[Bf-blender-cvs] [f73b3178f76] master: Fix T63599: fix the zero ease hack for the B-Bone end matrix.

[Alexander Gavrilov]

Commit: f73b3178f7667c06bbc30499e2e449b4e386b155
Author: Alexander Gavrilov
Date:   Sun Apr 14 20:30:33 2019 +0300
Branches: master
https://developer.blender.org/rBf73b3178f7667c06bbc30499e2e449b4e386b155

Fix T63599: fix the zero ease hack for the B-Bone end matrix.

Negate the second derivative, because it's effectively stepping back.

===================================================================

M	source/blender/blenkernel/intern/armature.c

===================================================================

diff --git a/source/blender/blenkernel/intern/armature.c b/source/blender/blenkernel/intern/armature.c
index 890a62351c1..1b9e6dcdbc4 100644
--- a/source/blender/blenkernel/intern/armature.c
+++ b/source/blender/blenkernel/intern/armature.c
@@ -862,6 +862,7 @@ int BKE_pchan_bbone_spline_compute(BBoneSplineParameters *param, const bool for_
 			make_bbone_spline_matrix(param, scalemats, cur, axis, roll, scalefac, result_array[a].mat);
 		}
 
+		negate_v3(bezt_deriv2[1]);
 		ease_handle_axis(bezt_deriv1[2], bezt_deriv2[1], axis);
 		make_bbone_spline_matrix(param, scalemats, bezt_controls[3], axis, roll2, param->scaleOut, result_array[param->segments].mat);
 	}