How to rotate square part of a pixmap 45 degrees?

BlitzMax Forums/BlitzMax Beginners Area/How to rotate square part of a pixmap 45 degrees?

The forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.

Boy! am I out of my element!
I think I can understand about a third of all this pixel-juggling.
But perhaps that's enough to use some of it for my seamless isometric tile code.
Though I wish I could do without rotating the texture, because of the morphing I think will occur when I tilt the seamless tile back on its tip.
But I only know how to make a normal tile seamless, not one that's rotated 45 degrees.
_____________________________________________________________
"enough!" "let's work!" "where's my thinking cap!"
~it's in the well master~
"how did it get there Thar?"
~I dropped it master~
"did you wear the cap at that time Thar?"
~no master~
"AH!"
________from 'Thar's lonely quest' by Mark Hellmson_________