Cycling Colors rbg

[bellend]

Hi there,

i was wondering if someone could help advise me to the best approach for this problem.

I have an interactive thing thast leaves a lind trail but id like to cycle the colours depending on the percetage loaded.

How can i start from

r:0
b:0
g:0

and ease through the colour spectrum until

r:255;
b:255;
g:255;

I tired a few things but i seem to just be getting grayscale.

Apprecite your time.

Ronson.

[Martin Munoz]

You can't do that within the RGB color space very easily. You can use the HSV color space instead, keep S and V constant while changing the H linearly and then converting back to RGB.

Check this out: http://natecook.com/downloads/color.html

[joshstrike]

well, this is sort of a stab in the dark, but it seems if you set your saturation and brightness beforehand you can calculate the minimum remaining amounts, then it's just a matter of cycling one value up, then the next up, then the last down, ad infinitum...I haven't tested this code, this is off the top of my head, but I think something like this should work...

var sat:Number = 90;
var bri:Number = 90;
var minAmt:Number = sat*.256
var maxAmt:Number = (256-(bri*.256));
var rgb:Array = [maxAmt,minAmt,minAmt];
var currentShift:Number = 0;

//then within your timer event, or enterframe, or whatever...
if (rgb[currentShift%2]<maxAmt) {
   rgb[currentShift%2]+=1;
} else {
   rgb[(currentShift-1)%2]-=1;
   if (rgb[(currentShift-1)%2]<minAmt) {
	   currentShift++;
  }
}