# ParticlePathFilter can only process vtkImageData？

**URL:** <https://discourse.vtk.org/t/particlepathfilter-can-only-process-vtkimagedata/10379>\
**Category:** Development\
**Created:** [January 4, 2023, 7:34am UTC](https://discourse.vtk.org/t/particlepathfilter-can-only-process-vtkimagedata/10379 "2023-01-04T07:34:32Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![lizemin2016](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lizemin2016/32/5266_2.png) [@lizemin2016](https://discourse.vtk.org/u/lizemin2016)\
**Post date:** [January 4, 2023, 7:34am UTC](https://discourse.vtk.org/t/particlepathfilter-can-only-process-vtkimagedata/10379/1 "2023-01-04T07:34:32Z")

</div>

I want to generate particle path from my custom polydata, But the processing object in example/test codes I can find are all vtkImageData，Is it not applicable for unstructure polydata? Are there any implementation examples？