Golden Rule 10 : Match Curves on Opposite Sides

Surfaces have two directions, U and V. Each direction can have different degree and spans. So there are two 'pairs' of edges:

Pairs of edges in the U and V directions

When creating curves for building new surfaces, if the parameterisation of the pairs are matched, then the surface can be built with a good flow of CVs.

Comparing matched and mismatched boundary curves

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