initial commit

src/world/MapLoader.lua

@@ -0,0 +1,30 @@
+-- Builds runtime Map objects (and their tile SpriteBatches) from generated
+-- data, cached by map id.
+
+local Map = require("src.world.Map")
+local TileRenderer = require("src.render.TileRenderer")
+
+local MapLoader = {}
+
+local cache = {}
+
+function MapLoader.load(data, mapId)
+  if cache[mapId] then return cache[mapId] end
+  local def = data.maps[mapId]
+  assert(def, "unknown map: " .. tostring(mapId))
+  local tilesetDef = data.tilesets[def.tileset]
+  assert(tilesetDef, "unknown tileset: " .. tostring(def.tileset))
+
+  -- warp tiles are stored per tileset macro name; the generated tilesets
+  -- module carries them in the tileset entry itself
+  local map = Map.new(def, tilesetDef)
+  map.renderer = TileRenderer.new(map)
+  cache[mapId] = map
+  return map
+end
+
+function MapLoader.clearCache()
+  cache = {}
+end
+
+return MapLoader