scripts-blender/addons/brushstroke_tools/utils.py

@@ -164,9 +164,13 @@ def transfer_modifier(modifier_name, target_obj, source_obj):
                 setattr(target_bake, prop, value)
 
 def is_brushstrokes_object(object):
+    if not object:
+        return False
     return 'BSBST_active' in object.keys()
 
 def is_surface_object(object):
+    if not object:
+        return False
     for ob in bpy.data.objects:
         if 'BSBST_surface_object' not in ob.keys():
             continue
@@ -175,6 +179,8 @@ def is_surface_object(object):
     return False
 
 def is_flow_object(object):
+    if not object:
+        return False
     for ob in bpy.data.objects:
         if 'BSBST_flow_object' not in ob.keys():
             continue
@@ -183,11 +189,15 @@ def is_flow_object(object):
     return False
 
 def get_surface_object(bs):
+    if not bs:
+        return None
     if 'BSBST_surface_object' not in bs.keys():
         return None
     return bs['BSBST_surface_object']
 
 def get_flow_object(bs):
+    if not bs:
+        return None
     if 'BSBST_flow_object' not in bs.keys():
         return None
     return bs['BSBST_flow_object']
@@ -213,6 +223,8 @@ def edit_active_brushstrokes(context):
     active_object = bs_ob
     if flow_object:
         active_object = flow_object
+    if not active_object:
+        return {"CANCELLED"}
 
     context.view_layer.objects.active = active_object
     for ob in bpy.data.objects: