# sporel-module-map-editor

Interactive map editor for v2 Sporel map files. Click-to-paint, vertical layer-chip overlay on the left edge, collapsible atlas+tile picker bottom-left.

## Run

Default — edit the module's in-place work map:

```bash
bash scripts/run-map-editor.sh
```

With a target — copy a real map in, edit, copy back out:

```bash
bash scripts/run-map-editor.sh ~/Projects/Sporel/sporel-modules/spine-prototype/maps/demo.map.json
```

## UI

- **Layer chips** (left edge, vertical): top-of-stack down. `Rf` at top toggles roof-edit mode; the other eight chips select the active layer.
  - **Left-click** = set active layer (or toggle roof mode)
  - **Right-click** = toggle layer visibility (Rf chip ignores right-click)
- **Atlas + tile picker** (bottom-left): collapsed chip shows the active tile. Click to expand; click again or outside to collapse.
- **Status chip** (bottom-right): current mouse-cell coordinate plus a `*` when the map has unsaved changes.

## Hotkeys

| Key | Action |
|---|---|
| `Left click` on map | Paint cell with active tile (or set roof flag in roof-mode) |
| `E` | Erase the cell under the mouse |
| `R` | Cycle rotation 0 → 1 → 2 → 3 → 0 |
| `S` | Save to disk (overwrites the work map) |
| `Esc` | Quit |

## Limitations (v0.1.0)

- Tile thumbnails in the picker render as gray placeholders with tile-IDs as text — lib-core.maps v0.4.0 does not expose per-tile UVs to Lua, so visual thumbnails are a v0.2.0 task.
- Atlas list in the picker is purely informational; if a map declares multiple atlases, the active atlas is set from `state.lua` defaults at startup and cannot yet be switched via UI (v0.2.0 hit-tests inside the expanded picker).
- Engine bindings `engine.render.draw_rect_lines` and `engine.render.draw_line` are not yet registered — active-chip borders, hidden-layer strikethroughs, and the entity-slot divider will trigger runtime errors when their code paths execute. Adding the bindings is a small engine-side follow-up.
- No undo/redo, no multi-tile brush, no entity placement, no heightmap editing — see the design spec §1 for the full out-of-scope list.

## Spec

`docs/superpowers/specs/2026-05-23-sporel-module-map-editor-design.md` in the `sporel-meta` repo.