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Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	/Samples/MobileStarterContent/**
	/Samples/PixelStreaming/**
	/Samples/StarterContent/**
	/Templates/**
	/FeaturePacks/**
	/Engine/Source/Developer/Datasmith/**
	/Engine/Source/Programs/Enterprise/**
	/Engine/Source/Programs/SwitchboardListener/**
	/Engine/Source/Runtime/Datasmith/**
	/Engine/Plugins/AI/UE4ML/**

	//==============================================================================================================================
	// An optimized AMD FSR 1.0 implementation for Mobiles
	// EASU and RCAS are combined in a single pass.
	// Based on https://github.com/GPUOpen-Effects/FidelityFX-FSR/blob/master/ffx-fsr/ffx_fsr1.h
	// Details can be found: https://atyuwen.github.io/posts/optimizing-fsr/
	// Distributed under the MIT License. Copyright (c) 2021 atyuwen.
	// -- FsrEasuSampleH should be implemented by calling shader, like following:
	// AH3 FsrEasuSampleH(AF2 p) { return MyTex.SampleLevel(LinearSampler, p, 0).xyz; }
	//==============================================================================================================================
	void FsrMobile(

	#include <cmath>
	#include <concepts>

	#define Float double

	namespace fmath {

	constexpr Float pi = 3.141592653589793;

	template <std::floating_point T>

	using UnityEngine;

	[RequireComponent( typeof(Camera) )]
	public class FlyCamera : MonoBehaviour {
	public float acceleration = 50; // how fast you accelerate
	public float accSprintMultiplier = 4; // how much faster you go when "sprinting"
	public float lookSensitivity = 1; // mouse look sensitivity
	public float dampingCoefficient = 5; // how quickly you break to a halt after you stop your input
	public bool focusOnEnable = true; // whether or not to focus and lock cursor immediately on enable

	param(
	[string]$DestPath = "",
	[string]$GroupName = ""
	)

	if ([string]::IsNullOrEmpty($DestPath)) {
	Write-Host "Destinationpath path is empty.";
	return;
	}

	// read the PDF about this if you precompute it! it's got helpful info!

	// can be optimized into lut (compute can gen it)
	float GTTonemap(float x) {
	float m = 0.22; // linear section start
	float a = 1.0; // contrast
	float c = 1.33; // black brightness
	float P = 1.0; // maximum brightness
	float l = 0.4; // linear section length
	float l0 = ((P-m)*l) / a; // 0.312