Allow scale sync opt-out

src/collision/collider/backend.rs

@@ -4,7 +4,7 @@
 
 use std::marker::PhantomData;
 
-use crate::{broad_phase::BroadPhaseSet, prelude::*, prepare::PrepareSet};
+use crate::{broad_phase::BroadPhaseSet, prelude::*, prepare::PrepareSet, sync::SyncConfig};
 #[cfg(all(feature = "bevy_scene", feature = "default-collider"))]
 use bevy::scene::SceneInstance;
 use bevy::{
@@ -642,7 +642,12 @@ pub fn update_collider_scale<C: ScalableCollider>(
         // Child colliders
         Query<(&ColliderTransform, &mut C), (With<Parent>, Changed<ColliderTransform>)>,
     )>,
+    sync_config: Res<SyncConfig>,
 ) {
+    if !sync_config.transform_to_collider_scale {
+        return;
+    }
+
     // Update collider scale for root bodies
     for (transform, mut collider) in &mut colliders.p0() {
         #[cfg(feature = "2d")]

src/sync/mod.rs

@@ -143,22 +143,32 @@ impl Plugin for SyncPlugin {
     }
 }
 
-/// Configures what physics data is synchronized by the [`SyncPlugin`] and how.
+/// Configures what physics data is synchronized by the [`SyncPlugin`] and [`PreparePlugin`] and how.
 #[derive(Resource, Reflect, Clone, Debug, PartialEq, Eq)]
 #[reflect(Resource)]
 pub struct SyncConfig {
     /// Updates transforms based on [`Position`] and [`Rotation`] changes. Defaults to true.
+    ///
+    /// This operation is run in [`SyncSet::PositionToTransform`].
     pub position_to_transform: bool,
     /// Updates [`Position`] and [`Rotation`] based on transform changes,
-    /// allowing you to move bodies using `Transform`. Defaults to true.
+    /// allowing you to move bodies using [`Transform`]. Defaults to true.
+    ///
+    /// This operation is run in [`SyncSet::TransformToPosition`].
     pub transform_to_position: bool,
+    /// Updates [`Collider::scale()`] based on transform changes,
+    /// allowing you to scale colliders using [`Transform`]. Defaults to true.
+    ///
+    /// This operation is run in [`PrepareSet::Finalize`]
+    pub transform_to_collider_scale: bool,
 }
 
 impl Default for SyncConfig {
     fn default() -> Self {
         SyncConfig {
             position_to_transform: true,
             transform_to_position: true,
+            transform_to_collider_scale: true,
         }
     }
 }