Current i am adding custom palette to my surface chart as:

 surfaceSeries.AutomaticPalette = false;
 surfaceSeries.Palette.Clear();
Color[] FillColors = {      Color.DarkBlue, Color.Blue, Color.MediumBlue,
                             Color.Cyan, Color.LimeGreen,
                             Color.LightGreen, Color.Yellow, 
                             Color.Orange,Color.OrangeRed,
                             Color.Red, Color.PaleVioletRed, Color.DarkRed};

int N = 10;

double increment = (max - min) / N;

surfaceSeries.Palette.Add(min, FillColors[0]);
for (int i = 1; i <= N; i++)
{
    double value = min + ((double)i * increment);
    surfaceSeries.Palette.Add(value, FillColors[i]);
}

It's showing lots of legend in the chart and not the correct drawing as the attached document.

I have tried to get colors of the scale and succeed by the following lines of code:

Color[] allScaleColors = GetRainbowColorMapScaleColors();

private Color[] GetRainbowColorMapScaleColors()
{
    try
    {
        Color[] color = new Color[300];
        int wid = 300;
        for (int x = 0; x < wid; x++)
        {
            color[x] = MapRainbowColor(x, wid, 0);
        }
        return color;
    }
    catch (Exception ex)
    {
        throw ex;
    }
}

// Map a value to a rainbow color.
private Color MapRainbowColor(float value, float red_value, float blue_value)
{
    // Convert into a value between 0 and 1023.
    int int_value = (int)(1023 * (value - red_value) / (blue_value - red_value));

    // Map different color bands.
    if (int_value < 256)
    {
        // Red to yellow. (255, 0, 0) to (255, 255, 0).
        return Color.FromArgb(255, int_value, 0);
    }
    else if (int_value < 512)
    {
        // Yellow to green. (255, 255, 0) to (0, 255, 0).
        int_value -= 256;
        return Color.FromArgb(255 - int_value, 255, 0);
    }
    else if (int_value < 768)
    {
        // Green to aqua. (0, 255, 0) to (0, 255, 255).
        int_value -= 512;
        return Color.FromArgb(0, 255, int_value);
    }
    else
    {
        // Aqua to blue. (0, 255, 255) to (0, 0, 255).
        int_value -= 768;
        return Color.FromArgb(0, 255 - int_value, 255);
    }
}

I need help to map the Scale with the rainbow color map.

Does anyone have any idea and solution for this implementation.



Thanks in advance.