Wrapping awkwardly shaped Christmas presents is always a headache, but here's the formula for perfect gift wrap.

Again, the secret is how you’re wrapping all the way around the item. A diamond orientation means you’re folding over right triangles, with the longest side of each one, the hypotenuse, covering the ...

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This file provides functions and modules that construct shapes from a list of cross sections. In the case of skin() you specify each cross sectional shape yourself, and the number of points can vary.