plasma

Plasma

The Plasma library written in rust. Api reference.

How to implement

Cargo.toml:

[dependencies]
rand = "0.8"

[dependencies.plasma]
git = "https://github.com/royaltm/rust-plasma.git"

main.rs:

use plasma::*;

Then somwehere in the code:

    let min_steps = 80.0f32;
    let max_steps = 200.0f32;
    let plasma_width = 200u32;
    let plasma_height = 200u32;
    let mut rng = rand::thread_rng();
    let cfg = PhaseAmpCfg::new(min_steps, max_steps);
    let mut plasma = Plasma::new(plasma_width, plasma_height, cfg, &mut rng);

    loop {
      let buffer_rgb24: &mut [u8] = get_image_buffer_from_somwhere();
      let pitch: usize = get_how_many_bytes_per_line();
      plasma.render::<PixelBufRGB24, PlasmaICP, PlasmaMixer>(buffer_rgb24, pitch, None);
      display_buffer_on_screen();
      plasma.update(&mut rng);
    }

Features

• std (default) - compile with std library.
• use-simd - specialized implementation with SIMD instructions. Available only for x86, x86_64 or aarch64 architectures, requires nightly rustc features. A significant CPU optimization boost can be achieved if compiled with advanced target-cpu feature flags. Enables std.
• micromath - (alternative to libm) provides math routines for no_std.
• libm - (alternative to micromath) provides math routines for no_std.

SIMD accelerated:

RUSTFLAGS='-C target-cpu=+avx2' cargo build --release --features=use-simd
RUSTFLAGS='-C target-cpu=native' cargo build --release --features=use-simd

Benchmarking

cargo +nightly bench --bench render --features=rand/std -- --nocapture

RUSTFLAGS='-C target-cpu=native' cargo +nightly bench --bench render --features=rand/std,use-simd -- --nocapture

no_std

In no_std mode plasma library still depends on the alloc crate and in addition requires one of the two math libraries, which must be enabled by the depending crate:

Cargo.toml:

[dependencies.plasma]
version = "0.2"
git = "https://github.com/royaltm/rust-plasma.git"
default-features = false
features = ["libm"] # or "micromath"

Plasma on Arm Cortex-M7 with SPI 160x80 displays.