feat: LOD 网格分级——meshopt 解析期简化 + 按距离/级联选级

vendored meshoptimizer 1.2（submodule 环境故障改直接 vendor）。Mesh 多 LOD：各级索引连续拼进同一 index buffer（共享顶点，LodRange 区间选择），解析期 meshopt_simplify 生成链（LOD0=原始，每级目标减半，相对误差 1e-2，小网格复用上级）；都在 worker 线程，加载零额外卡顿。 SceneRenderer 按 (mesh, LOD) 聚合 batch（lookup key = 指针<<8|lod）：主视图按屏占比近似 radius/dist 选级（阈值 10/20 倍半径）；阴影级联按级联序降级（越远越简）。Draw 按 batch.lod 选索引区间。 A/B 对比（100 背包 10×10，RTX 5060 Laptop，vsync off）： - 纯背包：LOD 开 93-95 fps / 关 90-107 fps —— 无显著差异 - 加 SunTemple：LOD 开 52-56 / 关 51-55 —— 无显著差异结论：当前场景瓶颈不在顶点数（5060 顶点吞吐富余），LOD 基础设施保留（几何复杂资产/低端 GPU/更大场景生效），帧率问题转向 Tracy GPU 时间线定位真实瓶颈。坑：LodRange 记录"LOD 不足复用最后一级"时 first 不得继续累加（buffer 无重复数据，累加必越界——VUID-08798 抓的）。
2026-09-24 20:53:19 +08:00
parent 34b593f734
commit 5bdfb53566
125 changed files with 67608 additions and 29 deletions
@@ -0,0 +1,77 @@
+name: release
+
+on:
+  push:
+    branches:
+      - 'master'
+    paths-ignore:
+      - '*.md'
+
+jobs:
+  gltfpack:
+    strategy:
+      matrix:
+        os: [{ name: windows, version: windows-latest }, { name: ubuntu, version: ubuntu-22.04 }, { name: macos, version: macos-14 }]
+    name: gltfpack-${{matrix.os.name}}
+    runs-on: ${{matrix.os.version}}
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6
+        with:
+          repository: zeux/basis_universal
+          ref: gltfpack
+          path: basis_universal
+      - uses: actions/checkout@v6
+        with:
+          repository: webmproject/libwebp
+          ref: 1.6.0
+          path: libwebp
+      - name: cmake configure
+        run: cmake . -DMESHOPT_BUILD_GLTFPACK=ON -DMESHOPT_GLTFPACK_BASISU_PATH=basis_universal -D MESHOPT_GLTFPACK_LIBWEBP_PATH=libwebp -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded" -DCMAKE_BUILD_TYPE=Release
+      - name: cmake configure x64
+        run: cmake . -DSSE=ON -DBASISU_SSE=ON
+        if: matrix.os.name == 'ubuntu'
+      - name: cmake build
+        run: cmake --build . --target gltfpack --config Release -j 3
+      - uses: actions/upload-artifact@v7
+        with:
+          name: gltfpack-windows
+          path: Release/gltfpack.exe
+        if: matrix.os.name == 'windows'
+      - uses: actions/upload-artifact@v7
+        with:
+          name: gltfpack-${{matrix.os.name}}
+          path: gltfpack
+        if: matrix.os.name != 'windows'
+
+  nodejs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '18'
+      - name: install wasi
+        run: |
+          curl -sL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-$VERSION/wasi-sdk-$VERSION.0-x86_64-linux.deb > wasi-sdk.deb
+          sudo dpkg -i wasi-sdk.deb
+        env:
+          VERSION: 32
+      - name: build
+        run: |
+          make -j2 -B gltf/library.wasm js
+          git status
+      - name: npm pack
+        run: |
+          cp LICENSE.md gltf/
+          cp LICENSE.md js/
+          cd gltf && npm pack && cd ..
+          cd js && npm pack && cd ..
+      - uses: actions/upload-artifact@v7
+        with:
+          name: gltfpack-npm
+          path: gltf/gltfpack-*.tgz
+      - uses: actions/upload-artifact@v7
+        with:
+          name: meshoptimizer-npm
+          path: js/meshoptimizer-*.tgz