160 lines
4.2 KiB
Markdown
160 lines
4.2 KiB
Markdown
# OSM Asset Pipeline
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把单个园区/片区 OSM XML 转为可消费的 Blender 场景和 Cesium GLB。osm2streets GeoJSON、GeoPackage、QGIS 工程和预览图都是中间资产,用来提供道路几何、调试标线效果,以及给 Blender/Cesium 生成提供输入。
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## 目标产物
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每个区域默认输出到 `outputs/<area-id>/`:
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- `<area-id>.blend`:Blender 场景,包含道路、建筑、水体、植被等
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- `<area-id>.png`:Blender 预览渲染
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- `<area-id>.glb`:Cesium 可加载的 3D 模型
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- `<area-id>.json`:Cesium 放置元数据和示例代码
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- `<area-id>-cesium-preview.html`:Cesium 本地预览页
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- `osm2streets_web_out/`:osm2streets GeoJSON 中间层
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- `<area-id>.gpkg` / `<area-id>.qgz` / `<area-id>-preview.png`:QGIS 调试资产
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## 环境
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需要:
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- macOS QGIS:默认 `/Applications/QGIS.app`
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- Blender:默认 `/Applications/Blender.app`
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- Node.js / npm
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首次使用:
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```bash
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cd /Users/que01/osm2streets-qgis-workflow
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npm install
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```
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## 主流程
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默认构建南台子湖创新谷样例:
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```bash
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npm run build
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```
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指定区域配置:
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```bash
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npm run build:area -- --config config/areas/hanyang-block.json
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```
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只跑部分阶段:
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```bash
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npm run build:area -- --config config/areas/nantaizi-lake-innovation-valley.json --stages intermediates
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npm run build:area -- --config config/areas/nantaizi-lake-innovation-valley.json --stages blender
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npm run build:area -- --config config/areas/nantaizi-lake-innovation-valley.json --stages cesium
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npm run build:area -- --config config/areas/nantaizi-lake-innovation-valley.json --stages preview
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```
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`intermediates` 会生成 osm2streets GeoJSON、GeoPackage、QGIS 工程和 QGIS 预览图。`blender` 使用 OSM 和 osm2streets GeoJSON 生成 `.blend`/`.png`。`cesium` 从 `.blend` 导出 `.glb`/`.json`,并生成 Cesium 预览 HTML。`preview` 只在已有 `.glb/.json` 时补生成 HTML。
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## 区域配置
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新区域从模板复制:
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```bash
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cp config/examples/template.json config/areas/my-area.json
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```
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核心配置:
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```json
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{
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"id": "my-area",
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"input": "/absolute/path/to/input.osm",
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"outputRoot": "/absolute/path/to/outputs",
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"qgisApp": "/Applications/QGIS.app",
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"blenderApp": "/Applications/Blender.app",
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"stages": {
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"intermediates": true,
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"blender": true,
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"cesium": true
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},
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"qgis": {
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"arrowScale": 0.8,
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"clipPad": 0.002,
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"canvasPad": 0.001,
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"previewPad": 0.0007,
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"canvasExtent": null,
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"previewExtent": null,
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"layerPrefix": "osm2streets"
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},
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"blender": {
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"treeStyle": "natural",
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"officeOverrides": ""
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}
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}
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```
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`scripts/build-area.js` 会按 `id` 自动推导默认输出路径。确实需要定制时,可以增加 `outputs` 覆盖:
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```json
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{
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"outputs": {
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"areaDir": "/absolute/path/to/custom-area",
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"blend": "/absolute/path/to/custom.blend",
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"glb": "/absolute/path/to/custom.glb",
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"cesiumPreview": "/absolute/path/to/custom-preview.html"
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}
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}
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```
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预览 Cesium 页面时,需要在输出目录启动 HTTP 服务,避免浏览器拦截本地文件请求:
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```bash
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cd outputs/my-area
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python3 -m http.server 8765
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```
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然后打开 `http://localhost:8765/my-area-cesium-preview.html`。
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## 已沉淀区域
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- `config/areas/nantaizi-lake-innovation-valley.json`
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- `config/areas/hanyang-block.json`
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## 低层命令
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通常优先使用 `npm run build:area`。如果只想调试旧 QGIS/osm2streets 阶段,可以直接运行:
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```bash
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npm run build:qgis -- --config config/hanyang-block.json
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```
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Blender 低层命令:
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```bash
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/Applications/Blender.app/Contents/MacOS/Blender \
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--background --factory-startup \
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--python blender/generate_scene.py -- \
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--osm "/path/to/input.osm" \
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--geojson "/path/to/osm2streets_web_out" \
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--output "/path/to/scene.blend" \
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--render "/path/to/preview.png" \
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--tree-style natural
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```
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Cesium GLB 低层导出:
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```bash
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/Applications/Blender.app/Contents/MacOS/Blender \
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--background \
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--python blender/export_cesium.py -- \
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--blend "/path/to/scene.blend" \
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--glb "/path/to/scene.glb" \
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--metadata "/path/to/scene.json"
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```
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详见 [blender/README.md](blender/README.md)。
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## 文档
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- [docs/input-cases.md](docs/input-cases.md) - 已验证的 OSM 输入案例
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- [docs/changelog.md](docs/changelog.md) - 变更记录
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