Struct World

pub struct World { /* private fields */ }

Implementations

impl World

pub fn new() -> Self

pub fn add_resource(&mut self, resource: impl Any)

Add a resource.

use ecs_lib_rs::World;
let mut world = World::new();
world.add_resource(1_u32);
assert_eq!(world.get_resource::<u32>(), Some(&1));

pub fn get_resource<T: Any>(&self) -> Option<&T>

Query for a resource and get a reference to it. The type of the resource must be added in so that it can find it.

use ecs_lib_rs::World;
let mut world = World::new();
assert_eq!(world.get_resource::<u32>(), None);
world.add_resource(1_u32);
assert_eq!(world.get_resource::<u32>(), Some(&1));

pub fn get_resource_mut<T: Any>(&mut self) -> Option<&mut T>

Query for a resource and get a mutable reference to it. The type of the resource must be added in so that it can find it.

use ecs_lib_rs::World;
let mut world = World::new();
assert_eq!(world.get_resource_mut::<u32>(), None);
world.add_resource(1_u32);
{
    let x = world.get_resource_mut::<u32>();
    assert_eq!(x, Some(&mut 1_u32));
    let x = x.unwrap();
    *x += 1;
}
assert_eq!(world.get_resource::<u32>(), Some(&2));

pub fn remove_resource<T: Any>(&mut self) -> Option<Box<dyn Any>>

Removes the resource from the world. Returns None if the resource wasn’t present and hence was not deleted. Otherwise, it returns Some(data)

use ecs_lib_rs::World;
let mut world = World::new();
world.add_resource(1_u32);
world.remove_resource::<u32>();
assert_eq!(world.get_resource::<u32>(), None);

pub fn register_component<T: Any>(&mut self)

Register a component. The type of the resource must be added in so that it can find it.

use ecs_lib_rs::World;
let mut world = World::new();
world.register_component::<u32>();

pub fn create_entity(&mut self) -> &mut Entities

pub fn query(&self) -> Query<'_>

pub fn delete_component_by_entity_id<T: Any>(&mut self, id: usize) -> Result<()>

pub fn add_component_to_entity_by_id( &mut self, id: usize, component: impl Any, ) -> Result<()>

pub fn delete_entity_by_id(&mut self, id: usize) -> Result<()>

Trait Implementations

impl Default for World

fn default() -> World

Returns the “default value” for a type.