Fix T37555: Update 3D toolbox for changes to the BMesh API.

Referenced by issue #37555, 3D Print Toolbox Error message

object_print3d_utils/mesh_helpers.py

@@ -54,7 +54,7 @@ def bmesh_copy_from_object(obj, transform=True, triangulate=True, apply_modifier
         bm.transform(obj.matrix_world)
 
     if triangulate:
-        bmesh.ops.triangulate(bm, faces=bm.faces, use_beauty=True)
+        bmesh.ops.triangulate(bm, faces=bm.faces)
 
     return bm
 
@@ -103,6 +103,9 @@ def bmesh_check_self_intersect_object(obj):
     """
     import bpy
 
+    if not obj.data.polygons:
+        return array.array('i', ())
+
     # Heres what we do!
     #
     # * Take original Mesh.
@@ -115,7 +118,7 @@ def bmesh_check_self_intersect_object(obj):
     # Triangulate
     bm = bmesh_copy_from_object(obj, transform=False, triangulate=False)
     face_map_index_org = {f: i for i, f in enumerate(bm.faces)}
-    ret = bmesh.ops.triangulate(bm, faces=bm.faces, use_beauty=False)
+    ret = bmesh.ops.triangulate(bm, faces=bm.faces)
     face_map = ret["face_map"]
     # map new index to original index
     face_map_index = {i: face_map_index_org[face_map.get(f, f)] for i, f in enumerate(bm.faces)}
@@ -196,7 +199,7 @@ def bmesh_check_thick_object(obj, thickness):
     bm = bmesh_copy_from_object(obj, transform=True, triangulate=False)
     # map original faces to their index.
     face_index_map_org = {f: i for i, f in enumerate(bm.faces)}
-    ret = bmesh.ops.triangulate(bm, faces=bm.faces, use_beauty=False)
+    ret = bmesh.ops.triangulate(bm, faces=bm.faces)
     face_map = ret["face_map"]
     del ret
     # old edge -> new mapping

object_print3d_utils/operators.py

@@ -543,6 +543,10 @@ class Print3DScaleToVolume(Operator):
             volume = sum(calc_volume(obj) for obj in context.selected_editable_objects
                          if obj.type == 'MESH')
 
+        if volume == 0.0:
+            self.report({'WARNING'}, "Object has zero volume")
+            return {'CANCELLED'}
+
         self.volume_init = self.volume = abs(volume)
 
         wm = context.window_manager
@@ -582,12 +586,17 @@ class Print3DScaleToBounds(Operator):
 
         if context.mode == 'EDIT_MESH':
             length, axis = calc_length([Vector(v) * obj.matrix_world
-                                        for v in context.edit_object.bound_box])
+                                        for obj in [context.edit_object]
+                                        for v in obj.bound_box])
         else:
             length, axis = calc_length([Vector(v) * obj.matrix_world
                                         for obj in context.selected_editable_objects
                                         if obj.type == 'MESH' for v in obj.bound_box])
 
+        if length == 0.0:
+            self.report({'WARNING'}, "Object has zero bounds")
+            return {'CANCELLED'}
+
         self.length_init = self.length = length
         self.axis_init = axis