# Development

**URL:** https://discourse.vtk.org/c/development/7.md?page=9

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

**Page:** 10

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## [edge rendering issue on mac m1](https://discourse.vtk.org/t/edge-rendering-issue-on-mac-m1/14638)

<div class="topic-metadata">

**Author:** [@frankham](https://discourse.vtk.org/u/frankham)\
**Replies:** 5\
**Last updated:** [October 3, 2024, 2:03am UTC](https://discourse.vtk.org/t/edge-rendering-issue-on-mac-m1/14638 "2024-10-03T02:03:14Z")

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I am writing an application that renders edges using simple lines with coloring based on a scalar value and lookup table. On linux and my older intel-based mac the following simple example works as expected, with edge co…

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## [I've solved some building problems and run a example successfully!](https://discourse.vtk.org/t/ive-solved-some-building-problems-and-run-a-example-successfully/14647)

<div class="topic-metadata">

**Author:** [@Etzka](https://discourse.vtk.org/u/Etzka)\
**Replies:** 0\
**Last updated:** [October 2, 2024, 7:43am UTC](https://discourse.vtk.org/t/ive-solved-some-building-problems-and-run-a-example-successfully/14647 "2024-10-02T07:43:34Z")

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there will be lnk errors when building vtk-source into static libs under version 9.3.1, i was replied that that will be available in 9.4 (November, 2024), wait and see it! i’ve built for dll libs, when the configuration…

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## [load and display heavy dicom series](https://discourse.vtk.org/t/load-and-display-heavy-dicom-series/4140)

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**Author:** [@pierrectl](https://discourse.vtk.org/u/pierrectl)\
**Replies:** 8\
**Last updated:** [September 30, 2024, 3:10am UTC](https://discourse.vtk.org/t/load-and-display-heavy-dicom-series/4140 "2024-09-30T03:10:02Z")

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Hi everyone, my goal is to load and display two dicom series into my own application in two different threads, so I decided to use vtk dicom loader. I use this code snippet: https://vtk.org/Wiki/VTK/Examples/Cxx/IO/Read…

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## [macOS CI now using Xcode 15.4](https://discourse.vtk.org/t/macos-ci-now-using-xcode-15-4/14630)

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**Author:** [@ben.boeckel](https://discourse.vtk.org/u/ben.boeckel)\
**Replies:** 0\
**Last updated:** [September 28, 2024, 4:23am UTC](https://discourse.vtk.org/t/macos-ci-now-using-xcode-15-4/14630 "2024-09-28T04:23:24Z")

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Hi all, Once this MR lands, VTK’s CI will be using Xcode 15.4. Due to Apple macOS/Xcode compatibility alignments and some reinstallations to resolve odd errors on some CI machines (which updated to the latest macOS vers…

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## [Multiple render windows for vtkWasm](https://discourse.vtk.org/t/multiple-render-windows-for-vtkwasm/14246)

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**Author:** [@Jens\_Munk\_Hansen](https://discourse.vtk.org/u/Jens_Munk_Hansen)\
**Replies:** 1\
**Last updated:** [September 25, 2024, 7:17pm UTC](https://discourse.vtk.org/t/multiple-render-windows-for-vtkwasm/14246 "2024-09-25T19:17:03Z")

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Hi Guys I have a working setup using two vtkWebAssembly....Windows. It is super nasty. I stop and resume the message loop when the mouse enters a window. Here, I set all interactors to nullptr and set my interactor to t…

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## [VTK LookupLable or CellData problem?](https://discourse.vtk.org/t/vtk-lookuplable-or-celldata-problem/14617)

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**Author:** [@baoyumi30](https://discourse.vtk.org/u/baoyumi30)\
**Replies:** 0\
**Last updated:** [September 25, 2024, 8:13am UTC](https://discourse.vtk.org/t/vtk-lookuplable-or-celldata-problem/14617 "2024-09-25T08:13:07Z")

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I wanna have reflect CellData colors to the object,but the result is platelike,disperse, and does not have color changes,the vtkScalarBarActor also has this problem.vtkPolyData \*data; vtkSmartPointer\<vtkPolyData\> poly…

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## [More Pythonic VTK wrapping](https://discourse.vtk.org/t/more-pythonic-vtk-wrapping/13092)

<div class="topic-metadata">

**Author:** [@berk.geveci](https://discourse.vtk.org/u/berk.geveci)\
**Replies:** 114\
**Last updated:** [September 18, 2024, 9:13am UTC](https://discourse.vtk.org/t/more-pythonic-vtk-wrapping/13092 "2024-09-18T09:13:59Z")

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Hi everyone. I wanted to keep you appraised of new work we are doing to improve the VTK Python interface. The part I will discuss here is at the wrapper level and applies to all of VTK. PS: The VTK wrapper is the piece…

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## [In volume rendering, how to set the rendering result to not blur when rotating the camera](https://discourse.vtk.org/t/in-volume-rendering-how-to-set-the-rendering-result-to-not-blur-when-rotating-the-camera/11294)

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**Author:** [@marlon.ma](https://discourse.vtk.org/u/marlon.ma)\
**Replies:** 6\
**Last updated:** [September 16, 2024, 3:08am UTC](https://discourse.vtk.org/t/in-volume-rendering-how-to-set-the-rendering-result-to-not-blur-when-rotating-the-camera/11294 "2024-09-16T03:08:01Z")

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The question is what I want to ask

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## [Save Triangle Mesh in std::vector using SMPtools](https://discourse.vtk.org/t/save-triangle-mesh-in-std-vector-using-smptools/14561)

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**Author:** [@Rafael\_Scatena](https://discourse.vtk.org/u/Rafael_Scatena)\
**Replies:** 2\
**Last updated:** [September 12, 2024, 1:32am UTC](https://discourse.vtk.org/t/save-triangle-mesh-in-std-vector-using-smptools/14561 "2024-09-12T01:32:57Z")

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Hello, I\`m trying to save my 3 million triangle polydata with 2 scalar fields in a std::vector with SMPtools. But I get an error in the vtkDataArrayTupleRange\_AOS. I tryed to print the begin and end tuples to check wha…

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## [SetSlice function in vtkResliceImageViewer is not properly working.](https://discourse.vtk.org/t/setslice-function-in-vtkresliceimageviewer-is-not-properly-working/14559)

<div class="topic-metadata">

**Author:** [@dhanushkannan](https://discourse.vtk.org/u/dhanushkannan)\
**Replies:** 4\
**Last updated:** [September 11, 2024, 12:37pm UTC](https://discourse.vtk.org/t/setslice-function-in-vtkresliceimageviewer-is-not-properly-working/14559 "2024-09-11T12:37:59Z")

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I am developing a Qt application using C++ to display the three dicom views and perform interaction between them. I have displayed DICOM using vtkSmartPointer resliceImageViewer-\>SetSlice(100); should set the dicom …

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## [How to use \`CMAKE\_INSTALL\_PREFIX\` to solve \`The \`MODULE\_DESTINATION\` must not be an absolute path.\` error](https://discourse.vtk.org/t/how-to-use-cmake-install-prefix-to-solve-the-module-destination-must-not-be-an-absolute-path-error/14531)

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**Author:** [@azmyin12](https://discourse.vtk.org/u/azmyin12)\
**Replies:** 3\
**Last updated:** [September 6, 2024, 5:08pm UTC](https://discourse.vtk.org/t/how-to-use-cmake-install-prefix-to-solve-the-module-destination-must-not-be-an-absolute-path-error/14531 "2024-09-06T17:08:00Z")

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Hello, I am in the process of upgrading MIT’s LabelFusion, an open-source RGBD data annotation tool for use in Ubuntu 22.04. It uses their in-house Direction app that used to use VTK \<=4.8. Since Ubuntu 22.04 comes equ…

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## [VTK & Qt: rendering issues when drawing thick lines](https://discourse.vtk.org/t/vtk-qt-rendering-issues-when-drawing-thick-lines/13903)

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**Author:** [@dkutak](https://discourse.vtk.org/u/dkutak)\
**Replies:** 19\
**Last updated:** [September 5, 2024, 5:56am UTC](https://discourse.vtk.org/t/vtk-qt-rendering-issues-when-drawing-thick-lines/13903 "2024-09-05T05:56:59Z")

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Hello, We are using Qt 5.15.7 and VTK 9.2.2. After the update from VTK 8.2.0, we started to encounter strange line-rendering issues that did not occur before. These issues apply to all lines that are rendered with thick…

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## [Is there support for the maximum intensity blending mode in vtkMultiVolume? I have a shader compile error](https://discourse.vtk.org/t/is-there-support-for-the-maximum-intensity-blending-mode-in-vtkmultivolume-i-have-a-shader-compile-error/14525)

<div class="topic-metadata">

**Author:** [@Anton\_Botnov](https://discourse.vtk.org/u/Anton_Botnov)\
**Replies:** 0\
**Last updated:** [September 4, 2024, 1:05pm UTC](https://discourse.vtk.org/t/is-there-support-for-the-maximum-intensity-blending-mode-in-vtkmultivolume-i-have-a-shader-compile-error/14525 "2024-09-04T13:05:30Z")

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Hello, community. I am using VTK С++ version 9.1.0 and needed the functionality of vtkMultiVolume for rendering multiple volumes simultaneously. It is important for me to use the maximum intensity blending mode. However,…

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## [Error Render while mapping image to color](https://discourse.vtk.org/t/error-render-while-mapping-image-to-color/14517)

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**Author:** [@Hai\_Hai](https://discourse.vtk.org/u/Hai_Hai)\
**Replies:** 2\
**Last updated:** [September 4, 2024, 1:23am UTC](https://discourse.vtk.org/t/error-render-while-mapping-image-to-color/14517 "2024-09-04T01:23:19Z")

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When I use the following program to perform window rendering, OpenGL errors and warnings appear. Without using the colormap in the program, the program returns to normal. I don’t know how to solve this problem or if ther…

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## [Default argument value vs. overload](https://discourse.vtk.org/t/default-argument-value-vs-overload/14498)

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**Author:** [@lassoan](https://discourse.vtk.org/u/lassoan)\
**Replies:** 5\
**Last updated:** [September 2, 2024, 2:25am UTC](https://discourse.vtk.org/t/default-argument-value-vs-overload/14498 "2024-09-02T02:25:13Z")

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Recently the following was added to the VTK coding conventions document: Prefer overloading functions to default arguments. Rationale: Default function arguments in C++ are a tempting way to add an argument to a func…

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## [Could multiple vtkCharts / vtkChartMatrix be added to single vtkContextView?](https://discourse.vtk.org/t/could-multiple-vtkcharts-vtkchartmatrix-be-added-to-single-vtkcontextview/14512)

<div class="topic-metadata">

**Author:** [@Northern\_Condor1](https://discourse.vtk.org/u/Northern_Condor1)\
**Replies:** 1\
**Last updated:** [September 1, 2024, 8:42pm UTC](https://discourse.vtk.org/t/could-multiple-vtkcharts-vtkchartmatrix-be-added-to-single-vtkcontextview/14512 "2024-09-01T20:42:02Z")

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Hello dear VTK developers! Could you clarify the use cases of vtkContextView? Could I add multiple charts to it? VtkChartMatrix? Thank you :grinning:

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## [vtk reslice transform](https://discourse.vtk.org/t/vtk-reslice-transform/14504)

<div class="topic-metadata">

**Author:** [@deldev](https://discourse.vtk.org/u/deldev)\
**Replies:** 0\
**Last updated:** [August 29, 2024, 4:18pm UTC](https://discourse.vtk.org/t/vtk-reslice-transform/14504 "2024-08-29T16:18:45Z")

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I have a vtk image data 512 512 245 and mask data 128 128 9 . need to place mask 4th slice in centre slice of larger data in axial view using image viewer at pos 100,150,123… how to reposition and slice using vtkIageresl…

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## [How to obtain axial slices of multiple volumes and display them in the same randerer as MultiVolume？](https://discourse.vtk.org/t/how-to-obtain-axial-slices-of-multiple-volumes-and-display-them-in-the-same-randerer-as-multivolume/14439)

<div class="topic-metadata">

**Author:** [@Hai\_Hai](https://discourse.vtk.org/u/Hai_Hai)\
**Replies:** 1\
**Last updated:** [August 28, 2024, 7:43pm UTC](https://discourse.vtk.org/t/how-to-obtain-axial-slices-of-multiple-volumes-and-display-them-in-the-same-randerer-as-multivolume/14439 "2024-08-28T19:43:37Z")

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I used vtkImageReslice to obtain slices for each axis and was able to fuse multiple slices. However, after using vtkImageMapToColors, there was a problem where the projection relationship between the color mapped image a…

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## [Get Oblique Slices from Vtkreliceimageviewer](https://discourse.vtk.org/t/get-oblique-slices-from-vtkreliceimageviewer/14479)

<div class="topic-metadata">

**Author:** [@christeen](https://discourse.vtk.org/u/christeen)\
**Replies:** 1\
**Last updated:** [August 26, 2024, 10:04pm UTC](https://discourse.vtk.org/t/get-oblique-slices-from-vtkreliceimageviewer/14479 "2024-08-26T22:04:49Z")

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I just want to setup a curve in vtkresliceimageviewer (axial view- drawing tooth curve) and able to setup to extract multi oblique slices(single / multi slices) using any methods and slice extraction is been limited to t…

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## [Availability of VTK Modules for iOS](https://discourse.vtk.org/t/availability-of-vtk-modules-for-ios/14447)

<div class="topic-metadata">

**Author:** [@adarhefer](https://discourse.vtk.org/u/adarhefer)\
**Replies:** 5\
**Last updated:** [August 26, 2024, 8:43pm UTC](https://discourse.vtk.org/t/availability-of-vtk-modules-for-ios/14447 "2024-08-26T20:43:16Z")

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Hello, I have a an application for macOS that utilizes quite a few modules, and almost none of them are available for iOS. Here’s the list of dylib modules I’m using so far: libvtkCommonCore libvtkCommonMisc libvtkComm…

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## [Clipping breaks the Hexahedron adjacent to the Polyhedron](https://discourse.vtk.org/t/clipping-breaks-the-hexahedron-adjacent-to-the-polyhedron/12164)

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**Author:** [@Kenichiro-Yoshimi](https://discourse.vtk.org/u/Kenichiro-Yoshimi)\
**Replies:** 4\
**Last updated:** [August 24, 2024, 4:15pm UTC](https://discourse.vtk.org/t/clipping-breaks-the-hexahedron-adjacent-to-the-polyhedron/12164 "2024-08-24T16:15:25Z")

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Hi, I am currently trying to create a cut-cell program to cut cartesian grids with watertight PolyData. Once this is completed, unlike vtkDelaunay3D, volumes can be created for concave PolyData. (The cut-cell program is…

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## [How to Manipulate a Screw in vtkSlicerImageViewer like the video.](https://discourse.vtk.org/t/how-to-manipulate-a-screw-in-vtkslicerimageviewer-like-the-video/14430)

<div class="topic-metadata">

**Author:** [@wulicheng](https://discourse.vtk.org/u/wulicheng)\
**Replies:** 0\
**Last updated:** [August 20, 2024, 6:27am UTC](https://discourse.vtk.org/t/how-to-manipulate-a-screw-in-vtkslicerimageviewer-like-the-video/14430 "2024-08-20T06:27:54Z")

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## [memory access error in vtkrenderwindow-\>render procedure](https://discourse.vtk.org/t/memory-access-error-in-vtkrenderwindow-render-procedure/14381)

<div class="topic-metadata">

**Author:** [@grant](https://discourse.vtk.org/u/grant)\
**Replies:** 4\
**Last updated:** [August 12, 2024, 1:36pm UTC](https://discourse.vtk.org/t/memory-access-error-in-vtkrenderwindow-render-procedure/14381 "2024-08-12T13:36:04Z")

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Hello, I am trying to render 58M cylinders, but it seems to have an access error during the vtkrenderwindow-\>render procedure. It produces the window and begins to render and at some point has a memory access error. Aft…

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## [Cannot pick vtkActor inside vtkOrientationMarkerWidget.](https://discourse.vtk.org/t/cannot-pick-vtkactor-inside-vtkorientationmarkerwidget/14386)

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**Author:** [@tomdong](https://discourse.vtk.org/u/tomdong)\
**Replies:** 2\
**Last updated:** [August 10, 2024, 5:08pm UTC](https://discourse.vtk.org/t/cannot-pick-vtkactor-inside-vtkorientationmarkerwidget/14386 "2024-08-10T17:08:14Z")

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Hi friends, I’m using vtk9.3 to build a 3D render app. I want to create a ‘viewcube’ with vtkOrientationMarkerWidget, here is what I’ve done: create 6 face actors; create a vtkAssembly and add face actors as parts; se…

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## [Simplified python wheel for VTK](https://discourse.vtk.org/t/simplified-python-wheel-for-vtk/14329)

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**Author:** [@jaswantp](https://discourse.vtk.org/u/jaswantp)\
**Replies:** 11\
**Last updated:** [August 8, 2024, 2:09pm UTC](https://discourse.vtk.org/t/simplified-python-wheel-for-vtk/14329 "2024-08-08T14:09:47Z")

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The vtk wheel from pypi does not work on a machine that has a GPU without a display connected. A common problem is when people use trame with VTK/ParaView for remote rendering and run their server process in a cloud mach…

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## [What is the difference of pvpython and python console accessible from paraview?](https://discourse.vtk.org/t/what-is-the-difference-of-pvpython-and-python-console-accessible-from-paraview/14285)

<div class="topic-metadata">

**Author:** [@Northern\_Condor1](https://discourse.vtk.org/u/Northern_Condor1)\
**Replies:** 1\
**Last updated:** [August 8, 2024, 10:36am UTC](https://discourse.vtk.org/t/what-is-the-difference-of-pvpython-and-python-console-accessible-from-paraview/14285 "2024-08-08T10:36:57Z")

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Hello! Could you please clarify what is the difference of pvpython and python console accessible from paraview? Thanks!

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## [Got Exception when using BooleanOperation.](https://discourse.vtk.org/t/got-exception-when-using-booleanoperation/14331)

<div class="topic-metadata">

**Author:** [@LItterBoy-GB](https://discourse.vtk.org/u/LItterBoy-GB)\
**Replies:** 4\
**Last updated:** [August 6, 2024, 9:49am UTC](https://discourse.vtk.org/t/got-exception-when-using-booleanoperation/14331 "2024-08-06T09:49:09Z")

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I got the exception when run booleanFilter-\>GetOutput();. polydata2.stl (934 Bytes) polydata1.stl (1.3 MB) Exception caused at 0x000007FFEE806D84E (vtkFilters General 9.3. dll) (located in VtkExample. exe): 0xC000000 …

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## [Setup Mouse Controls- 2D Viewer window](https://discourse.vtk.org/t/setup-mouse-controls-2d-viewer-window/14353)

<div class="topic-metadata">

**Author:** [@christeen](https://discourse.vtk.org/u/christeen)\
**Replies:** 0\
**Last updated:** [August 5, 2024, 7:27am UTC](https://discourse.vtk.org/t/setup-mouse-controls-2d-viewer-window/14353 "2024-08-05T07:27:19Z")

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In my application, I just want to introduce the 5 button mouse for the interaction. I searched the respective class to setup interaction with respective to the 5 button mouse. I don’t know setup all these for resliceima…

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## [Lots of failing tests on arm64 Macs due to Clang default of \`-ffp-contract=on\`](https://discourse.vtk.org/t/lots-of-failing-tests-on-arm64-macs-due-to-clang-default-of-ffp-contract-on/13779)

<div class="topic-metadata">

**Author:** [@seanm](https://discourse.vtk.org/u/seanm)\
**Replies:** 1\
**Last updated:** [August 2, 2024, 9:23pm UTC](https://discourse.vtk.org/t/lots-of-failing-tests-on-arm64-macs-due-to-clang-default-of-ffp-contract-on/13779 "2024-08-02T21:23:17Z")

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Hi all, Building VTK master on my Intel Mac results in only 1 test failure. But on arm64 Macs, there are about 15. You can see details here: https://open.cdash.org/viewTest.php?onlyfailed&buildid=9564918 I debugged …

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## [Stereo mode in VTK, effect is abnormal](https://discourse.vtk.org/t/stereo-mode-in-vtk-effect-is-abnormal/14310)

<div class="topic-metadata">

**Author:** [@hakukou](https://discourse.vtk.org/u/hakukou)\
**Replies:** 4\
**Last updated:** [August 2, 2024, 6:10pm UTC](https://discourse.vtk.org/t/stereo-mode-in-vtk-effect-is-abnormal/14310 "2024-08-02T18:10:59Z")

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Hello, when I was developing the program of the stereo naked-eye 3D screen, I found that when using vtkOpenGLGPUVolumeRayCastMapper for voxel rendering, the voxel rendering effect was incorrect. There were some distorted…

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