[vtkusers] Please Help
rahul indoria
rahulindoria5 at gmail.com
Mon Jun 24 11:49:27 EDT 2013
*Hi,
I am new on vtk, my question is :
are the mappers and filters same thing in VTK?
Looking forward your reply soon.
*
*
*
*Regards*
*
*
*rahul indoria*
On Mon, Jun 24, 2013 at 5:41 PM, <vtkusers-request at vtk.org> wrote:
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> Today's Topics:
>
> 1. Re: vtkusers Digest, Vol 110, Issue 31 (rahul indoria)
> 2. Re: Plane polydata intersection (Laurent Chauvin)
> 3. Re: synchronous update between vtkImagePlaneWidget and
> vtkResliceCursorWidget (Dean Inglis)
> 4. Re: Plane polydata intersection (Cory Quammen)
> 5. Re: Plane polydata intersection (Laurent Chauvin)
> 6. Re: vtkborderwidget in vtk6.0rc3 (David Cole)
> 7. Re: building vtk6, simple example (Marcus D. Hanwell)
> 8. Re: Render Control (David Cole)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 24 Jun 2013 16:16:46 +0200
> From: rahul indoria <rahulindoria5 at gmail.com>
> Subject: Re: [vtkusers] vtkusers Digest, Vol 110, Issue 31
> To: vtkusers at vtk.org
> Message-ID:
> <
> CAGQ+16J9HaSHfsxzKBM7Bv08fqqEYv07Tpq7SQRU2QLN+Peajg at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
> I am new on vtk, my question is :
>
> are the mappers and filters same thing in VTK?
>
> Looking forward your reply soon.
>
>
> On Mon, Jun 24, 2013 at 4:04 PM, <vtkusers-request at vtk.org> wrote:
>
> > Send vtkusers mailing list submissions to
> > vtkusers at vtk.org
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> > http://www.vtk.org/mailman/listinfo/vtkusers
> > or, via email, send a message with subject or body 'help' to
> > vtkusers-request at vtk.org
> >
> > You can reach the person managing the list at
> > vtkusers-owner at vtk.org
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of vtkusers digest..."
> >
> >
> > Today's Topics:
> >
> > 1. Re: Plane polydata intersection (Cory Quammen)
> > 2. Re: Plane polydata intersection (Laurent Chauvin)
> > 3. vtkLineWidget with fix length (manzohar)
> > 4. Problems building the Piston Library (UJJWAL aryan)
> > 5. Re: Draw points with gaussian fade out (Michka Popoff)
> > 6. Re: Render Control (David Cole)
> > 7. Re: Render Control (Max)
> > 8. VTK build with postfix d : error (Ashish Singh)
> > 9. Re: VTK build with postfix d : error (Ashish Singh)
> > 10. Generating a polyhedron cell from polydata in Python
> > (Gu?ni Karl Rosenkj?r)
> > 11. building vtk6, simple example (Randy Heiland)
> > 12. vtkborderwidget in vtk6.0rc3 (chasank)
> > 13. Re: Plane polydata intersection (Cory Quammen)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sun, 23 Jun 2013 12:31:56 -0400
> > From: Cory Quammen <cquammen at cs.unc.edu>
> > Subject: Re: [vtkusers] Plane polydata intersection
> > To: Laurent Chauvin <lchauvin at bwh.harvard.edu>
> > Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> > Message-ID:
> > <
> > CANmPiKCPp3VM6moALR0XB2Rx2OkHQk_9R339ntO+AVgqhJHoFw at mail.gmail.com>
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Laurent,
> >
> > For this special case of computing the intersection between a polydata
> > and a plane, you can use a little trick. First, you can compute a new
> > point data set for your polydata with,say, the z coordinates of each
> > point in the polydata. Then, to get the intersection with an xy plane,
> > you then use the vtkContourFilter operating on this coordinate point
> > data and specify the z value that corresponds to your plane. The
> > result should be equivalent to the intersection of the polydata with
> > that plane.
> >
> > It should be relatively fast to compute the contour, so you can
> > probably do this interactively.
> >
> > Hope that helps,
> > Cory
> >
> > On Sat, Jun 22, 2013 at 2:46 PM, Laurent Chauvin
> > <lchauvin at bwh.harvard.edu> wrote:
> > > Hello,
> > >
> > > I'm working on Slicer, and I was trying to find a nice way to display
> > > intersection between polydata and a plane.
> > > I read we could use a vtkCutter, but the thing is, I would like to do
> > this
> > > interactively. I want to be able to move the plane, and update the
> > > intersection while moving the plane.
> > > I'm not sure using vtkCutter for this purpose would work. I think
> > vtkCutter
> > > will take some times to execute, then moving the plane will be slow.
> > >
> > > I know this question has been asked before, but I would like if there
> > were
> > > some update since then. New widgets or object that I could use for
> that ?
> > >
> > > I was thinking using vtkImageReslice, get polydata of the plane and
> > compute
> > > the intersection between the 2 polydata, but I think it would also be
> to
> > > computing intensive to be able to do it smoothly with an interactive
> > plane.
> > >
> > > Thank you.
> > > -Laurent
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Powered by www.kitware.com
> > >
> > > Visit other Kitware open-source projects at
> > > http://www.kitware.com/opensource/opensource.html
> > >
> > > Please keep messages on-topic and check the VTK FAQ at:
> > > http://www.vtk.org/Wiki/VTK_FAQ
> > >
> > > Follow this link to subscribe/unsubscribe:
> > > http://www.vtk.org/mailman/listinfo/vtkusers
> > >
> >
> >
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Sun, 23 Jun 2013 12:41:39 -0400
> > From: Laurent Chauvin <lchauvin at bwh.harvard.edu>
> > Subject: Re: [vtkusers] Plane polydata intersection
> > To: Cory Quammen <cquammen at cs.unc.edu>
> > Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> > Message-ID:
> > <
> > CAPGPbaJZGVNO-vzOjuYr6532VHOZhc2nd8ncEV+c14_2qWNxng at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi Cory,
> >
> > Thank you very much for your reply.
> > However, I'm not sure to understand what you mean.
> > Should I create a new polydata with all points at the same z coordinates
> ?
> >
> > Does this work with some oblique planes ( not parallel to x,y, or z axis
> )
> > ?
> >
> > Thank you.
> > -Laurent
> >
> >
> > On Sun, Jun 23, 2013 at 12:31 PM, Cory Quammen <cquammen at cs.unc.edu>
> > wrote:
> >
> > > Laurent,
> > >
> > > For this special case of computing the intersection between a polydata
> > > and a plane, you can use a little trick. First, you can compute a new
> > > point data set for your polydata with,say, the z coordinates of each
> > > point in the polydata. Then, to get the intersection with an xy plane,
> > > you then use the vtkContourFilter operating on this coordinate point
> > > data and specify the z value that corresponds to your plane. The
> > > result should be equivalent to the intersection of the polydata with
> > > that plane.
> > >
> > > It should be relatively fast to compute the contour, so you can
> > > probably do this interactively.
> > >
> > > Hope that helps,
> > > Cory
> > >
> > > On Sat, Jun 22, 2013 at 2:46 PM, Laurent Chauvin
> > > <lchauvin at bwh.harvard.edu> wrote:
> > > > Hello,
> > > >
> > > > I'm working on Slicer, and I was trying to find a nice way to display
> > > > intersection between polydata and a plane.
> > > > I read we could use a vtkCutter, but the thing is, I would like to do
> > > this
> > > > interactively. I want to be able to move the plane, and update the
> > > > intersection while moving the plane.
> > > > I'm not sure using vtkCutter for this purpose would work. I think
> > > vtkCutter
> > > > will take some times to execute, then moving the plane will be slow.
> > > >
> > > > I know this question has been asked before, but I would like if there
> > > were
> > > > some update since then. New widgets or object that I could use for
> > that ?
> > > >
> > > > I was thinking using vtkImageReslice, get polydata of the plane and
> > > compute
> > > > the intersection between the 2 polydata, but I think it would also be
> > to
> > > > computing intensive to be able to do it smoothly with an interactive
> > > plane.
> > > >
> > > > Thank you.
> > > > -Laurent
> > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Powered by www.kitware.com
> > > >
> > > > Visit other Kitware open-source projects at
> > > > http://www.kitware.com/opensource/opensource.html
> > > >
> > > > Please keep messages on-topic and check the VTK FAQ at:
> > > > http://www.vtk.org/Wiki/VTK_FAQ
> > > >
> > > > Follow this link to subscribe/unsubscribe:
> > > > http://www.vtk.org/mailman/listinfo/vtkusers
> > > >
> > >
> > >
> > >
> > > --
> > > Cory Quammen
> > > Research Associate
> > > Department of Computer Science
> > > The University of North Carolina at Chapel Hill
> > >
> >
> >
> >
> > --
> > Laurent Chauvin, MS
> > Surgical Navigation and Robotics Laboratory, Radiology
> > Brigham And Women's Hospital, Harvard Medical School
> > http://wiki.ncigt.org/index.php/User:Lchauvin
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
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> >
> http://www.vtk.org/pipermail/vtkusers/attachments/20130623/42b4458e/attachment-0001.htm
> > >
> >
> > ------------------------------
> >
> > Message: 3
> > Date: Sun, 23 Jun 2013 10:42:03 -0700 (PDT)
> > From: manzohar <lancia58 at gmail.com>
> > Subject: [vtkusers] vtkLineWidget with fix length
> > To: vtkusers at vtk.org
> > Message-ID: <1372009323193-5721537.post at n5.nabble.com>
> > Content-Type: text/plain; charset=us-ascii
> >
> > Is there a way to fix the length of the line of vtkLineWidget ?
> >
> > Thanks
> > Zohar
> >
> >
> >
> > --
> > View this message in context:
> >
> http://vtk.1045678.n5.nabble.com/vtkLineWidget-with-fix-length-tp5721537.html
> > Sent from the VTK - Users mailing list archive at Nabble.com.
> >
> >
> > ------------------------------
> >
> > Message: 4
> > Date: Mon, 24 Jun 2013 00:21:27 +0530
> > From: UJJWAL aryan <meetukme at gmail.com>
> > Subject: [vtkusers] Problems building the Piston Library
> > To: vtkusers at vtk.org
> > Message-ID:
> > <CAJdiYKDwMO94-r6dcmnehJhgV76R1=n9bXE4d=
> > SX0iR-iA0Dgw at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi All,
> >
> > I was trying to install *vtk 6.0.0.rc3* on my system and it was showing
> the
> > error PISTON_INCLUDE_DIR NOT FOUND. So, I decided to download and install
> > LANL's piston library (http://viz.lanl.gov/projects/PISTON.html) . While
> > building the Piston Library , it gave the following error :-
> >
> > *nvcc fatal : A single input file is required for a non-link phase when
> > an outputfile is specified. CMake Error at
> > tutorial1GPU_generated_tutorial1.cu.o.cmake:206 (message):*
> > * Error generating
> >
> >
> /usr/local/piston/build/tutorial/CMakeFiles/tutorial1GPU.dir//./tutorial1GPU_generated_tutorial1.cu.o
> > *
> >
> > So, I opened *tutorial1GPU_generated_tutorial1.cu.o.cmake *in Vim and on
> > line 80 i noticed something unusual. I noticed that in
> > set(CUDA_NVCC_INCLUDE_ARGS ... only a part of the string was displayed in
> > red while remaining part was simple white. The line was very long and i
> > think, that after a certain number of characters like 5000 or so, the
> > system was not recognizing any other character as a string.
> >
> > I am not sure but maybe that is the source of the problem. Kindly take a
> > look into it and enlighten. I am attaching the *
> > tutorial1GPU_generated_tutorial1.cu.o.cmake *with this mail.
> >
> > --
> > Ujjwal
> > IIIT Hyderabad
> > -------------- next part --------------
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> >
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> > >
> >
> > ------------------------------
> >
> > Message: 5
> > Date: Sun, 23 Jun 2013 23:47:08 +0200
> > From: Michka Popoff <michkapopoff at gmail.com>
> > Subject: Re: [vtkusers] Draw points with gaussian fade out
> > To: "Biddiscombe, John A." <biddisco at cscs.ch>
> > Cc: vtkusers <vtkusers at vtk.org>
> > Message-ID: <00C39685-9939-41E3-9EC7-75C462824A91 at gmail.com>
> > Content-Type: text/plain; charset="windows-1252"
> >
> > Thank you for the code. I looked at the pictures, it seems to do what I
> > want.
> >
> > I am trying to install it but my knowledge is quite limited. As I
> > understand I can build it without recompiling the whole VTK ? Hope I can
> > get python bindings for it.
> >
> > I launched cmake on the folder, I got the two following errors :
> >
> > 1)
> >
> > CMake Error at CMakeLists.txt:8 (INCLUDE):
> > include could not find load file:
> > CMakeMacros_CSCS.cmake
> >
> > I was not able to find this file. I looked on the internet, and
> downloaded
> > some old Paraview and VTK's from 2006/2007, but was not able to find the
> > file.
> > So I removed the call to this file.
> >
> > 2)
> >
> > CMake Error at CMakeLists.txt:93 (VTK_MAKE_INSTANTIATOR3):
> > Unknown CMake command "VTK_MAKE_INSTANTIATOR3".
> >
> > Apparently this is due because VTK_MAKE_INSTANTIATOR3 is no more needed,
> > so I also removed the line calling it.
> >
> > Now the cmake is able to finish it's configuration.
> >
> >
> > Then I did a "make" and got the following error :
> >
> > In file included from
> >
> /Users/michkapopoff/Desktop/vtkCSCSPointSprites/vtkPointSpriteMapper.h:51:
> > /Users/michkapopoff/Desktop/build/vtkCSCSPointSpritesConfigure.h:7:5:
> > error: expected value in expression
> > #if
> > ^
> > In file included from
> >
> /Users/michkapopoff/Desktop/vtkCSCSPointSprites/vtkPointSpriteMapper.cpp:33:
> >
> /Users/michkapopoff/Desktop/vtkCSCSPointSprites/vtkPointSpriteMapper.h:52:10:
> > fatal error: 'vtkPainterPolyDataMapper.h' file not found
> > #include "vtkPainterPolyDataMapper.h"
> > ^
> > 2 errors generated.
> > make[2]: *** [CMakeFiles/vtkCSCSPointSprites.dir/vtkPointSpriteMapper.o]
> > Error 1
> > make[1]: *** [CMakeFiles/vtkCSCSPointSprites.dir/all] Error 2
> > make: *** [all] Error 2
> >
> > So it doesn't' find my include did, so I need to add the path to the
> > INCLUDE_DIRECTORIES.
> > I added the path directly with SET(). Perhaps not the cleanest solution
> > but it worked :
> >
> > SET( CSCS_POINTSPRITES_INCLUDE_DIRS
> > ${PROJECT_SOURCE_DIR}
> > ${PROJECT_BINARY_DIR}
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10
> > )
> >
> > So, next I got this error :
> >
> > /Users/michkapopoff/Desktop/build/vtkCSCSPointSpritesConfigure.h:7:5:
> > error: expected value in expression
> > #if
> > ^
> > In file included from
> >
> /Users/michkapopoff/Desktop/vtkCSCSPointSprites/vtkPointSpriteMapper.cpp:33:
> > In file included from
> >
> /Users/michkapopoff/Desktop/vtkCSCSPointSprites/vtkPointSpriteMapper.h:52:
> > In file included from
> >
> /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkPainterPolyDataMapper.h:25:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkPolyDataMapper.h:25:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkMapper.h:55:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkAbstractMapper3D.h:32:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkAbstractMapper.h:28:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkAlgorithm.h:32:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkObject.h:41:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkObjectBase.h:43:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkIndent.h:24:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkSystemIncludes.h:40:
> > In file included from
> > /usr/local/Cellar/vtk/5.10.1/include/vtk-5.10/vtkIOStream.h:108:
> > In file included from /usr/include/c++/4.2.1/backward/strstream:51:
> > /usr/include/c++/4.2.1/backward/backward_warning.h:32:2: warning: This
> > file includes at least one deprecated or antiquated header. Please
> consider
> > using one of the 32 headers found in section 17.4.1.2 of the C++
> > standard. Examples include substituting the <X> header for the <X.h>
> header
> > for
> > C++ includes, or <iostream> instead of the deprecated header
> > <iostream.h>. To disable this warning use -Wno-deprecated. [-W#warnings]
> > #warning This file includes at least one deprecated or antiquated
> header. \
> > ^
> > 1 warning and 1 error generated.
> > make[2]: *** [CMakeFiles/vtkCSCSPointSprites.dir/vtkPointSpriteMapper.o]
> > Error 1
> > make[1]: *** [CMakeFiles/vtkCSCSPointSprites.dir/all] Error 2
> > make: *** [all] Error 2
> >
> > Perhaps you have an idea for this one ?
> >
> > Thanks in advance
> >
> > Michka Popoff
> >
> >
> > On 21 juin 2013, at 14:39, "Biddiscombe, John A." <biddisco at cscs.ch>
> > wrote:
> >
> > > I?m attaching a very set of code from the original cvs repo that had
> the
> > point sprite mapper. You should be able to compiled this against vtk, but
> > not that the dates on the files go back to 2006, so you may need to
> update
> > stuff
> > >
> > > JB
> > >
> > > From: Michka Popoff [mailto:michkapopoff at gmail.com]
> > > Sent: 20 June 2013 15:36
> > > To: vtkusers
> > > Cc: Biddiscombe, John A.; Markus Neuner
> > > Subject: Re: [vtkusers] Draw points with gaussian fade out
> > >
> > > Thanks for your answers,
> > >
> > > I try to fight my way through vtkFastSplatter, but there is only one
> > example and I do not understand everything. (The documentation is a
> little
> > sparse)
> > > The example in the docs use a vtkImageViewer2,and I want to have a
> > vtkactor to put it in my 3d scenery.
> > > So I mapped the splatter on a vtkplane through a vtktexture (to be able
> > to have a vtkactor). Hope this will not lead to performance problems
> once I
> > try to display millions of vtkactors ...
> > > It's also not really working, the colors are messed up, and I don't
> > understand the vtkpoints usage for the vtkFastSplatter.
> > >
> > > 5 points are used in the example, which display 5 splats, but I was not
> > able to have only one splat centered in the middle (even using only 1
> > point, at 0,0,0).
> > >
> > >
> > > For vtkPointSpriteMapper, is not in vtk, so I have to find the way to
> > take it from paraview, add it to vtk, and make the python bindings for
> it.
> > Any idea how to achieve this ?
> > >
> > >
> > > Regards
> > >
> > > Michka
> > >
> > >
> > > Le 19 juin 2013 ? 23:29, Biddiscombe, John A. a ?crit :
> > >
> > > Try googling vtkPointSpriteMapper
> > > A modified version using painters is in paraview, but the original was
> > designed for straight vtk use.
> > >
> > > JB
> > > (apologies if you get multiple copies of this, email misfired)
> > >
> > >
> > > Le 19 juin 2013 ? 19:57, Markus Neuner a ?crit :
> > >
> > >
> > > Hi,
> > >
> > > oh vtkGaussianSplatter is the wrong class. It generates a volume, but
> > you could visualize it with volume rendering.
> > >
> > > The first version is basically what FastSplatter does (
> > http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/FastSplatter).
> > >
> > > For the second version i can't find a class in vtk that can actually
> > does this (compute the Gaussian directly in the fragment shader).
> > >
> > > You can derive from vtkGLSLShaderProgram and implement the procedures
> > described in this examplehttp://prideout.net/blog/p60/Splat.zip written
> > by Philip Rideout.
> > >
> > > Regards,
> > > Markus
> > >
> > >
> > > On 06/16/2013 06:31 PM, Michka Popoff wrote:
> > >
> > > Hi
> > >
> > > thank you for your help.
> > >
> > > 1) For the first solution, what would be the class to use to create the
> > texture from the gaussian equation ? Once I have the textures, I could
> map
> > them to planes. I did wrote some OpenGL code a while ago where I did this
> > with a shader, billboarding the textures so that the gaussians would
> always
> > face the camera. This was very fast.
> > >
> > > 2) I saw vtkGaussianSplatter, but I don't know if I can set a different
> > radius and exponent factor for each point ? In the class these values can
> > only be set globally. I wrote some code (in python), inspired from the
> > FinancialField example from vtkGaussianSplatter, but the splats are
> passed
> > through vtkContourFilter to make a surface. I think this is messing with
> my
> > gaussians, and I don't know how to do this without vtkContourFilter. I
> > found no other example for vtkGaussianSplatter. Here is the code I wrote,
> > displaying 10x10 points :
> > >
> > > #!/usr/bin/env python
> > >
> > > import vtk
> > > from numpy import random
> > >
> > > # Create points
> > > points = vtk.vtkPoints()
> > > for i in range(10):
> > > for j in range(10):
> > > points.InsertNextPoint(i, j, 0.0)
> > >
> > > polydata = vtk.vtkPolyData()
> > > polydata.SetPoints(points)
> > >
> > > popSplatter = vtk.vtkGaussianSplatter()
> > > popSplatter.SetInput(polydata)
> > > popSplatter.SetSampleDimensions(50, 50, 50)
> > > popSplatter.SetRadius(0.05)
> > > popSplatter.ScalarWarpingOff()
> > > popSplatter.Update()
> > >
> > > popSurface = vtk.vtkContourFilter()
> > > popSurface.SetInputConnection(popSplatter.GetOutputPort())
> > > popSurface.SetValue(0, 0.01)
> > >
> > > popMapper = vtk.vtkPolyDataMapper()
> > > popMapper.SetInputConnection(popSurface.GetOutputPort())
> > > popMapper.ImmediateModeRenderingOn()
> > >
> > > popActor = vtk.vtkActor()
> > > popActor.SetMapper(popMapper)
> > >
> > > # Renderer
> > > renderer = vtk.vtkRenderer()
> > > renderer.AddActor(popActor)
> > > renderer.ResetCamera()
> > >
> > > # Render Window
> > > renderWindow = vtk.vtkRenderWindow()
> > > renderWindow.AddRenderer(renderer)
> > >
> > > # Interactor
> > > renderWindowInteractor = vtk.vtkRenderWindowInteractor()
> > > renderWindowInteractor.SetRenderWindow(renderWindow)
> > >
> > > # Begin Interaction
> > > renderWindow.Render()
> > > renderWindowInteractor.Start()
> > >
> > >
> > >
> > >
> > > On 16 juin 2013, at 11:14, Markus Neuner <neuner.markus at gmx.net>
> wrote:
> > >
> > > Hi Michka,
> > >
> > > You could try to generate volumetric data using Gaussian splats.
> > >
> > > There are two solutions to this problem:
> > > - Create the 3D Gaussian function on the CPU during application
> > initialization, and create a 3D texture from that.
> > >
> > > - But better and much faster is to compute the Gaussian directly in the
> > fragment shader.
> > >
> > > Have a look at vtkGaussianSplatter it may do what you want.
> > >
> > > Regards,
> > > Markus
> > >
> > >
> > > On 06/15/2013 05:18 PM, Michka Popoff wrote:
> > > Hi
> > >
> > > I want to draw a lot of points in VTK (~1.000.000), with each point's
> > color fading out to a transparent value, following a gaussian function.
> > > So the center will be bright (maximum intensity), and the border will
> > have no color.
> > >
> > > I am able to draw a lot of points using vtkPoints, I can also change
> > their color, but I am looking for a way to apply the fade out to every
> > point. Of course the parameters of the gaussian function will be
> different
> > for each point (intensity value in the middle, diameter).
> > >
> > > The result for 1 point would look like this :
> > http://www.princeton.edu/~rvdb/images/deconv/Gauss2Psf.jpg
> > >
> > > Are there some filters/mappers I could use directly ? Or can I perhaps
> > try to "hijack" vtkgaussiansplatter to achieve this ?
> > >
> > > Thanks in advance
> > >
> > > Michka Popoff
> > > _______________________________________________
> > > Powered by www.kitware.com
> > >
> > > Visit other Kitware open-source projects athttp://
> > www.kitware.com/opensource/opensource.html
> > >
> > > Please keep messages on-topic and check the VTK FAQ at:
> > http://www.vtk.org/Wiki/VTK_FAQ
> > >
> > > Follow this link to subscribe/unsubscribe:
> > > http://www.vtk.org/mailman/listinfo/vtkusers
> > >
> > >
> > >
> > >
> > > <vtkCSCSPointSprites.zip>
> >
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
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> >
> http://www.vtk.org/pipermail/vtkusers/attachments/20130623/56895d53/attachment-0001.htm
> > >
> >
> > ------------------------------
> >
> > Message: 6
> > Date: Mon, 24 Jun 2013 01:09:58 +0000
> > From: David Cole <dlrdave at aol.com>
> > Subject: Re: [vtkusers] Render Control
> > To: " vtkusers at vtk.org " <vtkusers at vtk.org>, Max
> > <smapersmaper at gmail.com>
> > Message-ID: <20130624011336.5098F643EA at public.kitware.com>
> > Content-Type: text/plain; charset="utf-8"
> >
> > The ?problem? is that Visual Studio is 32-bit only, so it can only show
> > the x86 build in Design Mode.
> >
> >
> > This happens because the ActiViz dll has underlying architecture-specific
> > native dlls for VTK that it loads. Since they are arch-specific and VS is
> > 32-bit only.... it can only handle the x86 dlls.
> >
> >
> >
> > Cheers (hope this helps),
> >
> > David C.
> >
> >
> >
> >
> > From: Max
> > Sent: ?Sunday?, ?June? ?23?, ?2013 ?9?:?55? ?AM
> > To: vtkusers at vtk.org
> >
> > Hi VTKers,
> > When I'm downloading the 86 bit version of activiz I see the render
> control
> > and can add it to my winforms,
> > but when i download the 64 bit activiz version, it is not shown and i
> > cannot
> > add it through the kitware dll.
> > And when i'm building 86 project the form is shown correctly, but with 64
> > bit version, it cannot show it in design mode, only the run mode.
> > Does anyone know what can be the problem?
> >
> > Thank you,
> > Max
> >
> >
> >
> > --
> > View this message in context:
> > http://vtk.1045678.n5.nabble.com/Render-Control-tp5721532.html
> > Sent from the VTK - Users mailing list archive at Nabble.com.
> > _______________________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Please keep messages on-topic and check the VTK FAQ at:
> > http://www.vtk.org/Wiki/VTK_FAQ
> >
> > Follow this link to subscribe/unsubscribe:
> > http://www.vtk.org/mailman/listinfo/vtkusers
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL: <
> >
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> > >
> >
> > ------------------------------
> >
> > Message: 7
> > Date: Sun, 23 Jun 2013 21:08:10 -0700 (PDT)
> > From: Max <smapersmaper at gmail.com>
> > Subject: Re: [vtkusers] Render Control
> > To: vtkusers at vtk.org
> > Message-ID: <1372046890508-5721541.post at n5.nabble.com>
> > Content-Type: text/plain; charset=us-ascii
> >
> > Hi David and thank you for the reply,
> > so what is the way to add the render control to the winform in 64 bit?
> > Currently what I did:
> > Installed 86 bit version of activiz,
> > installed 64 bit version of activiz,
> > then i saw the 86 bit render control in toolbox,
> > added it to the winform,
> > then i saw that it adds automatically the kitware dll 86 bit ,
> > but i need to make the vtk project 64 bit since all my application
> solution
> > works on 64 bit,
> > so i removed the 86 kitware dll and added 2 64 bit dlls, kitware dll and
> > mummy dll
> > well, it works in runtime, but it says it cannot find the kitware clr in
> > design time.
> > Also i don't think that for it to work i need to install also 86 bit
> > version
> > of activiz
> > i tried to add the control through kitware dll but it cannot find it...
> > Something is not right here i think...
> > Can you please tell me what i did wrong?
> >
> > Thank you,
> > Max
> >
> >
> >
> > --
> > View this message in context:
> > http://vtk.1045678.n5.nabble.com/Render-Control-tp5721532p5721541.html
> > Sent from the VTK - Users mailing list archive at Nabble.com.
> >
> >
> > ------------------------------
> >
> > Message: 8
> > Date: Mon, 24 Jun 2013 12:26:25 +0530
> > From: Ashish Singh <asinghmlists at gmail.com>
> > Subject: [vtkusers] VTK build with postfix d : error
> > To: vtkusers at vtk.org
> > Message-ID:
> > <
> > CAOqamVFZjnwAPrKXSAmaecXwp-tavUGyj1WowzrZ86V_v3xA7w at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi,
> >
> > 1) I am trying to build VTK5.10.1 with Qt 4.8.4 on Windows 7, x64
> platform
> > with Visual Studio 2010 with postfix 'd' option. The build goes fine
> > without any errors. I am able to run the cone example( plain VTK example)
> > using my build. But when I run the RenderWindowNoUiFile ( VTK + Qt
> > example), I get a runtime error saying -
> > "The application was unable to start correct (0xc000000d). Click OK to
> > close the application"
> >
> > 2) When I try to build "Install" for this VTK build, I get the following
> > error:
> >
> > 1> -- Up-to-date: E:/VTKDebugBin/bin/QVTKd.dll
> > 1> CMake Error at GUISupport/Qt/PluginInstall.cmake:13 (FILE):
> > 1> file INSTALL cannot find
> > "E:/VTKDebugBuild/bin/Debug/QVTKWidgetPlugin.dll".
> > 1> Call Stack (most recent call first):
> > 1> GUISupport/Qt/cmake_install.cmake:89 (INCLUDE)
> > 1> GUISupport/cmake_install.cmake:32 (INCLUDE)
> > 1> cmake_install.cmake:181 (INCLUDE)
> > 1>
> > 1>
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: The command "setlocal
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: "C:\Program Files (x86)\CMake 2.8\bin\cmake.exe"
> > -DBUILD_TYPE=Debug -P cmake_install.cmake
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: if %errorlevel% neq 0 goto :cmEnd
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: :cmEnd
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: :cmErrorLevel
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: exit /b %1
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: :cmDone
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: if %errorlevel% neq 0 goto :VCEnd
> > 1>C:\Program Files
> > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> error
> > MSB3073: :VCEnd" exited with code 1.
> > 1>
> > 1>Build FAILED.
> > 1>
> > 1>Time Elapsed 00:00:10.95
> > ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped
> ==========
> >
> > Can anyone please help me figure out what is going wrong here and how to
> > fix these 2 issues?
> >
> > The details of my environment are:
> > VTK version: 5.10.1
> > Qt: 4.8.4
> > OS: windows 7 64 bit
> > Visual Studio 2010
> >
> > Thanks,
> > Ashish
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL: <
> >
> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/e052c949/attachment-0001.htm
> > >
> >
> > ------------------------------
> >
> > Message: 9
> > Date: Mon, 24 Jun 2013 13:45:40 +0530
> > From: Ashish Singh <asinghmlists at gmail.com>
> > Subject: Re: [vtkusers] VTK build with postfix d : error
> > To: vtkusers at vtk.org
> > Message-ID:
> > <CAOqamVG9VOK+iG=CnpFDbxq8TWjVmjMbR+=
> > W7aimJ5JHPZkH4w at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > I am replying to my own post. For issue # 2, I checked file
> > GUISupport/Qt/PluginInstall.cmake
> >
> > The contents of this file are as follows:
> > ----
> > # Configured file and directory locations.
> > SET(VTK_LIB_DIR "E:/VTKDebugBuild/bin")
> > SET(VTK_INSTALL_QT_DIR "/plugins/designer")
> > SET(VTK_INSTALL_QT_PLUGIN_DIR
> > "${CMAKE_INSTALL_PREFIX}${VTK_INSTALL_QT_DIR}")
> > SET(VTK_INSTALL_QT_PLUGIN_FILE "QVTKWidgetPlugin.dll")
> > SET(VTK_CONFIGURATIONS "Debug;Release;MinSizeRel;RelWithDebInfo")
> >
> > IF(VTK_CONFIGURATIONS)
> > SET(VTK_LIBSUBDIR "/${BUILD_TYPE}")
> > ENDIF(VTK_CONFIGURATIONS)
> >
> > # Install the file to the specified location.
> > FILE(INSTALL DESTINATION "${VTK_INSTALL_QT_PLUGIN_DIR}" TYPE
> SHARED_LIBRARY
> > FILES "${VTK_LIB_DIR}${VTK_LIBSUBDIR}/${VTK_INSTALL_QT_PLUGIN_FILE}")
> > ----
> > If we look at line :
> > SET(VTK_INSTALL_QT_PLUGIN_FILE "QVTKWidgetPlugin.dll")
> >
> > we see that it is looking for file "QVTKWidgetPlugin.dll". But since, I
> > already added a postfix d, it cannot find this file and therefore is
> giving
> > errors. If I change the file name to QVTKWidgetPlugind.dll, the build
> > "Install" step succeeds.
> >
> > Is this a bug?
> >
> > Issue # 1, still remains. I am still not able to run the
> > RenderWindowNoUiFile example after adding postfix d.
> >
> > Can anyone please help?
> >
> > Thanks,
> > Ashish
> >
> > On Mon, Jun 24, 2013 at 12:26 PM, Ashish Singh <asinghmlists at gmail.com
> > >wrote:
> >
> > > Hi,
> > >
> > > 1) I am trying to build VTK5.10.1 with Qt 4.8.4 on Windows 7, x64
> > platform
> > > with Visual Studio 2010 with postfix 'd' option. The build goes fine
> > > without any errors. I am able to run the cone example( plain VTK
> example)
> > > using my build. But when I run the RenderWindowNoUiFile ( VTK + Qt
> > > example), I get a runtime error saying -
> > > "The application was unable to start correct (0xc000000d). Click OK to
> > > close the application"
> > >
> > > 2) When I try to build "Install" for this VTK build, I get the
> following
> > > error:
> > >
> > > 1> -- Up-to-date: E:/VTKDebugBin/bin/QVTKd.dll
> > > 1> CMake Error at GUISupport/Qt/PluginInstall.cmake:13 (FILE):
> > > 1> file INSTALL cannot find
> > > "E:/VTKDebugBuild/bin/Debug/QVTKWidgetPlugin.dll".
> > > 1> Call Stack (most recent call first):
> > > 1> GUISupport/Qt/cmake_install.cmake:89 (INCLUDE)
> > > 1> GUISupport/cmake_install.cmake:32 (INCLUDE)
> > > 1> cmake_install.cmake:181 (INCLUDE)
> > > 1>
> > > 1>
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: The command "setlocal
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: "C:\Program Files (x86)\CMake 2.8\bin\cmake.exe"
> > > -DBUILD_TYPE=Debug -P cmake_install.cmake
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: if %errorlevel% neq 0 goto :cmEnd
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: :cmEnd
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: :cmErrorLevel
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: exit /b %1
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: :cmDone
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: if %errorlevel% neq 0 goto :VCEnd
> > > 1>C:\Program Files
> > > (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(113,5):
> > error
> > > MSB3073: :VCEnd" exited with code 1.
> > > 1>
> > > 1>Build FAILED.
> > > 1>
> > > 1>Time Elapsed 00:00:10.95
> > > ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped
> > ==========
> > >
> > > Can anyone please help me figure out what is going wrong here and how
> to
> > > fix these 2 issues?
> > >
> > > The details of my environment are:
> > > VTK version: 5.10.1
> > > Qt: 4.8.4
> > > OS: windows 7 64 bit
> > > Visual Studio 2010
> > >
> > > Thanks,
> > > Ashish
> > >
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
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> >
> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/f3ff4e48/attachment-0001.htm
> > >
> >
> > ------------------------------
> >
> > Message: 10
> > Date: Mon, 24 Jun 2013 09:13:26 +0000
> > From: Gu?ni Karl Rosenkj?r <grosenkj at eos.ubc.ca>
> > Subject: [vtkusers] Generating a polyhedron cell from polydata in
> > Python
> > To: VTKusers <vtkusers at vtk.org>
> > Message-ID:
> > <CAOqTh=
> > m3A110FVXoHTb77wU3CvdFNcOHqaF0kCVP1TJvy-WE5w at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hello all vtk users,
> >
> > I am trying to make a polyhedron cell (vtkUnstructuredGrid) from a
> > polydata. Googling for information on how to do this I have found these
> C++
> > test and used the as a guide.
> >
> > However when I run my code on Fedora 17 64bit, using python 2.7.3 and vtk
> > 5.10.1 (self compiled), I get an error when using InsertNextCell call of
> > the vtkUnstructuredGrid object.
> >
> > Here is a example code I am using:
> > import vtk
> >
> > # Read the polyData
> > cube = vtk.vtkCubeSource()
> > Poly = cube.GetOutput()
> >
> > # Extract the information needed from the poly data
> > numPts = vtk.vtkIdTypeArray()
> > numPts.InsertNextValue(Poly.GetNumberOfPoints())
> > ptsIds = vtk.vtkIdTypeArray()
> > for cP in range(numPts.GetValue(0)): ptsIds.InsertNextValue(cP)
> > numCellFaces = vtk.vtkIdTypeArray()
> > numCellFaces.InsertNextValue(Poly.GetNumberOfPolys())
> > faces = vtk.vtkIdTypeArray()
> > for cF in range(numCellFaces.GetValue(0)):
> > numPtsInFace = vtk.vtkIdTypeArray()
> > numPtsInFace.InsertNextValue( Poly.GetCell(cF).GetNumberOfPoints())
> > faces.InsertNextValue(numPtsInFace)
> > for cPF in range(numPtsInFace.GetValue(0)):
> > faces.InsertNextValue(Poly.GetCell(cF).GetPointId(cPF))
> >
> > # Make the grid
> > UnstructPolyHed = vtk.vtkUnstructuredGrid()
> > UnstructPolyHed.SetPoints(Poly.GetPoints())
> >
> >
> UnstructPolyHed.InsertNextCell(vtk.VTK_POLYHEDRON,numPts,ptsIds,numCellFaces,faces)
> >
> >
> > But I always end with this error: InsertNextCell() takes exactly 2
> > arguments (5 given)
> >
> > The example used 5 inputs as follows
> > InsertNextCell(int type, vtkIdType npts, vtkIdType *ptIds, vtkIdType
> > nfaces, vtkIdType *faces)
> >
> >
> > What am I doing incorrectly?
> >
> > Thanks in advance.
> >
> > Cheers,
> > Gudni Karl
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL: <
> >
> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/c805ba42/attachment-0001.htm
> > >
> >
> > ------------------------------
> >
> > Message: 11
> > Date: Mon, 24 Jun 2013 09:25:01 -0400
> > From: Randy Heiland <heiland at indiana.edu>
> > Subject: [vtkusers] building vtk6, simple example
> > To: vtkusers at vtk.org
> > Message-ID: <86953D8F-E239-49CE-AEF8-044F0B7C5BAD at indiana.edu>
> > Content-Type: text/plain; charset=us-ascii
> >
> > Hello,
> >
> > Thought I'd take a stab at VTK6 and will ask the about the build process,
> > in general, as well as a specific link error, while I also dig a little
> > deeper. I did a simple cmake/build via:
> > cmake -DCMAKE_CXX_COMPILER:FILEPATH=/usr/bin/g++
> > -DCMAKE_C_COMPILER:FILEPATH=/usr/bin/gcc ../VTK6.0.0.rc3
> >
> > and make install. Then I downloaded the tarball from here:
> > http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/SimplePointsReader , did a
> > successful cmake on it, but then got:
> >
> > ~/dev/vtk6-play/SimplePointsReader/build$ make
> > Scanning dependencies of target SimplePointsReader
> > [100%] Building CXX object
> > CMakeFiles/SimplePointsReader.dir/SimplePointsReader.cxx.o
> > Linking CXX executable
> > SimplePointsReader.app/Contents/MacOS/SimplePointsReader
> > ld: library not found for -lvtkFiltersParallelFlowPaths
> > collect2: ld returned 1 exit status
> >
> > This seemed curious, since I hadn't turned on any parallel flags in the
> > VTK cmake. But sure enough, I saw that some parallel libs had been
> built,
> > e.g.:
> > ~/dev/vtk6-build$ ls /usr/local/lib/libvtk*Paral*.dylib
> > /usr/local/lib/libvtkFiltersParallel-6.0.1.dylib*
> > /usr/local/lib/libvtkFiltersParallel-6.0.dylib@
> > /usr/local/lib/libvtkFiltersParallelImaging-6.0.1.dylib*
> > /usr/local/lib/libvtkFiltersParallelImaging-6.0.dylib@
> > /usr/local/lib/libvtkIOParallel-6.0.1.dylib*
> > /usr/local/lib/libvtkIOParallel-6.0.dylib@
> > /usr/local/lib/libvtkParallelCore-6.0.1.dylib*
> > /usr/local/lib/libvtkParallelCore-6.0.dylib@
> >
> > Fwiw, I also have:
> > ~/dev/vtk6-build$ grep parallel CMakeCache.txt |grep bool
> > Module_vtkFiltersParallelFlowPaths:BOOL=OFF
> > Module_vtkFiltersParallelGeometry:BOOL=OFF
> > Module_vtkFiltersParallelMPI:BOOL=OFF
> > Module_vtkFiltersParallelStatistics:BOOL=OFF
> > Module_vtkIOMPIParallel:BOOL=OFF
> > Module_vtkIOParallelExodus:BOOL=OFF
> > Module_vtkIOParallelLSDyna:BOOL=OFF
> > Module_vtkIOParallelNetCDF:BOOL=OFF
> > Module_vtkInfovisParallel:BOOL=OFF
> > Module_vtkParallelMPI:BOOL=OFF
> > Module_vtkRenderingParallel:BOOL=OFF
> >
> > So, a couple questions - why are parallel libs being built and why does
> > this example seem to require them? Apologies if I missed info on the
> wiki,
> > etc.
> >
> > thanks, Randy
> >
> > ------------------------------
> >
> > Message: 12
> > Date: Mon, 24 Jun 2013 07:01:15 -0700 (PDT)
> > From: chasank <chasank at gmail.com>
> > Subject: [vtkusers] vtkborderwidget in vtk6.0rc3
> > To: vtkusers at vtk.org
> > Message-ID: <1372082475230-5721550.post at n5.nabble.com>
> > Content-Type: text/plain; charset=us-ascii
> >
> > Hi,
> >
> > Although vtk5.10.1 has vtkBorderWidget class, vtk6.0rc3 has not
> > vtkBorderWidget class. Also, this class is not marked as deprecated in
> > deprecated list (http://www.vtk.org/doc/nightly/html/deprecated.html). I
> > wonder whether vtk6.0 stable version will have this class. If not, which
> > class will be used instead of vtkBorderWidget in vtk6.0 stable version.
> >
> >
> >
> > --
> > View this message in context:
> >
> http://vtk.1045678.n5.nabble.com/vtkborderwidget-in-vtk6-0rc3-tp5721550.html
> > Sent from the VTK - Users mailing list archive at Nabble.com.
> >
> >
> > ------------------------------
> >
> > Message: 13
> > Date: Mon, 24 Jun 2013 10:04:14 -0400
> > From: Cory Quammen <cquammen at cs.unc.edu>
> > Subject: Re: [vtkusers] Plane polydata intersection
> > To: Laurent Chauvin <lchauvin at bwh.harvard.edu>
> > Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> > Message-ID:
> > <CANmPiKAiLM3NwHvKY4aUejELTQ=+ihOifUJ-xZYkKo7EAWR=
> > qA at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > On Sun, Jun 23, 2013 at 12:41 PM, Laurent Chauvin
> > <lchauvin at bwh.harvard.edu> wrote:
> > > Hi Cory,
> > >
> > > Thank you very much for your reply.
> > > However, I'm not sure to understand what you mean.
> > > Should I create a new polydata with all points at the same z
> coordinates
> > ?
> >
> > Laurent,
> >
> > You don't need to create a new polydata. Instead, you can add a new
> > vtkDataArray (likely a vtkFloatArray or vtkDataArray in this case) to
> > the point data of whatever polydata you already have by using
> > vtkPolyData::GetPointData()->AddArray(...).
> >
> > For axis-aligned planes, this new array could simply contain the x, y,
> > or z coordinate of each of the points in your vtkPolyData. If you want
> > an intersection of your poly data with a plane spanning x and y, you
> > would add a point data array storing all the z values. You can then
> > use the vtkContourFilter to get the polydata consisting of line
> > segments that represents the intersection of your polydata with the
> > plane at a given z value by specifying that z value as the isolevel
> > for the contour filter. You have to make sure you tell the
> > vtkContourFilter to use your new coordinate array.
> >
> > For an quick example of this concept, I've attached a simple ParaView
> > statefile showing how you can do this for a cylinder polydata. In this
> > example, I've specified my plane as spanning the x and y coordinates
> > with z value 0.2. In ParaView, I've used the Calculator to compute the
> > array consisting of the z coordinates of each point in the cylinder.
> > Forgive me if you don't have ParaView installed, we use it all the
> > time when prototyping visualizations.
> >
> > > Does this work with some oblique planes ( not parallel to x,y, or z
> axis
> > ) ?
> >
> > For the general case of an arbitrary plane, you would want to compute
> > the distance from each point your desired plan instead of creating a
> > new array containing the x, y, or z coordinates of each point. Then
> > you would set the vtkContourFilter isolevel to 0. The point plane
> > calculation is pretty simple:
> > http://mathworld.wolfram.com/Point-PlaneDistance.html
> >
> > Does that make sense?
> >
> > > Thank you.
> > > -Laurent
> > >
> > >
> > > On Sun, Jun 23, 2013 at 12:31 PM, Cory Quammen <cquammen at cs.unc.edu>
> > wrote:
> > >>
> > >> Laurent,
> > >>
> > >> For this special case of computing the intersection between a polydata
> > >> and a plane, you can use a little trick. First, you can compute a new
> > >> point data set for your polydata with,say, the z coordinates of each
> > >> point in the polydata. Then, to get the intersection with an xy plane,
> > >> you then use the vtkContourFilter operating on this coordinate point
> > >> data and specify the z value that corresponds to your plane. The
> > >> result should be equivalent to the intersection of the polydata with
> > >> that plane.
> > >>
> > >> It should be relatively fast to compute the contour, so you can
> > >> probably do this interactively.
> > >>
> > >> Hope that helps,
> > >> Cory
> > >>
> > >> On Sat, Jun 22, 2013 at 2:46 PM, Laurent Chauvin
> > >> <lchauvin at bwh.harvard.edu> wrote:
> > >> > Hello,
> > >> >
> > >> > I'm working on Slicer, and I was trying to find a nice way to
> display
> > >> > intersection between polydata and a plane.
> > >> > I read we could use a vtkCutter, but the thing is, I would like to
> do
> > >> > this
> > >> > interactively. I want to be able to move the plane, and update the
> > >> > intersection while moving the plane.
> > >> > I'm not sure using vtkCutter for this purpose would work. I think
> > >> > vtkCutter
> > >> > will take some times to execute, then moving the plane will be slow.
> > >> >
> > >> > I know this question has been asked before, but I would like if
> there
> > >> > were
> > >> > some update since then. New widgets or object that I could use for
> > that
> > >> > ?
> > >> >
> > >> > I was thinking using vtkImageReslice, get polydata of the plane and
> > >> > compute
> > >> > the intersection between the 2 polydata, but I think it would also
> be
> > to
> > >> > computing intensive to be able to do it smoothly with an interactive
> > >> > plane.
> > >> >
> > >> > Thank you.
> > >> > -Laurent
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > _______________________________________________
> > >> > Powered by www.kitware.com
> > >> >
> > >> > Visit other Kitware open-source projects at
> > >> > http://www.kitware.com/opensource/opensource.html
> > >> >
> > >> > Please keep messages on-topic and check the VTK FAQ at:
> > >> > http://www.vtk.org/Wiki/VTK_FAQ
> > >> >
> > >> > Follow this link to subscribe/unsubscribe:
> > >> > http://www.vtk.org/mailman/listinfo/vtkusers
> > >> >
> > >>
> > >>
> > >>
> > >> --
> > >> Cory Quammen
> > >> Research Associate
> > >> Department of Computer Science
> > >> The University of North Carolina at Chapel Hill
> > >
> > >
> > >
> > >
> > > --
> > > Laurent Chauvin, MS
> > > Surgical Navigation and Robotics Laboratory, Radiology
> > > Brigham And Women's Hospital, Harvard Medical School
> > > http://wiki.ncigt.org/index.php/User:Lchauvin
> >
> >
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
> > -------------- next part --------------
> > A non-text attachment was scrubbed...
> > Name: PlaneIntersectionExample.pvsm
> > Type: application/octet-stream
> > Size: 119252 bytes
> > Desc: not available
> > URL: <
> >
> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/a4f8c898/attachment.obj
> > >
> >
> > ------------------------------
> >
> > _______________________________________________
> > vtkusers mailing list
> > vtkusers at vtk.org
> > http://www.vtk.org/mailman/listinfo/vtkusers
> >
> >
> > End of vtkusers Digest, Vol 110, Issue 31
> > *****************************************
> >
>
>
>
> --
> *Best Regards
> Rahul Indoria
> Mobile No: +49-157-35652212*
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/9490191a/attachment-0001.htm
> >
>
> ------------------------------
>
> Message: 2
> Date: Mon, 24 Jun 2013 10:20:15 -0400
> From: Laurent Chauvin <lchauvin at bwh.harvard.edu>
> Subject: Re: [vtkusers] Plane polydata intersection
> To: Cory Quammen <cquammen at cs.unc.edu>
> Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> Message-ID: <74BDA439-1EE1-430A-B61E-A0CCD569634B at bwh.harvard.edu>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Cory,
>
> Thank you for your reply.
>
> However, you said I have to compute distance from each point to my plane,
> then use vtkContourFilter.
> But I think it would be really heavy computation to compute distance from
> each point to the plane every time I move the plane, isn't it ?
>
> I would like to be able to display the intersection while the plane is
> moving. If I have a polydata like a bone or a skull or something like that,
> it would be really long to compute this distance, isn't it ?
>
> Thank you.
> -Laurent
>
>
>
> On Jun 24, 2013, at 10:04 AM, Cory Quammen <cquammen at cs.unc.edu> wrote:
>
> > On Sun, Jun 23, 2013 at 12:41 PM, Laurent Chauvin
> > <lchauvin at bwh.harvard.edu> wrote:
> >> Hi Cory,
> >>
> >> Thank you very much for your reply.
> >> However, I'm not sure to understand what you mean.
> >> Should I create a new polydata with all points at the same z
> coordinates ?
> >
> > Laurent,
> >
> > You don't need to create a new polydata. Instead, you can add a new
> > vtkDataArray (likely a vtkFloatArray or vtkDataArray in this case) to
> > the point data of whatever polydata you already have by using
> > vtkPolyData::GetPointData()->AddArray(...).
> >
> > For axis-aligned planes, this new array could simply contain the x, y,
> > or z coordinate of each of the points in your vtkPolyData. If you want
> > an intersection of your poly data with a plane spanning x and y, you
> > would add a point data array storing all the z values. You can then
> > use the vtkContourFilter to get the polydata consisting of line
> > segments that represents the intersection of your polydata with the
> > plane at a given z value by specifying that z value as the isolevel
> > for the contour filter. You have to make sure you tell the
> > vtkContourFilter to use your new coordinate array.
> >
> > For an quick example of this concept, I've attached a simple ParaView
> > statefile showing how you can do this for a cylinder polydata. In this
> > example, I've specified my plane as spanning the x and y coordinates
> > with z value 0.2. In ParaView, I've used the Calculator to compute the
> > array consisting of the z coordinates of each point in the cylinder.
> > Forgive me if you don't have ParaView installed, we use it all the
> > time when prototyping visualizations.
> >
> >> Does this work with some oblique planes ( not parallel to x,y, or z
> axis ) ?
> >
> > For the general case of an arbitrary plane, you would want to compute
> > the distance from each point your desired plan instead of creating a
> > new array containing the x, y, or z coordinates of each point. Then
> > you would set the vtkContourFilter isolevel to 0. The point plane
> > calculation is pretty simple:
> > http://mathworld.wolfram.com/Point-PlaneDistance.html
> >
> > Does that make sense?
> >
> >> Thank you.
> >> -Laurent
> >>
> >>
> >> On Sun, Jun 23, 2013 at 12:31 PM, Cory Quammen <cquammen at cs.unc.edu>
> wrote:
> >>>
> >>> Laurent,
> >>>
> >>> For this special case of computing the intersection between a polydata
> >>> and a plane, you can use a little trick. First, you can compute a new
> >>> point data set for your polydata with,say, the z coordinates of each
> >>> point in the polydata. Then, to get the intersection with an xy plane,
> >>> you then use the vtkContourFilter operating on this coordinate point
> >>> data and specify the z value that corresponds to your plane. The
> >>> result should be equivalent to the intersection of the polydata with
> >>> that plane.
> >>>
> >>> It should be relatively fast to compute the contour, so you can
> >>> probably do this interactively.
> >>>
> >>> Hope that helps,
> >>> Cory
> >>>
> >>> On Sat, Jun 22, 2013 at 2:46 PM, Laurent Chauvin
> >>> <lchauvin at bwh.harvard.edu> wrote:
> >>>> Hello,
> >>>>
> >>>> I'm working on Slicer, and I was trying to find a nice way to display
> >>>> intersection between polydata and a plane.
> >>>> I read we could use a vtkCutter, but the thing is, I would like to do
> >>>> this
> >>>> interactively. I want to be able to move the plane, and update the
> >>>> intersection while moving the plane.
> >>>> I'm not sure using vtkCutter for this purpose would work. I think
> >>>> vtkCutter
> >>>> will take some times to execute, then moving the plane will be slow.
> >>>>
> >>>> I know this question has been asked before, but I would like if there
> >>>> were
> >>>> some update since then. New widgets or object that I could use for
> that
> >>>> ?
> >>>>
> >>>> I was thinking using vtkImageReslice, get polydata of the plane and
> >>>> compute
> >>>> the intersection between the 2 polydata, but I think it would also be
> to
> >>>> computing intensive to be able to do it smoothly with an interactive
> >>>> plane.
> >>>>
> >>>> Thank you.
> >>>> -Laurent
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> Powered by www.kitware.com
> >>>>
> >>>> Visit other Kitware open-source projects at
> >>>> http://www.kitware.com/opensource/opensource.html
> >>>>
> >>>> Please keep messages on-topic and check the VTK FAQ at:
> >>>> http://www.vtk.org/Wiki/VTK_FAQ
> >>>>
> >>>> Follow this link to subscribe/unsubscribe:
> >>>> http://www.vtk.org/mailman/listinfo/vtkusers
> >>>>
> >>>
> >>>
> >>>
> >>> --
> >>> Cory Quammen
> >>> Research Associate
> >>> Department of Computer Science
> >>> The University of North Carolina at Chapel Hill
> >>
> >>
> >>
> >>
> >> --
> >> Laurent Chauvin, MS
> >> Surgical Navigation and Robotics Laboratory, Radiology
> >> Brigham And Women's Hospital, Harvard Medical School
> >> http://wiki.ncigt.org/index.php/User:Lchauvin
> >
> >
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
> > <PlaneIntersectionExample.pvsm>
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
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> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/84634e38/attachment-0001.htm
> >
>
> ------------------------------
>
> Message: 3
> Date: Mon, 24 Jun 2013 10:44:29 -0400
> From: Dean Inglis <inglis.dl at gmail.com>
> Subject: Re: [vtkusers] synchronous update between vtkImagePlaneWidget
> and vtkResliceCursorWidget
> To: ljp19890525 <ljp19890525 at 163.com>
> Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> Message-ID:
> <CABX+von=ToFhe54mk_p=JczfgXE66aOcjYnf+DN1M_hz5O=
> 1qg at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
> try the following code snippet. Basically, create a callback class wherein
> you decide how to update the reslice cursor widget from the image plane
> widget.
> Add the callback to listen for the image plane widget's InteractionEvent.
>
> regards,
> Dean
>
>
> class myCallback : public vtkCommand
> {
> public:
> static myCallback *New() {
> return new myCallback; }
>
> void Execute( vtkObject* vtkNotUsed(caller), unsigned long
> vtkNotUsed(event),
> void * vtkNotUsed(callData) )
> {
> /** do something with ipwidget and rcwidget when the ipwidget fires a
> an interaction event signal */
> }
>
> myCallback():ipwidget( 0 ), rcwidget( 0 ){}
> ~myCallback(){ this->ipwidget= 0; this->rcwidget = 0; }
> vtkImagePlaneWidget* ipwidget;
> vtkResliceCursorWidget* rcwidget;
> };
>
>
> void myclass::some_setup_method()
> {
> vtkSmartPointer<myCallback> cbk = vtkSmartPointer<myCallback>::New();
> cbk->ipwidget = this->ipwidget;
> cbk->rcwidget = this->rcwidget;
> this->ipwidget->AddObserver( vtkCommand::InteractionEvent, cbk );
> }
>
>
>
> On Thu, Jun 20, 2013 at 10:15 PM, nil_debug <ljp19890525 at 163.com> wrote:
>
> > **
> > Hello,
> > Is anyone can help me? Now I have defined a vtkImagePlaneWidget and a
> > vtkResliceCursorWidget, I would like to when dragging the
> > vtkImagePlaneWidget the vtkResliceCursorWidget can move.In a word I
> > don't know how to a "AddObserver" for the vtkImagePlaneWidget from
> > the vtkResliceCursorWidget! I do know I should define a "myCallBack",but
> > How?
> > Will be deeply grateful !
> >
> > ------------------------------
> > nil_debug
> >
> > _______________________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Please keep messages on-topic and check the VTK FAQ at:
> > http://www.vtk.org/Wiki/VTK_FAQ
> >
> > Follow this link to subscribe/unsubscribe:
> > http://www.vtk.org/mailman/listinfo/vtkusers
> >
> >
> -------------- next part --------------
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> http://www.vtk.org/pipermail/vtkusers/attachments/20130624/2a076878/attachment-0001.htm
> >
>
> ------------------------------
>
> Message: 4
> Date: Mon, 24 Jun 2013 10:46:10 -0400
> From: Cory Quammen <cquammen at cs.unc.edu>
> Subject: Re: [vtkusers] Plane polydata intersection
> To: Laurent Chauvin <lchauvin at bwh.harvard.edu>
> Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> Message-ID:
> <CANmPiKDicXmSpCLMJyZM5Q7-VA=
> 0JuAPQn6Ke7X2bZZvDKf3kQ at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Laurent,
>
> If your plane doesn't change orientation, then you should be able to
> change your isolevel value as you move the plane along its normal,
> thereby avoiding the distance computation, e.g., compute the distance
> one time relative to the current plane, then add 5 to the isolevel if
> your plane moves 5 units along the plane normal, etc.
>
> For a non-geometry based approach, you might use custom shaders to
> compute the distance of each vertex to your plane and discard
> fragments that aren't within some distance to the plane. This would be
> fast but may suffer from giving you a more-than-one-pixel-thick
> representation of the intersection in parts of the scene closest to
> the camera and perhaps missing some pixels in parts of the scene
> furthest from the camera.
>
> Hope that helps,
> Cory
>
>
>
> On Mon, Jun 24, 2013 at 10:20 AM, Laurent Chauvin
> <lchauvin at bwh.harvard.edu> wrote:
> > Hi Cory,
> >
> > Thank you for your reply.
> >
> > However, you said I have to compute distance from each point to my plane,
> > then use vtkContourFilter.
> > But I think it would be really heavy computation to compute distance from
> > each point to the plane every time I move the plane, isn't it ?
> >
> > I would like to be able to display the intersection while the plane is
> > moving. If I have a polydata like a bone or a skull or something like
> that,
> > it would be really long to compute this distance, isn't it ?
> >
> > Thank you.
> > -Laurent
> >
> >
> >
> > On Jun 24, 2013, at 10:04 AM, Cory Quammen <cquammen at cs.unc.edu> wrote:
> >
> > On Sun, Jun 23, 2013 at 12:41 PM, Laurent Chauvin
> > <lchauvin at bwh.harvard.edu> wrote:
> >
> > Hi Cory,
> >
> > Thank you very much for your reply.
> > However, I'm not sure to understand what you mean.
> > Should I create a new polydata with all points at the same z coordinates
> ?
> >
> >
> > Laurent,
> >
> > You don't need to create a new polydata. Instead, you can add a new
> > vtkDataArray (likely a vtkFloatArray or vtkDataArray in this case) to
> > the point data of whatever polydata you already have by using
> > vtkPolyData::GetPointData()->AddArray(...).
> >
> > For axis-aligned planes, this new array could simply contain the x, y,
> > or z coordinate of each of the points in your vtkPolyData. If you want
> > an intersection of your poly data with a plane spanning x and y, you
> > would add a point data array storing all the z values. You can then
> > use the vtkContourFilter to get the polydata consisting of line
> > segments that represents the intersection of your polydata with the
> > plane at a given z value by specifying that z value as the isolevel
> > for the contour filter. You have to make sure you tell the
> > vtkContourFilter to use your new coordinate array.
> >
> > For an quick example of this concept, I've attached a simple ParaView
> > statefile showing how you can do this for a cylinder polydata. In this
> > example, I've specified my plane as spanning the x and y coordinates
> > with z value 0.2. In ParaView, I've used the Calculator to compute the
> > array consisting of the z coordinates of each point in the cylinder.
> > Forgive me if you don't have ParaView installed, we use it all the
> > time when prototyping visualizations.
> >
> > Does this work with some oblique planes ( not parallel to x,y, or z axis
> ) ?
> >
> >
> > For the general case of an arbitrary plane, you would want to compute
> > the distance from each point your desired plan instead of creating a
> > new array containing the x, y, or z coordinates of each point. Then
> > you would set the vtkContourFilter isolevel to 0. The point plane
> > calculation is pretty simple:
> > http://mathworld.wolfram.com/Point-PlaneDistance.html
> >
> > Does that make sense?
> >
> > Thank you.
> > -Laurent
> >
> >
> > On Sun, Jun 23, 2013 at 12:31 PM, Cory Quammen <cquammen at cs.unc.edu>
> wrote:
> >
> >
> > Laurent,
> >
> > For this special case of computing the intersection between a polydata
> > and a plane, you can use a little trick. First, you can compute a new
> > point data set for your polydata with,say, the z coordinates of each
> > point in the polydata. Then, to get the intersection with an xy plane,
> > you then use the vtkContourFilter operating on this coordinate point
> > data and specify the z value that corresponds to your plane. The
> > result should be equivalent to the intersection of the polydata with
> > that plane.
> >
> > It should be relatively fast to compute the contour, so you can
> > probably do this interactively.
> >
> > Hope that helps,
> > Cory
> >
> > On Sat, Jun 22, 2013 at 2:46 PM, Laurent Chauvin
> > <lchauvin at bwh.harvard.edu> wrote:
> >
> > Hello,
> >
> > I'm working on Slicer, and I was trying to find a nice way to display
> > intersection between polydata and a plane.
> > I read we could use a vtkCutter, but the thing is, I would like to do
> > this
> > interactively. I want to be able to move the plane, and update the
> > intersection while moving the plane.
> > I'm not sure using vtkCutter for this purpose would work. I think
> > vtkCutter
> > will take some times to execute, then moving the plane will be slow.
> >
> > I know this question has been asked before, but I would like if there
> > were
> > some update since then. New widgets or object that I could use for that
> > ?
> >
> > I was thinking using vtkImageReslice, get polydata of the plane and
> > compute
> > the intersection between the 2 polydata, but I think it would also be to
> > computing intensive to be able to do it smoothly with an interactive
> > plane.
> >
> > Thank you.
> > -Laurent
> >
> >
> >
> >
> > _______________________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Please keep messages on-topic and check the VTK FAQ at:
> > http://www.vtk.org/Wiki/VTK_FAQ
> >
> > Follow this link to subscribe/unsubscribe:
> > http://www.vtk.org/mailman/listinfo/vtkusers
> >
> >
> >
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
> >
> >
> >
> >
> >
> > --
> > Laurent Chauvin, MS
> > Surgical Navigation and Robotics Laboratory, Radiology
> > Brigham And Women's Hospital, Harvard Medical School
> > http://wiki.ncigt.org/index.php/User:Lchauvin
> >
> >
> >
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
> > <PlaneIntersectionExample.pvsm>
> >
> >
>
>
>
> --
> Cory Quammen
> Research Associate
> Department of Computer Science
> The University of North Carolina at Chapel Hill
>
>
> ------------------------------
>
> Message: 5
> Date: Mon, 24 Jun 2013 11:05:39 -0400
> From: Laurent Chauvin <lchauvin at bwh.harvard.edu>
> Subject: Re: [vtkusers] Plane polydata intersection
> To: Cory Quammen <cquammen at cs.unc.edu>
> Cc: "vtkusers at vtk.org" <vtkusers at vtk.org>
> Message-ID: <339D1015-DE2E-4A6E-9E74-F78C876AE7DF at bwh.harvard.edu>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Cory.
>
> Indeed the plane I will use can change position and direction.
>
> Please, could you explain what is custom shaders and how to use them to
> compute distance ?
>
> Thank you.
> -Laurent
>
>
>
> On Jun 24, 2013, at 10:46 AM, Cory Quammen <cquammen at cs.unc.edu> wrote:
>
> > Laurent,
> >
> > If your plane doesn't change orientation, then you should be able to
> > change your isolevel value as you move the plane along its normal,
> > thereby avoiding the distance computation, e.g., compute the distance
> > one time relative to the current plane, then add 5 to the isolevel if
> > your plane moves 5 units along the plane normal, etc.
> >
> > For a non-geometry based approach, you might use custom shaders to
> > compute the distance of each vertex to your plane and discard
> > fragments that aren't within some distance to the plane. This would be
> > fast but may suffer from giving you a more-than-one-pixel-thick
> > representation of the intersection in parts of the scene closest to
> > the camera and perhaps missing some pixels in parts of the scene
> > furthest from the camera.
> >
> > Hope that helps,
> > Cory
> >
> >
> >
> > On Mon, Jun 24, 2013 at 10:20 AM, Laurent Chauvin
> > <lchauvin at bwh.harvard.edu> wrote:
> >> Hi Cory,
> >>
> >> Thank you for your reply.
> >>
> >> However, you said I have to compute distance from each point to my
> plane,
> >> then use vtkContourFilter.
> >> But I think it would be really heavy computation to compute distance
> from
> >> each point to the plane every time I move the plane, isn't it ?
> >>
> >> I would like to be able to display the intersection while the plane is
> >> moving. If I have a polydata like a bone or a skull or something like
> that,
> >> it would be really long to compute this distance, isn't it ?
> >>
> >> Thank you.
> >> -Laurent
> >>
> >>
> >>
> >> On Jun 24, 2013, at 10:04 AM, Cory Quammen <cquammen at cs.unc.edu> wrote:
> >>
> >> On Sun, Jun 23, 2013 at 12:41 PM, Laurent Chauvin
> >> <lchauvin at bwh.harvard.edu> wrote:
> >>
> >> Hi Cory,
> >>
> >> Thank you very much for your reply.
> >> However, I'm not sure to understand what you mean.
> >> Should I create a new polydata with all points at the same z
> coordinates ?
> >>
> >>
> >> Laurent,
> >>
> >> You don't need to create a new polydata. Instead, you can add a new
> >> vtkDataArray (likely a vtkFloatArray or vtkDataArray in this case) to
> >> the point data of whatever polydata you already have by using
> >> vtkPolyData::GetPointData()->AddArray(...).
> >>
> >> For axis-aligned planes, this new array could simply contain the x, y,
> >> or z coordinate of each of the points in your vtkPolyData. If you want
> >> an intersection of your poly data with a plane spanning x and y, you
> >> would add a point data array storing all the z values. You can then
> >> use the vtkContourFilter to get the polydata consisting of line
> >> segments that represents the intersection of your polydata with the
> >> plane at a given z value by specifying that z value as the isolevel
> >> for the contour filter. You have to make sure you tell the
> >> vtkContourFilter to use your new coordinate array.
> >>
> >> For an quick example of this concept, I've attached a simple ParaView
> >> statefile showing how you can do this for a cylinder polydata. In this
> >> example, I've specified my plane as spanning the x and y coordinates
> >> with z value 0.2. In ParaView, I've used the Calculator to compute the
> >> array consisting of the z coordinates of each point in the cylinder.
> >> Forgive me if you don't have ParaView installed, we use it all the
> >> time when prototyping visualizations.
> >>
> >> Does this work with some oblique planes ( not parallel to x,y, or z
> axis ) ?
> >>
> >>
> >> For the general case of an arbitrary plane, you would want to compute
> >> the distance from each point your desired plan instead of creating a
> >> new array containing the x, y, or z coordinates of each point. Then
> >> you would set the vtkContourFilter isolevel to 0. The point plane
> >> calculation is pretty simple:
> >> http://mathworld.wolfram.com/Point-PlaneDistance.html
> >>
> >> Does that make sense?
> >>
> >> Thank you.
> >> -Laurent
> >>
> >>
> >> On Sun, Jun 23, 2013 at 12:31 PM, Cory Quammen <cquammen at cs.unc.edu>
> wrote:
> >>
> >>
> >> Laurent,
> >>
> >> For this special case of computing the intersection between a polydata
> >> and a plane, you can use a little trick. First, you can compute a new
> >> point data set for your polydata with,say, the z coordinates of each
> >> point in the polydata. Then, to get the intersection with an xy plane,
> >> you then use the vtkContourFilter operating on this coordinate point
> >> data and specify the z value that corresponds to your plane. The
> >> result should be equivalent to the intersection of the polydata with
> >> that plane.
> >>
> >> It should be relatively fast to compute the contour, so you can
> >> probably do this interactively.
> >>
> >> Hope that helps,
> >> Cory
> >>
> >> On Sat, Jun 22, 2013 at 2:46 PM, Laurent Chauvin
> >> <lchauvin at bwh.harvard.edu> wrote:
> >>
> >> Hello,
> >>
> >> I'm working on Slicer, and I was trying to find a nice way to display
> >> intersection between polydata and a plane.
> >> I read we could use a vtkCutter, but the thing is, I would like to do
> >> this
> >> interactively. I want to be able to move the plane, and update the
> >> intersection while moving the plane.
> >> I'm not sure using vtkCutter for this purpose would work. I think
> >> vtkCutter
> >> will take some times to execute, then moving the plane will be slow.
> >>
> >> I know this question has been asked before, but I would like if there
> >> were
> >> some update since then. New widgets or object that I could use for that
> >> ?
> >>
> >> I was thinking using vtkImageReslice, get polydata of the plane and
> >> compute
> >> the intersection between the 2 polydata, but I think it would also be to
> >> computing intensive to be able to do it smoothly with an interactive
> >> plane.
> >>
> >> Thank you.
> >> -Laurent
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Powered by www.kitware.com
> >>
> >> Visit other Kitware open-source projects at
> >> http://www.kitware.com/opensource/opensource.html
> >>
> >> Please keep messages on-topic and check the VTK FAQ at:
> >> http://www.vtk.org/Wiki/VTK_FAQ
> >>
> >> Follow this link to subscribe/unsubscribe:
> >> http://www.vtk.org/mailman/listinfo/vtkusers
> >>
> >>
> >>
> >>
> >> --
> >> Cory Quammen
> >> Research Associate
> >> Department of Computer Science
> >> The University of North Carolina at Chapel Hill
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Laurent Chauvin, MS
> >> Surgical Navigation and Robotics Laboratory, Radiology
> >> Brigham And Women's Hospital, Harvard Medical School
> >> http://wiki.ncigt.org/index.php/User:Lchauvin
> >>
> >>
> >>
> >>
> >> --
> >> Cory Quammen
> >> Research Associate
> >> Department of Computer Science
> >> The University of North Carolina at Chapel Hill
> >> <PlaneIntersectionExample.pvsm>
> >>
> >>
> >
> >
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
>
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> ------------------------------
>
> Message: 6
> Date: Mon, 24 Jun 2013 15:32:32 +0000
> From: David Cole <dlrdave at aol.com>
> Subject: Re: [vtkusers] vtkborderwidget in vtk6.0rc3
> To: " vtkusers at vtk.org " <vtkusers at vtk.org>, chasank
> <chasank at gmail.com>
> Message-ID: <20130624153446.3248465791 at public.kitware.com>
> Content-Type: text/plain; charset="utf-8"
>
> > Although vtk5.10.1 has vtkBorderWidget class, vtk6.0rc3 has not
> > vtkBorderWidget class. Also, this class is not marked as deprecated in
> > deprecated list (http://www.vtk.org/doc/nightly/html/deprecated.html). I
> > wonder whether vtk6.0 stable version will have this class. If not, which
> > class will be used instead of vtkBorderWidget in vtk6.0 stable version.
>
>
>
> If I do a checkout of VTK 6.0.0.rc3:
>
> $ git checkout v6.0.0.rc3
>
>
> And then look for files with ?border? in the name:
>
> $ find . | grep -i border
> ./Interaction/Widgets/Testing/Cxx/TestBorderWidget.cxx
> ./Interaction/Widgets/Testing/Cxx/vtkBorderWidgetTest1.cxx
> ./Interaction/Widgets/vtkBorderRepresentation.cxx
> ./Interaction/Widgets/vtkBorderRepresentation.h
> ./Interaction/Widgets/vtkBorderWidget.cxx
> ./Interaction/Widgets/vtkBorderWidget.h
> ./Rendering/OpenGL/Testing/Cxx/TestImageResliceMapperBorder.cxx
> ./Rendering/OpenGL/Testing/Cxx/TestImageSliceMapperBorder.cxx
>
>
> They do indeed appear to be in VTK 6.0.0 rc3. I wonder why you don?t think
> they?re there...?
>
>
>
> HTH,
>
> David C.
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>
> ------------------------------
>
> Message: 7
> Date: Mon, 24 Jun 2013 11:39:19 -0400
> From: "Marcus D. Hanwell" <marcus.hanwell at kitware.com>
> Subject: Re: [vtkusers] building vtk6, simple example
> To: Randy Heiland <heiland at indiana.edu>
> Cc: vtkusers at vtk.org
> Message-ID:
> <CAMkPkZVtAAPd7UqEpS1_JvncYmbaRb0qJ4=
> E1RbwMQwcEvMSwA at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> On Mon, Jun 24, 2013 at 9:25 AM, Randy Heiland <heiland at indiana.edu>
> wrote:
>
> > Hello,
> >
> > Thought I'd take a stab at VTK6 and will ask the about the build process,
> > in general, as well as a specific link error, while I also dig a little
> > deeper. I did a simple cmake/build via:
> > cmake -DCMAKE_CXX_COMPILER:FILEPATH=/usr/bin/g++
> > -DCMAKE_C_COMPILER:FILEPATH=/usr/bin/gcc ../VTK6.0.0.rc3
> >
> > and make install. Then I downloaded the tarball from here:
> > http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/SimplePointsReader , did a
> > successful cmake on it, but then got:
> >
> > ~/dev/vtk6-play/SimplePointsReader/build$ make
> > Scanning dependencies of target SimplePointsReader
> > [100%] Building CXX object
> > CMakeFiles/SimplePointsReader.dir/SimplePointsReader.cxx.o
> > Linking CXX executable
> > SimplePointsReader.app/Contents/MacOS/SimplePointsReader
> > ld: library not found for -lvtkFiltersParallelFlowPaths
> > collect2: ld returned 1 exit status
> >
> > This seemed curious, since I hadn't turned on any parallel flags in the
> > VTK cmake. But sure enough, I saw that some parallel libs had been
> built,
> > e.g.:
> > ~/dev/vtk6-build$ ls /usr/local/lib/libvtk*Paral*.dylib
> > /usr/local/lib/libvtkFiltersParallel-6.0.1.dylib*
> > /usr/local/lib/libvtkFiltersParallel-6.0.dylib@
> > /usr/local/lib/libvtkFiltersParallelImaging-6.0.1.dylib*
> > /usr/local/lib/libvtkFiltersParallelImaging-6.0.dylib@
> > /usr/local/lib/libvtkIOParallel-6.0.1.dylib*
> > /usr/local/lib/libvtkIOParallel-6.0.dylib@
> > /usr/local/lib/libvtkParallelCore-6.0.1.dylib*
> > /usr/local/lib/libvtkParallelCore-6.0.dylib@
> >
> > Fwiw, I also have:
> > ~/dev/vtk6-build$ grep parallel CMakeCache.txt |grep bool
> > Module_vtkFiltersParallelFlowPaths:BOOL=OFF
> > Module_vtkFiltersParallelGeometry:BOOL=OFF
> > Module_vtkFiltersParallelMPI:BOOL=OFF
> > Module_vtkFiltersParallelStatistics:BOOL=OFF
> > Module_vtkIOMPIParallel:BOOL=OFF
> > Module_vtkIOParallelExodus:BOOL=OFF
> > Module_vtkIOParallelLSDyna:BOOL=OFF
> > Module_vtkIOParallelNetCDF:BOOL=OFF
> > Module_vtkInfovisParallel:BOOL=OFF
> > Module_vtkParallelMPI:BOOL=OFF
> > Module_vtkRenderingParallel:BOOL=OFF
> >
> > So, a couple questions - why are parallel libs being built and why does
> > this example seem to require them? Apologies if I missed info on the
> wiki,
> > etc.
> >
>
> Part of this stems from the CMakeLists.txt in the example - if you use
> find_package(VTK) without specifying components then use ${VTK_LIBRARIES}
> you will basically link to everything VTK built. This is not normally what
> people want, and you can see the pre-6.0 version called out vtkHybrid. The
> wiki page below provides more background,
>
> http://www.vtk.org/Wiki/VTK/Build_System_Migration
>
> It leads to the question of why the VTK you built thinks
> vtkFiltersParallelFlowPaths was enabled when it was now. We will build some
> of the parallel modules that do not require MPI for example - they are
> probably in the StandAlone group, although it is possible they would be
> better in a parallel group of their own. The examples attempt to work with
> VTK 5 and 6, adding the components would make that harder to achieve which
> is why I think their CMake code is written the way it is.
>
> Hope that makes it clearer, thanks for bringing this up. I would like to
> get to the bottom of why VTK has incorrectly labelled a module as enabled
> that was not built.
>
> Marcus
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>
> ------------------------------
>
> Message: 8
> Date: Mon, 24 Jun 2013 15:34:54 +0000
> From: David Cole <dlrdave at aol.com>
> Subject: Re: [vtkusers] Render Control
> To: " vtkusers at vtk.org " <vtkusers at vtk.org>, Max
> <smapersmaper at gmail.com>
> Message-ID: <20130624154152.DF67C63DED at public.kitware.com>
> Content-Type: text/plain; charset="utf-8"
>
> > Hi David and thank you for the reply,
>
>
> sure, no problem.
>
>
>
> > so what is the way to add the render control to the winform in 64 bit?
> > Currently what I did:
>
> > ...
> > well, it works in runtime
>
>
> Good, it?s supposed to.
>
>
>
> > but it says it cannot find the kitware clr in
> > design time.
>
>
> It?s right, because Visual Studio is a 32-bit host, and it CANNOT LOAD
> 64-bit controls. It can only load ?Any CPU? controls that can be
> just-in-time compiled to a 32-bit architecture. The ActiViz dlls cannot be
> just-in-time compiled to any old architecture -- it has to match the
> underlying native dlls that get loaded.
>
>
> So, this is normal and expected behavior in the case of ActiViz. It?s
> strange when you first encounter it, because there aren?t many .NET
> controls that have this type of native code dependency. But it is the way
> it is, and Visual Studio itself will probably never be a 64-bit app.
>
>
>
> > Also i don't think that for it to work i need to install also 86 bit
> version
> > of activiz
>
>
> Yes, you do, if you want to add it the ?normal? way you add things at
> design time in Visual Studio. You have to add it as the 32-bit control,
> then switch your application?s target architecture and swap the references
> to the 64-bit versions... Then just ignore the Visual Studio design-time
> ?errors? that you get. If you can build and run it, then it?s all working
> as best it can.
>
>
>
> > i tried to add the control through kitware dll but it cannot find it...
> > Something is not right here i think...
> > Can you please tell me what i did wrong?
>
>
> I don?t think you?ve done anything wrong, because you say ?it works in
> runtime? -- if you had done something wrong, it wouldn?t.
>
>
>
> Cheers,
>
> David C.
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> _______________________________________________
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>
> End of vtkusers Digest, Vol 110, Issue 32
> *****************************************
>
--
*Best Regards
Rahul Indoria
Mobile No: +49-157-35652212*
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