What am I missing or doing wrong? I made this script to add a cylinder ( just to learn ) but the adjust last operation menu does not work all. What do i need to do to get this linked to the cylinder? In the end I want to add some functions same as current add cylinder but also other funtions.

I guess there is no link between the bl-idname and the cylinder

This is my code

    bl_info = {
    "name": "New Object",
    "author": "Your Name Here",
    "version": (1, 0),
    "blender": (2, 80, 1),
    "location": "View3D > Add > Mesh > New Object",
    "description": "Adds a new Mesh Object",
    "warning": "",
    "wiki_url": "",
    "category": "Add Mesh",

import bpy
from bpy.types import Operator
from bpy.props import FloatVectorProperty
from bpy_extras.object_utils import AddObjectHelper, object_data_add
from mathutils import Vector

radius = 1
depth = 2
location = (0, 0, 0)
rotation = (0, 0, 0)

class OBJECT_OT_add_object(Operator, AddObjectHelper):
    """Create a new Mesh Object"""
    bl_idname = "cylinder.add_object"
    bl_label = "Add Mesh Object"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):

        bpy.ops.mesh.primitive_cylinder_add(radius=radius, depth=depth, location=location, rotation=rotation)

        return {'FINISHED'}

# Registration
def add_object_button(self, context):
        text="Add Object123",

# This allows you to right click on a button and link to documentation
def add_object_manual_map():
    url_manual_prefix = "https://docs.blender.org/manual/en/latest/"
    url_manual_mapping = (
        ("bpy.ops.mesh.add_object", "scene_layout/object/types.html"),
    return url_manual_prefix, url_manual_mapping

def register():

def unregister():

if __name__ == "__main__":

That's pretty close. Just add real properties to the operator class. Minimal example:

enter image description here

import bpy
from bpy.types import Operator
from bpy.props import IntProperty, FloatProperty, FloatVectorProperty

class OBJECT_OT_add_object(Operator):
    """Create a new Mesh Object"""
    bl_idname = "your_category.add_object"
    bl_label = "Add Mesh Object"
    bl_options = {'REGISTER', 'UNDO'}

    my_radius : FloatProperty()
    my_depth : IntProperty()
    my_location : FloatVectorProperty()
    my_rotation : FloatVectorProperty()

    def execute(self, context):
        # Call primitve_add
            radius = self.my_radius, 
            depth = self.my_depth, 
            location = self.my_location, 
            rotation = self.my_rotation)

        return {'FINISHED'}

def register():

def unregister():

if __name__ == "__main__":

Further reading: https://docs.blender.org/api/current/bpy.props.html

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  • $\begingroup$ Thanks for your answer This was what i was looking for. May i ask you where i can find documentation about FloatVectorProperty? For example what kind of property is align? $\endgroup$ – DGRL Dec 15 '19 at 9:52
  • 1
    $\begingroup$ Added the link to the API, there you have a list of all available properties. Properties are basically data types (int, float, string etc) so in case of "align" it depends what do you want to do (Yes/Nope? -> Bool). Also I'd suggest read How to create a custom UI? @DGRL $\endgroup$ – brockmann Dec 15 '19 at 10:34
  • 2
    $\begingroup$ Maybe keep the AddObjectHelper subclass to deal with the usual suspects loc, rot, scale, align. $\endgroup$ – batFINGER Dec 15 '19 at 10:43

With the AddObjectHelper class

enter image description here

Further to @brockmann's answer

The AddObjectHelper class sets up some of the usual suspects for us, including location, rotation and align. It appears you have used the text editor > templates > python > Addon add object template, so let's stick with it in.

If we simply ourselves add

rotation : FloatVectorProperty()

the rotation will always show in the base unit of radians. 360 degrees = 2pi radians. In scene unit settings degrees is the default set to display in the UI

rotation : FloatVectorProperty(unit='ROTATION')

is required in the property definition to make it behave like other rotation props. Just as unit='LENGTH' will add metres etc.

All this is done for us by the helper class..

class OBJECT_OT_add_cylinder(Operator, AddObjectHelper):
    """Create a new Mesh Object"""
    bl_idname = "object.add_cylinder"
    bl_label = "Add Mesh Object"
    bl_options = {'REGISTER', 'UNDO'}

    # set other args like name and description for all
    vertices : IntProperty(
            description="Number of Vertices",
    radius : IntProperty(default=2)
    depth : FloatProperty(default=2)

    def execute(self, context):

                # those defined in AddObjectHelper

        return {'FINISHED'}

Note: I've adjusted the classname OBJECT_OT_add_cylinderand bl_idname = "object.add_cylinder" to match desired naming convention

One issue tho is that its draw method puts its stuff first, so may need to add your own draw method to re-sort as desired

    def draw(self, context):
        layout = self.layout
        layout.prop(self, "vertices")
        layout.prop(self, "radius")
        # and so on

Other examples based on add object template



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