[vtkusers] selective scaling in vtkAssembly

[Dean Inglis]

Hi Angela!

I am tried something like that, but it fails for this
case.  I am trying to change the appearance of
vtkCheckerboardRepresentation which uses 4 internal vtkSliderWidgets
with their representations being vtkSliderRepresentation3D.
For images that have rectangular shapes (not square), two
of the sliders will appear scaled smaller than the other two
since they scale according to length.  I was trying to interrupt
that scaling by a callback but this is not the "right" way
to do it apparently.

thnx,
Dean

-----Original Message-----
From: Noecker, Angela M. [mailto:noeckera at ccf.org]
Sent: Monday, March 19, 2007 2:03 PM
To: Dean Inglis
Subject: RE: [vtkusers] selective scaling in vtkAssembly


Hey Dean!

couldn't you do something like the following:?

apply actor2_transform to actor2

actor2_transform Scale [expr wx_different/wx] 1 1

Then you effectively undo the x-component of the scale applied to the
assembly and replace it with the scale you want to have applied to actor2.

Angela





From: vtkusers-bounces+noeckera=ccf.org at vtk.org on behalf of Dean Inglis
Sent: Mon 3/19/2007 1:56 PM
To: vtkusers archive
Subject: [vtkusers] selective scaling in vtkAssembly


I have an assembly made of actors
defined on a unit length scale (0-1)
which are then scaled up to the size they
need to be in the world.  However, I want
one of the actors to have a different X scale
factor.  e.g.:

actor1->SetScale(x1,y1,z1);
actor2->SetScale(x2,y2,z2);
...
actorN->SetScale(xN,yN,zN);

assembly->SetScale(wx, wy, wz)

but for only actor2, I want the assembly to
apply a scale

assembly->SetScale(wx_different, wy, wz)

Any ideas on how to do this?

thanks,
Dean
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