zCosVariation.cs

using System;
 
namespace Waher.Script.Fractals.IFS.Variations.ComplexVariations
{
    public class ZCosVariation : FlameVariationZeroParameters
    {
        public ZCosVariation(int Start, int Length, Expression Expression)
            : base(Start, Length, Expression)
        {
        }
 
        public override void Operate(ref double x, ref double y)
        {
            double Mod = Math.Exp(-y);
            double zr = Mod * (Math.Cos(x));
            double zi = Mod * (Math.Sin(x));
 
            Mod = Math.Exp(y);
            zr += Mod * Math.Cos(-x);
            zi += Mod * Math.Sin(-x);
 
            x = zr * 0.5;
            y = zi * 0.5;
        }
 
        public override string FunctionName => nameof(ZCosVariation);
    }
}