Added demo scene with 2d/3d camera controls and gizmos to help with initial setup

Cargo.lock

@@ -364,6 +364,7 @@ dependencies = [
  "bevy",
  "bevy-inspector-egui",
  "bevy_mod_debugdump",
+ "bevy_prototype_debug_lines",
  "bevy_rapier2d",
  "num-traits",
 ]
@@ -833,6 +834,13 @@ dependencies = [
  "thread_local",
 ]
 
+[[package]]
+name = "bevy_prototype_debug_lines"
+version = "0.11.1"
+dependencies = [
+ "bevy",
+]
+
 [[package]]
 name = "bevy_ptr"
 version = "0.13.0"

Cargo.toml

@@ -11,6 +11,9 @@ bevy-inspector-egui = "0.23.2"
 bevy_mod_debugdump = "0.10.0"
 bevy_rapier2d = "0.25.0"
 num-traits = "0.2.18"
+bevy_prototype_debug_lines = { path = "../bevy_debug_lines", features = [
+	# "3d"
+] } # NOTE: Local version until registry updates to 0.13
 
 # Enable a small amount of optimization in debug mode
 [profile.dev]

src/debug.rs

@@ -9,8 +9,9 @@ impl Plugin for DebugPlugin {
     fn build(&self, app: &mut App) {
         app.configure_sets(Last, DebugSet.run_if(is_debug_enabled));
 
-        app.insert_resource(DebugMode::off())
+        app.insert_resource(DebugMode::on())
             .add_plugins((
+                bevy_prototype_debug_lines::DebugLinesPlugin::default(),
                 bevy_inspector_egui::quick::WorldInspectorPlugin::new().run_if(is_debug_enabled),
                 bevy_rapier2d::prelude::RapierDebugRenderPlugin::default(),
             ))
@@ -34,7 +35,7 @@ impl DebugMode {
     }
 }
 
-fn is_debug_enabled(debug_mode: Res<DebugMode>) -> bool {
+pub fn is_debug_enabled(debug_mode: Res<DebugMode>) -> bool {
     debug_mode.enabled
 }
 

src/game.rs

@@ -2,15 +2,137 @@ use crate::{debug, game_setup};
 use bevy::prelude::*;
 
 pub fn init(app: &mut App) {
-    app.add_plugins((
+    let mut app = app.add_plugins((
         game_setup::GameSetupPlugin,
         bevy_rapier2d::prelude::RapierPhysicsPlugin::<bevy_rapier2d::prelude::NoUserData>::default(
         ),
         debug::DebugPlugin,
-    ))
-    .add_systems(Startup, setup);
+    ));
+
+    app.add_systems(Startup, setup_2d)
+        .add_systems(Update, demo_2d);
+
+    // NOTE: If using 3D, make sure you have '3d' feature enabled for the
+    // 'bevy_prototype_debug_lines' crate
+    // app.add_systems(Startup, setup_3d)
+    //     .add_systems(Update, demo_3d);
 }
 
-fn setup(mut commands: Commands) {
-    commands.spawn(Camera2dBundle::default());
+fn setup_2d(mut commands: Commands) {
+    commands.spawn(Camera2dBundle {
+        transform: Transform::from_xyz(0.0, 0.0, 100.0),
+        ..default()
+    });
+}
+
+fn demo_2d(
+    mut camera_query: Query<(&mut Transform, &mut OrthographicProjection)>,
+    mut mouse_events: EventReader<bevy::input::mouse::MouseMotion>,
+    mut scroll_events: EventReader<bevy::input::mouse::MouseWheel>,
+    mut debug_lines: ResMut<bevy_prototype_debug_lines::DebugLines>,
+    mut debug_shapes: ResMut<bevy_prototype_debug_lines::DebugShapes>,
+    mouse_input: Res<ButtonInput<MouseButton>>,
+    time: Res<Time>,
+) {
+    let raw_mouse_motion: Vec2 = mouse_events.read().map(|e| e.delta).sum();
+    let raw_scroll_motion: f32 = scroll_events
+        .read()
+        .map(|event| match event.unit {
+            bevy::input::mouse::MouseScrollUnit::Line => event.y * -0.1,
+            bevy::input::mouse::MouseScrollUnit::Pixel => event.y * -0.05,
+        })
+        .sum();
+
+    for (mut transform, mut projection) in camera_query.iter_mut() {
+        projection.scale += raw_scroll_motion * projection.scale;
+        let mouse_motion = raw_mouse_motion * projection.scale * Vec2::new(-1.0, 1.0);
+        if mouse_input.pressed(MouseButton::Middle) {
+            transform.translation += mouse_motion.extend(0.0);
+        }
+    }
+
+    debug_lines.line_colored(Vec3::ZERO, Vec3::X * 50.0, 0.0, Color::RED);
+    debug_lines.line_colored(Vec3::ZERO, Vec3::Y * 50.0, 0.0, Color::GREEN);
+
+    debug_shapes
+        .rect()
+        .size(Vec2::splat(200.0))
+        .rotation(Quat::from_euler(
+            EulerRot::YXZ,
+            0.0,
+            0.0,
+            time.elapsed_seconds(),
+        ))
+        .color(Color::WHITE);
+}
+
+fn setup_3d(mut commands: Commands) {
+    commands.spawn(Camera3dBundle {
+        transform: Transform::from_xyz(0.0, 0.0, 10.0),
+        ..default()
+    });
+}
+
+fn demo_3d(
+    mut camera_query: Query<&mut Transform>,
+    mut mouse_events: EventReader<bevy::input::mouse::MouseMotion>,
+    mut debug_lines: ResMut<bevy_prototype_debug_lines::DebugLines>,
+    mut debug_shapes: ResMut<bevy_prototype_debug_lines::DebugShapes>,
+    mouse_input: Res<ButtonInput<MouseButton>>,
+    key_input: Res<ButtonInput<KeyCode>>,
+    time: Res<Time>,
+) {
+    let raw_mouse_motion: Vec2 = mouse_events.read().map(|e| e.delta).sum();
+
+    if mouse_input.pressed(MouseButton::Right) {
+        let move_forward = key_input.pressed(KeyCode::KeyW);
+        let move_back = key_input.pressed(KeyCode::KeyS);
+        let move_left = key_input.pressed(KeyCode::KeyA);
+        let move_right = key_input.pressed(KeyCode::KeyD);
+        let move_up = key_input.pressed(KeyCode::Space) || key_input.pressed(KeyCode::KeyE);
+        let move_down = key_input.pressed(KeyCode::ControlLeft) || key_input.pressed(KeyCode::KeyQ);
+
+        let raw_movement = Vec3 {
+            x: match (move_right, move_left) {
+                (true, false) => 1.0,
+                (false, true) => -1.0,
+                _ => 0.0,
+            },
+            y: match (move_up, move_down) {
+                (true, false) => 1.0,
+                (false, true) => -1.0,
+                _ => 0.0,
+            },
+            z: match (move_back, move_forward) {
+                (true, false) => 1.0,
+                (false, true) => -1.0,
+                _ => 0.0,
+            },
+        };
+
+        for mut transform in camera_query.iter_mut() {
+            let mouse_motion = raw_mouse_motion * Vec2::new(-1.0, -1.0) * 0.002;
+            transform.rotate_axis(Vec3::Y, mouse_motion.x);
+            transform.rotate_local_x(mouse_motion.y);
+
+            let local_movement = raw_movement * time.delta_seconds() * 10.0;
+            let movement = transform.rotation * local_movement;
+            transform.translation += movement;
+        }
+    }
+
+    debug_lines.line_colored(Vec3::ZERO, Vec3::X, 0.0, Color::RED);
+    debug_lines.line_colored(Vec3::ZERO, Vec3::Y, 0.0, Color::GREEN);
+    debug_lines.line_colored(Vec3::ZERO, Vec3::Z, 0.0, Color::BLUE);
+
+    debug_shapes
+        .cuboid()
+        .size(Vec3::splat(3.0))
+        .rotation(Quat::from_euler(
+            EulerRot::YXZ,
+            time.elapsed_seconds(),
+            0.0,
+            0.0,
+        ))
+        .color(Color::WHITE);
 }