How to extract points(edges) from a 3D surface model?

ParaView Support
1

Dear all,

I have hollow 3D objects and i need to to extract all the points(edges) from their surfuces in order to calculate the mean distance.

How can i extract all these points ?

Thanks a lot,
Chris

2

Hi @Chm

I’m not sure what you mean by “mean distance” but extracting points is very easy. With ParaView 5.11, you can use “ConvertToPointCloud” filter

Best,

3

Thanks a lot Mathieu,

and after that we select the option " Select Points Through", correct ?

4

You can use SelectPointsThrough directly if you want to use this feature, no need for the filter.

5

thanks a lot

6

Dear Team,

Is there any difference between Extract Edges filter and ConvertToPointCloud filter ?

Thanks again

7

These filters have nothing in common

8

and what is the use for each filter ?

9

The Extract Edges filter produces a wireframe version of the input dataset by extracting all the edges of the dataset’s cells as lines. This filter operates on any type of data set and produces polygonal output.

The ConvertToPointCloud convert any dataset to a vtkPolyData containing the points and point data of the input and generate either no cells, a single polyvertex cell or many vertex cells. It is more efficient with pointset input.

Found in Help → Reader, Filters and Writer reference.

10

Thanks Mathieu for the detailed description