[Bf-blender-cvs] [672a0af081c] master: Fix T76438: Wrong calculation of depth for Follow Track constraint

[Sergey Sharybin]

Commit: 672a0af081cf80b5f8d4ed3c5ea79be14480f3e1
Author: Sergey Sharybin
Date:   Mon May 11 11:45:20 2020 +0200
Branches: master
https://developer.blender.org/rB672a0af081cf80b5f8d4ed3c5ea79be14480f3e1

Fix T76438: Wrong calculation of depth for Follow Track constraint

Need to transform direction as such, without adding translation component
of the camera matrix.

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

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

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

diff --git a/source/blender/blenkernel/intern/constraint.c b/source/blender/blenkernel/intern/constraint.c
index 7fe438c8c45..679fe703b13 100644
--- a/source/blender/blenkernel/intern/constraint.c
+++ b/source/blender/blenkernel/intern/constraint.c
@@ -4821,7 +4821,7 @@ static float followtrack_distance_from_viewplane_get(FollowTrackContext *context
 
   /* Direction of camera's local Z axis in the world space. */
   float camera_axis[3];
-  mul_v3_m4v3(camera_axis, camera_matrix, z_axis);
+  mul_v3_mat3_m4v3(camera_axis, camera_matrix, z_axis);
 
   /* Distance to projection plane. */
   float vec[3];