Replace references of Vec with slices.

There is no need for a Vec where we don't need one.

Issue #114

Author: david-cattermole

src/mmscenegraph/rust/src/attr/animdense.rs

@@ -52,7 +52,7 @@ impl AnimDenseAttr {
         self.values[f] = value;
     }
 
-    pub fn get_values(&self) -> &Vec<Real> {
+    pub fn get_values(&self) -> &[Real] {
         &self.values
     }
 

src/mmscenegraph/rust/src/math/dag.rs

@@ -204,7 +204,7 @@ pub fn compute_world_matrices_with_attrs(
     tfm_attr_list: &Vec<AttrTransformIds>,
     rotate_order_list: &Vec<RotateOrder>,
     transform_parents: &Vec<Option<usize>>,
-    frame_list: &Vec<FrameValue>,
+    frame_list: &[FrameValue],
     out_matrix_list: &mut Vec<Matrix44>,
 ) {
     // println!("Compute World Matrices!");

src/mmscenegraph/rust/src/scene/bake.rs

@@ -44,7 +44,7 @@ use crate::scene::graphiter::UpstreamDepthFirstSearch;
 /// returned indices.
 fn upstream_node_indices_set(
     sg: &SceneGraph,
-    node_ids: &Vec<NodeId>,
+    node_ids: &[NodeId],
 ) -> HashSet<PGNodeIndex> {
     let graph = &sg.get_graph();
     let mut node_indices_set = HashSet::new();
@@ -108,7 +108,7 @@ fn flatten_filter_and_sort_graph_nodes(
 /// Get the parent index for each node index given.
 fn get_parent_index_list(
     sg: &SceneGraph,
-    node_indices: &Vec<PGNodeIndex>,
+    node_indices: &[PGNodeIndex],
 ) -> Vec<Option<usize>> {
     let mut list = Vec::<Option<usize>>::new();
     let dir = PGDirection::Incoming;

src/mmscenegraph/rust/src/scene/flat.rs

@@ -118,7 +118,7 @@ impl FlatScene {
     pub fn evaluate(
         &mut self,
         attrdb: &AttrDataBlock,
-        frame_list: &Vec<FrameValue>,
+        frame_list: &[FrameValue],
     ) {
         // println!("EVALUATE! =================================================");
         let num_frames = frame_list.len();

src/mmscenegraph/rust/src/scene/graph.rs

@@ -336,7 +336,7 @@ impl SceneGraph {
 
     pub fn get_transformable_nodes(
         &self,
-        node_ids: &Vec<NodeId>,
+        node_ids: &[NodeId],
     ) -> Option<Vec<Box<dyn NodeCanTransform3D>>> {
         let mut nodes = Vec::<Box<dyn NodeCanTransform3D>>::new();
         for node_id in node_ids {
@@ -400,7 +400,7 @@ impl SceneGraph {
     /// Set all the child_node_ids to have the same parent_node_id
     pub fn set_nodes_parent(
         &mut self,
-        child_node_ids: Vec<NodeId>,
+        child_node_ids: &[NodeId],
         parent_node_id: NodeId,
     ) -> bool {
         let node_indices: Vec<PGNodeIndex> = child_node_ids