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219
app/composables/powerStation/modes/useSimplifiedMode.ts
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219
app/composables/powerStation/modes/useSimplifiedMode.ts
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/**
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* 简化模式 - 模型加载
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* 按文件名直接加载模型,支持按需加载和自动回退
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*/
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import { ElMessage } from 'element-plus'
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import type * as THREE from 'three'
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import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader.js'
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import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js'
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import { markRaw } from 'vue'
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import type { ModelModeContext } from '../types'
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// ============================================================
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// 配置常量
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// ============================================================
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/** DRACO解码器路径 */
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const DRACO_DECODER_PATH = 'https://www.gstatic.com/draco/v1/decoders/'
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/** 简化模式配置 */
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const SIMPLIFIED_MODE_CONFIG = {
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/** 层级显示的最大深度 */
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maxHierarchyDepth: 2,
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/** 模型文件扩展名 */
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fileExtension: '.glb',
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} as const
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// ============================================================
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// 主钩子函数
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// ============================================================
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/**
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* 简化模式组合式函数
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* @param context - 模型模式上下文
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*/
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export function useSimplifiedMode(context: ModelModeContext) {
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const {
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store,
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isLoading,
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archetypeModel,
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modelGroup,
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objectMap,
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modelCache,
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replaceWithPBRMaterial,
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generateHierarchy,
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initEnvironment,
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applyLightingMode,
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fitView,
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rebuildObjectMap,
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generateBreadcrumbs,
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} = context
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// ============================================================
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// 模型设置
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// ============================================================
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/**
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* 从缓存设置模型
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* @param model - 缓存的模型
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* @param fileName - 文件名
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*/
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const setupModelFromCache = (model: THREE.Object3D, fileName: string) => {
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const clonedModel = model.clone()
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const nameWithoutExt = fileName.replace(SIMPLIFIED_MODE_CONFIG.fileExtension, '')
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// 设置模型名称
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clonedModel.name = nameWithoutExt
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// 更新原型模型
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archetypeModel.value = markRaw(clonedModel.clone())
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// 清空并添加到模型组
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modelGroup.clear()
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modelGroup.add(clonedModel)
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// 生成层级结构(只显示指定深度的节点)
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let hierarchy = []
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if (clonedModel.children.length > 0) {
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// 如果模型有子节点,将每个子节点作为一级节点
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clonedModel.children.forEach((child, index) => {
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const childPath = index === 0 ? nameWithoutExt : `${nameWithoutExt}~child${index}`
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const childHierarchy = generateHierarchy(
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child,
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childPath,
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1,
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SIMPLIFIED_MODE_CONFIG.maxHierarchyDepth
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)
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hierarchy.push(childHierarchy)
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})
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} else {
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// 如果模型没有子节点,使用模型本身作为一级节点
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const modelHierarchy = generateHierarchy(
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clonedModel,
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nameWithoutExt,
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1,
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SIMPLIFIED_MODE_CONFIG.maxHierarchyDepth
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)
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hierarchy = [modelHierarchy]
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}
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store.modelHierarchy = hierarchy
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// 生成面包屑(返回供调用者处理)
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const breadcrumbs = generateBreadcrumbs(nameWithoutExt)
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// 重建物体映射
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objectMap.clear()
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rebuildObjectMap(clonedModel)
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// 初始化环境和光照
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initEnvironment()
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applyLightingMode()
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// 适配视图
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fitView(clonedModel)
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}
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// ============================================================
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// 模型加载
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// ============================================================
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/**
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* 根据命名约定构建模型URL
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* @param fileName - 文件名
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* @returns 完整URL路径
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*/
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const buildModelUrl = (fileName: string): string => {
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// 格式: Root~Parent~Child.glb -> /3DModels/Root/Root~Parent~Child.glb
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const nameWithoutExt = fileName.slice(0, -4)
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const rootFolder = nameWithoutExt.split('~')[0]
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return `/3DModels/${rootFolder}/${fileName}`
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}
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/**
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* 按文件名加载模型
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* @param fileName - 文件名(可带或不带.glb扩展名)
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* @param onLoaded - 加载完成回调
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*/
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const loadModelByFileName = (fileName: string, onLoaded?: () => void) => {
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// 确保有.glb扩展名
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if (!fileName.endsWith(SIMPLIFIED_MODE_CONFIG.fileExtension)) {
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fileName += SIMPLIFIED_MODE_CONFIG.fileExtension
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}
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// 检查缓存
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if (store.modelCacheEnabled && modelCache.has(fileName)) {
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const cached = modelCache.get(fileName)!
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setupModelFromCache(cached, fileName)
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if (onLoaded) onLoaded()
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return
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}
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// 开始加载
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isLoading.value = true
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store.isModelLoading = true
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const url = buildModelUrl(fileName)
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console.log(`从 ${url} 加载模型`)
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// 创建加载器
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const loader = new GLTFLoader()
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const dracoLoader = new DRACOLoader()
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dracoLoader.setDecoderPath(DRACO_DECODER_PATH)
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loader.setDRACOLoader(dracoLoader)
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loader.load(
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url,
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gltf => {
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const rawModel = gltf.scene
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replaceWithPBRMaterial(rawModel)
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// 缓存模型
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if (store.modelCacheEnabled) {
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modelCache.set(fileName, rawModel.clone())
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}
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// 设置模型
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setupModelFromCache(rawModel, fileName)
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isLoading.value = false
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store.isModelLoading = false
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dracoLoader.dispose()
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if (onLoaded) onLoaded()
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},
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undefined,
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error => {
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console.warn('加载模型失败:', fileName, error)
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ElMessage.error(`模型加载失败: ${fileName},请检查网络连接或模型文件是否存在`)
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// 回退逻辑:尝试加载父级模型
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const nameWithoutExt = fileName.slice(0, -4)
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const parts = nameWithoutExt.split('~')
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if (parts.length > 1) {
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// 移除最后一级,尝试加载父级
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parts.pop()
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const parentName = parts.join('~')
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console.log('回退到父级:', parentName)
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loadModelByFileName(parentName, onLoaded)
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} else {
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// 没有父级可回退
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console.error('没有父级可以回退,或根节点加载失败。')
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isLoading.value = false
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store.isModelLoading = false
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dracoLoader.dispose()
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}
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}
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)
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}
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// ============================================================
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// 导出接口
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// ============================================================
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return {
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/** 按文件名加载模型 */
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loadModelByFileName,
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}
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}
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