Re-track the plane after clearing the keyframe

From the math point of view there're two cases:

- Clearing the keyframe between two other ones.

  In this case tracker will first track plane from
  left keyframe to right one without doing any kind
  of blending. This will make plane stick to the
  actual plane motion, but lead to possible jump
  at the right keyframe.

  Second step is to track from the right keyframe
  to the left one with blending. This gives nice
  transition at the point of second keyframe and
  this mimics situation when you've been setting
  keyframes from left to right.

- Clearing left-most/right-most keyframe.

  In this case it's enough to only re-track the
  plane without blending from the neighbor keyframe
  without blending.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_tracking.h b/source/blender/blenkernel/BKE_tracking.h
index a860378a35f..51f97180ddb 100644
--- a/source/blender/blenkernel/BKE_tracking.h
+++ b/source/blender/blenkernel/BKE_tracking.h
@@ -218,6 +218,7 @@ void BKE_tracking_refine_marker(struct MovieClip *clip, struct MovieTrackingTrac
 /* **** Plane tracking **** */
 
 void BKE_tracking_track_plane_from_existing_motion(struct MovieTrackingPlaneTrack *plane_track, int start_frame);
+void BKE_tracking_retrack_plane_from_existing_motion_at_segment(struct MovieTrackingPlaneTrack *plane_track, int start_frame);
 void BKE_tracking_homography_between_two_quads(/*const*/ float reference_corners[4][2], /*const*/ float corners[4][2], float H[3][3]);
 
 /* **** Camera solving **** */