Rotating a implicit function called vtkCylinder

Development
1

Hello everyone,
I am new to VTK and this forum. I just wanted to know if there is a solution to rotate an implicit function called vtkCylinder by 90 degrees. I would like to add the clip functionality in ModelClip extension and set it to the vtkCylinder implicit function. With vtkCylinderSource.h I have read that it is possible by translating the center and rotating by 90 degrees and translating back. Is there similar solution to achieve it?

2

You can transform nodes by applying a transformation node as shown here:

If you want to use this from a Python script then check out these examples: https://www.slicer.org/wiki/Documentation/Nightly/Modules/Transforms#Examples

3

Thank you for your reply! But what I am trying to rotate the implicit function with header name vtkCylinder.h by 90 degrees. I already have assigned the center and the radius of the cylinder but I am editing a loadable module. I would like to clip a stl data in two parts around the center with this cylinder function. But I would have to rotate the cylinder by 90 degrees to get the clipping functionality right.

4

You can change orientation of a vtkCylinder implicit function by calling its SetAxis method.

5

Hey Andras,
Thank you very much! I did as you suggested and now it works. I would like to ask one more thing. I have clipped the stl data successfully. But now I am trying to rotate those clipped parts(one of them would be fine). It’d be really nice if you could give me some suggestions regarding it.

6

You can apply transform to the segmentation node. If you want to rotate individual segments but not others, then you can:

  • move the segments to a new segmentation node
  • apply a transform to the new segmentation node
  • move the segments back to the original segmentation node
7

Thank you will try and let you know!

8

A post was merged into an existing topic: Cannot find rectangle segmentation option