Store faces in Storage

src/kernel/algorithms/sweep.rs

@@ -53,7 +53,7 @@ pub fn sweep_shape(
     }
 
     for face in bottom_faces {
-        shape.faces().add(face);
+        shape.faces().add((*face).clone());
     }
     for face in top_faces {
         shape.faces().add(face);

src/kernel/shape/faces.rs

@@ -17,19 +17,23 @@ pub struct Faces<'r> {
 impl Faces<'_> {
     /// Add a face to the shape
     pub fn add(&mut self, face: Face) -> Handle<Face> {
-        self.faces.push(face.clone());
-        Storage::new(face).handle()
+        let storage = Storage::new(face);
+        let handle = storage.handle();
+
+        self.faces.push(storage);
+
+        handle
     }
 
     /// Check whether the shape contains a specific face
     #[cfg(test)]
     pub fn contains(&self, face: &Face) -> bool {
-        self.faces.contains(face)
+        self.faces.contains(&Storage::new(face.clone()))
     }
 
     /// Access an iterator over all faces
-    pub fn all(&self) -> impl Iterator<Item = Face> + '_ {
-        self.faces.iter().cloned()
+    pub fn all(&self) -> impl Iterator<Item = Handle<Face>> + '_ {
+        self.faces.iter().map(|storage| storage.handle())
     }
 
     pub fn triangles(

src/kernel/shape/mod.rs

@@ -92,4 +92,4 @@ impl Shape {
 
 type VerticesInner = Vec<Storage<Vertex>>;
 type CyclesInner = Vec<Storage<Cycle>>;
-type FacesInner = Vec<Face>;
+type FacesInner = Vec<Storage<Face>>;

src/kernel/shapes/difference_2d.rs

@@ -56,7 +56,8 @@ impl ToShape for fj::Difference2d {
                 );
             };
 
-            let (a, b, surface_a, surface_b) = match (a, b) {
+            let (a, b, surface_a, surface_b) =
+                match ((*a).clone(), (*b).clone()) {
                     (
                         Face::Face {
                             cycles: a,

src/kernel/shapes/union.rs

@@ -19,10 +19,10 @@ impl ToShape for fj::Union {
         // See issue:
         // https://github.com/hannobraun/Fornjot/issues/42
         for face in a.faces().all() {
-            shape.faces().add(face);
+            shape.faces().add((*face).clone());
         }
         for face in b.faces().all() {
-            shape.faces().add(face);
+            shape.faces().add((*face).clone());
         }
 
         shape