Animato - Support for 'BuiltIn' and 'Relative' Keying Sets

When inserting keyframes in the 3D-View (support will be extended to other editors in due course) using the IKEY hotkey, the menu which appears will now consist of 3 parts: 
* 'Active Keying Set' - this option allows you to use the user-defined KeyingSet which is active for the current scene (i.e. the one seen in the TimeLine/Outliner headers)
* User defined Keying Sets - a list of all such available KeyingSets is included, and entries can be chosen from there
* Built-In Keying Sets - see later...

To achieve this, several changes needed to be made first:
* Added support for 'relative' in addition to 'absolute' Keying Sets. Relative Keying Sets are Keying Sets which operate on data from the current context (i.e. a 'location' KeyingSet will add location keyframes for selected objects/bones/nodes as opposed to location keyframes for some particular object). The is a tentative 'templates' requirement system here, which still needs to be fully fleshed out.
* Added support for builtin Keying Sets (i.e. 'Location', 'Rotation', 'Scaling', and 'LocRot' as a few initial demonstrations), which replaces the temporary Insert Keyframe operator for the 3D-View (IKEY). These are effectively relative Keying Set definitions which are included in Blender by default and stored in a list separate from user-defined ones. Volunteer help in defining a few more of these for other editors will be welcome soon.
* Removed/replaced much of the crappy temporary Keyframing operator code, though a few tweaks could still be done.

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_constraint.h b/source/blender/blenkernel/BKE_constraint.h
index 0d8c81a5a75..6e69906b71d 100644
--- a/source/blender/blenkernel/BKE_constraint.h
+++ b/source/blender/blenkernel/BKE_constraint.h
@@ -110,11 +110,13 @@ bConstraintTypeInfo *get_constraint_typeinfo(int type);
 /* Constraint function prototypes */
 void unique_constraint_name(struct bConstraint *con, struct ListBase *list);
 
-void free_constraints(struct ListBase *conlist);
+void free_constraints(struct ListBase *list);
 void copy_constraints(struct ListBase *dst, struct ListBase *src);
 void relink_constraints(struct ListBase *list);
 void free_constraint_data(struct bConstraint *con);
 
+struct bConstraint *constraints_get_active(struct ListBase *list);
+
 /* Constraints + Proxies function prototypes */
 void extract_proxylocal_constraints(struct ListBase *dst, struct ListBase *src);
 short proxylocked_constraints_owner(struct Object *ob, struct bPoseChannel *pchan);