easiest way: use a modeler that supports parametric controlled surfaces.

you could script it using vb,net

Feb 09 Generative Parametric Modelling for Rhino, Metropolitan Works, London, UK
Simply Rhino Limited and Dr. Eyal Nir announce ParaCloud™.

ParaCloud™ is a low-cost software solution converting your Excel spreadsheet into a powerful parametric modeler that drives CAD tools and extend its abilities. ParaCloud™ powers Rhino with generative design capabilities.

Start with Rhino surfaces or curves - ParaCloud™ provides parametric control to accurately and intuitively edit your design for fabrication, construction and performative studies.

ParaCloud™ provides behavior modeling based on the parametric point-clouds, an innovative parametric design approach. This novel approach unfolds the design complexity creating schematic design interfaces for generative design and fabrication.

ParaCloud™ powers Rhino with:

- Parametric Behavior Modeling
- Surfaces and Ribs unfolding
- Parametric Shells and Ribs structures
- Parametric Components Population
- Rhino Blocks Generative Population
- Simplified Numeric Control over Spatial Geometry

When: February 9th 2007, 10.00am until 12.30am

Where: Metropolitan Works
London Metropolitan University
41 Commercial Road London E1 1LA

Admission: Pre-registration to this presentation is essential. Contact Simply Rhino Limited to book your place by either emailing paracloud@simplyrhino.co.uk or calling 0208 498 9900.
There is no charge to attend this event.

i was gonna mention that but i didnt think it was available yet