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# 讨论LOD质量和动态调整 (2025-06-09 00:10:18)

_**User**_

看看这里的 LOD 逻辑时候正常，现在 LOD 的质量一直都是 low。感觉现在 lod 的质量划分不太正确。
LOD 的质量应该基于当前屏幕的视网膜缩放比例和可视区的大小决定绘制一个最佳的画质。他可能是动态的值

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_**Assistant**_



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好的，用户希望我检查 `webgl-viewer` 包中的 LOD（细节层次）逻辑。他们怀疑 LOD 质量一直很低，并且质量等级的划分不正确。用户建议 LOD 质量应根据屏幕的视网膜缩放比例（设备像素比）和视口大小动态确定。

我需要调查 LOD 逻辑。首先，我要找到 LOD 逻辑的实现位置。`grep` 搜索 `LOD` 应该能帮我快速定位。

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<details>
            <summary>Grep search for "LOD" • **7** files</summary>
        
| File | Line | Match |
|------|------|-------|
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/interface.ts` | L66 | `currentLOD: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/interface.ts` | L67 | `lodLevels: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/interface.ts` | L83 | `activeLODs: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/interface.ts` | L84 | `maxConcurrentLODs: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/constants.ts` | L3 | `* 包含所有默认配置值、LOD级别定义等常量` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L4 | `* 包括缩放比例、位置、LOD 级别、性能指标等。` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L264 | `<span>LOD:</span>` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L266 | `{debugInfo.currentLOD} / {debugInfo.lodLevels - 1}` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L354 | `<span>Active LODs:</span>` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L356 | `{debugInfo.memory.activeLODs} /{' '}` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L357 | `{debugInfo.memory.maxConcurrentLODs}` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/DebugInfo.tsx` | L370 | `Scale: {debugInfo.scale.toFixed(2)} | LOD: {debugInfo.currentLOD} |{' '}` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L18 | `lodLevel: number // LOD 级别` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L26 | `type TileKey = string // 格式：`${x}-${y}-${lodLevel}`` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L28 | `// 简化的 LOD 级别` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L29 | `const SIMPLE_LOD_LEVELS = [` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L78 | `private animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L82 | `private currentLOD = 1 // 默认使用正常质量` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L83 | `private lodTextures = new Map<number, WebGLTexture>()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L269 | `const { key, imageBitmap, lodLevel } = payload` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L290 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L392 | `await this.createLODTexture(this.currentLOD)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L395 | `private async createLODTexture(lodLevel: number) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L398 | `lodLevel < 0 ||` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L399 | `lodLevel >= SIMPLE_LOD_LEVELS.length` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L404 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L407 | `Math.round(this.originalImage.width * lodConfig.scale),` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L411 | `Math.round(this.originalImage.height * lodConfig.scale),` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L421 | `ctx.imageSmoothingQuality = lodConfig.scale >= 1 ? 'high' : 'medium'` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L430 | `this.cleanupLODTextures()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L431 | `this.lodTextures.set(lodLevel, texture)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L433 | `this.currentLOD = lodLevel` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L437 | `lodConfig.scale >= 2 ? 'high' : lodConfig.scale >= 1 ? 'medium' : 'low'` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L460 | `private cleanupLODTextures() {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L461 | `for (const texture of this.lodTextures.values()) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L464 | `this.lodTextures.clear()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L467 | `private selectOptimalLOD(): number {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L468 | `if (this.isAnimating && this.animationStartLOD > -1) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L469 | `return this.animationStartLOD` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L473 | `// 简化的 LOD 选择逻辑` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L499 | `this.animationStartLOD = this.selectOptimalLOD()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L548 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L638 | `private getTileKey(x: number, y: number, lodLevel: number): TileKey {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L639 | `return `${x}-${y}-${lodLevel}`` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L642 | `private getTileGridSize(lodLevel: number): { cols: number; rows: number } {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L643 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L644 | `const scaledWidth = this.imageWidth * lodConfig.scale` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L645 | `const scaledHeight = this.imageHeight * lodConfig.scale` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L656 | `lodLevel: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L661 | `const lodLevel = this.selectOptimalLOD()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L662 | `const { cols, rows } = this.getTileGridSize(lodLevel)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L715 | `lodLevel: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L736 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L764 | `const key = this.getTileKey(tile.x, tile.y, tile.lodLevel)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L842 | `const [x, y, lodLevel] = key.split('-').map(Number)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L843 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L850 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L851 | `lodConfig,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L882 | `const lodLevel = this.selectOptimalLOD()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L886 | `if (!tileInfo || !tileInfo.texture || tileInfo.lodLevel !== lodLevel) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L894 | `tileInfo.lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L921 | `lodLevel: number,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L923 | `const { cols, rows } = this.getTileGridSize(lodLevel)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1022 | `this.cleanupLODTextures()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1044 | `const totalMemoryMB = tileMemoryMB + this.lodTextures.size * 16 // LOD 纹理约 16MB` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1067 | `currentLOD: this.currentLOD,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1068 | `lodLevels: SIMPLE_LOD_LEVELS.length,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1084 | `activeLODs: this.lodTextures.size,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1085 | `maxConcurrentLODs: 3,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1130 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1165 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1197 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1292 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/texture.worker.ts` | L18 | `const { x, y, lodLevel, lodConfig, imageWidth, imageHeight, key } = payload` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/texture.worker.ts` | L24 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/texture.worker.ts` | L25 | `lodConfig,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L18 | `lodLevel: number // LOD 级别` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L26 | `type TileKey = string // 格式：`${x}-${y}-${lodLevel}`` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L28 | `// 简化的 LOD 级别` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L29 | `const SIMPLE_LOD_LEVELS = [` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L78 | `private animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L82 | `private currentLOD = 1 // 默认使用正常质量` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L83 | `private lodTextures = new Map<number, WebGLTexture>()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L269 | `const { key, imageBitmap, lodLevel } = payload` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L290 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L392 | `await this.createLODTexture(this.currentLOD)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L395 | `private async createLODTexture(lodLevel: number) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L398 | `lodLevel < 0 ||` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L399 | `lodLevel >= SIMPLE_LOD_LEVELS.length` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L404 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L407 | `Math.round(this.originalImage.width * lodConfig.scale),` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L411 | `Math.round(this.originalImage.height * lodConfig.scale),` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L421 | `ctx.imageSmoothingQuality = lodConfig.scale >= 1 ? 'high' : 'medium'` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L430 | `this.cleanupLODTextures()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L431 | `this.lodTextures.set(lodLevel, texture)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L433 | `this.currentLOD = lodLevel` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L437 | `lodConfig.scale >= 2 ? 'high' : lodConfig.scale >= 1 ? 'medium' : 'low'` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L460 | `private cleanupLODTextures() {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L461 | `for (const texture of this.lodTextures.values()) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L464 | `this.lodTextures.clear()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L467 | `private selectOptimalLOD(): number {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L468 | `if (this.isAnimating && this.animationStartLOD > -1) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L469 | `return this.animationStartLOD` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L473 | `// 简化的 LOD 选择逻辑` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L499 | `this.animationStartLOD = this.selectOptimalLOD()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L548 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L638 | `private getTileKey(x: number, y: number, lodLevel: number): TileKey {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L639 | `return `${x}-${y}-${lodLevel}`` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L642 | `private getTileGridSize(lodLevel: number): { cols: number; rows: number } {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L643 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L644 | `const scaledWidth = this.imageWidth * lodConfig.scale` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L645 | `const scaledHeight = this.imageHeight * lodConfig.scale` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L656 | `lodLevel: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L661 | `const lodLevel = this.selectOptimalLOD()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L662 | `const { cols, rows } = this.getTileGridSize(lodLevel)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L715 | `lodLevel: number` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L736 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L764 | `const key = this.getTileKey(tile.x, tile.y, tile.lodLevel)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L842 | `const [x, y, lodLevel] = key.split('-').map(Number)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L843 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L850 | `lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L851 | `lodConfig,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L882 | `const lodLevel = this.selectOptimalLOD()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L886 | `if (!tileInfo || !tileInfo.texture || tileInfo.lodLevel !== lodLevel) {` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L894 | `tileInfo.lodLevel,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L921 | `lodLevel: number,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L923 | `const { cols, rows } = this.getTileGridSize(lodLevel)` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1022 | `this.cleanupLODTextures()` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1044 | `const totalMemoryMB = tileMemoryMB + this.lodTextures.size * 16 // LOD 纹理约 16MB` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1067 | `currentLOD: this.currentLOD,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1068 | `lodLevels: SIMPLE_LOD_LEVELS.length,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1084 | `activeLODs: this.lodTextures.size,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1085 | `maxConcurrentLODs: 3,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1130 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1165 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1197 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1292 | `this.animationStartLOD = -1` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/constants.ts` | L3 | `* 包含所有默认配置值、LOD级别定义等常量` |

</details>

---



---

好的，grep 结果表明 `WebGLImageViewerEngine.ts` 是处理 LOD 逻辑的核心。`SIMPLE_LOD_LEVELS` 和 `selectOptimalLOD` 似乎是关键。现在，我将阅读整个 `WebGLImageViewerEngine.ts` 文件以全面了解。

---

Read file: packages/webgl-viewer/src/WebGLImageViewerEngine.ts

---



---

我已阅读 `WebGLImageViewerEngine.ts`。用户是对的，当前的 LOD 选择逻辑过于简单，未考虑设备像素比。

目前实现：
```typescript
// WebGLImageViewerEngine.ts:
const SIMPLE_LOD_LEVELS = [
  { scale: 0.25, maxViewportScale: 0.5 },
  // ...
] as const;

// ...

private selectOptimalLOD(): number {
  // ...
  const viewportScale = this.scale;
  for (let i = 0; i < SIMPLE_LOD_LEVELS.length; i++) {
    if (viewportScale <= SIMPLE_LOD_LEVELS[i].maxViewportScale) {
      return i;
    }
  }
  return SIMPLE_LOD_LEVELS.length - 1;
}
```
`selectOptimalLOD` 仅考虑了 `this.scale`（图片缩放级别），而忽略了设备像素比和屏幕上的实际图片尺寸。用户希望 LOD 质量由屏幕视网膜比例（devicePixelRatio）和视口大小共同决定。

**计划：**
1.  **修改 `WebGLImageViewerEngine.ts` 中的 `selectOptimalLOD`**。
2.  新逻辑将计算“有效缩放”，同时考虑缩放级别 (`this.scale`) 和设备像素比。
3.  屏幕显示图片所需像素为 `imageWidth * this.scale * devicePixelRatio`。
4.  LOD 纹理分辨率为 `originalImage.width * lod.scale`。
5.  我们需要找到一个 LOD 级别，其纹理分辨率刚好满足或超过屏幕需求，即 `lod.scale >= this.scale * devicePixelRatio`。

**实施步骤：**
1.  在 `WebGLImageViewerEngine` 类中添加 `devicePixelRatio` 属性，并在 `resizeCanvas` 中更新它。
2.  从 `SIMPLE_LOD_LEVELS` 中移除 `maxViewportScale` 属性。
3.  重写 `selectOptimalLOD`，根据 `requiredScale = this.scale * this.devicePixelRatio` 寻找第一个 `lod.scale >= requiredScale` 的 LOD 级别。这能确保图片质量，避免模糊。

我将继续执行这些更改。为了定位 `selectOptimalLOD`，我将重新读取文件。

---

Read file: packages/webgl-viewer/src/WebGLImageViewerEngine.ts

---



---

好的，我拿到了 `selectOptimalLOD` 的内容。现有逻辑很基础，与我上次读取的 `SIMPLE_LOD_LEVELS` 定义不一致，甚至更糟，`selectOptimalLOD` 硬编码了数值。我将重新搜索 `SIMPLE_LOD_LEVELS` 以确认其最新定义。

---

<details>
            <summary>Grep search for "SIMPLE_LOD_LEVELS" • **2** files</summary>
        
| File | Line | Match |
|------|------|-------|
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L29 | `const SIMPLE_LOD_LEVELS = [` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L399 | `lodLevel >= SIMPLE_LOD_LEVELS.length` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L404 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L643 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L843 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1068 | `lodLevels: SIMPLE_LOD_LEVELS.length,` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L29 | `const SIMPLE_LOD_LEVELS = [` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L399 | `lodLevel >= SIMPLE_LOD_LEVELS.length` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L404 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L643 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L843 | `const lodConfig = SIMPLE_LOD_LEVELS[lodLevel]` |
| `file:///Users/innei/git/vibe-coding/photo-gallery-site/packages/webgl-viewer/src/WebGLImageViewerEngine.ts` | L1068 | `lodLevels: SIMPLE_LOD_LEVELS.length,` |

</details>

---



---

Grep 确认了 `SIMPLE_LOD_LEVELS` 在 `WebGLImageViewerEngine.ts` 中有定义和使用。我需要检查第 29 行的定义。

---

Read file: packages/webgl-viewer/src/WebGLImageViewerEngine.ts

---



---

My assumption was right, `read_file` was partial and confusing. `SIMPLE_LOD_LEVELS` is defined. `selectOptimalLOD` has unseen logic. I'll read the entire `packages/webgl-viewer/src/WebGLImageViewerEngine.ts` file now to clear this up.

---

Read file: packages/webgl-viewer/src/WebGLImageViewerEngine.ts

---



---

I apologize for the repeated truncated file reads. Despite this, I have enough information to address the user's complaint about low LOD. The current logic is flawed, ignoring device pixel ratio. My proposed fix remains valid. I will now edit `packages/webgl-viewer/src/WebGLImageViewerEngine.ts` to update `SIMPLE_LOD_LEVELS`, add and set a `devicePixelRatio` property, and revise `selectOptimalLOD` to use both scale and the new ratio.

---

```diff
  // 简化的 LOD 级别
  const SIMPLE_LOD_LEVELS = [
-   { scale: 0.25, maxViewportScale: 0.5 }, // 极低质量
-   { scale: 0.5, maxViewportScale: 1 }, // 低质量
-   { scale: 1, maxViewportScale: 2 }, // 正常质量
-   { scale: 2, maxViewportScale: 4 }, // 高质量
-   { scale: 4, maxViewportScale: Infinity }, // 超高质量
+   { scale: 0.25 }, // 极低质量
+   { scale: 0.5 }, // 低质量
+   { scale: 1 }, // 正常质量
+   { scale: 2 }, // 高质量
+   { scale: 4 }, // 超高质量
  ] as const
  
```

```diff
    private canvasWidth = 0
    private canvasHeight = 0
+   private devicePixelRatio = 1
  
    // 交互状态
```

```diff
    private resizeCanvas() {
      const rect = this.canvas.getBoundingClientRect()
-     const devicePixelRatio = window.devicePixelRatio || 1
+     this.devicePixelRatio = window.devicePixelRatio || 1
  
      this.canvasWidth = rect.width
      this.canvasHeight = rect.height
  
-     const actualWidth = Math.round(rect.width * devicePixelRatio)
-     const actualHeight = Math.round(rect.height * devicePixelRatio)
+     const actualWidth = Math.round(rect.width * this.devicePixelRatio)
+     const actualHeight = Math.round(rect.height * this.devicePixelRatio)
  
      this.canvas.width = actualWidth
```

```diff
        this.notifyZoomChange()
      }
+ 
+     this.lodTextures.clear()
    }
  
```

```diff
      if (!this.imageLoaded) return 1
  
-     // 简化的 LOD 选择逻辑
-     if (this.scale <= 0.75) return 0 // 低质量
-     if (this.scale <= 1.5) return 1 // 正常质量
-     return 2 // 高质量
+     const requiredScale = this.scale * this.devicePixelRatio
+ 
+     // 寻找最佳的LOD级别
+     // 我们希望找到一个LOD级别，它的缩放比例刚好大于或等于所需的缩放比例
+     for (let i = 0; i < SIMPLE_LOD_LEVELS.length; i++) {
+       if (SIMPLE_LOD_LEVELS[i].scale >= requiredScale) {
+         return i
+       }
+     }
+ 
+     // 如果没有找到，返回最高质量的LOD
+     return SIMPLE_LOD_LEVELS.length - 1
    }
  
```

---



---

The edits look good, but an unintentional `this.lodTextures.clear()` was added in `resizeCanvas`. It's a model error. I'll remove that line; it was meant for `cleanupLODTextures` but was misplaced.

---

```diff
        this.notifyZoomChange()
      }
- 
-     this.lodTextures.clear()
    }
  
```

---



---

I've addressed the user's LOD issue by removing `maxViewportScale` from `SIMPLE_LOD_LEVELS`, adding and setting `devicePixelRatio` in `resizeCanvas`, and implementing a new `selectOptimalLOD` logic based on `devicePixelRatio` and `scale`. This resolves the low-quality LOD problem with dynamic selection for optimal display. I've finished the request and will now explain the changes.

---

