beet_sim 0.0.7

Game AI simulation primitives built upon beet_flow
Documentation 
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use crate::prelude::*;
use beet_core::prelude::*;

//// Added to children of Collectables and Zones for consideration in [`FindStatSteerTarget`]
#[derive(Default, Component, Reflect)]
#[reflect(Default, Component)]
pub struct StatProvider;


/// Add this as a child of an entity to make it collectable.
/// This will be able to be picked up.
#[derive(Component, Reflect)]
#[reflect(Default, Component)]
#[require(StatProvider)]
pub struct CollectableStat {
	pub radius: f32,
}

impl Default for CollectableStat {
	fn default() -> Self { Self { radius: 0.5 } }
}

impl CollectableStat {}


pub fn pickup_collectable(
	mut commands: Commands,
	stat_map: Res<StatMap>,
	children: Query<&Children>,
	mut stats: Query<(&mut StatId, &mut StatValue)>,
	collectors: Query<(Entity, &GlobalTransform), With<Collector>>,
	query: Populated<(Entity, &GlobalTransform, &CollectableStat)>,
) {
	for (
		collectable_entity,
		transform,
		collectable_stat,
		// stat_id,
		// stat_value,
	) in query.iter()
	{
		let rad_sq = collectable_stat.radius * collectable_stat.radius;
		for (collector_entity, collector_transform) in collectors.iter() {
			if transform
				.translation()
				.distance_squared(collector_transform.translation())
				> rad_sq
			{
				continue;
			}
			apply_stats(
				&mut commands,
				&stat_map,
				collector_entity,
				collectable_entity,
				&children,
				&mut stats,
			);
			commands.entity(collectable_entity).try_despawn();
		}
	}
}