draw_layer now samples tile sub-rectangles from the atlas diffuse
texture via the ADR-0044 source-rect render primitive (13-arg
draw_sprite_transform). load_textures gains a walkable field in
tile-records (from atlas JSON) so gameplay queries work after the
tiles-dir is removed. load_tilemap falls back to an atlas-bootstrap
stub when the legacy tilemap JSON is absent, allowing maps.load to
succeed before load_textures is called. Texture loading uses pcall
to degrade gracefully in headless environments. Bumps lib version to
0.3.0 to flag the breaking change in tile-record shape (id is now
integer, name is the stable string identifier).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Sprite-mode in draw_map:
- tilemap-tiles with texture atlas-id render via
engine.render.draw_sprite_transform with rotation pivot at tile center
- tiles without texture continue to render via draw_rect with color
(Phase 1 mode preserved)
Tile rotation:
- maps support an optional tile_rotations parallel array in the map
JSON with per-cell 90-degree rotation values (0/90/180/270)
- absent or nil entries default to 0 (no rotation)
- enables 9-segment tile reuse via rotation rather than per-orientation
sprites
New API:
- maps.load_textures(asset_aliases) resolves the current tilemap's
tile atlas-ids to texture-handles via the asset-lib indirection
(asset_aliases[tilemap.asset_pack] -> lib-id -> atlas.json lookup
per tile)
Schema additions:
- tilemap.asset_pack (alias-key, optional)
- tile.texture (atlas-id, optional)
- map.tile_rotations (parallel array, optional)
All existing Phase 1 color-only tilemaps render unchanged.
Pre-existing bug: split_namespaced_id used first-dot-split. For modules
with dotted IDs (e.g. lib-core.maps-test), this misclassified
'<dotted-module-id>.<tilemap-name>' as cross-lib reference.
Replaced with split_local_tilemap() that matches by exact current-
module-id prefix. Module-id can now have arbitrary dots.
Surfaced by P.3.1 reference test-module 'lib-core.maps-test' which
has a dotted module-id.
