Graphics Reference
In-Depth Information
bpy.utils.unregister_module(__name__)
bpy.types.INFO_MT_add.remove(menu_func)
These are almost identical to what you saw in the previous example, just somewhat more generalized. The
biggest difference is that we are calling
bpy.utils.register_module()
(and the corresponding
un-
register
function) instead of
bpy.utils.register_class()
. This is simply a more general way to
write the same thing. If we have multiple classes in the module, all of the classes will be registered. For that
reason,ratherthanaspecificclassnameastheargument,thespecialvariable
__name__
isused,whichreturns
the name of the current module (i.e., this script) itself.
menu_func()
The next lines in the function send the function
menu_func()
to be added to the interface (or removed from
it, in the case of
unregister
).
def menu_func(self, context):
self.layout.operator(Bouncing_Cone.bl_idname,
icon='MESH_CONE')
This connects the operator, referred to by its
bl_idname
property value to the menu item in the interface.
Itplaces
MESH_CONE
astheicononthemenu.Theiconisborrowedfromthemenuitemforaddingaprimitive
meshcone.Notethatwiththemultilinefunction
()
,youcanhaveasmuchoraslittlewhitespaceonthesecond
lines as you want. However, it's preferable to format it with previous lines for readability.
The Main Class
Moving on to the definition of the
Bouncing_Cone
class, you can see that creating the class begins just as
in the previous examples.
Bouncing_Cone
will inherit class properties from
bpy.types.Operator
and
AddObjectHelper
:
class Bouncing_Cone(bpy.types.Operator, AddObjectHelper):
"""Add a bouncing colored cone"""
The standard variables for operators are declared and given values:
bl_idname = "object.bouncing_cone_add"
bl_label = "Bouncing Cone"
bl_description = "Add a bouncing cone"
bl_options = {'REGISTER', 'UNDO'}
The
scale
value from the default Add Object template is included. There's no real need to delete it, al-
though you may not choose to use it. The
scale
code looks like this:
scale = FloatVectorProperty(name='scale',
default=(1.0, 1.0, 1.0),
subtype='TRANSLATION',
description='scaling')
Height, Radius, Bounce, and Color Properties
Next, you're going to add a few properties specific to the bouncing cone object. We want to be able to set the
height of the cone, the radius of the cone base, the speed and height that the cone bounces, and the color of the
