One of the demos I’ve carried across nearly all the platforms I’ve worked on is the rotating cube demo, typically with back-face culling (hidden line/face removal), perspective, and fast integer maths. The code has been ported to the Gameboy, CPC, PC, Atari ST and Scratch. On more capable systems I usually add filled-in polygons with simple texture mapping and Gouraud shading I first wrote this demo around 30-odd years ago for the Spectrum, and I …
A sprite is the name given to any object that can move around the screen. More powerful home computers had hardware sprites and did not suffer from attribute clashes. Spectrum games, on the other hand, tended to be mostly monochrome, and it was up to the developer to draw sprites on the screen. Sprites in early games would tend to merge in with the backgrounds; Jet Pac and Manic Miner are good examples of games …
I’ve started sections on the Spectrum hardware (just the keyboard and memory map for the moment) plus an assembly language primer, including a section on boolean algebra. It’s been a bit heavy going today, so to reward you, here is that picture of a laughing goat I promised you. Keep reading; this blog will be updated on a regular basis!
