Initial works for actial animation sampling and graph evaluation.

src/AnimGraph/AnimGraph.h

@@ -66,6 +66,8 @@ struct AnimGraph {
     delete m_socket_accessor;
   }
 
+  bool init(AnimGraphContext& context);
+
   void updateOrderedNodes();
   void updateOrderedNodesRecursive(int node_index);
   void markActiveNodes();
@@ -73,7 +75,6 @@ struct AnimGraph {
     return node->m_state != AnimNodeEvalState::Deactivated;
   }
 
-
   void evalInputNode();
   void prepareNodeEval(size_t node_index);
   void finishNodeEval(size_t node_index);
@@ -81,7 +82,7 @@ struct AnimGraph {
 
   void evalSyncTracks();
   void updateTime(float dt);
-  void evaluate();
+  void evaluate(AnimGraphContext& context);
   void reset() {
     for (size_t i = 0, n = m_nodes.size(); i < n; i++) {
       m_nodes[i]->m_time_now = 0.f;
@@ -99,7 +100,7 @@ struct AnimGraph {
   void* getInputPtr(const std::string& name) const {
     const Socket* input_socket = getInputSocket(name);
     if (input_socket != nullptr) {
-      return input_socket->m_value.ptr;
+      return input_socket->m_reference.ptr;
     }
 
     return nullptr;