Two surfaces that don't touch at all have no continuity. The memorable scene is when Herbie breaks in half during a race, and ends up winning first and third place! One personal favourite were the “Herbie” films, in which a plucky VW Beetle comes to life with hilarious results. I always fondly remember being taken to our local library as a kid to see the movies on a big screen (this was before cable TV and the Internet, and describing it makes me feel old!) The more alike the surfaces (the more conditions that match across the pair of inputs) the more smoothly the adjoining surfaces flow. We can add a suffix to our G to describe how many like characteristics each surface has. We describe the 'smoothness' of a junction, where one surface meets another, using the term 'G' (G stands for 'Geometry'). Usually surface modelling is used to create flowing, organic shapes, so the junctions between surfaces are terribly important. Surface modelling is the art of building complex geometrical features, one surface at a time. With a bit of surfacing theory, you too can relish meeting the challenge with Autodesk Inventor®! Hard Surface modelling is possibly the most challenging discipline within 3D CAD, and the most rewarding, once you've gotten the way of it. Back June 30th, 2014 An Introduction to Surface Continuity
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