Rasagar/Library/PackageCache/com.unity.visualeffectgraph/Documentation~/Operator-PerlinCurlNoise.md

Perlin Curl Noise

Menu Path : Operator > Noise > Perlin Curl Noise

The Perlin Curl Noise Operator allows you to sample a noise value within a specified range in two or three dimensions based on provided coordinates. Perlin curl noise uses similar math to the Perlin Noise Operator, but with the addition of a curl function which allows it to generate a turbulent noise. This resulting noise is incompressible (divergence-free), which means that particles cannot converge to sink points where they get stuck.

A good use case for Curl Noise is emulating fluid or gas simulation, without having to perform complex calculations.

Operator settings

Property	Type	Description
Dimensions	Enum	Specify whether the noise is two, or three dimensional.
Type	Enum	Specify what type of noise to use.

Operator properties

Input	Type	Description
Coordinate	FloatVector2Vector3	The coordinate in the noise field to sample from. The Type changes to match the number of Dimensions.
Frequency	Float	The period in which Unity samples the noise. A higher frequency results in more frequent noise change.
Octaves	Int	The number of layers of noise. More octaves create a more varied look but are also more resource-intensive to calculate.
Roughness	Float	The scaling factor Unity applies to each octave. Unity only uses roughness when Octaves is set to a value higher than 1.
Lacunarity	Float	The rate of change of the frequency for each successive octave. A lacunarity value of 1 results in each octave having the same frequency.
Amplitude	Float	The magnitude of the noise. A higher value increases the range of values the Noise port can return.

Output	Type	Description
Noise	Float	The noise value at the coordinate you specify.