# How can I show just border of Actor
**URL:** https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903
**Category:** Development
**Tags:** release-process, python, code, proposal
**Created:** [July 8, 2023, 1:33pm UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903 "2023-07-08T13:33:18Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@A.M\_Shahpouri](https://discourse.vtk.org/u/A.M_Shahpouri)
#### Post date: [July 8, 2023, 1:33pm UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/1 "2023-07-08T13:33:18Z")
Hi
I have a filled Actor
Now I want to view just Border of this actor
how can I do this?
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### Author:  [@madmoonman](https://discourse.vtk.org/u/madmoonman)
#### Post date: [July 9, 2023, 10:14am UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/2 "2023-07-09T10:14:21Z")
How about vtkFeatureEdges?
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### Author:  [@A.M\_Shahpouri](https://discourse.vtk.org/u/A.M_Shahpouri)
#### Post date: [July 9, 2023, 11:41am UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/3 "2023-07-09T11:41:37Z")
hi
thank you for your response
but I want to show border (or edge)
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### Author:  [@will.schroeder](https://discourse.vtk.org/u/will.schroeder)
#### Post date: [July 9, 2023, 11:56am UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/4 "2023-07-09T11:56:54Z")
Please provide more information, including a sketch or illustrative figure. The best way to get a response from very busy developers is to make it easier for them to answer.
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### Author:  [@A.M\_Shahpouri](https://discourse.vtk.org/u/A.M_Shahpouri)
#### Post date: [July 9, 2023, 12:38pm UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/5 "2023-07-09T12:38:11Z")
hi
ok
I have a shape like this photo
for showing this photo I have a vtkImagedata (in this code : ContourData) which the value of inside points have 255 and outsides are 0.
so I do in this way:
```auto
vtkNew ContoureResliceMappers;
ContoureResliceMappers->SetInputData(ContourData);
ContoureResliceMappers->SetSlicePlane(plane);
ContoureResliceMappers->Update();
vtkNew lookupTable;
lookupTable->SetNumberOfColors(2);
lookupTable->SetTableValue(0, 0, 0, 0, 0); //set 0 opacity for outside values
lookupTable->SetTableValue(1,0,1,0, 1); //set 1 opacity and green color for outside values
vtkNew ContoureSlices;
ContoureSlices->SetMapper(ContoureResliceMappers);
ContoureSlices->GetProperty()->SetLookupTable(lookupTable);
ContoureSlices->Update();
```
Now how can I show just Border(edge) of this shape
I mean this sides which is in between of reds lines in this photo:
thanks
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### Author:  [@will.schroeder](https://discourse.vtk.org/u/will.schroeder)
#### Post date: [July 10, 2023, 11:26am UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/6 "2023-07-10T11:26:48Z")
That’s better, thanks.
I’ll throw out some ideas, but I suspect that there are medical computing folks that might have better ideas.
You are basically trying to generate a contour line. So use vtkDiscreteFlyingEdges2D. If you want the entire segmented object, use vtkSurfaceNets2D.
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### Author:  [@A.M\_Shahpouri](https://discourse.vtk.org/u/A.M_Shahpouri)
#### Post date: [July 15, 2023, 8:28am UTC](https://discourse.vtk.org/t/how-can-i-show-just-border-of-actor/11903/7 "2023-07-15T08:28:26Z")
Thanks for your answer
but I think it’s can not be useful for my project.
because I want show also 3D , sagittal , coronal and oblique of that and by that way I can’t do that.
I also tried do that by vtkdelaunay3d but because I have a lot of points and this way take a lot of time .
so how can I do that ?