source/blender/editors/include/ED_mesh.h

@@ -602,6 +602,11 @@ struct Mesh *ED_mesh_context(struct bContext *C);
  */
 void ED_mesh_split_faces(struct Mesh *mesh);
 
+/**
+ * Reset and fill the "sharp_edge" attribute based on the angle of manifold edges.
+ */
+void ED_mesh_sharp_from_angle_set(struct Mesh *mesh, float angle);
+
 /* mesh backup */
 typedef struct BMBackup {
   struct BMesh *bmcopy;

source/blender/editors/mesh/mesh_data.cc

@@ -1447,3 +1447,11 @@ void ED_mesh_split_faces(Mesh *mesh)
 
   geometry::split_edges(*mesh, split_mask, {});
 }
+
+void ED_mesh_sharp_from_angle_set(Mesh *mesh, const float angle)
+{
+  mesh->attributes_for_write().remove("sharp_edge");
+  mesh->attributes_for_write().remove("sharp_face");
+  BKE_mesh_sharp_edges_set_from_angle(mesh, angle);
+  DEG_id_tag_update(&mesh->id, ID_RECALC_GEOMETRY);
+}

source/blender/makesrna/intern/rna_mesh_api.c

@@ -12,8 +12,8 @@
 
 #include "DNA_customdata_types.h"
 
+#include "BLI_math_base.h"
 #include "BLI_sys_types.h"
-
 #include "BLI_utildefines.h"
 
 #include "rna_internal.h" /* own include */
@@ -215,6 +215,11 @@ void RNA_api_mesh(StructRNA *srna)
   RNA_def_function_ui_description(
       func, "Deprecated. Has no effect. Normals are calculated upon retrieval");
 
+  func = RNA_def_function(srna, "set_sharp_from_angle", "ED_mesh_sharp_from_angle_set");
+  RNA_def_function_ui_description(
+      func, "Set the sharp edge status for edges based on the angle of incident faces");
+  RNA_def_float(func, "angle", M_PI, 0.0f, M_PI, "Angle", "", 0.0f, M_PI);
+
   func = RNA_def_function(srna, "split_faces", "rna_Mesh_split_faces");
   RNA_def_function_ui_description(func, "Split faces based on the edge angle");
   /* TODO: This parameter has no effect anymore, since the internal code does not need to