Changes between Initial Version and Version 1 of code/howto/ClassHierarchy

Timestamp:

Oct 10, 2008, 1:17:51 AM (16 years ago)

Author:

landauf

Comment:

—

code/howto/ClassHierarchy

@@ +1 @@
+= HowTo: Adding a new class to the hierarchy =
+[[TracNav(TracNav/TOC_Development)]]
+[[TOC]]
+
+The class hierarchy in Orxonox is controlled by [wiki:Identifier Identifiers]. Every class has it's identifier. This page explains how a new class is added correctly to the class hierarchy.
+
+== Objects ==
+If you want to create a new object (an object in the sense of a game-related class), you have to inherit directly or indirectly from [wiki:BaseObject] and call '''RegisterObject('''''ClassName''''')''' (see [wiki:CoreIncludes]) in the constructor of this class.
+
+If you want this class to be [wiki:Loader loadable] from an [wiki:XMLPort XML-file], add '''CreateFactory('''''ClassName''''')''' outside of the code. This creates a mapping between the string "ClassName" and the class itself (see [wiki:Factory]).
+
+*.h file:
+{{{
+class MyClass : public BaseObject
+{
+    public:
+        MyClass();
+};
+
+or
+
+class MyClass : public SomeOtherObject
+{
+    public:
+        MyClass();
+};
+}}}
+
+*.cc file:
+{{{
+CreateFactory(MyClass); // optional
+
+// Constructor:
+MyClass::MyClass()
+{
+    RegisterObject(MyClass);
+}
+}}}
+
+== Interfaces ==
+Interfaces in Orxonox aren't objects by themselfes, but provide functions and features for real objects. Those objects inherit from the interfaces, additionally to [wiki:BaseObject] (or a derivative).
+
+Interfaces have to inherit virtually from [wiki:OrxonoxClass] and call '''RegisterRootObject('''''InterfaceName''''')''' in the constructor.
+
+*.h file:
+{{{
+class MyInterface : virtual public OrxonoxClass
+{
+    public:
+        MyInterface();
+};
+}}}
+
+*.cc file:
+{{{
+// Constructor:
+MyInterface::MyInterface()
+{
+    RegisterRootObject(MyInterface);
+}
+}}}