docs: add doxygen comments for GeometryConnection class

src/Engine/Operator/GeometryConnection.h

@@ -6,24 +6,56 @@
 namespace enzo::nt
 {
 class GeometryOperator;
+
+/**
+* @class GeometryConnection
+* @brief Directional edges to connect nodes
+*
+*
+* @todo Currently geometry connections are stored on nodes. It might
+* make more sense to move them to a container within the network manager
+* so they're all in the same place
+*
+* Input and output are in relation to data flow.
+*
+* @todo Currently geometry connections are stored on nodes. It might
+* make more sense to move them to a container within the network manager
+* so they're all in the same place
+*/
+
 class GeometryConnection
 {
 public:
-    // input and output are in relation to data flow
-    // the input node is the node the data flows from
-    // the output node is the node the data flows to
-    GeometryConnection(enzo::nt::OpId inputOpId, unsigned int inputIndex, enzo::nt::OpId outputOpId, unsigned int outputIndex);
+    /**
+    * @brief Constructs a connection between two nodes
+    *
+    * Input and output are in relation to data flow.
+    *
+    * @param inputOpId The [Operator ID](@ref OpId) in which data flows from.
+    * @param outputOpId The [Operator ID](@ref OpId) in which data flows to.
+    * @param inputOpIndex The output socket number of @p inputOpId in which data flows from.
+    * @param outputOpIndex The input socket number of @p outputOpId in which data flows to.
+    */
+    GeometryConnection(enzo::nt::OpId inputOpId, unsigned int inputOpIndex, enzo::nt::OpId outputOpId, unsigned int outputOpIndex);
     
+    /// @brief Returns the [Operator ID](@ref OpId) of the connection input (where data flows from).
     enzo::nt::OpId getInputOpId() const;
+    /// @brief Returns the [Operator ID](@ref OpId) of the connection output (where data flows to).
     enzo::nt::OpId getOutputOpId() const;
+    /// @brief Returns the socket number of #getInputOpId in which data flows from.
     unsigned int getInputIndex() const;
+    /// @brief Returns the socket number of #getOutputOpId in which data flows to.
     unsigned int getOutputIndex() const;
+
+    /// @brief Provides an ostream representation of the connection, useful for debugging.
     friend std::ostream& operator<<(std::ostream& os, const GeometryConnection& p)
     {
         return os << p.inputOperatorId_ << ":" << p.inputIndex_ << " -> " << p.outputOperatorId_ << ":" << p.outputIndex_ << "\n";
     }
 
+    /// @brief A signal emitted when the connection is removed
     boost::signals2::signal<void ()> removed;
+    /// @brief Removes the connection from it's associated nodes. Does not delete the object.
     void remove();
     // bool isValid();
 private:

src/Engine/Types.h

@@ -74,6 +74,9 @@ namespace enzo
     }
     namespace nt
     {
+        /**
+        * @brief The unique ID assigned to each node in the network.
+        */
         using OpId = uint64_t;
 
         enum class SocketIOType {