Simple entity-component system in pure Rust. Type reflection - no macros!
Visit the crates.io page, and add the
specified line ("recs = ...") to the [dependencies] section of your
Cargo.toml. From then on, cargo build should automatically download and compile
Rustic ECS.
https://andybarron.github.io/rustic-ecs
```rust extern crate recs; use recs::{Ecs, EntityId};
struct Age{years: u32}
struct Iq{points: i32}
fn main() {
// Create an ECS instance
let mut system: Ecs = Ecs::new();
// Add entity to the system
let forrest: EntityId = system.create_entity();
// Attach components to the entity
// The Ecs.set method returns an EcsResult that will be set to Err if
// the specified entity does not exist. If you're sure that the entity exists, suppress
// Rust's "unused result" warning by prefixing your calls to set(..) with "let _ = ..."
let _ = system.set(forrest, Age{years: 22});
let _ = system.set(forrest, Iq{points: 75}); // "I may not be a smart man..."
// Get clone of attached component data from entity
let age = system.get::<Age>(forrest).unwrap();
assert_eq!(age.years, 22);
// Annotating the variable's type may let you skip type parameters
let iq: Iq = system.get(forrest).unwrap();
assert_eq!(iq.points, 75);
// Modify an entity's component
let older = Age{years: age.years + 1};
let _ = system.set(forrest, older);
// Modify a component in-place with a mutable borrow
system.borrow_mut::<Iq>(forrest).map(|iq| iq.points += 5);
// Inspect a component in-place without cloning
assert_eq!(system.borrow::<Age>(forrest), Ok(&Age{years: 23}));
// Inspect a component via cloning
assert_eq!(system.get::<Iq>(forrest), Ok(Iq{points: 80}));
} ```
MIT. Hooray!
(See LICENSE.txt for details.)