On Fri, Jul 10, 2009 at 12:42 AM,
On Thu, 9 Jul 2009, roconnor@theorem.ca wrote:
You can use by lib without worrying about the CIE. You can use my library without ever importing or using the word CIE. However, the CIE stuff is there for those who need it.
Perhaps I (maybe with some help) need to make a tutorial on the haskell wiki to try to make it less intimidating.
Okay, I threw together a quick introduction at http://www.haskell.org/haskellwiki/Colour. Any changes, comments, corrections, and addtions are welcome. It's a wiki!
The word CIE does occur at all in the document.
I read this and it irks me that opaque is not a monoid homomorphism despite being the natural injection of non-transparent colours into semi-transparent colours with pureColour being the projection back. [Incidentally, you have a typo in pureColour, ac `over` mempty should be ac `over` black or opaque black presumably, or even opaque mempty, which I think was what you were going for, illustrating my point.] It's like defining mappend on Integers as (+) and on Reals as (*); actually, I think this is very close to what is actually happening.