Three new public functions (set_cell_gid, set_roof, save_to_disk)
documented in the README alongside the existing read API. Purely
additive bump — existing consumers continue to compile and run
unchanged.
Update README.md to version 0.2.0: add API entries for the 16 new
public functions (encode_gid, decode_gid, upgrade_v1_to_v2,
validate_map_table_v2, atlas_count, atlas_id_at, has_layer, is_indoor,
cell_gid, tile_at_layer, blocks_walk, blocks_sight,
iterate_layers_pre_entities, iterate_layers_post_entities,
draw_map_pre_entities, draw_map_post_entities), add the schema-v2
reference section documenting layer-stack, packed-u32 GID bit layout,
auto-migration, and a v0.2.0 changelog entry.
Fix tile-id OOB validation regression in build_map_v2: after v1->v2
upgrade, packed GIDs were not checked against atlas palette sizes.
Restore the check in build_map_v2 so loading a map with an out-of-range
tile_id still produces a fatal error with the same message pattern.
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.
