Support rotated sprites (and rotated hit boxes)

backends/bevy_picking_sprite/src/lib.rs

@@ -73,20 +73,28 @@ pub fn sprite_picking(
                     if blocked || !visibility.is_visible() {
                         return None;
                     }
-                    let (scale, _rot, position) = sprite_transform.to_scale_rotation_translation();
+
+                    // Hit box in sprite coordinate system
                     let extents = sprite
                         .custom_size
-                        .or_else(|| images.get(image).map(|f| f.size()))?
-                        * scale.truncate();
-                    let center = position.truncate() - (sprite.anchor.as_vec() * extents);
+                        .or_else(|| images.get(image).map(|f| f.size()))?;
+                    let center = -sprite.anchor.as_vec() * extents;
                     let rect = Rect::from_center_half_size(center, extents / 2.0);
 
-                    let is_cursor_in_sprite = rect.contains(cursor_pos_world);
+                    // Transform cursor pos to sprite coordinate system
+                    let cursor_pos_sprite = sprite_transform
+                        .affine()
+                        .inverse()
+                        .transform_point3((cursor_pos_world, 0.0).into());
+
+                    let is_cursor_in_sprite = rect.contains(cursor_pos_sprite.truncate());
                     blocked = is_cursor_in_sprite
                         && sprite_focus.map(|p| p.should_block_lower) != Some(false);
 
-                    is_cursor_in_sprite
-                        .then_some((entity, HitData::new(cam_entity, position.z, None, None)))
+                    is_cursor_in_sprite.then_some((
+                        entity,
+                        HitData::new(cam_entity, sprite_transform.translation().z, None, None),
+                    ))
                 },
             )
             .collect();

examples/sprite.rs

@@ -78,8 +78,9 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
                     },
                     texture: asset_server.load("images/boovy.png"),
                     // 3x3 grid of anchor examples by changing transform
-                    transform: Transform::from_xyz(i * len - len, j as f32 * len - len, 0.0)
-                        .with_scale(Vec3::splat(1.0 + (i - 1.0) * 0.2)),
+                    transform: Transform::from_xyz(i * len - len, j * len - len, 0.0)
+                        .with_scale(Vec3::splat(1.0 + (i - 1.0) * 0.2))
+                        .with_rotation(Quat::from_rotation_z((j - 1.0) * 0.2)),
                     ..default()
                 });
             }