Highlighting the edges of an actor

Development
1

Hello,

I am trying to highlight the edges of an actor when I select it with the cursor. Is there a method that has this functionality?

I would greatly appreciate any help.
Thanks.

2

Check out this example:
https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/Silhouette/

3

Do you mean the edges of each triangle or the silhouette?

4

Here is an example from the VTKExamples Project that highlights a picked actor. The example subclasses vtkInteractorStyleTrackballCamera.

5

When I click on the actor, I want there to be an outline around the actor. So I guess the silhouette.

6

Will the silhouette move along with the actor that I am trying to outline if I apply transformations to the actor, or will I have to apply the same transformation to the silhouette?

Update: The silhouette does not move along with the actor. Do you know a function that simplifies the task, instead of copy the code for the transformation of the actor for the silhouette?

7

I’ve added an new example to the VTK Examples Project. HighlightWithSilhouette adds a silhouette to the picked actor. I think this is what you were looking for?
Here is a youtube video of the interaction.

Enjoy VTK,

Bill

2 Likes
8

Thank you so much! Is there a Python version of the source code by any chance?

9

Maybe @amaclean will make a python version.

10

Will do, I’ll let you when it’s done.

11

I think is a neat way to show the highlighted actor.

12

It’s impressive.

Andrew Maclean

13

All done. It should appear when the next sync is done for the VTKExamples web page. See /src/Python/Picking/HighlightWithSilhouette.py in the VTKExamples folder.

14

@amaclean I have synced the site. Nice work!

Old Guys Rule!

1 Like
15

@at123 The python version is available here

16

The link has changed
https://kitware.github.io/vtk-examples/site/Cxx/Picking/HighlightWithSilhouette/

17

Would there be anyway to have something like this in vtk.js as well?