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wolph / numpy-stl

Simple library to make working with STL files (and 3D objects in general) fast and easy.
http://numpy-stl.readthedocs.org/
BSD 3-Clause "New" or "Revised" License
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Delete specific triangles from the mesh #179

Closed uffacci closed 10 months ago

uffacci commented 2 years ago

Hi, I want to know if there is an easy way to delete specific triangles from a mesh from an STL file. I can delete the vertices of the triangles that I want to reject, but then I cannot visualize the new result ... any ideas? Thanks a lot

wolph commented 2 years ago

Since numpy arrays have a fixed size, the only way you can delete them is by creating a new array (or a view).

One option would be to create a view, simply put, you can slice a numpy array by passing a list of selected indices:

>>> import numpy
>>> a = numpy.arange(10, 19).reshape((3, 3))
>>> a
array([[10, 11, 12],
       [13, 14, 15],
       [16, 17, 18]])
>>> a[[1, 2]]
array([[13, 14, 15],
       [16, 17, 18]])

If you create a new Mesh object with the sliced data argument you can easily delete triangles like that.

stale[bot] commented 2 years ago

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