how to generate heat maps given the points

Question

I want to generate a heat map in windows form. I have a set of points as the input. How to go about doing this in the simplest way? Thanks.

Answer 1

This is a fix for Sam's code.

  public Color HeatMapColor(decimal value, decimal min, decimal max)
    {
        decimal val = (value - min) / (max - min);
        int r = Convert.ToByte(255 * val);
        int g = Convert.ToByte(255 * (1 - val));
        int b = 0;

        return Color.FromArgb(255,r,g,b);                                    
    }