574a768e09* feat: add script to generate 300x300 grid-cell.png screenshots for examples
- Add generate-grid-screenshots.spec.ts Playwright test to capture screenshots
- Add npm run generate:screenshots command (Docker-based for Santa compatibility)
- Add sharp dependency for image resizing with centered-fill mode
- Generate grid-cell.png for 14 example servers (only React for basic-server-* series)
The screenshots are 300x300 PNG images cropped with centered fill mode,
suitable for use in a grid layout showcasing the examples.
* docs: add example gallery grid to README
Add a 3-column visual grid showcasing 14 example MCP Apps with:
- Thumbnail screenshots (300x300 grid-cell.png)
- Clickable links to example directories
- Hover tooltips with brief descriptions
Organized by visual impact: 3D/WebGL examples first, then
visualizations, charts, monitoring, and starter templates.
* fix: use aspect-fit instead of crop for screenshots
Change from fit: 'cover' (crops) to fit: 'contain' (letterbox)
so the full app content is visible without cropping.
* feat: improve screenshot generation
- Constrain viewport to 500px width for consistent rendering
- Wait 5 seconds for full app load (tiles, animations, data)
- Screenshot just the inner iframe (no extra whitespace)
- Save both screenshot.png (full-size) and grid-cell.png (300x300 thumbnail)
- Use contain mode to preserve aspect ratio
* fix: use cover mode with top alignment for grid thumbnails
No letterboxing - crops to fill 300x300, aligned to top so headers
and important content are always visible.
* feat: improve screenshot gallery
- Remove integration-server from gallery (it's for E2E testing only)
- Add 30s extra wait for Map and Video servers to load fully
- Improve Three.js default scene: isometric rotation + better lighting
- Update README: Starter Templates row with links to all framework variants
(React, Vue, Svelte, Preact, Solid, Vanilla JS)
- Regenerate all screenshots with updated settings
* fix: improve README gallery layout
- Fix uneven column widths by using minimal separator
- Move Starter Templates to separate 2-cell table with description
- Add screenshot.png to top of each example README (13 examples)
- Shorten tooltips for cleaner table
* revert to document.write again; cesiumjs doesn't like srcdoc, period.
* fix: map-server screenshot now renders properly
- Merged ochafik/post-fixes which reverts sandbox from srcdoc to document.write
(CesiumJS doesn't work with srcdoc iframes)
- Fixed map-server name in screenshot test ('Map Server' not 'CesiumJS Map Server')
- Simplified screenshot generation script (removed complex debugging code)
- Increased map-server wait time to 45s for reliable tile loading
- Regenerated all 13 screenshots
* fix: remove redundant screenshots from READMEs
Remove the simple \ line from READMEs that
already had nicer HTML table screenshots. Keep it only for examples
that didn't have existing screenshots.
* docs: move gallery to Examples section
- Move screenshot gallery from top of README to Examples section
- Remove redundant list of basic examples (now shown visually in gallery)
- Clean up duplicate run instructions
* fix: remove empty header row from starter templates table
* fix: remove empty header rows from both tables
* fix: add prettier-ignore to prevent table header expansion
* feat: use custom screenshot for video-resource-server
- Use better screenshot from PR #253 comment showing actual video playback
- Skip video-resource-server in screenshot generation script
- Add SKIP_SERVERS set for manually maintained screenshots
* fix: revert unrelated map-server name change
* fix: use correct server name 'CesiumJS Map Server' in screenshot test
92 lines
2.4 KiB
Markdown
92 lines
2.4 KiB
Markdown
# Example: Interactive Map
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Interactive 3D globe viewer using CesiumJS with OpenStreetMap tiles. Demonstrates geocoding integration and full MCP App capabilities.
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## Features
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- **3D Globe Rendering**: Interactive CesiumJS globe with rotation, zoom, and 3D perspective
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- **Geocoding**: Search for places using OpenStreetMap Nominatim (no API key required)
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- **OpenStreetMap Tiles**: Uses free OSM tile server (no Cesium Ion token needed)
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- **Dynamic Loading**: CesiumJS loaded from CDN at runtime for smaller bundle size
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## Running
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1. Install dependencies:
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```bash
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npm install
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```
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2. Build and start the server:
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```bash
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npm run start:http # for Streamable HTTP transport
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# OR
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npm run start:stdio # for stdio transport
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```
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3. View using the [`basic-host`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-host) example or another MCP Apps-compatible host.
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## Tools
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### `geocode`
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Search for places by name or address. Returns coordinates and bounding boxes.
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```json
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{
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"query": "Eiffel Tower"
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}
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```
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Returns up to 5 matches with lat/lon coordinates and bounding boxes.
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### `show-map`
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Display the 3D globe zoomed to a bounding box.
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```json
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{
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"west": 2.29,
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"south": 48.85,
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"east": 2.3,
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"north": 48.86,
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"label": "Eiffel Tower"
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}
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```
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Defaults to London if no coordinates provided.
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## Architecture
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### Server (`server.ts`)
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Exposes two tools:
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- `geocode` - Queries OpenStreetMap Nominatim API with rate limiting
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- `show-map` - Renders the CesiumJS globe UI at a specified location
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Configures Content Security Policy to allow fetching tiles from OSM and Cesium CDN.
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### App (`src/mcp-app.ts`)
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Vanilla TypeScript app that:
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- Dynamically loads CesiumJS from CDN
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- Initializes globe with OpenStreetMap imagery (no Ion token)
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- Receives tool inputs via the MCP App SDK
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- Handles camera navigation to specified bounding boxes
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## Key Files
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- [`server.ts`](server.ts) - MCP server with geocode and show-map tools
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- [`mcp-app.html`](mcp-app.html) / [`src/mcp-app.ts`](src/mcp-app.ts) - CesiumJS globe UI
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- [`server-utils.ts`](server-utils.ts) - HTTP server utilities
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## Notes
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- Rate limiting is applied to Nominatim requests (1 request per second per their usage policy)
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- The globe works in sandboxed iframes with appropriate CSP configuration
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- No external API keys required - uses only open data sources
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