ULearn "Dragon Curve" practic

using System.Drawing;
using System;
using static System.Math;

namespace Fractals
{
    public class PointD
    {
        public double X { get; set; }
        public double Y { get; set; }

        public PointD(double x, double y)
        {
            X = x;
            Y = y;
        }
    }

    internal static class DragonFractalTask
    {
        public static void DrawDragonFractal(Pixels pixels, int iterationsCount, int seed)
        {
            var transforms = new Action<PointD>[2] { Transform1, Transform2 };
            var random = new Random(seed);
            var currentPoint = new PointD(1d, 0d);

            for (var i = 1; i <= iterationsCount; i++)
            {
                transforms[random.Next(0,2)]?.Invoke(currentPoint);
                pixels.SetPixel(currentPoint.X, currentPoint.Y);
            }
        }

        private static void Transform1(PointD point)
        {
            var angle45 = PI / 4;
            var xTemp = (point.X * Cos(angle45) - point.Y * Sin(angle45)) / Sqrt(2);
            var yTemp = (point.X * Sin(angle45) + point.Y * Cos(angle45)) / Sqrt(2);
            point.X = xTemp;
            point.Y = yTemp;
        }

        private static void Transform2(PointD point)
        {
            var angle135 = 3*(PI / 4);
            var xTemp = ((point.X * Cos(angle135) - point.Y * Sin(angle135)) / Sqrt(2)) + 1;
            var yTemp = (point.X * Sin(angle135) + point.Y * Cos(angle135)) / Sqrt(2);
            point.X = xTemp;
            point.Y = yTemp;
        }
    }
}