Constraint stuff from tuhopuu including (but probably not limited too):

Axis options for TrackTo
LockTrack
FollowPath

Auto creation of TrackTo constraint from Ctrl-T (old track still an option)

Auto creation of FollowPath when parenting to path (Normal parent still an option)

Backward compatibility stuff to convert the per object axis settings to per constraint when a Track constraint is present.

Function to convert old track to constraint (commented out)

Revamped the constraints interface with Matt's work from tuhopuu and the stuff we were discussing earlier.

--------------------
For coders:

unique_constraint_name and *new_constraint_data  moved to the kernel (constraint.c)

new Projf function in arithb gives the projection of a vector on another vector

add_new_constraint now takes a constraint type (int) parameter

add_constraint_to_object(bConstraint *con, Object *ob) to link a constraint to an object

add_constraint_to_client(bConstraint *con) to link constraint to current client (object or bone)

add_influence_key_to_constraint (bConstraint *con) to (eventually) add a keyframe to the influence IPO of a constraint

1 files changed, 31 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_constraint_types.h b/source/blender/makesdna/DNA_constraint_types.h
index 02199b9aa01..7cd0272a8cb 100644
--- a/source/blender/makesdna/DNA_constraint_types.h
+++ b/source/blender/makesdna/DNA_constraint_types.h
@@ -109,9 +109,21 @@ typedef struct bActionConstraint{
 	char		subtarget[32];
 } bActionConstraint;
 
-/* Single-target object constraints */
+/* Locked Axis Tracking constraint */
+typedef struct bLockTrackConstraint{
+	Object		*tar;
+	int			trackflag;
+	int			lockflag;
+	char		subtarget[32];
+} bLockTrackConstraint;
+
+/* Follow Path constraints */
 typedef struct bFollowPathConstraint{
 	Object		*tar;	/* Must be path object */
+	float		offset; /* Offset in time on the path (in frame) */
+	int			followflag;
+	int			trackflag;
+	int			upflag;
 } bFollowPathConstraint;
 
 /* Zero-target constraints */
@@ -126,7 +138,7 @@ typedef struct bRotationConstraint{
 #define CONSTRAINT_TYPE_CHILDOF		1	/* Unimplemented */
 #define CONSTRAINT_TYPE_TRACKTO		2	
 #define CONSTRAINT_TYPE_KINEMATIC	3	
-#define CONSTRAINT_TYPE_FOLLOWPATH	4	/* Unimplemented */
+#define CONSTRAINT_TYPE_FOLLOWPATH	4
 #define CONSTRAINT_TYPE_ROTLIMIT	5	/* Unimplemented */
 #define CONSTRAINT_TYPE_LOCLIMIT	6	/* Unimplemented */
 #define CONSTRAINT_TYPE_SIZELIMIT	7	/* Unimplemented */
@@ -135,6 +147,7 @@ typedef struct bRotationConstraint{
 #define CONSTRAINT_TYPE_SIZELIKE	10	/* Unimplemented */
 #define CONSTRAINT_TYPE_PYTHON		11	/* Unimplemented */
 #define CONSTRAINT_TYPE_ACTION		12
+#define CONSTRAINT_TYPE_LOCKTRACK	13	/* New Tracking constraint that locks an axis in place - theeth */
 
 /* bConstraint.flag */
 #define CONSTRAINT_EXPAND		0x00000001
@@ -154,5 +167,21 @@ typedef struct bRotationConstraint{
 #define LOCLIKE_Y		0x00000002
 #define LOCLIKE_Z		0x00000004
 
+/* Tracking flags */
+#define LOCK_X		0x00000000
+#define LOCK_Y		0x00000001
+#define LOCK_Z		0x00000002
+
+#define UP_X		0x00000000
+#define UP_Y		0x00000001
+#define UP_Z		0x00000002
+
+#define TRACK_X		0x00000000
+#define TRACK_Y		0x00000001
+#define TRACK_Z		0x00000002
+#define TRACK_nX	0x00000003
+#define TRACK_nY	0x00000004
+#define TRACK_nZ	0x00000005
+
 #endif