ThreeJS组件在VueJS 2中工作，但在3中不工作
我正在将我的应用程序升级到VueJS 3。我读到你可以保留相同的组件。但我现在在控制台中有一个错误，尽管我没有更改任何东西。以下是我的组件：
<template>
<v-container>
<div
@click="onClick"
@mousemove="onMouseMove"
id="menu3D"
style="background-color: transparent; position: fixed; left: 20px; width:15%; height:100%;">
</div>
<v-row class="text-center">
<v-col
class="mb-5"
cols="12"
>
<h2 class="headline font-weight-bold mb-3">
Accueil
</h2>
<v-row justify="center">
<p>
Client: {{ JSON.stringify(client)}}
</p>
<p>
Mouse: {{ JSON.stringify(mouse)}}
</p>
<p>
Container: {{ JSON.stringify(container)}}
</p>
</v-row>
</v-col>
</v-row>
</v-container>
</template>
<script>
import * as Three from 'three';
export default {
name: 'Accueil',
mounted() {
this.init();
},
methods: {
init() {
this.createScene();
this.createCamera();
this.userData.formes.forEach((x) => this.createShape(x));
this.addSpotlight(16777215);
this.addAmbientLight();
this.animate();
window.addEventListener('resize', this.onResize);
},
onResize() {
const container = document.getElementById('menu3D');
this.renderer.setSize(container.clientWidth, container.clientHeight);
this.camera.aspect = container.clientWidth / container.clientHeight;
this.camera.updateProjectionMatrix();
},
createScene() {
this.renderer = new Three.WebGLRenderer({
antialias: true,
alpha: true,
});
const container = document.getElementById('menu3D');
this.renderer.setSize(container.clientWidth, container.clientHeight);
this.renderer.setPixelRatio(window.devicePixelRatio);
this.renderer.setClearColor(0xffffff, 0);
container.appendChild(this.renderer.domElement);
},
createCamera() {
const container = document.getElementById('menu3D');
this.camera = new Three.PerspectiveCamera(50,
container.clientWidth / container.clientHeight, 0.01, 1000);
this.camera.position.set(0, 5, 20);
this.camera.zoom = 1;
},
createShape(shape) {
const material = new Three.MeshStandardMaterial({
color: '#0000ff',
roughness: 1,
metalness: 0.5,
emissive: 0,
depthFunc: 3,
depthTest: true,
depthWrite: true,
stencilWrite: false,
stencilWriteMask: 255,
stencilFunc: 519,
stencilRef: 0,
stencilFuncMask: 255,
stencilFail: 7680,
stencilZFail: 7680,
stencilZPass: 7680,
});
switch (shape.nom) {
case 'Box': {
this.geometry = new Three.BoxBufferGeometry(1.8, 1.8, 1.8);
break;
}
case 'Sphere': {
this.geometry = new Three.SphereBufferGeometry(1, 8, 6, 0, 6.283185, 0, 3.141593);
break;
}
case 'Dodecahedron': {
this.geometry = new Three.DodecahedronBufferGeometry(1.2, 0);
break;
}
case 'Icosahedron': {
this.geometry = new Three.IcosahedronBufferGeometry(1.5, 0);
break;
}
default: {
return false;
}
}
this.mesh = new Three.Mesh(this.geometry, material);
this.mesh.name = shape.nom;
this.mesh.userData = shape.userData;
this.mesh.receiveShadow = true;
this.mesh.castShadow = true;
this.mesh.position.set(0, shape.userData.position.y, 0);
this.scene.add(this.mesh);
return true;
},
addSpotlight(color) {
const light = new Three.SpotLight(color, 2, 1000);
light.position.set(0, 0, 30);
this.scene.add(light);
},
addAmbientLight() {
const light = new Three.AmbientLight('#fff', 0.5);
this.scene.add(light);
},
verifForme(e) {
const t = this;
const elt = t.scene.getObjectByName(e);
t.intersects = t.raycaster.intersectObject(elt);
if (t.intersects.length !== 0) {
// s'il ne figure pas dans le tableau, on le met en premier
if (t.userData.souris.indexOf(e) < 0) {
t.userData.souris.unshift(e);
console.log(`${t.userData.souris[0]} survolé!`);
}
if (t.userData.souris[0] === e) {
const obj = t.intersects[0].object;
obj.material.color.set(`#${elt.userData.couleurs[1]}`);
obj.scale.set(obj.scale.x < 1.4
? obj.scale.x + t.VITESSE_ZOOM
: obj.scale.x, obj.scale.y < 1.4
? obj.scale.y + t.VITESSE_ZOOM
: obj.scale.y, obj.scale.z < 1.4
? obj.scale.z + t.VITESSE_ZOOM
: obj.scale.z);
obj.rotation.y += t.VITESSE_ROTATION / t.RALENTISSEMENT;
t.replacer(obj, obj.userData.position.y + obj.userData.decalage);
} else {
t.retrecir(e, elt);
}
} else {
if (t.userData.souris.indexOf(e) >= 0) {
t.userData.souris = t.userData.souris.filter((forme) => forme !== e);
}
t.retrecir(e, elt);
}
},
onClick(event) {
event.preventDefault();
if (this.userData.souris.length > 0) {
console.log(`${this.userData.souris[0]} cliqué!`);
} else {
console.log('clic dans le vide!');
}
},
onMouseMove(event) {
const container = document.getElementById('menu3D');
this.mouse.x = (event.offsetX / container.clientWidth) * 2 - 1;
this.mouse.y = -(event.offsetY / container.clientHeight) * 2 + 1;
this.client.clientX = event.clientX;
this.client.clientY = event.clientY;
this.container.width = container.clientWidth;
this.container.height = container.clientHeight;
// console.log(JSON.stringify(this.mouse))
},
replacer(e, py) {
// la ligne suivante est pour éviter les tremblements
if (Math.abs(e.position.y - py) < 0.05) { return true; }
let rhesus = 10 * this.VITESSE_DEPLACEMENT;
if (this.userData.souris[0] !== e.name) { rhesus *= 3; }
// console.log(e.name+': '+this.userData.souris[0]+' - '+rhesus)
if (e.position.y > py) { rhesus = -1; }
e.position.set(0, Math.trunc(10 * e.position.y + rhesus) / 10, 0);
return true;
},
retrecir(n, e) {
// on vérifie si le truc cliqué est dessus
let dec = 0;
const elt = this;
if ((elt.userData.souris.length > 0)
&& (elt.userData.formes.map((x) => x.nom).indexOf(n)
< elt.userData.formes.map((x) => x.nom).indexOf(elt.userData.souris[0]))) {
dec = Math.trunc(10
* e.parent.getObjectByName(elt.userData.souris[0]).userData.decalage
* 2.1) / 10;
}
e.material.color.set(`#${e.userData.couleurs[0]}`);
e.rotation.y += elt.VITESSE_ROTATION;
e.scale.set(e.scale.x > 1
? e.scale.x - elt.VITESSE_ZOOM : e.scale.x,
e.scale.y > 1
? e.scale.y - elt.VITESSE_ZOOM : e.scale.y,
e.scale.z > 1
? e.scale.z - elt.VITESSE_ZOOM : e.scale.z);
const newY = e.userData.position.y + dec;
if (e.position.y !== newY) {
elt.replacer(e, newY);
}
},
animate() {
const elt = this;
requestAnimationFrame(this.animate);
this.raycaster.setFromCamera(this.mouse, this.camera);
this.userData.formes.map((x) => x.nom).forEach((x) => elt.verifForme(x));
if (this.userData.souris.length > 0) {
document.body.style.cursor = 'pointer';
} else { document.body.style.cursor = 'default'; }
this.camera.updateProjectionMatrix();
this.renderer.render(this.scene, this.camera);
},
},
data: () => ({
container: { height: 0, width: 0 },
client: { clientX: 0, clientY: 0 },
scene: new Three.Scene(),
camera: null,
renderer: Three.WebGLRenderer,
mesh: new Three.Mesh(),
factor: 0,
mouse: new Three.Vector2(1, 1),
raycaster: new Three.Raycaster(),
intersects: [],
VITESSE_ROTATION: 0.05,
VITESSE_DEPLACEMENT: 0.1,
VITESSE_ZOOM: 0.05,
RALENTISSEMENT: 3,
userData: {
souris: [],
formes: [
{
nom: 'Box',
userData: {
position: {
x: 0,
y: 7.8,
z: 0,
},
couleurs: [
'aaaaaa',
'095256',
],
decalage: 0.5,
},
},
{
nom: 'Icosahedron',
userData: {
position: {
x: 0,
y: 5.5,
z: 0,
},
couleurs: [
'aaaaaa',
'087F8C',
],
decalage: 0.5,
},
},
{
nom: 'Dodecahedron',
userData: {
position: {
x: 0,
y: 3.1,
z: 0,
},
couleurs: [
'aaaaaa',
'5AAA95',
],
decalage: 0.4,
},
},
{
nom: 'Sphere',
userData: {
position: {
x: 0,
y: 1,
z: 0,
},
couleurs: [
'aaaaaa',
'86A873',
],
decalage: 0.2,
},
},
],
},
}),
};
</script>
以下是我在VueJS 3的控制台中遇到的错误：
three.module.js?5a89:24471 Uncaught TypeError: 'get' on proxy: property 'modelViewMatrix' is a read-only and non-configurable data property on the proxy target but the proxy did not return its actual value (expected '#<Matrix4>' but got '[object Object]')
at renderObject (three.module.js?5a89:24471)
at renderObjects (three.module.js?5a89:24458)
at Proxy.WebGLRenderer.render (three.module.js?5a89:24258)
at animate (HelloWorld.vue?fdab:192)
如果有任何人有线索，请提前感谢...
解决方案
它适用于VUE 2
它在Vue 2上运行良好的原因在于Vue 2使用了基于Object.definePropertyAPI的不同反应系统。
Three.jsa lot使用相同的API向其数据结构添加一些不可写和不可配置的属性
当将具有此类属性的对象传递给Vue时(例如，通过在data中声明它)，Vue只是跳过了此类属性，导致存储值/对象是非反应性的(因为Vue在呈现组件模板时无法检测属性访问)
Vue 3代理
Vue 3正在使用基于ES6proxies的新反应系统。
这是一个非常新的问题，即使已经投入了大量的精力来开发和测试它，随着人们开始迁移，这样的问题也会出现(我完全同意@Serg-Vue 3仍然是新的，除非您有技能和时间生活在边缘&您应该在从Vue 2迁移之前等待一段时间)
这个新的反应性系统不能很好地处理对象上的不可写不可配置属性-您可以在this sandbox
中找到最小的可重现示例- 我知道这是个错误，is reported发送到Vue@Next Repo
- 沙箱使用合成API，但这并不重要，因为使用
reactive()与在data()函数中声明变量相同(Vue会自动为您完成)
解决方法
如前所述，问题出在反应系统上。我不是Three.js方面的专家，但据我所知，将这三个数据结构放到Vue反应系统中没有多大意义-所有反应的要点都是检测数据更改并在需要时重新呈现模板。Three有自己的渲染系统，通常使用单个<canvas>HTML元素，因此在三个数据结构更改时触发Vue重新渲染是没有意义的...
有多种方式可以选择退出Vue Reactive：
- 在对象上使用
Object.freeze()。在这种情况下不是很有用，但很高兴知道 - 不要在
data()中声明变量并在created()/mounted()钩子中赋值(示例如下)。如果需要在多个方法中访问它们，可以将它们赋值到组件本身(this)，如果不需要它们，可以将它们作为局部变量(const/let) - 使用组合API时，不要对三个数据结构使用
reactive()
示例-创建非反应性组件属性
export default {
data() {
return {
};
},
mounted() {
this.init();
},
methods: {
init() {
this.scene = new THREE.Scene();
this.camera = new THREE.OrthographicCamera(...);
this.renderer = new THREE.WebGLRenderer({ ... })
this.geometry = new THREE.PlaneBufferGeometry( );
const material = new THREE.MeshBasicMaterial({ color: 0xff0000 });
this.plane = new THREE.Mesh(this.geometry, material);
this.scene.add(this.plane);
this.renderer.render(this.scene, this.camera);
},
}
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