notes.txt

xorshift32 for pseudorandom https://en.wikipedia.org/wiki/Xorshift
reference single rng 

each thread gets own rng but make them static and just next random instead of spawning new rng each time needed

rayon to parallelize

https://deterministic.space/high-performance-rust.html

https://likebike.com/posts/How_To_Write_Fast_Rust_Code.html
    notice if let , get over indexing [i]


persistent immutable stuff with pointers 

https://stackoverflow.com/questions/39219961/how-to-get-assembly-output-from-building-with-cargo 
    notice emit asm for better llvm optimizing


https://www.reddit.com/r/rust/comments/k0qzcf/a_raytracer_written_in_rust/
https://www.reddit.com/r/rust/comments/k0qzcf/a_raytracer_written_in_rust/gdl6vn4/

https://github.com/IceSentry/raytracing-weekend-rs/blob/master/src/renderer.rs

https://github.com/daniel5151/vrai-tracer

https://github.com/nsauzede/realist/pull/5/commits/a2187f18fc6379742e1d9a5253aa6af52f272a94


https://github.com/JDuchniewicz/rustracing/pull/1/commits/e83b3585381ae67a4aebdc646a4b41dca38a5161
https://github.com/JDuchniewicz/rustracing/pull/1


https://stackoverflow.com/questions/31012923/what-is-the-difference-between-copy-and-clone 
    Notie Copy requires Clone but they do different things; copy means not move


cfg debug for easier debug

scene.rs for random scene, cornell, etc

add triangles and stuff

render.rs

chill with the Rc pointers

u8 as the color

https://github.com/perliedman/raytracing-in-one-weekend/blob/aa641d43e1540b05d2cfb500f8c4a0a64ec9f9f9/src/renderer.rs
    example of parallel iterators and maps


https://www.reddit.com/r/rust/comments/kbec6h/polymorphism_in_rust_enums_vs_traits/gfi2gnu/
    An enum is a closed set of types, with an arbitrary number of related properties.
    A trait is a closed set of properties, with an arbitrary number of related types.

https://www.forrestthewoods.com/blog/should-small-rust-structs-be-passed-by-copy-or-by-borrow/

debug http://psgraphics.blogspot.com/2020/12/debugging-refraction-in-ray-tracer.html


imagemagick: convert x.ppm x.png

gitbash or wsl
$ RUSTFLAGS="--emit asm" cargo build --release && cargo run --release > image_balls.ppm

const and tail call recursion 
generic types for vectors


buffer/queue mutex gated pipeline of random numbers that threads take? nondeterministic order

apparenlty glam is good for graphics linalg while nalgebra/ndarray/lapack/blas is for general purpose linalg