got a scaling window going, yay

[eniko@mastodon.gamedev.place]

@nicklockwood it's harder to write a generic dynamically sized hierarchical system that's also fully optimized. also, at 32x32 even at 8k resolution that's only 240x135 meta tiles, so i'm not sure it has a ton of advantage

[eniko@mastodon.gamedev.place]

@nicklockwood it's just bilinear interpolation. the way it works is that vertices can have any number of interpolated attributes, so in gouraud it has r, g, and b attributes. in flat color mode it doesn't actually step the attributes at all and just pipes the color value straight through

[eniko@mastodon.gamedev.place]

@bnut a simpler optimization would be to count left sided vs right sided verts and switch iteration direction based on that

[eniko@mastodon.gamedev.place]

ok ok one more. i'm checking right sidedness by counting vertices on the right side of the bounding box center, and if it is a right sided triangle i change the horizontal tile iteration from left-to-right to right-to-left

so now the left image's triangle doesn't do a bunch of extra work

[jens@social.finkhaeuser.de]

@eniko This reminds me so much of a book I still have somewhere with assembly drawing routines from the demo scene of the late 90s.

Pro: taught me how to rasterize a curved line.

Con: I forgot everything.

I also don't remember the target platform.