New driver option for the poor suffering riggers:

"Rotation Difference"

This option, for Bones, allows the angle between two Bones to be
the driver for another Ipo channel. This angle now is hardcoded 
based on the Bone-space orientation (without parenting rotation).

Thanks to nathan for poking and test!

1 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_curve_types.h b/source/blender/makesdna/DNA_curve_types.h
index bd772bbeecb..807fc2add07 100644
--- a/source/blender/makesdna/DNA_curve_types.h
+++ b/source/blender/makesdna/DNA_curve_types.h
@@ -193,9 +193,12 @@ typedef struct Curve {
 typedef struct IpoDriver {
 	struct Object *ob;
 	short blocktype, adrcode, type, flag;
-	char name[128];	/* bone or constraint(?), or python expression here */
+	char name[128];	 /* bone or constraint(?), or python expression here */
 } IpoDriver;
 
+/* temp? we store more bone names in 1 driver... */
+#define DRIVER_NAME_OFFS	32
+
 typedef struct IpoCurve {
 	struct IpoCurve *next,  *prev;