Akhrameev

class UDvars {
    
    var AppLaunch: Int = UserDefaults.standard.object(forKey: "AppLaunch") as? Int ?? 0 {
        didSet {
            UserDefaults.standard.set(AppLaunch, forKey: "AppLaunch")
        }
    }
    
    var Bool: Bool = UserDefaults.standard.object(forKey: "Bool") as? Bool ?? false {
        didSet {

Akhrameev

// http://blog.human-friendly.com/drawing-images-from-pixel-data-in-swift
// https://github.com/FlexMonkey/MetalReactionDiffusion/blob/1ea9aa4a841d20e0b247505fdf716cd5fe1a01fd/MetalReactionDiffusion/ViewController.swift

public struct PixelData {
    var a:UInt8 = 255
    var r:UInt8
    var g:UInt8
    var b:UInt8
}