[SOLVED]: Retro pixel-quantized platform engine using loops

Valerien at such small sizes, where a character is 16x16px (or an even cooler 8x8), you absolutely can't rely on +/-0.5px

Why would you call it framerate dependent? It clearly isn't, dt is taken into account during the loop. Check it yourself by making the timescale = 0

I'm not ignoring C2's collision polys, I'm using them.

Also, I'd like to see a movement with pixel rounding using the default platform behavior. Can you show me?

All my experiments result in jerky movement

By the way the main fix of this engine is the platform behavior's floor gap problem. There's hacky solutions to it, like spawning a wall in front of you, but they don't always work and have problems with corners.

In this custom engine there's no code to make you "climb" back on a platform if you're already falling, and there is some code to make sure that you fall no matter how small the gap is, before drawing. And integer positions make sure that there won't be a +/- 0.5 pixels obstructing your fall

Yes it's true, that error margin does matter. Sorry, I wrote back before testing!

[quote:qd88t66j]In this custom engine there's no code to make you "climb" back on a platform if you're already falling, and there is some code to make sure that you fall no matter how small the gap is, before drawing. And integer positions make sure that there won't be a +/- 0.5 pixels obstructing your fall

It's true, though what I meant is that when you design a platformer, you don't absolutely have to make the character the exact size of one of your tilemap's cell. So I doubt that Ashley will add a unique behavior for this specific kind of game.

Well, even well-designed platformers with plenty of space between the gaps have this problem. A 10-pixel sprite clearing a 16-pixel gap is not minor, it's a big headache.

Have a look:

My engine removes guesswork, that's all. I'd be very happy if you could find a way to do the exact same without using loops. Please feel free to try

christina do you still have the file? seems like Dropbox deleted it

Fabian Luarte yes of course:

here:

https://drive.google.com/file/d/0B6_Uw_-Ku5yISnlPNG9URXIxcVE/view?usp=sharing

I also updated the link on the first page.