Patch to remove Mandelbrot example

Author: mthalman

patches/spectre-console/0002-Remove-Mandelbrot-example-due-to-license.patch

@@ -0,0 +1,103 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Matt Thalman <mthalman@microsoft.com>
+Date: Wed, 3 Jan 2024 16:14:20 -0600
+Subject: [PATCH] Remove Mandelbrot example due to license
+
+Backport: https://github.com/spectreconsole/spectre.console/pull/1426
+---
+ examples/Console/Canvas/Mandelbrot.cs | 86 ---------------------------
+ 1 file changed, 86 deletions(-)
+ delete mode 100644 examples/Console/Canvas/Mandelbrot.cs
+
+diff --git a/examples/Console/Canvas/Mandelbrot.cs b/examples/Console/Canvas/Mandelbrot.cs
+deleted file mode 100644
+index da804a4..0000000
+--- a/examples/Console/Canvas/Mandelbrot.cs
++++ /dev/null
+@@ -1,86 +0,0 @@
+-/*
+-Ported from: https://rosettacode.org/wiki/Mandelbrot_set#C.23
+-Licensed under GNU Free Documentation License 1.2
+-*/
+-
+-using System;
+-using Spectre.Console;
+-
+-namespace Canvas;
+-
+-public static class Mandelbrot
+-{
+-    private const double MaxValueExtent = 2.0;
+-
+-    private struct ComplexNumber
+-    {
+-        public double Real { get; }
+-        public double Imaginary { get; }
+-
+-        public ComplexNumber(double real, double imaginary)
+-        {
+-            Real = real;
+-            Imaginary = imaginary;
+-        }
+-
+-        public static ComplexNumber operator +(ComplexNumber x, ComplexNumber y)
+-        {
+-            return new ComplexNumber(x.Real + y.Real, x.Imaginary + y.Imaginary);
+-        }
+-
+-        public static ComplexNumber operator *(ComplexNumber x, ComplexNumber y)
+-        {
+-            return new ComplexNumber(x.Real * y.Real - x.Imaginary * y.Imaginary,
+-                x.Real * y.Imaginary + x.Imaginary * y.Real);
+-        }
+-
+-        public double Abs()
+-        {
+-            return Real * Real + Imaginary * Imaginary;
+-        }
+-    }
+-
+-    public static Spectre.Console.Canvas Generate(int width, int height)
+-    {
+-        var canvas = new Spectre.Console.Canvas(width, height);
+-
+-        var scale = 2 * MaxValueExtent / Math.Min(canvas.Width, canvas.Height);
+-        for (var i = 0; i < canvas.Height; i++)
+-        {
+-            var y = (canvas.Height / 2 - i) * scale;
+-            for (var j = 0; j < canvas.Width; j++)
+-            {
+-                var x = (j - canvas.Width / 2) * scale;
+-                var value = Calculate(new ComplexNumber(x, y));
+-                canvas.SetPixel(j, i, GetColor(value));
+-            }
+-        }
+-
+-        return canvas;
+-    }
+-
+-    private static double Calculate(ComplexNumber c)
+-    {
+-        const int MaxIterations = 1000;
+-        const double MaxNorm = MaxValueExtent * MaxValueExtent;
+-
+-        var iteration = 0;
+-        var z = new ComplexNumber();
+-        do
+-        {
+-            z = z * z + c;
+-            iteration++;
+-        } while (z.Abs() < MaxNorm && iteration < MaxIterations);
+-
+-        return iteration < MaxIterations
+-            ? (double)iteration / MaxIterations
+-            : 0;
+-    }
+-
+-    private static Color GetColor(double value)
+-    {
+-        const double MaxColor = 256;
+-        const double ContrastValue = 0.2;
+-        return new Color(0, 0, (byte)(MaxColor * Math.Pow(value, ContrastValue)));
+-    }
+-}