Added keyboard movement for easier debugging

src/game/camera.rs

@@ -118,13 +118,32 @@ fn free_system(
     mut free_query: Query<(&mut Transform, &GameCamera, &OrthographicProjection)>,
     mut mouse_events: EventReader<MouseMotion>,
     mouse_input: Res<Input<MouseButton>>,
+    key_input: Res<Input<KeyCode>>,
+    time: Res<Time>,
 ) {
     let raw_mouse_motion: Vec2 = mouse_events.iter().map(|e| e.delta).sum();
     for (mut transform, camera, projection) in free_query.iter_mut() {
         if camera.mode == CameraMode::Free {
-            let mouse_motion = raw_mouse_motion * projection.scale * Vec2::new(-1.0, 1.0);
+            let mut motion = Vec2::ZERO;
             if mouse_input.pressed(MouseButton::Middle) {
-                input_movement(&mut transform, mouse_motion)
+                motion += raw_mouse_motion * projection.scale * Vec2::new(-1.0, 1.0);
+            }
+            motion.x = match (key_input.pressed(KeyCode::A), key_input.pressed(KeyCode::D)) {
+                (true, false) => -1.0,
+                (false, true) => 1.0,
+                (_, _) => 0.0,
+            } * projection.scale
+                * time.delta_seconds()
+                * 100.0;
+            motion.y = match (key_input.pressed(KeyCode::S), key_input.pressed(KeyCode::W)) {
+                (true, false) => -1.0,
+                (false, true) => 1.0,
+                (_, _) => 0.0,
+            } * projection.scale
+                * time.delta_seconds()
+                * 100.0;
+            if motion != Vec2::ZERO {
+                input_movement(&mut transform, motion)
             }
         }
     }