# CasEffect

Class · extends [`CameraFrameEffect`](https://api.playcanvas.com/engine/classes/CameraFrameEffect.md) · category: Graphics

Source: https://github.com/playcanvas/engine/blob/64089771243fe28a9b9d2b4de538b99b07c75097/src/extras/effects/cas/cas-effect.js#L24

The sharpening effect, using contrast adaptive sharpening (CAS). This can be used to increase the
sharpness of the rendered image, often to counteract the blurriness of the TAA effect, or of
rendering to a lower resolution render target.

Applied to the scene image, after the fringing and ahead of the other effects.

Every [CameraFrame](https://api.playcanvas.com/engine/classes/CameraFrame.md) constructs and registers one, whose sharpness is set through
[CameraFrame#rendering](https://api.playcanvas.com/engine/classes/CameraFrame.md#rendering), and which is available as `cameraFrame.getEffect('cas')`.

## Constructors

### constructor

```ts
new CasEffect(device: GraphicsDevice)
```

**Parameters**

- `device` ([`GraphicsDevice`](https://api.playcanvas.com/engine/classes/GraphicsDevice.md)): The graphics device.

## Properties

### sharpness

```ts
sharpness: number = 0
```

The sharpening intensity, 0-1 range. Defaults to 0, making it disabled.

## Accessors

### active

```ts
get active(): boolean
```

Gets whether the effect contributes to the frame. A zero sharpness disables it, the
sharpness being the effect's on/off control.

## Methods

### update

```ts
update(): void
```

Applies the effect's parameters. Called by [CameraFrame#update](https://api.playcanvas.com/engine/classes/CameraFrame.md#update) while the effect is
active: set the uniform values with [CameraFrameEffect#setUniform](https://api.playcanvas.com/engine/classes/CameraFrameEffect.md#setuniform) here, and the
defines which depend on the parameters.
Everything it sets is what the frames rendered until the next update use.

## Inherited from [CameraFrameEffect](https://api.playcanvas.com/engine/classes/CameraFrameEffect.md)

- `cameraFrame: CameraFrame | null = null`
- `device: GraphicsDevice`
- `enabled: boolean = true`
- `get cameraExposureScale(): number`
- `get chunkName(): string`
- `get debugViews(): string[]`
- `get defineName(): string`
- `get entryPoint(): string`
- `get glsl(): string | null`
- `get id(): string`
- `get requires(): string[]`
- `get slot(): string | null`
- `get wgsl(): string | null`
- `buildKey(): string`
- `createPasses(resources: CameraFrameEffectResources, passes: CameraFrameEffectPasses): void`
- `destroy(): void`
- `destroyPasses(): void`
- `frameUpdate(frame: CameraFrameEffectContext): void`
- `getChunk(shaderLanguage: string): string | null`
- `resolveScene(scene: CameraFrameEffectScene): void`
- `setDefine(name: string, value: any): void`
- `setUniform(name: string, value: number | number[] | ArrayBufferView<ArrayBufferLike> | Texture): void`