9 May
2020
9 May
'20
4:01 p.m.
You can save extracting the xparts and yparts by using direct subtraction of pairs and comparing with (0,0) like this:
Aaaargh, no, ignore that, it's nonsense. It's amazing how you can stare at something for minutes but only see the flaw the moment you press send. Sorry for the noise. -- Bruce Horrocks Hampshire, UK