Hi Guys,

I'm trying to do some work with colours (RGB values, etc...).

The control that I have returns an integer and I have found a function that converts the integer into separate red, green and blue values.

But it isn't working.

The function I found is...

input colourvalue.

redvalue = colourvalue MOD 256.
greenvalue = (colourvalue / 256) MOD 256.
bluevalue = (colourvalue / 256 / 256) MOD 256.

This seems to almost work but not quite.

I have put the same formulae into Excel to check it is working correctly and it does.

For instance, when I click a cyan like colour RGB(0,255,255). The int returned is 16776960. Excel turns this into 0,255,255 but my program thyinks it is 0,255,0.

Simililarly when I select white, Excel says it is 255,255,255 but my program thinks it is 255,0,0.

Not sure what could be going on here.

Any ideas?!

Woohoo!

Truncate is your freind!

Stupid thing

I'd check the double-division for the blue one and add some extra brackets to be safe/clear.

That's what I thought is might be but it's down to rounding. The program was being too clever and turning 255.56738239... into 256. I needed to truncate instead.