notation_bevy_utils 0.4.2

Fun notation - bevy utils
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use bevy::prelude::*;
use bevy_prototype_lyon::entity::ShapeBundle;
use bevy_prototype_lyon::prelude::*;

pub trait Shape {
    fn _create(&self, commands: &mut Commands, entity: Entity);
    fn create(&self, commands: &mut Commands, parent: Entity) -> Entity {
        let entity = commands.spawn().id();
        commands.entity(parent).push_children(&[entity]);
        self._create(commands, entity);
        entity
    }
    fn update(&self, commands: &mut Commands, entity: Entity) {
        commands.entity(entity).remove_bundle::<ShapeBundle>();
        self._create(commands, entity);
    }
}

pub trait SingleShape<T: Geometry>: Shape {
    fn get_shape(&self) -> T;
    fn get_draw_mode(&self) -> DrawMode;
    fn get_transform(&self) -> Transform;
    fn _do_create(&self, commands: &mut Commands, entity: Entity) {
        let shape = self.get_shape();
        let draw_mode = self.get_draw_mode();
        let transform = self.get_transform();
        commands
            .entity(entity)
            .insert_bundle(GeometryBuilder::build_as(
                &shape, draw_mode, transform,
            ));
    }
}

pub trait ShapeOp<Theme, S: Shape>: Clone + Component {
    fn get_shape(&self, theme: &Theme) -> S;
    fn create(&self, commands: &mut Commands, theme: &Theme, parent: Entity) -> Entity {
        let shape = self.get_shape(theme);
        let shape_entity = shape.create(commands, parent);
        commands.entity(shape_entity).insert(self.clone());
        shape_entity
    }
    fn update(&self, commands: &mut Commands, theme: &Theme, entity: Entity) {
        let shape = self.get_shape(theme);
        shape.update(commands, entity);
    }
}