Complex Two-Directional arrays in Revit

At last year's Revit Technology Conference (RTC) I demonstrated how to create complex two directional array's.  The examples I showed were ultimately used for coloured fins on a building facade, but they could be used for anything that you want in Revit.  Here are some examples of the array's as work in progress on the way to the coloured fins shown in the youtube videos earlier.

Nested, nested, nested component arrays

This pattern was created starting from a single component that can be either round or square, with a choice of colours.  The component was then nested into another component and arrayed in one direction; then nested again and arrayed in the other direction.  In between were a few more nestings to enable alternating patterns.  All this was controlled by parametrics to choose colours, shapes and pattern repetition in each direction.  From the same component it was possible to generate quite different result as seen below:

Regular tartan grid pattern                                  Irregular pattern

I will show a little more detail of how these were created in a subsequent post here.  Those of you who were lucky enough to attend RTC 2011 can download a detailed step-by-step guide of how to create them, even if you didn't attend the actual presentation.