# Latest

**URL:** https://discourse.vtk.org/latest.md?page=257

[Latest](https://discourse.vtk.org/latest.md) · [Categories](https://discourse.vtk.org/categories.md) · [Tags](https://discourse.vtk.org/tags.md)

**Page:** 258

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## [Using vtk libraries for writing in xml/vtk fileformat using fortran](https://discourse.vtk.org/t/using-vtk-libraries-for-writing-in-xml-vtk-fileformat-using-fortran/281)

<div class="topic-metadata">

**Author:** [@vrkssai](https://discourse.vtk.org/u/vrkssai)\
**Replies:** 1\
**Last updated:** [February 16, 2019, 5:22am UTC](https://discourse.vtk.org/t/using-vtk-libraries-for-writing-in-xml-vtk-fileformat-using-fortran/281 "2019-02-16T05:22:12Z")

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I was wondering if someone would help me on how to use install,use vtk libraries to write data in binary format in fortran. Or, suitable modifications to write in binary format from a fortran code wrting files in .vtk i…

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## [Interpolating points and direction along a path in 3D space](https://discourse.vtk.org/t/interpolating-points-and-direction-along-a-path-in-3d-space/115)

<div class="topic-metadata">

**Author:** [@kit](https://discourse.vtk.org/u/kit)\
**Replies:** 3\
**Last updated:** [February 16, 2019, 4:23am UTC](https://discourse.vtk.org/t/interpolating-points-and-direction-along-a-path-in-3d-space/115 "2019-02-16T04:23:26Z")

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Hi, This is my first go with discourse, so I hope I am using this correctly. If not feel free to re-file this post. I have a series of points on a path \[(x1,y1,z1)…(xN,yN,zN)\] and a function at the points \[f1,…,fN\] wh…

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## [vtkClipVolume usage](https://discourse.vtk.org/t/vtkclipvolume-usage/272)

<div class="topic-metadata">

**Author:** [@francisco\_munoz](https://discourse.vtk.org/u/francisco_munoz)\
**Replies:** 3\
**Last updated:** [February 15, 2019, 5:26pm UTC](https://discourse.vtk.org/t/vtkclipvolume-usage/272 "2019-02-15T17:26:44Z")

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hi, Im trying to perform a clip on an unstructuredGrid over an scalars value, but cannot get the clipped object (it gives empty) or probably don’t know how to use it. My data doesn’t comes with the scalars but has a lo…

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## [How can I make vtkExtractSelectedIds return a vtkPolyData?](https://discourse.vtk.org/t/how-can-i-make-vtkextractselectedids-return-a-vtkpolydata/280)

<div class="topic-metadata">

**Author:** [@andreasbuykx](https://discourse.vtk.org/u/andreasbuykx)\
**Replies:** 0\
**Last updated:** [February 15, 2019, 1:15pm UTC](https://discourse.vtk.org/t/how-can-i-make-vtkextractselectedids-return-a-vtkpolydata/280 "2019-02-15T13:15:28Z")

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vtkExtractSelectedIds can return extracting cells as polydata even when preserving topology is off (template method vtkExtractSelectedIdsCopyCells is called with vtkPolyData as template argument). However the base class …

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## [VTK 8.90 and modules.json](https://discourse.vtk.org/t/vtk-8-90-and-modules-json/213)

<div class="topic-metadata">

**Author:** [@amaclean](https://discourse.vtk.org/u/amaclean)\
**Replies:** 4\
**Last updated:** [February 14, 2019, 2:36pm UTC](https://discourse.vtk.org/t/vtk-8-90-and-modules-json/213 "2019-02-14T14:36:50Z")

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There is a very nice JSON file generated called modules.json, in the top-level build directory of VTK. It gives a lot of information about modules selected and their dependencies etc., here is a little Python script I p…

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## [Version is repeated in the Linux library .so.0 files](https://discourse.vtk.org/t/version-is-repeated-in-the-linux-library-so-0-files/266)

<div class="topic-metadata">

**Author:** [@amaclean](https://discourse.vtk.org/u/amaclean)\
**Replies:** 3\
**Last updated:** [February 14, 2019, 7:19am UTC](https://discourse.vtk.org/t/version-is-repeated-in-the-linux-library-so-0-files/266 "2019-02-14T07:19:33Z")

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Why is 8.90 duplicated in the name: libvtkCommonColor-8.90.so.8.90.0? I would have expected libvtkCommonColor-8.90.so.0. It is not just libvtkCommonColor following this naming scheme: libvtk\*-8.90.so.8.90.0 Here are t…

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## [Errors during compilation of VTK 7.1.1 and 8.2 using VS2017](https://discourse.vtk.org/t/errors-during-compilation-of-vtk-7-1-1-and-8-2-using-vs2017/269)

<div class="topic-metadata">

**Author:** [@LvR](https://discourse.vtk.org/u/LvR)\
**Replies:** 0\
**Last updated:** [February 13, 2019, 12:04pm UTC](https://discourse.vtk.org/t/errors-during-compilation-of-vtk-7-1-1-and-8-2-using-vs2017/269 "2019-02-13T12:04:11Z")

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Last month I switched to Visual Studio 2017. So I also switched from VTK7.1 to VTK 8.2. But after trying several settings in CMake, I did not manage to compile VTK 8.2 successfully. So I switched back to VTK 7.1.1. But …

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## [Did VTK\_CUSTOM\_LIBRARY\_SUFFIX build option go away?](https://discourse.vtk.org/t/did-vtk-custom-library-suffix-build-option-go-away/220)

<div class="topic-metadata">

**Author:** [@seanm](https://discourse.vtk.org/u/seanm)\
**Replies:** 3\
**Last updated:** [February 13, 2019, 9:47am UTC](https://discourse.vtk.org/t/did-vtk-custom-library-suffix-build-option-go-away/220 "2019-02-13T09:47:05Z")

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Hi all, Did the VTK\_CUSTOM\_LIBRARY\_SUFFIX option go away? I created a new folder and used cmake to configure VTK (git master), but even in ‘advanced mode’ I don’t see it there. Cheers,

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## [Making 3d/2d pointcloud fill window without border/bounding cube](https://discourse.vtk.org/t/making-3d-2d-pointcloud-fill-window-without-border-bounding-cube/260)

<div class="topic-metadata">

**Author:** [@thully](https://discourse.vtk.org/u/thully)\
**Replies:** 1\
**Last updated:** [February 12, 2019, 7:36pm UTC](https://discourse.vtk.org/t/making-3d-2d-pointcloud-fill-window-without-border-bounding-cube/260 "2019-02-12T19:36:56Z")

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Hi, I’m working on an application that displays a LIDAR pointcloud using VTK. It displays the pointcloud in both a 3D view and a 2D overhead view. I initially tried using vtkChartXY and vtkChartXYZ, though I want to us…

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## [Image plane Module](https://discourse.vtk.org/t/image-plane-module/256)

<div class="topic-metadata">

**Author:** [@Anand\_Mulay](https://discourse.vtk.org/u/Anand_Mulay)\
**Replies:** 0\
**Last updated:** [February 11, 2019, 1:53pm UTC](https://discourse.vtk.org/t/image-plane-module/256 "2019-02-11T13:53:24Z")

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How can i use Image plane module of Dicom Data or any other method to get actual XYZ axis of the dicom image , e.g i have a dicom image 512X512 in which i can get XY points raneg in 0-512 starting from Left upper cor…

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## [Multiple colorized sphere objects mapping](https://discourse.vtk.org/t/multiple-colorized-sphere-objects-mapping/252)

<div class="topic-metadata">

**Author:** [@ljc19800331](https://discourse.vtk.org/u/ljc19800331)\
**Replies:** 1\
**Last updated:** [February 11, 2019, 1:08pm UTC](https://discourse.vtk.org/t/multiple-colorized-sphere-objects-mapping/252 "2019-02-11T13:08:39Z")

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Hello, I am going to map the colorized point cloud to the sphere object (with multiple spheres) and generate a viewpoint-invariance object. The problem is that when I change the viewpoint close to the object the coloriz…

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## [Dicom images and progress rendering](https://discourse.vtk.org/t/dicom-images-and-progress-rendering/249)

<div class="topic-metadata">

**Author:** [@Romain](https://discourse.vtk.org/u/Romain)\
**Replies:** 4\
**Last updated:** [February 10, 2019, 7:09am UTC](https://discourse.vtk.org/t/dicom-images-and-progress-rendering/249 "2019-02-10T07:09:06Z")

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Hello everyone, I work with DICOM series. Each series contain around 500 slices. I use the great module vtk-dicom to do all the reading part. During reading of those slices, is it possible to display the slice read? A…

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## [Seg Fault vtkXMLMultiBlockDataSetWriter with vtkPolyData](https://discourse.vtk.org/t/seg-fault-vtkxmlmultiblockdatasetwriter-with-vtkpolydata/237)

<div class="topic-metadata">

**Author:** [@banesullivan](https://discourse.vtk.org/u/banesullivan)\
**Replies:** 2\
**Last updated:** [February 9, 2019, 6:32am UTC](https://discourse.vtk.org/t/seg-fault-vtkxmlmultiblockdatasetwriter-with-vtkpolydata/237 "2019-02-09T06:32:40Z")

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When I try to save a vtkMultiBlockDataSet that contains poly data that only has vertices, the vtkXMLMultiBlockDataSetWriter writer seg faults. Below is a snippet to reproduce this segfault in Python. Does anyone know of…

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## [Modularization dashboard cleanup](https://discourse.vtk.org/t/modularization-dashboard-cleanup/125)

<div class="topic-metadata">

**Author:** [@utkarshayachit](https://discourse.vtk.org/u/utkarshayachit)\
**Replies:** 6\
**Last updated:** [February 8, 2019, 11:10pm UTC](https://discourse.vtk.org/t/modularization-dashboard-cleanup/125 "2019-02-08T23:10:39Z")

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Figured we could use a place to indicate who’s working on what dashboard issue.

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## [How to disable vtkOutputWindow?](https://discourse.vtk.org/t/how-to-disable-vtkoutputwindow/242)

<div class="topic-metadata">

**Author:** [@mdh](https://discourse.vtk.org/u/mdh)\
**Replies:** 2\
**Last updated:** [February 8, 2019, 2:30am UTC](https://discourse.vtk.org/t/how-to-disable-vtkoutputwindow/242 "2019-02-08T02:30:36Z")

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Hello, When an error occurs during the execution of a filter an instance of vtkOutputWindow is created internally in VTK and the error message gets shown. Once shown, the user is unable to kill this output window. I hav…

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## [vtkLogging static cast error](https://discourse.vtk.org/t/vtklogging-static-cast-error/234)

<div class="topic-metadata">

**Author:** [@amaclean](https://discourse.vtk.org/u/amaclean)\
**Replies:** 6\
**Last updated:** [February 7, 2019, 10:21pm UTC](https://discourse.vtk.org/t/vtklogging-static-cast-error/234 "2019-02-07T22:21:50Z")

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@utkarshayachit I’m seeing this casting error: Common/Core/vtkLogger.cxx: In static member function ‘static vtkLogger\* vtkLogger::New()’: Common/Core/vtkObjectFactory.h:339:39: error: invalid static\_cast from type ‘vtkO…

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## [Bug with depth peeling and offscreen rendering to an image](https://discourse.vtk.org/t/bug-with-depth-peeling-and-offscreen-rendering-to-an-image/223)

<div class="topic-metadata">

**Author:** [@SergeLalonde](https://discourse.vtk.org/u/SergeLalonde)\
**Replies:** 3\
**Last updated:** [February 7, 2019, 3:59pm UTC](https://discourse.vtk.org/t/bug-with-depth-peeling-and-offscreen-rendering-to-an-image/223 "2019-02-07T15:59:44Z")

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I’m currently using VTK 8.1.1. My renderer has depth peeling enabled. When I render translucent objects to an image using vtkPNGWriter and offscreen rendering turned on, the renderer only succeeds the first time it’s r…

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## [VTKExamples Supports New VTK Module API](https://discourse.vtk.org/t/vtkexamples-supports-new-vtk-module-api/238)

<div class="topic-metadata">

**Author:** [@lorensen](https://discourse.vtk.org/u/lorensen)\
**Replies:** 0\
**Last updated:** [February 7, 2019, 6:22am UTC](https://discourse.vtk.org/t/vtkexamples-supports-new-vtk-module-api/238 "2019-02-07T06:22:10Z")

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We are pleased to announce that the VTK Examples Project now works with both the old and new vtk module API. The new VTK Module API is a complete replacement for the old API. The VTKExamples individual examples and CM…

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## [ALL\_BUILD Access Denied](https://discourse.vtk.org/t/all-build-access-denied/231)

<div class="topic-metadata">

**Author:** [@fengting](https://discourse.vtk.org/u/fengting)\
**Replies:** 3\
**Last updated:** [February 6, 2019, 9:03pm UTC](https://discourse.vtk.org/t/all-build-access-denied/231 "2019-02-06T21:03:40Z")

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I am new to VTK, and I am trying to compiling&installing C++ VTK. I have downloaded VTK-8.2.0 and follow the instruction like this : The VTK source code can be downloaded from http://www.vtk.org/ on the Download page…

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## [Show the cage axes](https://discourse.vtk.org/t/show-the-cage-axes/216)

<div class="topic-metadata">

**Author:** [@cimo](https://discourse.vtk.org/u/cimo)\
**Replies:** 1\
**Last updated:** [February 6, 2019, 3:50pm UTC](https://discourse.vtk.org/t/show-the-cage-axes/216 "2019-02-06T15:50:14Z")

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Hello! I would like to display CubAxes of an object. For that I used vtkCubeAxesActor and I would like to display the static axes on all the edges (figure for example). using vtkCubeAxesActor calss ------\> Any ide…

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## [Arbitary Order Lagrange Hexahedron Connectivity](https://discourse.vtk.org/t/arbitary-order-lagrange-hexahedron-connectivity/76)

<div class="topic-metadata">

**Author:** [@vrkssai](https://discourse.vtk.org/u/vrkssai)\
**Replies:** 1\
**Last updated:** [February 5, 2019, 8:32pm UTC](https://discourse.vtk.org/t/arbitary-order-lagrange-hexahedron-connectivity/76 "2019-02-05T20:32:04Z")

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The new versions of VTK&ParaView(5.5 and above) supports arbitary order lagrange hexahedron elements. The ordering of the points (lagrange points facepoints+interior+corners)associated with the elements hasn’t been provi…

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## [GCC 8.2 Warning in Testing](https://discourse.vtk.org/t/gcc-8-2-warning-in-testing/222)

<div class="topic-metadata">

**Author:** [@lorensen](https://discourse.vtk.org/u/lorensen)\
**Replies:** 1\
**Last updated:** [February 5, 2019, 7:06pm UTC](https://discourse.vtk.org/t/gcc-8-2-warning-in-testing/222 "2019-02-05T19:06:21Z")

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Folks, The following warnings are present with the gcc 8.2 compiler. They occur in the test cxx files. Building CXX object Common/Core/Testing/Cxx/CMakeFiles/vtkCommonCoreCxxTests.dir/vtkCommonCoreCxxTests.cxx.o In …

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## [Using Discourse as a mailing list](https://discourse.vtk.org/t/using-discourse-as-a-mailing-list/53)

<div class="topic-metadata">

**Author:** [@cory.quammen](https://discourse.vtk.org/u/cory.quammen)\
**Replies:** 0\
**Last updated:** [January 21, 2019, 2:47pm UTC](https://discourse.vtk.org/t/using-discourse-as-a-mailing-list/53 "2019-01-21T14:47:39Z")

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Instructions adapted from https://discourse.paraview.org/t/using-discourse-as-a-mailing-list Click your user icon, then the gear icon to go to your user Preferences From the left pane, click Emails Click E…

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## [Dicom and three planes](https://discourse.vtk.org/t/dicom-and-three-planes/205)

<div class="topic-metadata">

**Author:** [@jdanvals](https://discourse.vtk.org/u/jdanvals)\
**Replies:** 2\
**Last updated:** [February 4, 2019, 12:23pm UTC](https://discourse.vtk.org/t/dicom-and-three-planes/205 "2019-02-04T12:23:12Z")

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Hello, i trying to create dicom viewer with three planes like in photo I find example - Medical/MedicalDemo3/ - but it in 3d style. Another example to difficult for me https://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples…

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## [Reverse thread history](https://discourse.vtk.org/t/reverse-thread-history/201)

<div class="topic-metadata">

**Author:** [@toddy](https://discourse.vtk.org/u/toddy)\
**Replies:** 5\
**Last updated:** [February 2, 2019, 2:01am UTC](https://discourse.vtk.org/t/reverse-thread-history/201 "2019-02-02T02:01:33Z")

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It would be nice if the latest post in a topic appeared at the top of the page rather than the bottom. Is it possible to reverse the layout?

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## [VTK Support on VTK Discourse feels overly repetitve](https://discourse.vtk.org/t/vtk-support-on-vtk-discourse-feels-overly-repetitve/182)

<div class="topic-metadata">

**Author:** [@cryos](https://discourse.vtk.org/u/cryos)\
**Replies:** 4\
**Last updated:** [February 1, 2019, 6:25pm UTC](https://discourse.vtk.org/t/vtk-support-on-vtk-discourse-feels-overly-repetitve/182 "2019-02-01T18:25:07Z")

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We are already on the VTK specific Discourse, and so specifying VTK Support rather than just support feels overly repetitive. Even more so when using Discourse in mailing list mode and seeing posts tagged \[VTK\]\[VTK Suppo…

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## [vtkUnstructuredGrid Phong and Gouraud shading](https://discourse.vtk.org/t/vtkunstructuredgrid-phong-and-gouraud-shading/198)

<div class="topic-metadata">

**Author:** [@nebulaekg](https://discourse.vtk.org/u/nebulaekg)\
**Replies:** 0\
**Last updated:** [February 1, 2019, 5:34pm UTC](https://discourse.vtk.org/t/vtkunstructuredgrid-phong-and-gouraud-shading/198 "2019-02-01T17:34:49Z")

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Hi, I am new to VTK and try to figure out how to do Phong and Gouraud shading for a vtkUnstructuredGrid. I have tried vtkUnstructuredGrid --\> vtkDataSetSurfaceFilter --\> vtkPolyDataNormals --\> mapper, but still cannot ge…

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## [is it possible to use a PNG image as an icon entry of a vtkLegendBoxActor ?](https://discourse.vtk.org/t/is-it-possible-to-use-a-png-image-as-an-icon-entry-of-a-vtklegendboxactor/194)

<div class="topic-metadata">

**Author:** [@embeddedmz](https://discourse.vtk.org/u/embeddedmz)\
**Replies:** 0\
**Last updated:** [February 1, 2019, 10:27am UTC](https://discourse.vtk.org/t/is-it-possible-to-use-a-png-image-as-an-icon-entry-of-a-vtklegendboxactor/194 "2019-02-01T10:27:13Z")

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Hi, The question is in the title. I tried that, but I only got a black square instead of the image. vtkNew\<vtkPNGReader\> reader; reader-\>SetFileName("icon.png"); vtkImageData\* icon = reader-\>GetOutput(); ... vtkSmartP…

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## [Allow links for new users](https://discourse.vtk.org/t/allow-links-for-new-users/188)

<div class="topic-metadata">

**Author:** [@banesullivan](https://discourse.vtk.org/u/banesullivan)\
**Replies:** 1\
**Last updated:** [February 1, 2019, 9:54am UTC](https://discourse.vtk.org/t/allow-links-for-new-users/188 "2019-02-01T09:54:13Z")

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I’m not allowed more than two links in my post :frowning:

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## [Subsampling UnstructuredGrid](https://discourse.vtk.org/t/subsampling-unstructuredgrid/190)

<div class="topic-metadata">

**Author:** [@mdh](https://discourse.vtk.org/u/mdh)\
**Replies:** 0\
**Last updated:** [February 1, 2019, 2:32am UTC](https://discourse.vtk.org/t/subsampling-unstructuredgrid/190 "2019-02-01T02:32:28Z")

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Hello, Is there a filter that I can use to sub-sample an unstructured grid?

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