Cork (plugin)
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Introduction
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Introduction 
This plugin can be used to perform Boolean operations on meshes (also called CSG = Constructive Solid Geometry).
It is based on the Cork library.
Since version 2.12, consider using the Mesh Boolean plugin, which is slower but supposedly more robust.
Procedure
Its usage is pretty straightforward:
- select two meshes (meshes should be ideally closed, otherwise the output might be wrong)
- click on the plugin icon (or the equivalent entry in the 'Plugins' menu: 'Plugins > Mesh Boolean Operations')
- when the plugin dialog appears (see above):
- assign each mesh to a role (A or B)
- then select the operation to apply:
- union: A + B
- difference (symmetric or not): A - B
- intersection: A n B
The plugin will create a new mesh corresponding to the operation output:
Warning: due to internal instabilities in the current version of the Cork library, it may be necessary to launch the process several times in order to get it working ;)