fix scroll

src/camera.rs

@@ -82,6 +82,7 @@ pub fn spawn_panning_camera(mut commands: Commands) {
 
 pub fn scroll_events(mut evr_scroll: EventReader<MouseWheel>, mut query: Query<&mut Projection>) {
     const ZOOM_SENSITIVITY: f32 = 0.035;
+    const PIXEL_SENSITIVITY: f32 = 0.001;
     const MIN_SCALE: f32 = 0.2;
     const MAX_SCALE: f32 = 2.0;
 
@@ -90,13 +91,16 @@ pub fn scroll_events(mut evr_scroll: EventReader<MouseWheel>, mut query: Query<&
             let current_scale = match &*projection_component {
                 Projection::Orthographic(ortho_proj) => ortho_proj.scale,
                 Projection::Perspective(_) => 1.0,
-                Projection::Custom(_custom_projection) => todo!(),
+                Projection::Custom(_custom_projection) => {
+                    continue;
+                }
             };
 
             let new_scale = match ev.unit {
                 MouseScrollUnit::Line => current_scale + ev.y * ZOOM_SENSITIVITY,
-                MouseScrollUnit::Pixel => todo!(),
+                MouseScrollUnit::Pixel => current_scale + ev.y * PIXEL_SENSITIVITY,
             };
+            
             *projection_component = Projection::Orthographic(OrthographicProjection {
                 scale: new_scale.max(MIN_SCALE).min(MAX_SCALE),
                 ..OrthographicProjection::default_2d()