[vtkusers] Apply one transformation matrix to an other actor

[David Cole]

UserMatrix is one you can assign yourself to an actor or a top-level composite assembly of actors.

Matrix is computed automatically from any position, rotation or scale the actor may have, in addition to the UserMatrix.

Calling GetMatrix should always give you the exact matrix applied to an actor to get it to from whatever its own "model space" is to VTK world space.

UserMatrix is nullptr until you set it, or until the actor is added as part of an assembly, where the parent assembly may set user matrices directly for its constituent parts.

You can't set the matrix directly, but you can set the UserMatrix directly.


David


> On Nov 12, 2015, at 11:09 AM, Lonni Besançon <lonni.besancon at gmail.com> wrote:
> 
> My bad works like a charm in the end. It was a problem on my side.
> Was wondering however what the difference was between the GetUserMatrix()
> and GetMatrix(), which brings in fact the question of the difference between
> UserMatrix and Matrix.
> 
> 
> 
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