Recent content by ab3ap

I've been caught showing up to class without doing the assigned reading - thanks, AndyG, for the useful links that I somehow missed!

It took a little (re!)-Googling to find, but not long ago I came across a Spirograph in Python page: https://www.101computing.net/python-turtle-spirograph/ It also provides a short mathematical overview. Maybe a helpful starting point and no doubt more pages are out there.

In an undergrad graphics course, three major sets of coordinate systems were used: world (actual 3d measured positions and dimensions of objects), normalized (3d projection onto device independent coords), and finally device coordinates. A transformation matrix is built up to do it all, and the...

I don't immediately understand the idea of two graphical units, so will definitely look into BBC BASIC, thanks! :-) - Mike, still unsure why retro computing is this much fun...

Very nice, thanks for sharing!

GK2001, both programs present a surface of revolution in slices, so probably the main differences are the expression for the surface and the slice stagger for the 3d look. I hope you'll share your code when you're done! I only just this week got a trs-80 emulator running (sdltrs) after chasing...

In another group, a 1981 ad was posted where MTU improves PET graphics. I don't know why, but the short program presented in the ad fascinated me for a few days. For any interested, my little explorations converting it to python are at https://udel.edu/~mm/hat Mike