---
title: "Top-down world: API"
package: "@phaser-ae/world-topdown"
tier: Free
version: 3.0.0-5
released: 2026-10-14
updated: 2026-10-20
description: "The 2D world for games seen from above, where objects draw by where their feet are, so characters walk behind trees with no sorting code."
url: https://phaser.io/packs/world-topdown/api
site: Phaser - https://phaser.io
---

# Top-down world: API

`@phaser-ae/world-topdown` — A 2D top-down world: y-sorted depth so things walk behind things, pan/zoom camera with bounds.

## The pack

### `topdown`

```ts
function topdown(opts: TopdownOptions = {}): Pack<{ world: World2dApi }>
```

The top-down world pack: within a layer, things sort by their FEET (y + half the scaled height + z), so the player walks behind the tree. Installs the 2D camera; registers the world with the kernel.

## Types

### `TopdownOptions`

```ts
interface TopdownOptions
```

Manifest options.

- `layers?: LayerName[]` — Draw layers, back to front. Default ['floor', 'world', 'fx'].
- `wrap?: Wrap` — A toroidal world of this size (world units): positions, drawing, camera, queries and collision all wrap. Game code never wraps a coordinate. Default none.

### `World2dApi`

```ts
interface World2dApi
```

`game.world` for either 2D world kind.

- `readonly kind: 'topdown' | 'side'` — Which 2D world this is.
- `readonly layers: ReadonlyArray<LayerName>` — The layer names, back to front. Spawning into any other name throws.
- `toWorld(sx: number, sy: number): { x: number; y: number }` — Screen (logical pixels) to world, through the camera.
- `toScreen(wx: number, wy: number): { x: number; y: number }` — World to screen (logical pixels), through the camera.
- `readonly wrap: Wrap | null` — The wrap size, or null. Read it for spawning at the edges; never wrap a coordinate yourself.
- `readonly view: { x: number; y: number; w: number; h: number; cx: number; cy: number }` — What the camera is looking at right now, in world units. Derived every read, so it is never a frame behind.
- `vw(f: number): number` — The world x a fraction across the view: 0 the left edge, 1 the right. Camera-aware, so `vw(0.5)` is always the middle of the screen.
- `vh(f: number): number` — The world y a fraction down the view: 0 the top, 1 the bottom.

---

## For AI agents: Phaser AE

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