Super Mario 64 ported to the GBA [video]

youtube.com

25 points·bpierre··9 comments

Interesting work.

Funny. I kinda remember this feel of like... polygons moving in the wrong direction? From some old games. Is that some artifact from some sort of math shortcut maybe?

Edit: The game looks way better without textures like shown in the video. I guess the author could maybe mix textures and no-textures to remove some of the "wrong way"-ness. I believe the original SM64 smeared textures silly big on e.g. grass on bigger maps to hide the limitations of the platform, making a nice cartoonish look.

Maybe. Here's doom running on different values of pi (it was ever so slightly incorrect in the original version) https://www.youtube.com/watch?v=_ZSFRWJCUY4

Isn't pi always slightly incorrect in a computer?

its exact value can expressed pretty simply: π

Okay, now go do calculations for a game's rendering using that. Show me the code.

yes, you can only represent it to a certain number of decimal points I guess, for speed. This was typed in incorrectly though.

Yes, but not necessarily enough for the error to cross pixel boundaries, or at least more than a pixel. So while incorrect, it would be hardly, if at all, noticed.

looks like affine texture mapping, which tends to warp at edges especially. It's a linear interpolation without factoring in perspective, so it's faster but often wrong.

It's from the affine texture mapping and lack of floating point maths in the GBA. Same problems as the original PlayStation.

Reply on news.ycombinator.com