diff options
| -rw-r--r-- | source/blender/blenkernel/intern/constraint.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/source/blender/blenkernel/intern/constraint.c b/source/blender/blenkernel/intern/constraint.c index 974d536d83e..bc918df84ed 100644 --- a/source/blender/blenkernel/intern/constraint.c +++ b/source/blender/blenkernel/intern/constraint.c @@ -1833,8 +1833,14 @@ static void rotlike_evaluate(bConstraint *con, bConstraintOb *cob, ListBase *tar /* To allow compatible rotations, must get both rotations in the order of the owner... */ mat4_to_eulO(obeul, rot_order, cob->matrix); /* We must get compatible eulers from the beginning because - * some of them can be modified below (see bug T21875). */ - mat4_to_compatible_eulO(eul, obeul, rot_order, ct->matrix); + * some of them can be modified below (see bug T21875). + * Additionally, since this constraint is based on euler rotation math, it doesn't work well with shear. + * The Y axis is chosen as the main axis when we orthoganalize the matrix because constraints are + * used most commonly on bones. */ + float mat[4][4]; + copy_m4_m4(mat, ct->matrix); + orthogonalize_m4_stable(mat, 1, true); + mat4_to_compatible_eulO(eul, obeul, rot_order, mat); /* Prepare the copied euler rotation. */ bool legacy_offset = false; |