Altar

Based on game build 714014 | Last updated: 2026-02-28

Overview

This file defines the static layout for the Altar map segment, used to generate structured areas in the game world (specifically in the Ruins). It is a Tiled map file exported as Lua, containing tile layer data (BG_TILES) and an object group (FG_OBJECTS) that specifies where prefabs (e.g., nightmarelight, ancient_altar_spawner, bishop_nightmare_spawner, sacred_chest, wall_ruins) should be spawned. This component does not define a game entity or component in the ECS; rather, it is a data blueprint consumed by the world generation system to instantiate structural and gameplay elements in the game world.

Usage example

This file is not instantiated directly as an ECS component. Instead, the world generation system loads and processes this layout during level construction:

-- Pseudo-example: How the game loads and uses the layout (not part of the file itself)
local layout = require("map/static_layouts/altar")
for _, obj in ipairs(layout.layers.FG_OBJECTS.objects) do
    if obj.type == "ancient_altar_spawner" then
        inst.world:SpawnPrefab("ancient_altar", {x = obj.x, y = obj.y})
    end
end

Dependencies & tags

Components used: None — this is a pure data file with no runtime logic or component instantiation.

Tags: None — no tags are added or checked.

Properties

This file exports a single Lua table with the following top-level properties:

Property	Type	Default Value	Description
version	string	"1.1"	Tiled export version.
luaversion	string	"5.1"	Lua version used for encoding.
orientation	string	"orthogonal"	Map orientation type.
width	integer	48	Map width in tiles.
height	integer	48	Map height in tiles.
tilewidth	integer	16	Width of each tile in pixels.
tileheight	integer	16	Height of each tile in pixels.
properties	table	{}	Map-level custom properties (empty here).
tilesets	table	—	Array of tileset definitions (used for rendering background tiles).
layers	table	—	Array of layers: one tile layer (BG_TILES) and one object group (FG_OBJECTS).

The layers array contains:

• A tilelayer named "BG_TILES" with encoding = "lua" and a large numeric array representing tile IDs.
• An objectgroup named "FG_OBJECTS" with an array of object definitions.

Object properties (in FG_OBJECTS.objects)

Each object in FG_OBJECTS.objects has:

Property	Type	Description
name	string	Usually empty.
type	string	Prefab or spawner type (e.g., "nightmarelight", "ancient_altar_spawner", "sacred_chest").
shape	string	"rectangle" (used for Tiled compatibility).
x, y	integer	Coordinates in pixels (note: values like 461 indicate sub-tile positioning).
width, height	integer	Typically 0 — not used for placement size.
visible	boolean	Always true.
properties	table	Optional key-value pairs (e.g., ["data.health.percent"] = "1.0" for wall health).

Main functions

This file contains no executable functions or methods — it is a static data structure.

Events & listeners

No events or event listeners are defined in this file.