[Paraview] Carpet plots in paraview

[Berk Geveci]

Load the 2D grid  as a structured grid and warp it (not WarpVector,
WarpScalar). If the data is image data or rectilinear grid, you have to 
convert it to a structured grid. Currently there is no filter that does
this but it is easy to write one.

On Fri, 2004-02-20 at 14:10, Wylie, Brian wrote:
> All,
> 
> Anyone know how to do carpet plots in ParaView?  (By this I mean a 2
> dimensional grid, and then displacing in the z direction based on a scalar
> variable).
> 
> 	Brian Wylie
> 	Sandia National Laboratories
> 	MS 0822 - Org 9227 - Building 880/A1-J
>      (505) 844-2238   FAX (505) 845-0833
> 
> 
> -----Original Message-----
> From: Hari Sundar [mailto:hsundar at caip.rutgers.edu] 
> Sent: Thursday, February 19, 2004 6:20 PM
> To: Luis Ibanez
> Cc: ParaView at paraview.org
> Subject: Re: [Paraview] Re: Visualizing Vector Fields ...
> 
> 
> Hi Luis,
> 
> thanks, it works. I was wondering if it was possible to visualize the
> deformation field as a deformed grid., i.e., zero deformation means a normal
> structured grid, and to this I apply my deformation field.
> 
> Is this possible in Paraview ?
> 
> thanks,
> -Hari
> 
> On Thu, 19 Feb 2004, Luis Ibanez wrote:
> 
> >
> > Hi Hari,
> >
> >
> > You probably are using now ParaView 1.2.1
> > (which is an updated release).
> >
> >        http://www.paraview.org
> >
> >
> > A couple of things have changed in ParaView since
> > the message below was posted in december 2003.
> >
> >
> > For example:
> >
> >
> > 1) Now you can read MetaImage fileformat directly
> >     (they can contain scalar or vector images)
> >
> > 2) ExtractVOI is now called ExtractGrid
> >     (as you already noticed)
> >
> >
> > The simple way of visualizing deformation fields now is to load your 
> > MetaImage file containing the vector image and directly select the 
> > filter "Glyph", and in the options of the glyph filter set:
> >
> >    a) Orient Mode = Vector
> >    b) Scale Mode  = Vector Magnitude
> >    c) Scale Factor = play with this value to scale your vectors
> >
> >
> > The reason for using ExtractGrid is to subsample the original vector 
> > image. This is only needed if your deformation field has a large 
> > number of pixels (~ high resolution). Otherwise you can simply use the 
> > Glyph filter connected directly at the output of the reader.
> >
> >
> >
> > Please let us know if you find any problems.
> >
> >
> >
> > Thanks
> >
> >
> >     Luis
> >
> >
> >
> > -------------------------
> >
> >
> > Hari Sundar wrote:
> >
> >  > Hi,
> >  >
> >  > I have been using ITK to output some deformation fields and tried 
> > to use  > paraview to visualize the deformation vectors. I based this 
> > on this post  > by Luis Ibanez  >
> >  > http://www.itk.org/pipermail/insight-users/2003-December/005865.html
> >  >
> >  > However, I have been unable to get this to work properly. Firstly, I do
> >  > not get an option to set the scale mode to scalar. I tried all the
> other
> >  > options and still don't see anything. If I set the scale to "Dat
> Scaling
> >  > Off", I can see the allows, but they are all aligned in the same
> > direction
> >  > (+ve X axis). My deformation fields are all right, because I wrote it
> out
> >  > like and image (x,y,z = r,g,b) and it does display something ...
> >  >
> >  > What do I need for the glyph to display properly.
> >  >
> >  > thanks,
> >  > -Hari
> >  >
> >  > PS: I used ExtractGrid in place of ExtractVOI.
> >  >
> >
> >
> >
> >
> >
> > _______________________________________________
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> > ParaView at paraview.org 
> > http://www.paraview.org/mailman/listinfo/paraview
> >
> 
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-- 
Berk Geveci <berklist at nycap.rr.com>