Chromodoris adds mesh utilities to grasshopper. It is available on food4rhino and the source code and example files are available on bitbucket. It is free for use under the GPL license.

The goal of this library is to provide efficient and simple functionality to extend the creation, usage and display of meshes.

The current primary function is a very fast, simple voxel sampler and isosurfacer.

There are multiple available, in-depth and powerful solutions for some of what is covered by this library. This is not intended as a replacement, but rather a simple, efficient, and functional alternative particularly for use in dealing with large quantities of data and geometry.

The majority of code in this library is optimized and multithreaded. For example; the voxel sampling algorithm uses a multi-threaded KD-Tree, and also switches compute modes based on historical performance (between sampling per-voxel, or inverse sampling from points).