implicit surface hello world in uxn tal

[davehorner]

https://youtu.be/UxGxsGnbyJ4?si=MNEOVBV5cIzXvmED&t=1155 Raven's author has a cool implicit surface video. now how to implement the hello world eval map in tal...and compute implicit surfaces of orca grids...

I shared this in the #orca chat. I would love to know how to do the 2d eval map of the white/black image. is that something I can do with fidget? Given the talk its possible with a lot of work I could work backwards; but it seems you've provided the code and may be easier to ask you. rust or tal works fine for me. would love to hear your thoughts and generate my own maps.

[mkeeter]

There's a rasterization example in the docs at https://docs.rs/fidget/latest/fidget/#rasterization , is this what you're looking for?

Fidget is totally unrelated to uxn; I think it would be hard to do implicit surface evaluation without floating-point operations!

[davehorner]

What did you use to create the evaluation map over the hello world? I will take a look at the rasterization code, but I think that wont produce the hello world image displayed at t=1155

I didn't realize no floating point in uxn...so I guess that answers that.

[mkeeter]

You can reproduce the "hello, world" image with something like

cargo run -pfidget-cli --release  -- render2d -i local/hello_world_xy.txt --type=vm -oout.png --mode=mono

where hello_world_xy.txt is here.

The "expression size at pixel evaluation" was a one-off, generated by a Fidget branch that printed region info + a Python script to generate the final image.

[davehorner]

@mkeeter thanks for sharing this!