# How to measure 3D rotation smoothness / speed of a vtk 9.3.0 image embedded in a qt 6 application

**URL:** https://discourse.vtk.org/t/how-to-measure-3d-rotation-smoothness-speed-of-a-vtk-9-3-0-image-embedded-in-a-qt-6-application/16372
**Category:** Development
**Tags:** code
**Created:** [April 6, 2026, 2:55pm UTC](https://discourse.vtk.org/t/how-to-measure-3d-rotation-smoothness-speed-of-a-vtk-9-3-0-image-embedded-in-a-qt-6-application/16372 "2026-04-06T14:55:00Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![ataban](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/a/c5a1d2/32.png) [@ataban](https://discourse.vtk.org/u/ataban)
#### Post date: [April 6, 2026, 2:55pm UTC](https://discourse.vtk.org/t/how-to-measure-3d-rotation-smoothness-speed-of-a-vtk-9-3-0-image-embedded-in-a-qt-6-application/16372/1 "2026-04-06T14:55:00Z")

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How to measure 3D rotation smoothness / speed of a vtk 9.3.0 image embedded in a qt 6 application with tools like FRAPS.

Currently tools like FRAPS and nvidea control panel are working only on laptops for fps display but they are not displaying / overlaying fps on windows 11 desktop servers.

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### Author: ![sankhesh](https://discourse.vtk.org/user_avatar/discourse.vtk.org/sankhesh/32/73_2.png) [@sankhesh](https://discourse.vtk.org/u/sankhesh)
#### Post date: [April 10, 2026, 1:55pm UTC](https://discourse.vtk.org/t/how-to-measure-3d-rotation-smoothness-speed-of-a-vtk-9-3-0-image-embedded-in-a-qt-6-application/16372/2 "2026-04-10T13:55:15Z")

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Refer to [https://examples.vtk.org/site/Cxx/Utilities/FrameRate/](https://examples.vtk.org/site/Cxx/Utilities/FrameRate/) for an example of how to query the interaction frame rate in a vtk application. To display the frame rate directly in the view, add a text actor to the viewport and update its input string within the frame rate callback.