Add feature-gated debug rendering for colliders

Cargo.toml

@@ -3,7 +3,9 @@ name = "shoot-the-revival"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[features]
+default = []
+debug-colliders = []
 
 [dependencies]
 log = "0.4.19"

src/debug/colliders.rs

+use crate::entities::{BoxSize, CollisionGroup};
+use bevy::prelude::{Added, BuildChildren, Commands, Entity, Query, Transform};
+use bevy_prototype_lyon::prelude::{Fill, GeometryBuilder, RectangleOrigin, ShapeBundle, Stroke};
+use bevy_prototype_lyon::shapes;
+
+pub fn spawn_debug_colliders(
+	mut commands: Commands,
+	new_collider_query: Query<(Entity, &BoxSize, &CollisionGroup), Added<CollisionGroup>>,
+) {
+	for (entity, box_size, group) in &new_collider_query {
+		commands.entity(entity).with_children(|commands| {
+			let shape = shapes::Rectangle {
+				origin: RectangleOrigin::Center,
+				extents: **box_size,
+			};
+			commands.spawn((
+				ShapeBundle {
+					transform: Transform::from_xyz(0.0, 0.0, 100.0),
+					path: GeometryBuilder::build_as(&shape),
+					..Default::default()
+				},
+				Fill::color(group.color().with_a(0.3)),
+				Stroke::new(group.color(), 1.5),
+			));
+		});
+	}
+}

src/debug/mod.rs

+#[cfg(feature = "debug-colliders")]
+mod colliders;
+
+mod _plugin {
+	use bevy::app::App;
+	use bevy::prelude::Plugin;
+
+	pub struct DebugPlugin;
+	impl Plugin for DebugPlugin {
+		fn build(&self, app: &mut App) {
+			#[cfg(feature = "debug-colliders")]
+			app.add_system(super::colliders::spawn_debug_colliders);
+		}
+	}
+}
+
+pub use _plugin::DebugPlugin;

src/lib.rs

+pub mod debug;
 pub mod entities;
 pub mod system;
 pub mod utilities;

src/main.rs

@@ -17,6 +17,7 @@ fn main() {
 		}))
 		.add_plugin(shoot_the_revival::system::SystemPlugin)
 		.add_plugin(shoot_the_revival::entities::EntityPlugin)
+		.add_plugin(shoot_the_revival::debug::DebugPlugin)
 		.add_plugin(bevy_prototype_lyon::plugin::ShapePlugin)
 		.run();
 }