The game's tile art, drawn in code, and the Cauldron2D.Atlas it is installed into.
Every tile is a 16×16 RGBA raster built from FrenchCurve.Draw primitives; no image is
decoded and no asset ships with the game.
Each entry carries three renderings of the same thing, so text and pixel modes cannot drift: the raster, a two-column glyph, and an RGB colour. The glyph is two columns wide because one tile occupies two terminal cells.
Terrain rasters (:rock, :wall, :floor, :door, :console, :gate, :stair) fill
their tile opaquely. Everything that stands on terrain — the player, monsters, items — is
drawn on a transparent background so Cauldron2D.Surface composites it over whichever
floor it is standing on.
The atlas also carries a :dim tint, applied by the renderer to remembered but unlit
tiles.
Example
Scriber.Art.install()
#=> :scriberSummary
Functions
@spec arts() :: [atom()]
Every art name in the catalogue, in drawing order.
@spec dim(Cauldron2D.Atlas.rgba()) :: Cauldron2D.Atlas.rgba()
The :dim tint: one pixel darkened and shifted towards blue.
Scales red by 0.30, green by 0.32 and blue by 0.42, leaving alpha untouched.
@spec install() :: atom()
Draw every tile in the catalogue and install the atlas, returning name/0.
Installation is per-VM and idempotent: a second call finds the atlas already installed and draws nothing. Must be called before any surface using this atlas is rendered.
@spec name() :: atom()
The atlas name install/0 registers under and every caller refers to.