Remove collider density clamping

Author: Jondolf

src/collision/collider/backend.rs

@@ -232,7 +232,7 @@ impl<C: ScalableCollider> Plugin for ColliderBackendPlugin<C> {
                 {
                     // Update collider mass props.
                     *collider_mass_properties =
-                        ColliderMassProperties::from(collider.mass_properties(density.max(f32::EPSILON)));
+                        ColliderMassProperties::from(collider.mass_properties(density.0));
                 }
             },
         );
@@ -691,7 +691,7 @@ pub(crate) fn update_collider_mass_properties<C: AnyCollider>(
     for (collider, density, mut collider_mass_properties) in &mut query {
         // Update the collider's mass properties.
         *collider_mass_properties =
-            ColliderMassProperties::from(collider.mass_properties(density.max(f32::EPSILON)));
+            ColliderMassProperties::from(collider.mass_properties(density.0));
     }
 }
 

src/dynamics/rigid_body/mass_properties/mod.rs

@@ -324,12 +324,6 @@ impl Plugin for MassPropertyPlugin {
                 .in_set(PrepareSet::Finalize),
         );
 
-        // Clamp collider density to be above `0.0`.
-        app.add_systems(
-            self.schedule,
-            clamp_collider_density.before(MassPropertySystems::UpdateColliderMassProperties),
-        );
-
         // Queue mass property recomputation when mass properties are changed.
         app.add_systems(
             self.schedule,
@@ -482,13 +476,6 @@ fn warn_missing_mass(
     }
 }
 
-/// Clamps [`ColliderDensity`] to be above `0.0`.
-fn clamp_collider_density(mut query: Query<&mut ColliderDensity, Changed<ColliderDensity>>) {
-    for mut density in &mut query {
-        density.0 = density.max(f32::EPSILON);
-    }
-}
-
 #[cfg(test)]
 #[cfg(feature = "2d")]
 #[expect(clippy::unnecessary_cast)]