Toggle visibility of details layer based on zoom

apps/osm_viewer_bevy/src/main.rs

@@ -4,8 +4,11 @@ use bevy_pancam::{PanCam, PanCamPlugin};
 use colors::ColorScheme;
 use map_model::Map;
 use map_renderer::{
-    details_layer::DetailsLayerBundle, intersection::IntersectionBundle, lane::LaneBundle,
-    map_layer::MapLayerBundle, road::RoadBundle,
+    details_layer::{toggle_details_visibility, DetailsLayerBundle},
+    intersection::IntersectionBundle,
+    lane::LaneBundle,
+    map_layer::MapLayerBundle,
+    road::RoadBundle,
 };
 
 mod colors;
@@ -22,6 +25,7 @@ fn main() {
         .add_plugins(DefaultPlugins)
         .add_plugin(PanCamPlugin::default())
         .add_startup_system(setup)
+        .add_system(toggle_details_visibility)
         .run();
 }
 

apps/osm_viewer_bevy/src/map_renderer/details_layer.rs

@@ -2,14 +2,19 @@ use std::f32::consts::PI;
 
 use bevy::prelude::*;
 
+#[derive(Component)]
+pub struct DetailsLayer;
+
 #[derive(Bundle)]
 pub struct DetailsLayerBundle {
+    details_layer: DetailsLayer,
     spatial_bundle: SpatialBundle,
 }
 
 impl Default for DetailsLayerBundle {
     fn default() -> Self {
         DetailsLayerBundle {
+            details_layer: DetailsLayer,
             spatial_bundle: SpatialBundle {
                 transform: Transform::from_rotation(Quat::from_rotation_x(PI))
                     .with_translation(Vec3::new(0., 0., -1.)),
@@ -18,3 +23,10 @@ impl Default for DetailsLayerBundle {
         }
     }
 }
+
+pub fn toggle_details_visibility(
+    camera_projection: Query<&OrthographicProjection, With<Camera2d>>,
+    mut details_visibility: Query<&mut Visibility, With<DetailsLayer>>,
+) {
+    details_visibility.single_mut().is_visible = camera_projection.single().scale < 0.75;
+}