[英]three.js: Casting SpotLight Shadows
全部。
我正在使用 three.js 127,按照文档添加SpotLight 。 但是,阴影不会出现在场景中。 下面,你可以找到我的场景。 我已经将平面设置为接收阴影以及启用投射阴影的其他元素,但场景上没有渲染阴影。
const canvas = document.getElementById('webgl-output')
const init = () => {
const scene = new THREE.Scene()
const camera = new THREE.PerspectiveCamera(
45,
window.innerWidth / window.innerHeight,
0.1,
1000,
)
const renderer = new THREE.WebGLRenderer({
canvas,
})
renderer.setClearColor(new THREE.Color(0x000000))
renderer.setSize(window.innerWidth, window.innerHeight)
const planeGeometry = new THREE.PlaneGeometry(60, 20)
const planeMaterial = new THREE.MeshLambertMaterial({
color: 0xaaaaaa,
})
const plane = new THREE.Mesh(planeGeometry, planeMaterial)
plane.receiveShadow = true
plane.rotation.x = -0.5 * Math.PI
plane.position.x = 15
plane.position.y = 0
plane.position.z = 0
scene.add(plane)
// Creating a cube
const cubeGeometry = new THREE.BoxGeometry(4, 4, 4)
const cubeMaterial = new THREE.MeshLambertMaterial({
color: 0xff0000,
})
const cube = new THREE.Mesh(cubeGeometry, cubeMaterial)
cube.castShadow = true
cube.position.x = -4
cube.position.y = 3
cube.position.z = 0
scene.add(cube)
// Creating a sphere
const sphereGeometry = new THREE.SphereGeometry(4, 20, 20)
const sphereMaterial = new THREE.MeshLambertMaterial({
color: 0x7777ff,
})
const sphere = new THREE.Mesh(sphereGeometry, sphereMaterial)
sphere.castShadow = true
sphere.position.x = 20
sphere.position.y = 4
sphere.position.z = 2
scene.add(sphere)
// Position and point the camera to the center of the scene
camera.position.x = -30
camera.position.y = 12
camera.position.z = 30
camera.lookAt(scene.position)
// Add spotlight for the shadows
const spotLight = new THREE.SpotLight(0xffffff)
spotLight.position.set(8, 40, 80)
spotLight.castShadow = true
spotLight.shadow.mapSize.width = 1024
spotLight.shadow.mapSize.height = 1024
spotLight.shadow.camera.near = 8
spotLight.shadow.camera.far = 80
spotLight.shadow.camera.fov = 16
scene.add(spotLight)
renderer.render(scene, camera)
}
init()
我错过了一些东西来渲染阴影吗?
我从您的代码中注意到一些可能导致此问题的内容:
renderer.shadowMap.enabled = true;
这部分似乎没有出现在您链接的 SpotLight 的文档中,有关此的更多信息可以在SpotLightShadow的文档中找到。
import { OrbitControls } from 'https://cdn.jsdelivr.net/npm/three@0.127/examples/jsm/controls/OrbitControls.js';
...
spotLight.position.set(8, 40, 40); // Third parameter (z) with value of 80 was too far away
controls = new OrbitControls(camera, renderer.domElement);
helper = new THREE.PointLightHelper(pointLight);
scene.add(helper);
这是固定版本的JSFiddle:https://jsfiddle.net/tombugolya/hx61L5vp/17/
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