Mesh: Add Auto Smooth option to Shade Smooth operator

Add a property to the **Shade Smooth** operator to quickly enable the Mesh `use_auto_smooth` option.

The `Angle` property is exposed in the **Adjust Last Operation** panel to make it easy to tweak on multiple objects without having to go to the Properties editor.

The operator is exposed in the `Object` menu and `Object Context Menu`.

=== Demo ===

{F13066173, size=full}

Regarding the implementation, there are multiple ways to go about this (like making a whole new operator altogether), but I think a property is the cleanest/simplest.

I imagine there are simpler ways to achieve this without duplicating the `use_auto_smooth` property in the operator itself (getting it from the Mesh props?), but I couldn't find other operators doing something similar.

Reviewed By: #modeling, mont29

Differential Revision: https://developer.blender.org/D14894

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/mesh.cc b/source/blender/blenkernel/intern/mesh.cc
index 628f59ae449..4e3544d0f60 100644
--- a/source/blender/blenkernel/intern/mesh.cc
+++ b/source/blender/blenkernel/intern/mesh.cc
@@ -1577,6 +1577,19 @@ void BKE_mesh_smooth_flag_set(Mesh *me, const bool use_smooth)
   }
 }
 
+void BKE_mesh_auto_smooth_flag_set(Mesh *me,
+                                   const bool use_auto_smooth,
+                                   const float auto_smooth_angle)
+{
+  if (use_auto_smooth) {
+    me->flag |= ME_AUTOSMOOTH;
+    me->smoothresh = auto_smooth_angle;
+  }
+  else {
+    me->flag &= ~ME_AUTOSMOOTH;
+  }
+}
+
 int poly_find_loop_from_vert(const MPoly *poly, const MLoop *loopstart, uint vert)
 {
   for (int j = 0; j < poly->totloop; j++, loopstart++) {