Verlauf mit "gewichteter" Farbe mittels Log?

[jfheins]

Ich hätte da auch was im Angebot

Code:

namespace Test_1
{
    public partial class Form1 : Form
    {
        double potenz;
        Color col1;
        Color col2;

        public Form1()
        {
            InitializeComponent();

            col1 = Color.Red;
            col2 = Color.Blue;
            potenz = 1;
        }

        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            double pos = 0;
            double amount = 0;
            Color tempColor;
            Pen myPen = new Pen(col1);

            for (int i = 0; i < pictureBox1.Width; i++)
            {
                pos = (double)i / (pictureBox1.Width - 1);
                amount = 1 - Math.Pow(pos, potenz);
                // 1 - Weil wir den Betrag der ersten Farbe haben wollen
                tempColor = MixColors(col1, col2, amount);

                myPen.Color = tempColor;

                e.Graphics.DrawLine(myPen, new Point(i, 0), new Point(i, pictureBox1.Height - 1));
            }
        }

        private Color MixColors(Color col1, Color col2, double amount)
        {
            if (amount < 0 || amount > 1)
                throw new ArgumentOutOfRangeException("amount");

            byte R = (byte)(col1.R * amount + col2.R * (1 - amount));
            byte G = (byte)(col1.G * amount + col2.G * (1 - amount));
            byte B = (byte)(col1.B * amount + col2.B * (1 - amount));

            return Color.FromArgb(R, G, B);
        }

        private void trackBar1_ValueChanged(object sender, EventArgs e)
        {
            potenz = Math.Pow(1.1, trackBar1.Value);
            label1.Text = String.Format("Potenz: {0:F3}", potenz);
            pictureBox1.Invalidate();
        }
    }
}