OpenEuphoria

Re: Proceeding apace...

• Posted by simulat <simulat at INTERGATE.BC.CA> Mar 23, 2000
• 543 views

> ... but still getting stuck on issues with the fill routine.
Hi Jeff
This is pretty vague, but I remember some sort of odd/even rule that was
used for fills:
Start at the screen edge at the top
If you are inside the your fill area at the start then
    start with the fill color turned on,
    otherwise off.
When you hit a boundary between the fill zone and the non fill zone, toggle
the fill color.

 Basically, an even number of boundary jumps means that the pixel colour is
the same as the screen edge, and an odd number of jumps means that the pixel
colour is the opposite of the screen edge. So basically, you just do a
raster scan of all the pixels, toggling the fill colour whenever the
boundary colour is encountered.

Bye
Martin