[jdswain]

For anyone wanting to build sprite type code on the Apple II, you really should read this article in Byte magazine:

Preshift-Table Graphics on your Apple by Bill Budge, with Gregg Williams and Rob Moore. A23 Move blocks of pixels across the screen with only 3K bytes of overhead

It's kind of hard to find, it's in the December 1984 Byte magazine, but an additional magazine at the end of the PDF, Bytes Guide to Apple.

At the time this was huge, Bill Budge was probably the most well known game programmer, so getting a look inside how he wrote code was a big thing.

Of course, as mentioned elsewhere, graphics is hard on the Apple II because of the complex memory layout due to Woz wanting to save a few chips. This can be contrasted with the Atari and Commodore computers that had custom chips that made graphics a lot easier.

https://archive.org/details/byte-magazine-1984-12/page/n397/...

[colinlm]

This is the scalable and hard way :) I had no memory pressure issue with this game so I went with preshifted shapes instead (as described in page 4 of https://mirrors.apple2.org.za/ftp.apple.asimov.net/documenta...).