ClosedShell3D offset - Githubissues

Dessia-tech / volmdlr

A python VOLume MoDeLeR computations-oriented with STEP support for import/export

GNU Lesser General Public License v2.1

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ClosedShell3D offset #167

Open MackJoly opened 3 years ago

MackJoly commented 3 years ago

I'm submitting a ...
- [ ] bug report
- [X] feature request
What is the motivation / use case for changing the behavior? I would like a homothetie method for ClosedShell3D in order to change the size of a ClosedShell3D and to substract to another. What do you think about that ?

masfaraud commented 3 years ago

Why not using a frame mapping with the homothetic ratio in as length of the u, v, w vector?

MackJoly commented 3 years ago

A first possibility is available thanks to PointCloud3D by offsetting each polygon2D and translating planes position to place polygon2D in 3D

masfaraud commented 3 years ago

This is a difficult feature...

masfaraud commented 2 years ago

Is there still a need for this?

MackJoly commented 2 years ago

Yes it could be nice ! Today I use an annexe method First of all I simplified my CAD thanks to PointCloud3D.to_shell with the parameter offset The method consists in offsetting each polygon from the simplification and displace them in normal direction in order to approximate an offset but it is not really precise

masfaraud commented 1 year ago

For Stl shells http://www.open3d.org/docs/0.12.0/tutorial/geometry/mesh.html