Initial graph evaluations, added Float to Vec3 Node, minor editor tweaks.

src/AnimGraph/AnimGraph.h

@@ -74,8 +74,10 @@ struct AnimGraph {
   }
 
 
+  void evalInputNode();
   void prepareNodeEval(size_t node_index);
   void finishNodeEval(size_t node_index);
+  void evalOutputNode();
 
   void evalSyncTracks();
   void updateTime(float dt);
@@ -91,6 +93,18 @@ struct AnimGraph {
   Socket* getInputSocket(const std::string& name);
   Socket* getOutputSocket(const std::string& name);
 
+  const Socket* getInputSocket(const std::string& name) const;
+  const Socket* getOutputSocket(const std::string& name) const;
+
+  void* getInputPtr(const std::string& name) const {
+    const Socket* input_socket = getInputSocket(name);
+    if (input_socket != nullptr) {
+      return input_socket->m_value.ptr;
+    }
+
+    return nullptr;
+  }
+
   int getNodeEvalOrderIndex(const AnimNode* node) {
     for (size_t i = 0, n = m_eval_ordered_nodes.size(); i < n; i++) {
       if (m_eval_ordered_nodes[i] == node) {