In the latest release of Grasshopper, David Rutten has incorporated many of his Pointset Reconstrution tools for Rhino. There are, for example, components for voronoi, delaunay, quadtree and convexhull funtions. To have them right there in grasshopper lets you skip the step of calling them from rhino or a script. Great!
To try these new components out, I’ve put together a quick voronoi definition which inputs a surface and an attractor point which influences the sizes of the voronoi cells. The closer to the point, the smaller and tighter the cells.
// download definition file: voronoi-attractor.ghx