PyAPI RNA/BGE

* all mathutils types now have optional callbacks
* PyRNA returns mathutils quat and euler types automatically when they have the rotation subtype.
* PyRNA, reuse the BPy_StructRNA PyObject rather name making a new one for each function returned.
* use more arithb.c functions for Mathutils quaternion type (less inline cruft).
* BGE Mathutils integration mostly finished- KX_PyMath now converts to Mathutils types rather then lists.
* make all mathutils types share the same header so they can share a number of functions - dealloc, getWrapped, getOwner.

source/blender/python/generic/euler.h

@@ -40,12 +40,13 @@ extern PyTypeObject euler_Type;
 
 typedef struct {
 	PyObject_VAR_HEAD 
-	struct{
-		float *py_data;		//python managed
-		float *blend_data;	//blender managed
-	}data;
-	float *eul;				//1D array of data (alias)
-	int wrapped;			//is wrapped data?
+	float *eul;					/*1D array of data */
+	PyObject *cb_user;			/* if this vector references another object, otherwise NULL, *Note* this owns its reference */
+	unsigned char cb_type;		/* which user funcs do we adhere to, RNA, GameObject, etc */
+	unsigned char cb_subtype;	/* subtype: location, rotation... to avoid defining many new functions for every attribute of the same type */
+	unsigned char wrapped;		/* wrapped data type? */
+	/* end BaseMathObject */
+
 } EulerObject;
 
 /*struct data contains a pointer to the actual data that the
@@ -55,5 +56,6 @@ blender (stored in blend_data). This is an either/or struct not both*/
 
 //prototypes
 PyObject *newEulerObject( float *eul, int type );
+PyObject *newEulerObject_cb(PyObject *cb_user, int cb_type, int cb_subtype);
 
 #endif				/* EXPP_euler_h */