Append Geometry

[laserman781]

I would like to be able to append my meshes/combine them before I save them as a .vtk. I have multiple tubes and after I generate them I would prefer to have them all in one vtk file rather than having them all separate.

I have looked into the class pyvista.MultiBlock and append but I have not been able to apply it.

I have the tube data in a dictionary and I would have to loop through in order to add them as arguments combine them.

Thank you.

[banesullivan]

If you already have all of the meshes/tubes in a dictionary, then you should try using a MultiBlock dataset and its combine method to merge all of the meshes. Here's an example:

import pyvista as pv
my_tubes = {
    'tube a': pv.Cylinder(center=(1,1,1), direction=(1,0,0)),
    'tube b': pv.Cylinder(center=(0,1,1), direction=(1,1,0)),
    'tube c': pv.Cylinder(center=(1,1,0), direction=(0,0,1)),
}

blocks = pv.MultiBlock(my_tubes)
merged = blocks.combine()
merged # this is now a single unstructured grid containing all geometry

The last release of PyVista (version 0.21.4) also added a nifty new + operator for all mesh types that you could use, but I'd recommend the combine method since you already have a dictionary

[laserman781]

Worked great thanks!