1 files changed, 43 insertions, 4 deletions

diff --git a/src/crepe/api/BehaviorScript.h b/src/crepe/api/BehaviorScript.h
index 6b1fec7..2982358 100644
--- a/src/crepe/api/BehaviorScript.h
+++ b/src/crepe/api/BehaviorScript.h
@@ -3,6 +3,7 @@
 #include <memory>
 
 #include "../Component.h"
+#include "GameObject.h"
 
 namespace crepe {
 
@@ -10,23 +11,61 @@ class ScriptSystem;
 class ComponentManager;
 class Script;
 
+/**
+ * \brief Script component
+ *
+ * This class acts as a (component) wrapper around an instance of (a class
+ * derivatived from) \c Script. \c BehaviorScript is the only ECS component
+ * that stores member function implementations as data.
+ */
 class BehaviorScript : public Component {
 protected:
-	friend class crepe::ComponentManager;
-	using Component::Component;
+	BehaviorScript(game_object_id_t id, ComponentManager & component_manager);
+	//! Only ComponentManager is allowed to instantiate BehaviorScript
+	friend class ComponentManager;
 
 public:
-	virtual ~BehaviorScript() = default;
+	~BehaviorScript() = default;
 
 public:
+	/**
+	 * \brief Set the concrete script of this component
+	 *
+	 * \tparam T Concrete script type (derived from \c crepe::Script)
+	 *
+	 * \returns Reference to BehaviorScript component (`*this`)
+	 */
 	template <class T>
 	BehaviorScript & set_script();
 
 protected:
-	friend class crepe::ScriptSystem;
+	//! ScriptSystem needs direct access to the script instance
+	friend class ScriptSystem;
+	//! Flag to indicate if script->init() has been called already
+	bool initialized = false;
+	//! Script instance
 	std::unique_ptr<Script> script = nullptr;
+	//! Reference to component manager
+	ComponentManager & component_manager;
+
+private:
+	//! Script accesses the component manager directly via its parent
+	// (BehaviorScript) reference
+	friend class Script;
 };
 
+/**
+ * \brief Add a BehaviorScript component to this game object
+ *
+ * The \c BehaviorScript class is the only exception to the ECS harmony, and
+ * requires a reference to the component manager passed to its constructor in
+ * order to function normally. This is because the \c BehaviorScript (and \c
+ * Script) classes are the only component-related classes that store
+ * implemented member functions as data.
+ */
+template <>
+BehaviorScript & GameObject::add_component<BehaviorScript>();
+
 } // namespace crepe
 
 #include "BehaviorScript.hpp"