Three.js - AmbientLight 环境光
它是最基本的光，可以均匀照亮整个场景。光线均匀地分布在所有方向和距离上，因此不会投射阴影。环境光会均匀地影响场景中的所有发光物体，并为物体的材质添加颜色。
const light = THREE.AmbientLight(color, intense)
示例
使用以下示例中的代码，使用不同的颜色和强度进行尝试。
ambient.html
<!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" />
<title>Three.js - AmbientLight</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: -applesystem, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}
html,
body {
height: 100vh;
width: 100vw;
}
#threejs-container {
position: block;
width: 100%;
height: 100%;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.7.7/dat.gui.js"></script>
</head>
<body>
<div id="container"></div>
<script type="module">
// 将环境光添加到场景中
// 如果没有此光，您将无法看到立方体的颜色
// GUI
const gui = new dat.GUI()
// 尺寸
let width = window.innerWidth
let height = window.innerHeight
// 场景
const scene = new THREE.Scene()
scene.background = new THREE.Color(0x262626)
// 相机
const camera = new THREE.PerspectiveCamera(45, width / height, 0.1, 100)
camera.position.set(0, 0, 10)
// lights
const light = new THREE.AmbientLight(0xffffff, 1)
scene.add(light)
// 灯光控制
const lightColor = {
color: light.color.getHex()
}
const lightFolder = gui.addFolder('Ambient Light')
lightFolder.addColor(lightColor, 'color').onChange(() => {
light.color.set(lightColor.color)
})
lightFolder.add(light, 'intensity', 0, 1, 0.01)
lightFolder.open()
// cube
const geometry = new THREE.BoxGeometry(2, 2, 2)
const material = new THREE.MeshStandardMaterial({
color: 0xffffff,
wireframe: true
})
const materialFolder = gui.addFolder('Material')
materialFolder.add(material, 'wireframe')
materialFolder.open()
const cube = new THREE.Mesh(geometry, material)
scene.add(cube)
// 响应性
window.addEventListener('resize', () => {
width = window.innerWidth
height = window.innerHeight
camera.aspect = width / height
camera.updateProjectionMatrix()
renderer.setSize(window.innerWidth, window.innerHeight)
renderer.render(scene, camera)
})
// 渲染器
const renderer = new THREE.WebGL1Renderer()
renderer.setSize(width, height)
renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2))
// 动画
function animate() {
requestAnimationFrame(animate)
cube.rotation.x += 0.005
cube.rotation.y += 0.01
renderer.render(scene, camera)
}
// 渲染场景
const container = document.querySelector('#container')
container.append(renderer.domElement)
renderer.render(scene, camera)
animate()
</script>
</body>
</html>
输出
threejs_lights_and_shadows.html
