# PlatformWorld

**Description:**

  A class representing a 2D platformer game world with physics simulations.

**Class Object:** [Platformer.PlatformWorld Class](/docs/api/Class%20Object/Platformer/PlatformWorld).

**Inherits from:** [PhysicsWorld](/docs/api/Class/PhysicsWorld).

## camera

**Type:** Readonly Field.

**Description:**

  The camera used to control the view of the game world.

**Signature:**
```tl
const camera: PlatformCamera
```

## moveChild

**Type:** Function.

**Description:**

  Moves a child node to a new order for a different layer.

**Signature:**
```tl
moveChild: function(self: PlatformWorld, child: Node, newOrder: integer)
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| child | Node | The child node to be moved. |
| newOrder | integer | The new order of the child node. |

## getLayer

**Type:** Function.

**Description:**

  Gets the layer node at a given order.

**Signature:**
```tl
getLayer: function(self: PlatformWorld, order: integer): Node
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| order | integer | The order of the layer node to get. |

**Returns:**

| Return Type | Description |
| --- | --- |
| Node | The layer node at the given order. |

## setLayerRatio

**Type:** Function.

**Description:**

  Sets the parallax moving ratio for a given layer to simulate 3D projection effect.

**Signature:**
```tl
setLayerRatio: function(self: PlatformWorld, order: integer, ratio: Vec2)
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| order | integer | The order of the layer to set the ratio for. |
| ratio | Vec2 | The new parallax ratio for the layer. |

## getLayerRatio

**Type:** Function.

**Description:**

  Gets the parallax moving ratio for a given layer.

**Signature:**
```tl
getLayerRatio: function(self: PlatformWorld, order: integer): Vec2
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| order | integer | The order of the layer to get the ratio for. |

**Returns:**

| Return Type | Description |
| --- | --- |
| Vec2 | The parallax ratio for the layer. |

## setLayerOffset

**Type:** Function.

**Description:**

  Sets the position offset for a given layer.

**Signature:**
```tl
setLayerOffset: function(self: PlatformWorld, order: integer, offset: Vec2)
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| order | integer | The order of the layer to set the offset for. |
| offset | Vec2 | The new position offset for the layer. |

## getLayerOffset

**Type:** Function.

**Description:**

  Gets the position offset for a given layer.

**Signature:**
```tl
getLayerOffset: function(self: PlatformWorld, order: integer): Vec2
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| order | integer | The order of the layer to get the offset for. |

**Returns:**

| Return Type | Description |
| --- | --- |
| Vec2 | The position offset for the layer. |

## swapLayer

**Type:** Function.

**Description:**

  Swaps the positions of two layers.

**Signature:**
```tl
swapLayer: function(self: PlatformWorld, orderA: integer, orderB: integer)
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| orderA | integer | The order of the first layer to swap. |
| orderB | integer | The order of the second layer to swap. |

## removeLayer

**Type:** Function.

**Description:**

  Removes a layer from the game world.

**Signature:**
```tl
removeLayer: function(self: PlatformWorld, order: integer)
```

**Parameters:**

| Parameter | Type | Description |
| --- | --- | --- |
| order | integer | The order of the layer to remove. |

## removeAllLayers

**Type:** Function.

**Description:**

  Removes all layers from the game world.

**Signature:**
```tl
removeAllLayers: function(self: PlatformWorld)
```