vue three.js 获取模型的大小并自动计算缩放比例
时间: 2023-09-05 13:00:30 浏览: 112
在Vue项目中使用Three.js获取模型的大小并自动计算缩放比例的方法如下:
1. 导入Three.js库和模型文件。在Vue项目中,可以通过npm安装Three.js,并在需要使用的组件中引入。
```javascript
import * as THREE from 'three';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader';
```
2. 创建场景、相机和渲染器。
```javascript
let scene, camera, renderer;
function init() {
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
}
```
3. 加载模型文件并添加到场景中。
```javascript
function loadModel() {
const loader = new GLTFLoader();
loader.load('path/to/model.gltf', function(gltf) {
const model = gltf.scene;
scene.add(model);
});
}
```
4. 自动计算模型的大小和缩放比例。
```javascript
function calculateScale() {
const box = new THREE.Box3().setFromObject(model);
const size = box.getSize(new THREE.Vector3()).length();
const targetSize = 10; // 设置目标大小
const scale = targetSize / size;
model.scale.set(scale, scale, scale);
}
```
5. 渲染场景。
```javascript
function animate() {
requestAnimationFrame(animate);
renderer.render(scene, camera);
}
```
完整的Vue组件示例:
```vue
<template>
<div ref="container"></div>
</template>
<script>
import * as THREE from 'three';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader';
export default {
mounted() {
let scene, camera, renderer, model;
function init() {
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
this.$refs.container.appendChild(renderer.domElement);
}
function loadModel() {
const loader = new GLTFLoader();
loader.load('path/to/model.gltf', function(gltf) {
model = gltf.scene;
calculateScale();
scene.add(model);
});
}
function calculateScale() {
const box = new THREE.Box3().setFromObject(model);
const size = box.getSize(new THREE.Vector3()).length();
const targetSize = 10; // 设置目标大小
const scale = targetSize / size;
model.scale.set(scale, scale, scale);
}
function animate() {
requestAnimationFrame(animate);
renderer.render(scene, camera);
}
init();
loadModel();
animate();
}
}
</script>
```