- Add `layers` dict parameter to Grid constructor for explicit layer definitions
- `layers={"ground": "color", "terrain": "tile"}` creates named layers
- `layers={}` creates empty grid (entities + pathfinding only)
- Default creates single TileLayer named "tilesprite" for backward compat
- Implement dynamic GridPoint property access via layer names
- `grid.at(x,y).layer_name = value` routes to corresponding layer
- Protected names (walkable, transparent, etc.) still use GridPoint
- Remove base layer rendering from UIGrid::render()
- Layers are now the sole source of grid rendering
- Old chunk_manager remains for GridPoint data access
- FOV overlay unchanged
- Update test to use explicit `layers={}` parameter
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Implement per-layer dirty tracking and RenderTexture caching for
ColorLayer and TileLayer. Each layer now maintains its own cached
texture and only re-renders when content changes.
Key changes:
- Add dirty flag, cached_texture, and cached_sprite to GridLayer base
- Implement renderToTexture() for both ColorLayer and TileLayer
- Mark layers dirty on: set(), fill(), resize(), texture change
- Viewport changes (center/zoom) just blit cached texture portion
- Fallback to direct rendering if texture creation fails
- Add regression test with performance benchmarks
Expected performance improvement: Static layers render once, then
viewport panning/zooming only requires texture blitting instead of
re-rendering all cells.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Implements ColorLayer and TileLayer classes with z_index ordering:
- ColorLayer: stores RGBA color per cell for overlays, fog of war, etc.
- TileLayer: stores sprite index per cell with optional texture
- z_index < 0: renders below entities
- z_index >= 0: renders above entities
Python API:
- grid.add_layer(type, z_index, texture) - create layer
- grid.remove_layer(layer) - remove layer
- grid.layers - list of layers sorted by z_index
- grid.layer(z_index) - get layer by z_index
- layer.at(x,y) / layer.set(x,y,value) - cell access
- layer.fill(value) - fill entire layer
Layers are allocated separately from UIGridPoint, reducing memory
for grids that don't need all features. Base grid retains walkable/
transparent arrays for TCOD pathfinding.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
John McCardle