Motion Paths: Experimental optimisations from joeedh for speeding up the calculation process

This works by tricking the depsgraph into giving us a smaller list of objects to evaluate, with all the necessary objects + their dependencies at the start of the list. 

On any complicated setup where non-object parameters need to be referred to (i.e. by drivers) to affect an object's transform, these optimisations will fail and the old (slower) method is still the best way (modify the ifdef and comment out the optimise depsgraph call to do so). However, we'll assume that these aren't too common in real productions, so things should be fine with these fixes. If there really is a need for both, then global options to control these things could follow.

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_object_types.h b/source/blender/makesdna/DNA_object_types.h
index f50909e641b..9649b8351a6 100644
--- a/source/blender/makesdna/DNA_object_types.h
+++ b/source/blender/makesdna/DNA_object_types.h
@@ -412,14 +412,15 @@ extern Object workob;
 #define BA_HAS_RECALC_OB	4
 #define BA_HAS_RECALC_DATA	8
 
-	// XXX DEPRECEATED SETTING...
-#define BA_DO_IPO			32
+	/* NOTE: this was used as a proper setting in past, so nullify before using */
+#define BA_TEMP_TAG			32
 
 #define BA_FROMSET			128
 
 #define BA_TRANSFORM_CHILD	256 /* child of a transformed object */
 #define BA_TRANSFORM_PARENT	8192 /* parent of a transformed object */
 
+
 /* an initial attempt as making selection more specific! */
 #define BA_DESELECT		0
 #define BA_SELECT		1