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Fix T85340: Gizmo rotation inverted (in some perspective angles) 

This is an old bug (strange not to have been reported before).

To define the direction of rotation, the View Vector is used.

However, only the projection matrix was being considered, but in
perspective mode, the position of the pivot also matters.
This commit is contained in:
Germano Cavalcante 2021-02-03 14:34:19 -03:00
parent 9042532085
commit bbd74e9fd4
Notes: blender-bot 2023-02-14 04:40:22 +01:00 
Referenced by issue #85340, Gizmo rotation inverted (in some perspective angles)
1 changed files with 3 additions and 1 deletions
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4
source/blender/editors/transform/transform_constraints.c
View File

@ -573,7 +573,9 @@ static void constraints_rotation_imp(TransInfo *t,
}
/* don't flip axis if asked to or if num input */
if (r_angle && (mode & CON_NOFLIP) == 0 && hasNumInput(&t->num) == 0) {
if (dot_v3v3(r_vec, t->viewinv[2]) > 0.0f) {
float view_vector[3];
view_vector_calc(t, t->center_global, view_vector);
if (dot_v3v3(r_vec, view_vector) > 0.0f) {
*r_angle = -(*r_angle);
}
}