More CSS work

src/menus/scaling.rs

@@ -15,15 +15,35 @@ fn compute_ui_scale(window_size: Vec2) -> f32 {
 }
 
 pub fn ui_update_scale_on_startup(window: Single<&Window>, mut ui_scale: ResMut<UiScale>) {
-    ui_scale.0 = compute_ui_scale(window.size()); 
+    ui_scale.0 = compute_ui_scale(window.size());
 }
 
-pub fn ui_scaling_system(mut resize_reader: MessageReader<WindowResized>, mut ui_scale: ResMut<UiScale>) {
-
+pub fn ui_scaling_system(
+    mut resize_reader: MessageReader<WindowResized>,
+    mut ui_scale: ResMut<UiScale>,
+) {
     for event in resize_reader.read() {
         let dimensions = Vec2::new(event.width, event.height);
         *ui_scale = UiScale(compute_ui_scale(dimensions));
-        
-        break
+
+        break;
     }
+}
+
+pub fn world_to_ui_position(pos: Vec2, camera: &Camera, camera_transform: &GlobalTransform, ui_scale: &UiScale) -> Vec2 {
+    let viewport_position = camera.world_to_viewport(camera_transform, Vec3::new(pos.x, pos.y, 0.0)).unwrap();
+
+    let viewport_rect = camera.logical_viewport_rect().unwrap();
+
+    let ui_position = (viewport_position - viewport_rect.min) / ui_scale.0;
+
+    ui_position
+}
+
+pub fn logical_to_ui_position(pos: Vec2, camera: &Camera, ui_scale: &UiScale) -> Vec2 {
+    let viewport_rect = camera.logical_viewport_rect().unwrap();
+
+    let ui_position = (pos - viewport_rect.min) / ui_scale.0;
+
+    ui_position
 }