threejs 加载各种格式的3d模型 封装

threejs 加载各种格式的3d模型 封装

import { FBXLoader } from 'three/examples/jsm/loaders/FBXLoader';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader';
import { MTLLoader } from 'three/examples/jsm/loaders/MTLLoader';
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader';
import { LoadingManager } from 'three';
import { Message } from 'element-ui';
import Vue from 'vue';

let loading;

/**
 * 加载.obj模型文件
 * @param {String} objUrl
 * @returns
 */
export function onlyObjloader(objUrl) {
	loading = Vue.prototype.$loading({
		lock: true,
		text: 'Loading',
		spinner: 'el-icon-loading',
		background: 'rgba(0, 0, 0, 0.7)',
	});

	return new Promise((resolve) => {
		//  初始化obj
		var objLoader = new OBJLoader();

		objLoader.load(
			objUrl,
			(obj) => {
				resolve({ obj });
				setTimeout(() => {
					loading.close();
				}, 500);
			},
			(rate) => {},
			(err) => {
				console.log(err);
				Message({
					message: `加载失败: ${err.message}`,
					type: 'error',
					duration: 3000,
				});
				setTimeout(() => {
					loading.close();
				}, 500);
			}
		);
	});
}

/**
 * 加载.obj和.mtl模型文件
 * @param {String} mtlUrl
 * @param {String} objUrl
 * @returns
 */
export function objloader(mtlUrl, objUrl) {
	loading = Vue.prototype.$loading({
		lock: true,
		text: 'Loading',
		spinner: 'el-icon-loading',
		background: 'rgba(0, 0, 0, 0.7)',
	});

	return new Promise((resolve) => {
		var mtlLoader = new MTLLoader();
		//  初始化obj
		var objLoader = new OBJLoader();
		// 加载mtl文件
		mtlLoader.load(
			mtlUrl,
			(mtl) => {
				// 初始化
				mtl.preload();
				// 加载贴图
				objLoader.setMaterials(mtl);
				objLoader.load(
					objUrl,
					(obj) => {
						resolve({ mtl, obj });
						setTimeout(() => {
							loading.close();
						}, 500);
					},
					() => {},
					(err) => {
						console.log(err);
						Message({
							message: `加载失败: ${err.message}`,
							type: 'error',
							duration: 3000,
						});
						setTimeout(() => {
							loading.close();
						}, 500);
					}
				);
			},
			() => {},
			(err) => {
				Message({
					message: `加载失败: ${err.message}`,
					type: 'error',
					duration: 3000,
				});
				setTimeout(() => {
					loading.close();
				}, 500);
			}
		);
	});
}

/**
 * 加载.fbx文件
 * @param {*} fbxUrl
 * @returns
 */
export function fbxloader(fbxUrl) {
	loading = Vue.prototype.$loading({
		lock: true,
		text: 'Loading',
		spinner: 'el-icon-loading',
		background: 'rgba(0, 0, 0, 0.7)',
	});
	return new Promise((resolve) => {
		var loader = new FBXLoader();
		loader.load(
			fbxUrl,
			(fbx) => {
				resolve(fbx);
				setTimeout(() => {
					loading.close();
				}, 500);
			},
			() => {},
			(err) => {
				console.log(err);
				Message({
					message: `加载失败: ${err.message}`,
					type: 'error',
					duration: 3000,
				});
				setTimeout(() => {
					loading.close();
				}, 500);
			}
		);
	});
}

/**
 * 加载.gtlf或.glb文件
 * @param {String} path
 * @returns
 */
export function gltfloader(path) {
	loading = Vue.prototype.$loading({
		lock: true,
		text: 'Loading',
		spinner: 'el-icon-loading',
		background: 'rgba(0, 0, 0, 0.7)',
	});

	return new Promise((resolve) => {
		var loader = new GLTFLoader();
		loader.load(
			path,
			(gltf) => {
				resolve(gltf);
				setTimeout(() => {
					loading.close();
				}, 500);
			},
			() => {},
			(err) => {
				console.log(err);
				Message({
					message: `加载失败: ${err.message}`,
					type: 'error',
					duration: 3000,
				});
				setTimeout(() => {
					loading.close();
				}, 500);
			}
		);
	});
}

/**
 * 使用dracoLoader 加载.gtlf或.glb文件
 * @param {String} path
 * @returns
 */
export function dracoLoader(path) {
	loading = Vue.prototype.$loading({
		lock: true,
		text: 'Loading',
		spinner: 'el-icon-loading',
		background: 'rgba(0, 0, 0, 0.7)',
	});

	return new Promise((resolve) => {
		const loader = new GLTFLoader(new LoadingManager()); //实时显示进度
		const dracoLoader = new DRACOLoader();
		/*
		- 设置在线路径: dracoLoader.setDecoderPath('https://www.gstatic.com/draco/versioned/decoders/1.5.6/');
		- 设置本地路径: 将node_modules文件夹下three库中的draco_decoder.js文件复制到/public/three/decoder 文件夹下
		*/
		dracoLoader.setDecoderPath('/three/decoder/');
		dracoLoader.setDecoderConfig({ type: 'js' }); //使用js方式解压
		dracoLoader.preload(); //初始化_initDecoder 解码器
		loader.setDRACOLoader(dracoLoader); //gltfloader使用dracoLoader

		loader.load(
			path,
			(gltf) => {
				resolve(gltf);
				setTimeout(() => {
					loading.close();
				}, 500);
			},
			() => {},
			(err) => {
				console.log(err);
				Message({
					message: `加载失败: ${err.message}`,
					type: 'error',
					duration: 3000,
				});
				setTimeout(() => {
					loading.close();
				}, 500);
			}
		);
	});
}

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