[vtkusers] Merging Different set of Volumes data...

Mon Nov 11 11:04:05 EST 2002

Sounds to me like you are using a Maximum Intensity Projection (MIP) function
vtkVolumeRayCastMIPFunction .... try using the Composite function
vtkVolumeRayCastCompositeFunction and see if thats not more to your
liking....john

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From: "Farshid Dehmeshki" <farshid.dehmeshki at medicsight.com>@public.kitware.com
on 11/08/2002 02:36 PM GMT

                                   "Farshid Dehmeshki"           To:   <twtan at cheerful.com>                 
 <farshid.dehmeshki at medicsight.com>@public.kitware.com           Cc:   "VTKUSER (E-mail)"                   
                                                              <vtkusers at public.kitware.com> (bcc: John      
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           Sent by:  vtkusers-admin at public.kitware.com   Subject:      RE: [vtkusers] Merging Different set 
                                   11/08/2002 09:36 AM        of Volumes data...                            

Hi ;
I think your problem is not because of adding volumes.
I have the same problem even when I have just one volume.
as my understanding that is depend to opacity value.
when I have one volume and I try to look at the volume from behind, still it is
similar to look at front, in the other hand when I rotate 180 degree volume
doesn't change.
any  idea?

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Farshid  Dehmeshki
Software Engineer
Medicsight Plc
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London
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Fax: 020 7598 4071
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-----Original Message-----
From: Kevin Tiow Wee TAN [mailto:twtan at cheerful.com]
Sent: 08 November 2002 14:04
To: vtkusers at public.kitware.com
Subject: [vtkusers] Merging Different set of Volumes data...

Hi,
How are you?

I had about 5 set of volumes data to be merged into one single Renderer
Window.  Each set volumes are merge in the different of x,y and z
position.

I used Renderer.AddVolume method to add each set of them individually at
different time into the same renderer.  By using Reader.SetTransform
method to move those set of volume to specific position.

The reason of using AddVolume method is each individual volume will have
different set of RGB/Opacity transfer values.

The problem is I found that, when I turn the volumes around, the volume
that I added LATER always seems to stand in front of the volume I added
ealier.  Even I turn the Interactor 180 degree, the later added volume
still seems to stand in front, rather move behind...

Any idea why???  If you have any other better method to load 5 set of
volumes at different time rather than using 5 times of AddVolume method,
please do also advice me...

--
Thanks
Kevin
**********************************
Manchester Material Science Centre
University of Manchester
----------------------------------
Centre for Virtual Environments
University of Salford
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