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

src/AnimGraph/AnimGraphResource.h

@@ -123,6 +123,23 @@ struct AnimGraphResource {
     return true;
   }
 
+  bool isSocketConnected(
+      const AnimNodeResource& node,
+      const std::string& socket_name) {
+    int node_index = getNodeIndex(node);
+    for (size_t i = 0, n = m_connections.size(); i < n; i++) {
+      const AnimGraphConnectionResource& connection = m_connections[i];
+      if ((connection.source_node_index == node_index
+           && connection.source_socket_name == socket_name)
+          || ((connection.target_node_index == node_index)
+              && connection.target_socket_name == socket_name)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
   AnimGraph createInstance() const;
   void createRuntimeNodeInstances(AnimGraph& instance) const;
   void prepareGraphIOData(AnimGraph& instance) const;