Remove math for 2D affine transform

Commit e1665c3d3190 added math to do 2D affine transformations with 3x3
matrices, but these matrices are also used for 3D transformations.

Remove added functions and use 4x4 matrices for 2D transformation.

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D12510

1 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/editors/transform/transform_gizmo_2d.c b/source/blender/editors/transform/transform_gizmo_2d.c
index 7ba52ec823d..84f7900e31c 100644
--- a/source/blender/editors/transform/transform_gizmo_2d.c
+++ b/source/blender/editors/transform/transform_gizmo_2d.c
@@ -652,7 +652,6 @@ static void gizmo2d_xform_invoke_prepare(const bContext *C,
   float c[3] = {mid[0], mid[1], 0.0f};
 
   float orient_matrix[3][3];
-  unit_m3(orient_matrix);
 
   ScrArea *area = CTX_wm_area(C);
 
@@ -673,7 +672,7 @@ static void gizmo2d_xform_invoke_prepare(const bContext *C,
 
     rotate_around_center_v2(c, origin, ggd->rotation);
 
-    rotate_m3(orient_matrix, ggd->rotation);
+    axis_angle_to_mat3_single(orient_matrix, 'Z', ggd->rotation);
   }
 
   int orient_type = gizmo2d_calc_transform_orientation(C);