Extract colour gradient pixel information

Question

I am attempting to control a 240 long line of RGB pixels (ws2812b) using an artnet to dmx controller and need to generate colour gradients down the length of the line of pixels.

Answer 1

What you could do is let the brush draw a line on a bitmap and extract the pixels from that, but I believe that would be unnecessarily expensive and complicated. What would be better is simply lerping between the colours you want.

This can be achieved by writing a lerp method like so:

float Lerp(float from, float to, float amount)
{
    return from + amount * (to - from);
}

and using this for the R G and B values of the colors you want to lerp between. For example:

Color Lerp(Color from, Color to, float amount)
{
    return Color.FromArgb(
        (int)Lerp(from.R, to.R, amount),
        (int)Lerp(from.G, to.G, amount),
        (int)Lerp(from.B, to.B, amount));
}

I hope this helps.
~Luca