From wei_yang520 at hotmail.com  Tue Jun  4 01:51:00 2019
From: wei_yang520 at hotmail.com (StephenWei)
Date: Mon, 3 Jun 2019 22:51:00 -0700 (MST)
Subject: [vtkusers] Copy/duplicate vtkActor
In-Reply-To: <CAMR8pHBVpBGi5eaEbBf8fY+euc8bMBpWY74aEe28tfhGUyE7ig@mail.gmail.com>
References: <CAMR8pHBVpBGi5eaEbBf8fY+euc8bMBpWY74aEe28tfhGUyE7ig@mail.gmail.com>
Message-ID: <1559627460764-0.post@n5.nabble.com>

It seems there is no DeepCopy interface in class vtkActor.
We can create our own DeepCopy refers to `void vtkActor::ShallowCopy(vtkProp
*prop)`:
Create independent mapper, Property, Texture and etc for the new vtkActor
object. And set origin, position, Orientation and UserTransform for it.



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From andrewkeeling at hotmail.com  Thu Jun  6 12:28:18 2019
From: andrewkeeling at hotmail.com (andyjk)
Date: Thu, 6 Jun 2019 09:28:18 -0700 (MST)
Subject: [vtkusers] Merge boundary edges filter/method?
Message-ID: <1559838498897-0.post@n5.nabble.com>

I am subdividing part of a mesh by extracting those cells, subdividing, then
using AppendPolyData filter to patch it back in exactly to the hole it left.
However, this leaves boundary edges as shown below in green (even after
CleanPolyData filter), where there is obviously a mismatch in triangulation.

Is there any filter that can merge edges which are on top of eachother (just
as cleanpolydata does for points) ?
<http://vtk.1045678.n5.nabble.com/file/t325404/boundaries.png> 






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From inglis.dl at gmail.com  Thu Jun  6 13:50:10 2019
From: inglis.dl at gmail.com (Dean Inglis)
Date: Thu, 6 Jun 2019 13:50:10 -0400
Subject: [vtkusers] Merge boundary edges filter/method?
In-Reply-To: <1559838498897-0.post@n5.nabble.com>
References: <1559838498897-0.post@n5.nabble.com>
Message-ID: <CABX+vo=5fW2Tj9MD4KAS29u7zOpebv5v0qv73njYLveJn+yrcw@mail.gmail.com>

Hi Andy,

it looks like the only way you could merge is to subdivide a larger
triangle in a "fan" so that its long adjacent edge is subdivided to match
the
smaller triangles.

- Dean


On Thu, Jun 6, 2019 at 12:28 PM andyjk <andrewkeeling at hotmail.com> wrote:

> I am subdividing part of a mesh by extracting those cells, subdividing,
> then
> using AppendPolyData filter to patch it back in exactly to the hole it
> left.
> However, this leaves boundary edges as shown below in green (even after
> CleanPolyData filter), where there is obviously a mismatch in
> triangulation.
>
> Is there any filter that can merge edges which are on top of eachother
> (just
> as cleanpolydata does for points) ?
> <http://vtk.1045678.n5.nabble.com/file/t325404/boundaries.png>
>
>
>
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> 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
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://vtk.org/mailman/listinfo/vtkusers
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From andrewkeeling at hotmail.com  Thu Jun  6 16:57:06 2019
From: andrewkeeling at hotmail.com (andyjk)
Date: Thu, 6 Jun 2019 13:57:06 -0700 (MST)
Subject: [vtkusers] Merge boundary edges filter/method?
In-Reply-To: <CABX+vo=5fW2Tj9MD4KAS29u7zOpebv5v0qv73njYLveJn+yrcw@mail.gmail.com>
References: <1559838498897-0.post@n5.nabble.com>
 <CABX+vo=5fW2Tj9MD4KAS29u7zOpebv5v0qv73njYLveJn+yrcw@mail.gmail.com>
Message-ID: <1559854626665-0.post@n5.nabble.com>

Thanks Dean
I feared as much. 

I may encounter an issue of creating some weird triangles when I have twpo
edges to merge (like one of the triangles in my picture). I could fan the
first edge out like you suggest, but then the second edge might end up with
some disproportionately small triangles. I was hoping for a magic vtk
solution! I tried filling holes but it doesn't consistently detect the
'holes' ( ie the overlaid edges).

I wondered if I could do something with ribbon filter or similar but cannot
seem to work it out. 



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From andrewkeeling at hotmail.com  Thu Jun 13 15:57:19 2019
From: andrewkeeling at hotmail.com (andyjk)
Date: Thu, 13 Jun 2019 12:57:19 -0700 (MST)
Subject: [vtkusers] Can we add a check to see if we have at least 2
 nodes when vtkContourWidget is in Manipulate state?
In-Reply-To: <CAKkFzuddnrikq0m_J9XnfEuPFCsWJa-FR6MK5v7nf9xrbV29bw@mail.gmail.com>
References: <CALmcJSDueKiSt3FNwDgCRkEYJQedoKNNhj_KBRGQxQYss1dxrw@mail.gmail.com>
 <CAKkFzufXnXDhvjCwJJW85Z8P55=v9fUJi_WCy1PEQJDb=7tewg@mail.gmail.com>
 <CALmcJSB+mj0+QHU1WMH2G35YNcq9NmdnNhOGY9B2qK5en4FQRg@mail.gmail.com>
 <CAKkFzuddnrikq0m_J9XnfEuPFCsWJa-FR6MK5v7nf9xrbV29bw@mail.gmail.com>
Message-ID: <1560455839694-0.post@n5.nabble.com>

I have the same problem. I can only add one point (the first) and even then,
the interactor crashes if I try to do more. Simple example below - basically
from
https://vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PolygonalSurfaceContourLineInterpolator
with a few lines added. Any reason why I cannot add nodes programatically ?
Thanks !

#include <vtkVersion.h>
#include "vtkSmartPointer.h"

#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkCellArray.h"
#include "vtkImageDataGeometryFilter.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkPolyDataCollection.h"
#include "vtkPolyDataMapper.h"
#include "vtkProperty.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSphereSource.h"
#include "vtkTriangleFilter.h"
#include "vtkXMLPolyDataReader.h"

#include "vtkContourWidget.h"
#include "vtkOrientedGlyphContourRepresentation.h"
#include "vtkPolygonalSurfacePointPlacer.h"
#include "vtkPolygonalSurfaceContourLineInterpolator.h"


int main(int argc, char *argv[])
{
  vtkSmartPointer<vtkPolyData> polyData;
  if (argc < 2)
    {
    vtkSmartPointer<vtkSphereSource> sphereSource = 
      vtkSmartPointer<vtkSphereSource>::New();
    sphereSource->SetThetaResolution(40);
    sphereSource->SetPhiResolution(20);
    sphereSource->Update();

    polyData = sphereSource->GetOutput();
    }
  else
    {
    vtkSmartPointer<vtkXMLPolyDataReader> reader = 
      vtkSmartPointer<vtkXMLPolyDataReader>::New();
    reader->SetFileName(argv[1]);
    reader->Update();
    polyData = reader->GetOutput();
    }
      
  // The Dijkistra interpolator will not accept cells that aren't triangles
  vtkSmartPointer<vtkTriangleFilter> triangleFilter = 
    vtkSmartPointer<vtkTriangleFilter>::New();
#if VTK_MAJOR_VERSION <= 5
  triangleFilter->SetInput( polyData );
#else
  triangleFilter->SetInputData( polyData );
#endif
  triangleFilter->Update();
  
  vtkSmartPointer<vtkPolyData> pd = triangleFilter->GetOutput();
  
  //Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(triangleFilter->GetOutputPort());
 
  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetInterpolationToFlat();
  
  // Create the render window, renderer and interactor.
 
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> interactor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor->SetRenderWindow(renderWindow);
  
  // Add the actors to the renderer, set the background and size
  
  renderer->AddActor(actor);
  renderer->SetBackground (.3, .4, .5);

  // Here comes the contour widget stuff...

  vtkSmartPointer<vtkContourWidget> contourWidget = 
    vtkSmartPointer<vtkContourWidget>::New();
  contourWidget->SetInteractor(interactor);
  vtkSmartPointer<vtkOrientedGlyphContourRepresentation> rep = 
    vtkOrientedGlyphContourRepresentation::SafeDownCast(
      contourWidget->GetRepresentation());
  rep->GetLinesProperty()->SetColor(1, 0.2, 0);
  rep->GetLinesProperty()->SetLineWidth(3.0);

  vtkSmartPointer<vtkPolygonalSurfacePointPlacer> pointPlacer =
    vtkSmartPointer<vtkPolygonalSurfacePointPlacer>::New();
  pointPlacer->AddProp(actor);
  pointPlacer->GetPolys()->AddItem( pd );
  rep->SetPointPlacer(pointPlacer);

  vtkSmartPointer<vtkPolygonalSurfaceContourLineInterpolator> interpolator =
    vtkSmartPointer<vtkPolygonalSurfaceContourLineInterpolator>::New();
  interpolator->GetPolys()->AddItem( pd );
  rep->SetLineInterpolator(interpolator);
  
  renderWindow->Render();
  interactor->Initialize();

  contourWidget->EnabledOn();
  contourWidget->Initialize();
  contourWidget->EnabledOff();

  double pt1[3]; pt1[0] = -0.107433; pt1[1] = 0.112549; pt1[2] = 0.474558;
  contourWidget->SetWidgetState(vtkContourWidget::Define);
  contourWidget->GetContourRepresentation()->AddNodeAtWorldPosition(pt1);

  //double pt2[3]; pt2[0] = 0.187556; pt2[1] = 0.187556; pt2[2] = 0.42192;
  //contourWidget->GetContourRepresentation()->AddNodeAtWorldPosition(pt2);
 
  contourWidget->EnabledOn();
  interactor->Start();

  return EXIT_SUCCESS;
}



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From omalik91 at gmail.com  Thu Jun 13 17:02:41 2019
From: omalik91 at gmail.com (osm815)
Date: Thu, 13 Jun 2019 14:02:41 -0700 (MST)
Subject: [vtkusers] Update point in real time
Message-ID: <1560459761905-0.post@n5.nabble.com>

Hi everyone,

I'm very new to VTK. I've found it to be quite complicated but have been
familiarizing myself by playing with the tutorial examples (in C++).

The task I'm working on is to have a single point that changes positions in
real time. I have a simple VTK program that draws the initial point.

I have a separate C++ program that I wrote which continuously updates the
position I want the point to move to (x and y coordinates). These values are
obtained from a mouse sensor. I use an infinite while loop to continuously
get the values I need.

>From what I've been able to see, the only way I can update the position of
the point after rendering is to use a callback function. I am using a timer
callback so I can repeatedly enter the function to update the point
position. 

My issue is that I am not sure how to link the two programs. How can I
initialize and render my point and at the same time also read coordinates
from the mouse sensor?

I would appreciate any help and can gladly offer more details if required.

Thanks!



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From coyarzunlaura at googlemail.com  Fri Jun 14 09:07:11 2019
From: coyarzunlaura at googlemail.com (Cristina Oyarzun)
Date: Fri, 14 Jun 2019 15:07:11 +0200
Subject: [vtkusers] CFP: MICCAI CLIP 2019: Clinical Image-based Procedures:
 Towards Holistic Patient Models for Personalised Healthcare
Message-ID: <CANuPjs3F-sko_Fw6-uzxJOt=3Uu2QEGZ5QjUSnmmCAxOUbOgtQ@mail.gmail.com>

CALL FOR PAPERS
MICCAI 2019 Workshop on
Clinical Image-based Procedures: Towards Holistic Patient Models for
Personalised Healthcare


October 17, 2019
Shenzhen, China

Website:http://miccai-clip.org/
==============================
==========================================

SCOPE

CLIP is about the effective translation of computational image-based
techniques into the clinic filling the gaps between medical imaging, basic
science and clinical applications. As it nowadays becomes more and more
important for many clinical applications to base decisions not only on
image data alone, a focus of CLIP 2019 is on the creation of holistic
patient models. Here, image data such as radiologic images, microscopy
images, and photographs is combined with non-image information such as
?omics? data (e.g. genomics, proteomics), life style data, demographics,
EEG, and other to build a more complete picture of the individual patient
and to subsequently provide better diagnosis and therapies.

CLIP 2019 provides a forum for work centered on specific clinical
applications, including techniques and procedures based on comprehensive
clinical image and other data. Submissions related to applications already
in use and evaluated by clinical users are particularly encouraged. We
explicitly welcome novel techniques and applications that are looking at
combining image analysis with clinical data mining and analytics, user
studies, and other heterogeneous data.


TOPICS


* Combination of image analysis with other heterogeneous data including
radiography images, microscopy, photographs, genomics, proteomics, life
style data, EEG, bio-data, and other
* Multimodal image integration for modeling, planning and guidance
* Strategies for patient-specific and anatomical modeling to support
planning and interventions
* Clinical studies employing advanced image-guided methods
* Clinical translation and validation of image-guided systems
* Current challenges and emerging techniques in image-based procedures
* Clinical applications in open and minimally invasive procedures


PAPER SUBMISSION

Papers can be up to 10 pages. All submissions will be peer-reviewed by at
least 3 members of the program committee. Reviewing is double-blind so
authors have to prepare their manuscripts such that their identity cannot
be derived from their submission. The selection of papers will be based on
the significance of results, novelty, technical merit, relevance and
clarity of presentation.

Electronic paper proceedings will be arranged. The papers will be published
in a Springer Lecture Notes in Computer Science (LNCS) proceeding. LNCS is
indexed by Scopus, ACM Digital Library, DBLP, Conference Proceedings
Citation Index (part of Clarivate Analytics? Web of Science), and others.

WORKSHOP FORMAT

Papers will be presented in a day long single track workshop starting with
plenary sessions. The final program will consist of previously unpublished
and contributed papers with substantial time allocated to discussion. A
poster session will accommodate further discussion on new ideas.

IMPORTANT DATES

* July 15, 2019: Paper submission due date
* August 1, 2019: Notification of acceptance
* tbd: Final camera-ready paper submission deadline

CONTACT

Inquires about the workshop should be sent to the Information Desk (
info at miccai-clip.org).

ORGANIZERS (in alphabetical order)

Klaus Drechsler (Fraunhofer IGD, Germany)
Marius Erdt (Fraunhofer IDM at NTU, Singapore)
Miguel Gonz?lez Ballester (ICREA - Universitat Pompeu Fabra, Spain)
Marius George Linguraru (Children's National Medical Center, USA)
Cristina Oyarzun Laura (Fraunhofer IGD, Germany)
Raj Shekhar (Children's National Medical Center, USA)
Stefan Wesarg (Fraunhofer IGD, Germany)
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From tharun160190 at gmail.com  Wed Jun 19 06:32:24 2019
From: tharun160190 at gmail.com (Tharun)
Date: Wed, 19 Jun 2019 03:32:24 -0700 (MST)
Subject: [vtkusers] Use of Tessellation Shader in VTK
Message-ID: <1560940344142-0.post@n5.nabble.com>

I have a triangular mesh(polygons as cells in vtkPolyData). Each point has
different color field data. On using Point Color data as scalars, triangles
have graded color. But, what I want is like in the image below

<http://vtk.1045678.n5.nabble.com/file/t341373/test.png> . 

I know that subdividing the triangular mesh into triangles having  same
color data vertices can give result like this by using Cell data as scalars.

Now, our workflow is similar to  example
<https://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/VisualizationAlgorithms/Cxx/FilledContours.cxx>  
and I have the desired output. Meshes we deal with have 10s of millions of
triangles and the process is quite slow.

I recenlty read about Tessellation Shaders at  here
<http://ogldev.atspace.co.uk/www/tutorial30/tutorial30.html>  , and they
mentioned about "Primitive Generator" part of Tessellation where we can just
mention the tessellation levels of each triangle by gl_TessLevelOuter and
gl_TessLevelInner. I believe, specifying gl_TessLevelOuter for every
triangle of original mesh based on Vertices Color Data for each edge of
triangles solves my problem with performance.

Can anybody please let me know how to do this in VTK?



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From dave.demarle at kitware.com  Thu Jun 20 14:47:39 2019
From: dave.demarle at kitware.com (David E DeMarle)
Date: Thu, 20 Jun 2019 14:47:39 -0400
Subject: [vtkusers] Use of Tessellation Shader in VTK
In-Reply-To: <1560940344142-0.post@n5.nabble.com>
References: <1560940344142-0.post@n5.nabble.com>
Message-ID: <CANjZAi-16iPKCmab5TUK1mqfOFHacpUKL+RujfjCdsYhUQzh9w@mail.gmail.com>

I do not think that tesselation shaders are exposed anywhere yet in VTK.
See vtkShader, vtkShaderProgram and vtkOpenGLPolyData's support for Vertex,
Geometry and Fragment shaders in comparison.

Note, you should re-ask on discourse.vtk.org. The vtk mailing lists are
about to be shut down, and you might have more luck there.

David E DeMarle
Kitware, Inc.
Principal Engineer


On Wed, Jun 19, 2019 at 6:32 AM Tharun <tharun160190 at gmail.com> wrote:

> I have a triangular mesh(polygons as cells in vtkPolyData). Each point has
> different color field data. On using Point Color data as scalars, triangles
> have graded color. But, what I want is like in the image below
>
> <http://vtk.1045678.n5.nabble.com/file/t341373/test.png> .
>
> I know that subdividing the triangular mesh into triangles having  same
> color data vertices can give result like this by using Cell data as
> scalars.
>
> Now, our workflow is similar to  example
> <
> https://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/VisualizationAlgorithms/Cxx/FilledContours.cxx>
>
> and I have the desired output. Meshes we deal with have 10s of millions of
> triangles and the process is quite slow.
>
> I recenlty read about Tessellation Shaders at  here
> <http://ogldev.atspace.co.uk/www/tutorial30/tutorial30.html>  , and they
> mentioned about "Primitive Generator" part of Tessellation where we can
> just
> mention the tessellation levels of each triangle by gl_TessLevelOuter and
> gl_TessLevelInner. I believe, specifying gl_TessLevelOuter for every
> triangle of original mesh based on Vertices Color Data for each edge of
> triangles solves my problem with performance.
>
> Can anybody please let me know how to do this in VTK?
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> 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
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://vtk.org/mailman/listinfo/vtkusers
>
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From b.almatrouk at outlook.com  Fri Jun 21 11:20:41 2019
From: b.almatrouk at outlook.com (German1999)
Date: Fri, 21 Jun 2019 08:20:41 -0700 (MST)
Subject: [vtkusers] vtkBoxWidget get the coordinates of the corners
Message-ID: <1561130441124-0.post@n5.nabble.com>

Hello, I have a software with multiple 3D boxes, every time i click on one of
the boxes a bounding box gets activated as follow:

void selected( vtkRenderWindowInteractor *interactor){
    // enable box widget
    boxWidget = vtkSmartPointer<vtkBoxWidgetRestricted>::New();
    boxWidgetCallback1 = vtkSmartPointer<vtkBoxWidgetCallback1>::New();
    boxWidgetCallback1->setCube(this);

    boxWidget->SetInteractor(interactor);
    double bounds[6]={-1,1,-1,1,-1,1};
    boxWidget->PlaceWidget(bounds);

    vtkSmartPointer<vtkTransform> t=vtkSmartPointer<vtkTransform>::New();
    t->DeepCopy(actor->GetUserTransform());
    boxWidget->SetTransform(t);
    boxWidget->SetHandleSize(0.1);


    boxWidget->AddObserver( vtkCommand::InteractionEvent, boxWidgetCallback1
);
    boxWidget->On();
}

Now I also would like that when I select the box, the corners of the
bounding box get printed. I know you can get the bounds from the bounding
box but is there a possible way to actually get the corners coordinates?



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From wutongxiaomo at gmail.com  Tue Jun 25 03:04:38 2019
From: wutongxiaomo at gmail.com (WtDMaO)
Date: Tue, 25 Jun 2019 00:04:38 -0700 (MST)
Subject: [vtkusers] How to Highlight the specified area on the slices
 obtained by VTKImageReslices
Message-ID: <1561446278791-0.post@n5.nabble.com>

Actually, I consider this matter as a problem of coordinate transformation.
What I want is to highlight the specified area like lesion on the CT.

 This is easy to achieve while the CT is normal like this
<http://vtk.1045678.n5.nabble.com/file/t342766/1P%401%4046%24T__%40HL%7D%25T%25UUYSL.png> 

            SetElement(0, 0, _resliceMatrix, 1);
            SetElement(0, 1, _resliceMatrix, 0);
            SetElement(0, 2, _resliceMatrix, 0);

            SetElement(1, 0, _resliceMatrix, 0);
            SetElement(1, 1, _resliceMatrix, 1);
            SetElement(1, 2, _resliceMatrix, 0);

            SetElement(2, 0, _resliceMatrix, 0);
            SetElement(2, 1, _resliceMatrix, 0);
            SetElement(2, 2, _resliceMatrix, 1);

            SetElement(3, 0, _resliceMatrix, 44);
            SetElement(3, 1, _resliceMatrix, 143);
            SetElement(3, 2, _resliceMatrix, 81);
            SetElement(3, 3, _resliceMatrix, 1);

However I have to use vtkimagereslice to get some special effect like this,
so I changed the direction of three axis like below 
<http://vtk.1045678.n5.nabble.com/file/t342766/Z%28%7E%5DJ%5D%5DH%24_Y69HQZ9XAY7%5B2.png> 

            SetElement(0, 0, _resliceMatrix, 16 / Math.Sqrt(378));
            SetElement(0, 1, _resliceMatrix, -11 / Math.Sqrt(378));
            SetElement(0, 2, _resliceMatrix, -1 / Math.Sqrt(378));

            SetElement(1, 0, _resliceMatrix, -2 / Math.Sqrt(14));
            SetElement(1, 1, _resliceMatrix, -3 / Math.Sqrt(14));
            SetElement(1, 2, _resliceMatrix, 1 / Math.Sqrt(14));

            SetElement(2, 0, _resliceMatrix, 1 / Math.Sqrt(27));
            SetElement(2, 1, _resliceMatrix, 1 / Math.Sqrt(27));
            SetElement(2, 2, _resliceMatrix, 5 / Math.Sqrt(27));

            SetElement(3, 0, _resliceMatrix, 44);
            SetElement(3, 1, _resliceMatrix, 143);
            SetElement(3, 2, _resliceMatrix, 81);
            SetElement(3, 3, _resliceMatrix, 1);

So the key problem is that I have known the position (x,y,z) of lesion, How
can I get the lesion position in the picture after the rotation and
translation by VTKImageReslice. I have tried to use the _resliceMatrix but
it doesn't work, the new point(x',y',z') I got is wrong .

            vtkImageData resliced = imageReslice.GetOutput();
            _Image = ImageData2Bitmap(resliced, 1600, -400);

And I've got another situation, after the code above, I found the position I
need acctually is the Drawing Coordinate System.
<http://vtk.1045678.n5.nabble.com/file/t342766/Z%28%7E%5DJ%5D%5DH%24_Y69HQZ9XAY7%5B2.png> 

If I highlight the position (0,0), it will highlight the left corner of the
image. 

This has bothered me for one week, any help will be appreciated ??




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From wutongxiaomo at gmail.com  Tue Jun 25 04:12:48 2019
From: wutongxiaomo at gmail.com (WtDMaO)
Date: Tue, 25 Jun 2019 01:12:48 -0700 (MST)
Subject: [vtkusers] How to create resliceAxes from two points in a curve?
In-Reply-To: <726161967.4757822.1552609967405@mail.yahoo.com>
References: <1552418540207-0.post@n5.nabble.com>
 <CAFWHfKNZMT_1=V3B_Og0cNgpUs0iQcVukTebheiQBz00xzjEEg@mail.gmail.com>
 <726161967.4757822.1552609967405@mail.yahoo.com>
Message-ID: <1561450368120-0.post@n5.nabble.com>

Hi~I've come across the same problem like you.

I wonder if you have solved your problem? It will be appreciated if you can
share your solution.



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From sunayanag at gmail.com  Thu Jun 27 11:06:43 2019
From: sunayanag at gmail.com (sunayanag)
Date: Thu, 27 Jun 2019 08:06:43 -0700 (MST)
Subject: [vtkusers] vtkm help with using the CleanGrid filter
Message-ID: <1561648003180-0.post@n5.nabble.com>

Hi All,

Just started using vtk-m and having some issues with the CleanGrid filter.
Assuming that vtkMesh is an object of type vtkSmartPointer<vtkPolyData>,
here is the piece of code

vtkm::cont::DataSet mMesh = tovtkm::Convert(vtkMesh,
tovtkm::FieldsFlag::PointsAndCells);
vtkm::filter::CleanGrid cleanGrid;

try 
{
    vtkm::cont::DataSet outMesh = cleanGrid.Execute(mMesh);
}
 catch(std::exception& e)
 {
     std::cerr << e.what();
}

where the exception thrown is: /Could not find appropriate cast for cell
set./

could anyone help with what I am getting wrong.

Thanks
Sunayana



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From allison.vacanti at kitware.com  Thu Jun 27 11:14:25 2019
From: allison.vacanti at kitware.com (Allie Vacanti)
Date: Thu, 27 Jun 2019 11:14:25 -0400
Subject: [vtkusers] vtkm help with using the CleanGrid filter
In-Reply-To: <1561648003180-0.post@n5.nabble.com>
References: <1561648003180-0.post@n5.nabble.com>
Message-ID: <CA+=e1oua9=9jTiV+faGPVpjBCpYY5jJHbWRA5eRcqE1ZFbL-YQ@mail.gmail.com>

For the clean grid filter, you can just use the `vtkmCleanGrid` filter in
VTK, which takes care of the conversions and everything for you.

If you want to use the vtk-m filters directly with a dataset built using
tovtkm::Convert, it is necessary to pass a Policy to the filter so that it
is aware of the custom data structures used to adapt VTK into VTK-m. See
the Accelerators/Vtkm/vtkmCleanGrid.cxx file in VTK for an example of this:

#include "vtkmFilterPolicy.h"

vtkmInputFilterPolicy policy;

vtkm::filter::CleanGrid filter;

auto result = filter.Execute(in, policy);

HTH, Allie

On Thu, Jun 27, 2019 at 11:06 AM sunayanag <sunayanag at gmail.com> wrote:

> Hi All,
>
> Just started using vtk-m and having some issues with the CleanGrid filter.
> Assuming that vtkMesh is an object of type vtkSmartPointer<vtkPolyData>,
> here is the piece of code
>
> vtkm::cont::DataSet mMesh = tovtkm::Convert(vtkMesh,
> tovtkm::FieldsFlag::PointsAndCells);
> vtkm::filter::CleanGrid cleanGrid;
>
> try
> {
>     vtkm::cont::DataSet outMesh = cleanGrid.Execute(mMesh);
> }
>  catch(std::exception& e)
>  {
>      std::cerr << e.what();
> }
>
> where the exception thrown is: /Could not find appropriate cast for cell
> set./
>
> could anyone help with what I am getting wrong.
>
> Thanks
> Sunayana
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
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From tharun160190 at gmail.com  Thu Jun 27 21:10:05 2019
From: tharun160190 at gmail.com (Tharun)
Date: Thu, 27 Jun 2019 18:10:05 -0700 (MST)
Subject: [vtkusers] Use of Tessellation Shader in VTK
In-Reply-To: <CANjZAi-16iPKCmab5TUK1mqfOFHacpUKL+RujfjCdsYhUQzh9w@mail.gmail.com>
References: <1560940344142-0.post@n5.nabble.com>
 <CANjZAi-16iPKCmab5TUK1mqfOFHacpUKL+RujfjCdsYhUQzh9w@mail.gmail.com>
Message-ID: <1561684205979-0.post@n5.nabble.com>

Thank you for the response. I have asked on the discourse and my issue is
resolved now.



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From sunayanag at gmail.com  Fri Jun 28 06:21:27 2019
From: sunayanag at gmail.com (sunayanag)
Date: Fri, 28 Jun 2019 03:21:27 -0700 (MST)
Subject: [vtkusers] vtkm help with using the CleanGrid filter
In-Reply-To: <CA+=e1oua9=9jTiV+faGPVpjBCpYY5jJHbWRA5eRcqE1ZFbL-YQ@mail.gmail.com>
References: <1561648003180-0.post@n5.nabble.com>
 <CA+=e1oua9=9jTiV+faGPVpjBCpYY5jJHbWRA5eRcqE1ZFbL-YQ@mail.gmail.com>
Message-ID: <1561717287494-0.post@n5.nabble.com>

Thanks for your reply Allie, I looked into the vtkmCleanGrid.cxx file and
tried to reproduce the code  :

auto fieldsFlag = tovtkm::FieldsFlag::None;
vtkm::cont::DataSet in = tovtkm::Convert(vtkMesh, fieldsFlag);
 //apply the filter
 vtkmInputFilterPolicy policy;
 vtkm::filter::CleanGrid filter;
filter.SetCompactPointFields(false);
auto result = filter.Execute(in, policy);

and end up getting the following error :
include\vtk-8.2\vtkm/internal/ListTagDetail.h(207): error C2027: use of
undefined type 'vtkm::cont::vtkmCellSetExplicitAOS'

I also tried using the directly the vtkmCleanGrid class, in this case it
worked where the output was of type vtkUnstructuredGrid which I converted
back to vtkPolyData using the vtkDataSetSurfaceFilter.

Thanks
Sunayana




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From allison.vacanti at kitware.com  Fri Jun 28 09:41:32 2019
From: allison.vacanti at kitware.com (Allie Vacanti)
Date: Fri, 28 Jun 2019 09:41:32 -0400
Subject: [vtkusers] vtkm help with using the CleanGrid filter
In-Reply-To: <1561717287494-0.post@n5.nabble.com>
References: <1561648003180-0.post@n5.nabble.com>
 <CA+=e1oua9=9jTiV+faGPVpjBCpYY5jJHbWRA5eRcqE1ZFbL-YQ@mail.gmail.com>
 <1561717287494-0.post@n5.nabble.com>
Message-ID: <CA+=e1ovLxdJ35nN+2OCSRXxMaqu--Jr3zY7gWxrveHSHy7iJBQ@mail.gmail.com>

On Fri, Jun 28, 2019 at 6:21 AM sunayanag <sunayanag at gmail.com> wrote:

> Thanks for your reply Allie, I looked into the vtkmCleanGrid.cxx file and
> tried to reproduce the code  :
>
> auto fieldsFlag = tovtkm::FieldsFlag::None;
> vtkm::cont::DataSet in = tovtkm::Convert(vtkMesh, fieldsFlag);
>  //apply the filter
>  vtkmInputFilterPolicy policy;
>  vtkm::filter::CleanGrid filter;
> filter.SetCompactPointFields(false);
> auto result = filter.Execute(in, policy);
>
> and end up getting the following error :
> include\vtk-8.2\vtkm/internal/ListTagDetail.h(207): error C2027: use of
> undefined type 'vtkm::cont::vtkmCellSetExplicitAOS'
>

You can include the file "vtkmCellSetExplicit.h" to fix that. You might
also need to include "vtkmCellSetSingleType.h" if you see errors about
single type cellsets being undefined.


> I also tried using the directly the vtkmCleanGrid class, in this case it
> worked where the output was of type vtkUnstructuredGrid which I converted
> back to vtkPolyData using the vtkDataSetSurfaceFilter.


If you use the vtkm filter directly, it should work to use the
fromvtk::Convert method from Accelerators/Vtkm/vtkmlib/PolyDataConverter.h
to skip that extra step.
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