Add skinned mesh picking

Cargo.toml

@@ -5026,6 +5026,15 @@ doc-scrape-examples = true
 [package.metadata.example.test_skinned_mesh_bounds]
 hidden = true
 
+[[example]]
+name = "test_skinned_mesh_picking"
+path = "tests/3d/test_skinned_mesh_picking.rs"
+doc-scrape-examples = true
+required-features = ["free_camera"]
+
+[package.metadata.example.test_skinned_mesh_picking]
+hidden = true
+
 [profile.wasm-release]
 inherits = "release"
 opt-level = "z"

benches/benches/bevy_picking/ray_mesh_intersection.rs

@@ -154,6 +154,7 @@ fn bench(c: &mut Criterion) {
                             &mesh_to_world,
                             &mesh.positions,
                             Some(&mesh.normals),
+                            None,
                             Some(&mesh.indices),
                             None,
                             backface_culling,

crates/bevy_mesh/src/mesh.rs

@@ -30,7 +30,7 @@ pub const INDEX_BUFFER_ASSET_INDEX: u64 = 0;
 pub const VERTEX_ATTRIBUTE_BUFFER_ID: u64 = 10;
 
 /// Error from accessing mesh vertex attributes or indices
-#[derive(Error, Debug, Clone)]
+#[derive(Error, Debug, Clone, PartialEq)]
 pub enum MeshAccessError {
     #[error("The mesh vertex/index data has been extracted to the RenderWorld (via `Mesh::asset_usage`)")]
     ExtractedToRenderWorld,
@@ -354,6 +354,25 @@ impl Mesh {
         }
     }
 
+    /// Returns a copy of the mesh without attributes, indices, morph targets,
+    /// and the data derived from them (like the AABB). Settings like
+    /// `primitive_topology` and `asset_usage` are preserved.
+    pub fn as_empty(&self) -> Mesh {
+        Mesh {
+            primitive_topology: self.primitive_topology,
+            enable_raytracing: self.enable_raytracing,
+            asset_usage: self.asset_usage,
+            attributes: MeshExtractableData::Data(Default::default()),
+            indices: MeshExtractableData::NoData,
+            #[cfg(feature = "morph")]
+            morph_targets: MeshExtractableData::NoData,
+            #[cfg(feature = "morph")]
+            morph_target_names: MeshExtractableData::NoData,
+            final_aabb: None,
+            skinned_mesh_bounds: None,
+        }
+    }
+
     /// Returns the topology of the mesh.
     pub fn primitive_topology(&self) -> PrimitiveTopology {
         self.primitive_topology