Autodesk Inventor surfacing. An introduction to G0 Surface continuity

Thanks very much to David Harrington, John Evans and the team at AUGIworld for allowing me to re-publish this article. To read it in full, check out the May 2014 Issue of AUGIworld.

Hard Surface modelling is possibly the most challenging discipline within 3D CAD  – and the most rewarding, once you’ve got the way of it…

With a bit of surfacing theory you too can relish meeting the challenge with Autodesk Inventor!

In this series of posts we are discussing how surface continuity is defined. If you’re not familiar with surface continuity, read this introduction.

G0 = Continuity

Light Cycles (old school)Image from Tron Wikia

‘G0’ then is the first order of surface continuity, and it simply means that the two surfaces touch. They meet along a common edge forming a ‘water tight’ boundary. This boundary can be pretty sharp (if you like).


Like the bikes in Tron (The original Tron. Again, feeling my age)  the two surfaces meet and change direction very sharply forming a very distinct edge.

G0Fact: Did you know that the CGI sequences on the original Tron movie were rendered on a computer that only has 2MB ram and 330MB storage? The scenes were rendered one pixel height line across the image at a time – no one saw the final images until they were re-composited back onto film!

Next up read all about G1 surface continuity

or read this article in full in the May 2014 Issue of AUGIworld.

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