A guide to implementing 2D platformers

> Before anything on the scene is stepped, determine whether the character is standing on a moving platform. This can be done by checking, for example, whether his center-bottom pixel is just one pixel above the surface of the platform. If it is, store a handle to the platform and its current position inside the character. I implemented a 2D platformer with moving platforms once; we solved this simply by using another rule in the article — the one for…

One other example of the "bitmask" type of platformer (although you probably wouldn't call it a "platformer", at least not a "jump'n'run" game, as far as the genre is concerned) is Lemmings. The levels of the original Lemmings games are definitely not saved as bitmaps (at 120 levels, that would have far exceeded the capacity of an Amiga floppy), and they're not tile-based either. AFAIK the levels (https://www.mobygames.com/game/amiga/lemmings/screenshots/ga...) were created by repeating certain graphical elements…

I like the idea of a guide like this. Reminds me of “Implementation of Hex Grids,” another high quality game-related guide: https://www.redblobgames.com/grids/hexagons/implementation.h... and before that, “Beej’s Guide to Network Programming”: https://beej.us/guide/bgnet/

Very informative. The use of code examples is a nice touch. I imagine that a lot of novice game developers could benefit from this guide.