Summary: Demonstrates how to make a command that splits a bunch of BReps with a plane.

This is a VB.NET 2005 project containing plugin source code for Rhino4. It is a complete command class with comments.

This command works as follows:

1. It asks the user to select a set of (poly)surfaces
2. It asks the user for 3 points that specify a plane
3. It calculates cutting plane surfaces through each BRep
4. It splits the BRep with the plane. If the split was successful, the old objects are deleted and the new ones are inserted.

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