---
title: GKPerlinNoiseSource
framework: gameplaykit
role: symbol
role_heading: Class
path: gameplaykit/gkperlinnoisesource
---

# GKPerlinNoiseSource

A procedural noise generator whose output is a type of fractal coherent noise resembling natural phenomena such as clouds and terrain.

## Declaration

```swift
class GKPerlinNoiseSource
```

## Overview

Overview Like all GKNoiseSource subclasses, a Perlin noise source represents a noise generation algorithm and its parameters. To make use of a noise source, first create GKNoise object from it (and optionally apply operations to that noise object or combine it with other noise objects). Then create a GKNoiseMap object from your noise object, generating a concrete field of values that you can sample from directly or visualize using the SKTexture or SKTileMap class.

## Topics

### Creating a Noise Source

- [init(frequency:octaveCount:persistence:lacunarity:seed:)](gameplaykit/gkperlinnoisesource/init(frequency:octavecount:persistence:lacunarity:seed:).md)

### Managing Noise Generation Parameters

- [persistence](gameplaykit/gkperlinnoisesource/persistence.md)

## Relationships

### Inherits From

- [GKCoherentNoiseSource](gameplaykit/gkcoherentnoisesource.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Procedural Noise

- [GKNoiseSource](gameplaykit/gknoisesource.md)
- [GKNoise](gameplaykit/gknoise.md)
- [GKNoiseMap](gameplaykit/gknoisemap.md)
- [GKCoherentNoiseSource](gameplaykit/gkcoherentnoisesource.md)
- [GKBillowNoiseSource](gameplaykit/gkbillownoisesource.md)
- [GKRidgedNoiseSource](gameplaykit/gkridgednoisesource.md)
- [GKVoronoiNoiseSource](gameplaykit/gkvoronoinoisesource.md)
- [GKCylindersNoiseSource](gameplaykit/gkcylindersnoisesource.md)
- [GKSpheresNoiseSource](gameplaykit/gkspheresnoisesource.md)
- [GKCheckerboardNoiseSource](gameplaykit/gkcheckerboardnoisesource.md)
- [GKConstantNoiseSource](gameplaykit/gkconstantnoisesource.md)