderer.render(scene, camera);
}
animate();

Adding Lights

This code sample adds a point light to the scene, which emits light in all directions. The light's color, intensity, and distance are set, and its position is placed at coordinates (10, 10, 10).

const light = new THREE.PointLight(0xffffff, 1, 100);
light.position.set(10, 10, 10);
scene.add(light);