Bugfix #27881: Motion paths don't correctly update with pose sliding

tools

source/blender/blenkernel/intern/anim.c

@@ -173,7 +173,7 @@ bMotionPath *animviz_verify_motionpaths(Scene *scene, Object *ob, bPoseChannel *
 	}
 
 	/* avoid 0 size allocs */
-	if(avs->path_sf >= avs->path_ef) {
+	if (avs->path_sf >= avs->path_ef) {
 		return NULL;
 	}
 
@@ -231,6 +231,7 @@ typedef struct MPathTarget {
 /* get list of motion paths to be baked for the given object
  * 	- assumes the given list is ready to be used
  */
+// TODO: it would be nice in future to be able to update objects dependant on these bones too?
 void animviz_get_object_motionpaths(Object *ob, ListBase *targets)
 {
 	MPathTarget *mpt;

source/blender/editors/armature/poseUtils.c

@@ -247,6 +247,15 @@ void poseAnim_mapping_autoKeyframe (bContext *C, Scene *scene, Object *ob, ListB
 		/* insert keyframes for all relevant bones in one go */
 		ANIM_apply_keyingset(C, &dsources, NULL, ks, MODIFYKEY_MODE_INSERT, cframe);
 		BLI_freelistN(&dsources);
+		
+		/* do the bone paths
+		 *	- only do this if keyframes should have been added
+		 *	- do not calculate unless there are paths already to update...
+		 */
+		if (C && (ob->pose->avs.path_bakeflag & MOTIONPATH_BAKE_HAS_PATHS)) {
+			//ED_pose_clear_paths(C, ob); // XXX for now, don't need to clear
+			ED_pose_recalculate_paths(scene, ob);
+		}
 	}
 }