Some minor code formatting cleanup and debug printing.

src/assembly.rs

@@ -122,8 +122,6 @@ impl AssemblyBuilder {
 
     pub fn build(mut self) -> Assembly {
         // Shrink storage to minimum.
-        // However, don't shrink shader storage, because there are pointers to
-        // that data that could get invalidated.
         self.instances.shrink_to_fit();
         self.xforms.shrink_to_fit();
         self.objects.shrink_to_fit();
@@ -135,6 +133,8 @@ impl AssemblyBuilder {
                                              1,
                                              |inst| &bbs[bis[inst.id]..bis[inst.id + 1]]);
 
+        println!("Assembly BVH Depth: {}", object_accel.tree_depth());
+
         Assembly {
             instances: self.instances,
             xforms: self.xforms,

src/bvh.rs

@@ -47,11 +47,13 @@ impl BVH {
         bvh.bounds_cache.clear();
         bvh.bounds_cache.shrink_to_fit();
 
-        println!("BVH Depth: {}", bvh.depth);
-
         bvh
     }
 
+    pub fn tree_depth(&self) -> usize {
+        self.depth
+    }
+
     fn acc_bounds<'a, T, F>(&mut self, objects1: &mut [T], bounder: &F)
         where F: 'a + Fn(&T) -> &'a [BBox]
     {

src/parse/psy_assembly.rs

@@ -60,7 +60,10 @@ pub fn parse_assembly(tree: &DataTree) -> Result<Assembly, PsyParseError> {
                 // MeshSurface
                 "MeshSurface" => {
                     if let &DataTree::Internal {ident: Some(ident), ..} = child {
-                        builder.add_object(ident, Object::Surface(Box::new(try!(parse_mesh_surface(&child)))));
+                        builder.add_object(
+                            ident,
+                            Object::Surface(Box::new(try!(parse_mesh_surface(&child))))
+                        );
                     } else {
                         // TODO: error condition of some kind, because no ident
                         panic!();