On Sat, Mar 21, 2015 at 3:41 AM, Ben Coman <btc@openinworld.com> wrote:Do we need to do something for Pharo 4? And what is the simplest/quickest thing that would work - even if it needs revisiting in Pharo 5?The most simple that works is to at least set alpha to any value.Slice is in inbox (15188)
- Multiplication - alpha doesn't change
- Division - alpha doesn't change
- Addition - (color1 apha + color2 alpha) min: 1.0 - simple addition and check to not allow alpha to overcome max value
- Subtraction - if two colors are the same alpha becomes 0, otherwise we take alpha of message receiver (minuend)
Cheers,Alex