Shipyard ⚓

Basic Example

use shipyard::{Component, IntoIter, View, ViewMut, World};

#[derive(Component)]
struct Health(u32);
#[derive(Component)]
struct Position {
    x: f32,
    y: f32,
}

fn in_acid(positions: View<Position>, mut healths: ViewMut<Health>) {
    for (_, health) in (&positions, &mut healths)
        .iter()
        .filter(|(pos, _)| is_in_acid(pos))
    {
        health.0 -= 1;
    }
}

fn is_in_acid(_: &Position) -> bool {
    // it's wet season
    true
}

fn main() {
    let mut world = World::new();

    world.add_entity((Position { x: 0.0, y: 0.0 }, Health(1000)));

    world.run(in_acid);
}

Small Game Example

Inspired by Erik Hazzard's Rectangle Eater.

Table of Contents

• Origin of the name
• Motivation
• Cargo Features
• License
• Contributing

Origin of the name

Assembly lines take input, process it at each step, and output a result. You can have multiple lines working in parallel as long as they don't bother each other.

Shipyards such as the Venetian Arsenal are some of the oldest examples of successful, large-scale, industrial assembly lines. So successful that it could output a fully-finished ship every day.

Shipyard is a project you can use to build your own highly-parallel software processes.

Motivation

I initially wanted to make an ECS to learn how it works. After a failed attempt and some research, I started working on Shipyard.

Specs was already well established as the go-to Rust ECS but I thought I could do better and went with EnTT's core data-structure (SparseSet) and grouping model. A very flexible combo.

Cargo Features

• parallel (default) — enables workload threading and add parallel iterators
• proc (default) — re-exports macros from shipyard_proc, mainly to derive Component
• serde1 — adds (de)serialization support with serde
• std (default) — lets Shipyard use the standard library
• thread_local — adds methods and types required to work with !Send and !Sync components
• tracing — reports workload and system execution

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contributing

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.