Constants

What the engine carries, asked for by name, by kind.

• FONTS: the fonts a text can name, 'nacatamalon:arcade' first, the one it uses when it names none.
• MUSIC.SONGS: the songs, useLoadSong({ src: 'nacatamalon:' + key }). MUSIC.INSTRUMENTS and MUSIC.SAMPLES: what a song's notes play with @name, and what its sample voices play.
• SOUNDS: the kinds of sound effect renderSfx makes.
• LOOKS: the looks a material can take.
• PALETTES: the colours of the machines that had a fixed list of them, nes, gameBoy and c64, as #rrggbb: for getColor, snapToPalette or a palette of rows. For paletteMatch, useLoadPalette({ src: 'nacatamalon:nes' }).

The names input is read by, and the numbers it starts from.

• GAMEPAD_BUTTONS and GAMEPAD_AXES: what a standard pad's buttons and sticks are called, in order, and GAMEPAD_BUTTON_LABELS / GAMEPAD_AXIS_LABELS how a controls screen shows them.
• POINTER_BUTTONS: main, middle, right, back and forward.
• DEADZONE: how far a stick or a trigger moves before it counts, the pad's and an action's, when nothing says. ACTION_PRESS: how far it moves before an action counts as pressed.
• ACTION_PRESETS: input maps ready to use, so a game does not write its sixteen bindings by hand. By console, nes, genesis, snes and arcade, whose actions are its buttons (a, b, start; button1 to button6 and coin on an arcade), and by kind of game, platformer (jump, action, pause). Every one has up, down, left and right on the arrows, WASD, the d-pad and the left stick; a console's buttons sit on the pad where they sat on its own.

How far the engine goes, fixed by what it draws and simulates with: a game cannot raise them.

• LIGHTS: how many lights shine on one thing drawn, eight, as the consoles of the era had: each model is lit by the eight that reach it most. An ambient light does not count.
• SCENE_LIGHTS: how many a scene holds at a time, thirty-two, which each model takes its eight from. Past them they are dropped with a warning.
• PHYSICS_LAYERS: how many collision layers a scene has, sixteen, the most both physics backends can tell apart.
• PALETTE_COLORS: as many colours as a palette may hold, 256.

Values physics is written with. ALL_LAYERS is every layer at once, what a collider hits unless it says otherwise.

How the engine draws: the renderers createGame can be asked for, which pixels it draws on, and how many numbers one corner of a line takes.

TYPE.WEBGL2 is the same as writing 'WEBGL2' in createGame({ renderer }). PIXEL_SNAP.SCREEN, GAME and OFF are what createGame({ pixelSnap }) and useGame().setPixelSnap take. LINE_VERTEX_FLOATS is seven, where a corner is (x, y, z) and its colour (r, g, b, a), for a game that writes the corners of its lines itself.

The game's screen: what shape it is, and how it sits in its page.

• CONSOLES: each console's screen, its size, the shape of its pixels (pixelAspect) and its pictures a second, to spread into createGame: nes, snes, genesis, gameBoy, gba, ps1 and n64.
• SCALING: how big it is painted in its page, what createGame({ scaling }), fullscreenScaling and useGame().setScaling take: NONE, INTEGER, CONTAIN or FILL.
• KEEP: which sides keep the game's size when the page is another shape, createGame({ keep }): BOTH, WIDTH, HEIGHT or NONE.
• ALIGN: where createGame({ align }) puts it in its container: CENTER, a side (TOP, BOTTOM, LEFT, RIGHT) or a corner (TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT).