Debug toggling (#9)

#8 introduced some additional debug information to the view, which was already
rendering some information and visualizations which were not necessary relevant
to the end-user experience. This PR adds an input action (bound to Ctrl + `) to
toggle the display of those visualizations, and disables them by default.

studio/src/debug.rs

@@ -0,0 +1,83 @@
+use bevy::{prelude::*, window::PrimaryWindow};
+use bevy_inspector_egui::quick::WorldInspectorPlugin;
+use bevy_mod_picking::debug::DebugPickingMode;
+
+use crate::{
+    camera_controller::{CameraController, CameraMotionSystem},
+    input::{Action, InputAction, Lifecycle},
+};
+
+#[derive(Resource, Deref, DerefMut)]
+pub struct DebugMode(bool);
+
+pub struct DebugPlugin;
+impl Plugin for DebugPlugin {
+    fn build(&self, app: &mut App) {
+        app.insert_resource(DebugMode(false))
+            .add_plugins(WorldInspectorPlugin::new().run_if(is_debug_mode))
+            .insert_resource(State::new(DebugPickingMode::Disabled))
+            .insert_resource(GizmoConfig {
+                enabled: true,
+                depth_bias: -0.1,
+                line_perspective: false,
+                line_width: 2.,
+                ..default()
+            })
+            .add_systems(
+                Update,
+                (
+                    toggle_debug_mode,
+                    update_debug_picking_mode.run_if(resource_changed::<DebugMode>()),
+                    update_gizmo_line_thickness,
+                    draw_world_axes
+                        .after(CameraMotionSystem)
+                        .run_if(is_debug_mode),
+                ),
+            );
+    }
+}
+
+fn toggle_debug_mode(mut input: EventReader<InputAction>, mut r_debug: ResMut<DebugMode>) {
+    if input
+        .iter()
+        .any(|action| matches!(action, InputAction(Lifecycle::Stop, Action::ToggleDebug)))
+    {
+        **r_debug = !**r_debug;
+    }
+}
+
+fn update_debug_picking_mode(
+    r_debug: Res<DebugMode>,
+    mut s_debug_picking: ResMut<NextState<DebugPickingMode>>,
+) {
+    s_debug_picking.set(match **r_debug {
+        true => DebugPickingMode::Normal,
+        false => DebugPickingMode::Disabled,
+    });
+}
+
+pub fn is_debug_mode(r_debug: Res<DebugMode>) -> bool {
+    **r_debug
+}
+
+fn update_gizmo_line_thickness(
+    mut config: ResMut<GizmoConfig>,
+    q_window: Query<&Window, (Changed<Window>, With<PrimaryWindow>)>,
+) {
+    if let Ok(scale_factor) = q_window.get_single().map(|win| win.scale_factor() as f32) {
+        config.line_width = 2. * scale_factor;
+    }
+}
+
+fn draw_world_axes(mut gizmos: Gizmos, q: Query<&CameraController>) {
+    let &CameraController { focus, radius, .. } = q.single();
+
+    let mut draw_axis = |direction: Vec3, color: Color| {
+        let end = focus + direction * radius / 15.;
+        gizmos.line(focus, end, color);
+    };
+
+    draw_axis(Vec3::X, Color::RED);
+    draw_axis(Vec3::Y, Color::GREEN);
+    draw_axis(Vec3::Z, Color::BLUE);
+}

studio/src/input.rs

@@ -15,6 +15,7 @@ impl Plugin for StudioInputPlugin {
             PreUpdate,
             (
                 translate_selection_events,
+                translate_debug_toggle,
                 translate_dcc_camera_events,
                 translate_fps_camera_events,
             )
@@ -38,6 +39,7 @@ pub enum Lifecycle {
 pub enum Action {
     Camera(CameraMotion),
     Selection(Selection),
+    ToggleDebug,
 }
 
 #[derive(Clone, Copy)]
@@ -83,6 +85,16 @@ fn translate_selection_events(keyboard: Res<Input<KeyCode>>, mut input: EventWri
     }
 }
 
+fn translate_debug_toggle(keyboard: Res<Input<KeyCode>>, mut input: EventWriter<InputAction>) {
+    if keyboard.pressed(KeyCode::ControlLeft) || keyboard.pressed(KeyCode::ControlRight) {
+        if keyboard.just_pressed(KeyCode::Grave) {
+            input.send(InputAction(Lifecycle::Start, Action::ToggleDebug));
+        } else if keyboard.just_released(KeyCode::Grave) {
+            input.send(InputAction(Lifecycle::Stop, Action::ToggleDebug));
+        }
+    }
+}
+
 fn translate_dcc_camera_events(
     mouse_motion: EventReader<MouseMotion>,
     mouse_buttons: Res<Input<MouseButton>>,

studio/src/interaction.rs

@@ -6,6 +6,7 @@ use bevy_mod_picking::{prelude::Pointer, selection::Select};
 
 use crate::{
     camera_controller::CameraMotionSystem,
+    debug,
     input::{self, Action, InputAction, Lifecycle},
 };
 
@@ -29,6 +30,7 @@ impl Plugin for InteractionPlugin {
                 draw_selection_outline.run_if(resource_changed_or_removed::<Selection>()),
                 draw_selection_axes
                     .run_if(resource_exists::<Selection>())
+                    .run_if(debug::is_debug_mode)
                     .after(CameraMotionSystem),
             ),
         );

studio/src/lib.rs

@@ -1,9 +1,9 @@
 #![allow(clippy::type_complexity, clippy::too_many_arguments)]
 
-use bevy::{prelude::*, window::PrimaryWindow};
-use bevy_inspector_egui::quick::WorldInspectorPlugin;
+use bevy::prelude::*;
 use bevy_mod_picking::DefaultPickingPlugins;
-use camera_controller::{CameraController, CameraControllerPlugin, CameraMotionSystem};
+use camera_controller::CameraControllerPlugin;
+use debug::DebugPlugin;
 use input::StudioInputPlugin;
 use interaction::InteractionPlugin;
 use math::InterpolationPlugin;
@@ -14,6 +14,7 @@ use viewport::ViewportSize;
 use wasm_bindgen::prelude::*;
 
 mod camera_controller;
+mod debug;
 mod input;
 mod interaction;
 mod math;
@@ -42,7 +43,7 @@ pub fn init(viewport_size: ViewportSize) {
             ..default()
         }),
         DefaultPickingPlugins,
-        WorldInspectorPlugin::new(),
+        DebugPlugin,
         InteractionPlugin,
         StudioInputPlugin,
         InterpolationPlugin,
@@ -51,41 +52,5 @@ pub fn init(viewport_size: ViewportSize) {
         SkyboxPlugin,
         UiLayerPlugin,
     ))
-    .insert_resource(GizmoConfig {
-        enabled: true,
-        depth_bias: -0.1,
-        line_perspective: false,
-        line_width: 2.,
-        ..default()
-    })
-    .add_systems(
-        Update,
-        (
-            update_gizmo_line_thickness,
-            draw_world_axes.after(CameraMotionSystem),
-        ),
-    )
     .run();
 }
-
-fn update_gizmo_line_thickness(
-    mut config: ResMut<GizmoConfig>,
-    q_window: Query<&Window, (Changed<Window>, With<PrimaryWindow>)>,
-) {
-    if let Ok(scale_factor) = q_window.get_single().map(|win| win.scale_factor() as f32) {
-        config.line_width = 2. * scale_factor;
-    }
-}
-
-fn draw_world_axes(mut gizmos: Gizmos, q: Query<&CameraController>) {
-    let &CameraController { focus, radius, .. } = q.single();
-
-    let mut draw_axis = |direction: Vec3, color: Color| {
-        let end = focus + direction * radius / 15.;
-        gizmos.line(focus, end, color);
-    };
-
-    draw_axis(Vec3::X, Color::RED);
-    draw_axis(Vec3::Y, Color::GREEN);
-    draw_axis(Vec3::Z, Color::BLUE);
-}

studio/src/ui/fps.rs

@@ -3,13 +3,19 @@ use bevy::{
     prelude::*,
 };
 
+use crate::debug::DebugMode;
+
 pub(super) struct FpsCounterPlugin;
 
 impl Plugin for FpsCounterPlugin {
     fn build(&self, app: &mut App) {
         app.add_plugins(FrameTimeDiagnosticsPlugin)
             .add_systems(Startup, layout)
-            .add_systems(Update, update);
+            .add_systems(Update, update)
+            .add_systems(
+                Update,
+                update_visibility.run_if(resource_exists_and_changed::<DebugMode>()),
+            );
     }
 }
 
@@ -17,24 +23,28 @@ impl Plugin for FpsCounterPlugin {
 struct FramerateCounter;
 
 fn layout(mut cmd: Commands) {
+    let mut text_bundle = TextBundle::from_section(
+        "0 fps",
+        TextStyle {
+            color: Color::GREEN,
+            font_size: 14.,
+            ..default()
+        },
+    )
+    .with_text_alignment(TextAlignment::Right)
+    .with_style(Style {
+        position_type: PositionType::Absolute,
+        right: Val::Px(16.),
+        bottom: Val::Px(16.),
+        ..default()
+    });
+
+    text_bundle.visibility = Visibility::Hidden;
+
     cmd.spawn((
         FramerateCounter,
         Name::new("Framerate Counter"),
-        TextBundle::from_section(
-            "0 fps",
-            TextStyle {
-                color: Color::GREEN,
-                font_size: 14.,
-                ..default()
-            },
-        )
-        .with_text_alignment(TextAlignment::Right)
-        .with_style(Style {
-            position_type: PositionType::Absolute,
-            right: Val::Px(16.),
-            bottom: Val::Px(16.),
-            ..default()
-        }),
+        text_bundle,
     ));
 }
 
@@ -53,3 +63,15 @@ fn update(
         counter.single_mut().sections[0].value = format!("{fps:.2} fps");
     }
 }
+
+fn update_visibility(
+    r_debug: Res<DebugMode>,
+    mut q_visibility: Query<&mut Visibility, With<FramerateCounter>>,
+) {
+    for mut visibility in q_visibility.iter_mut() {
+        *visibility = match **r_debug {
+            true => Visibility::Inherited,
+            false => Visibility::Hidden,
+        }
+    }
+}