[vtkusers] Where is the actors matrix being saved?

[Ambar C]

But this method (of using a trackball actor, and setting/getting the
usertransform for the actor) would be the ideal way to record mouse
driven motions on a rendererWindow, right?

A

On Fri, Oct 1, 2010 at 3:25 PM, David Doria <daviddoria at gmail.com> wrote:
> On Fri, Oct 1, 2010 at 6:23 PM, Ambar C <ambarc at gmail.com> wrote:
>>
>> I'm not sure I follow what you mean by 'storing Position and
>> Orientation'. If I set the initial position and orientation, and if
>> the usertransform is built when I call it from the position and
>> orientation, which have in turn been modified by the user's mouse,
>> then why would I need to store those two? Wouldn't that already have
>> been done within the structure of the actor? What I'm confused about
>> is, at what time can I call for a valid userTransform?
>
> I believe the userTransform is only set if you SetUserTransform or
> SetUserMatrix. The interactorStyle subclasses do not modify it.
> David