DIY Christmas gifts are meaningful, not to mention easier on a budget. Our DIY gift ideas range from easy to advanced, ...

With a little creativity, many common household items can be transformed into something else that's entirely different and ...

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.

The term "involute" refers to the shape of the teeth: the curves of the teeth are involutes of circles, which are curves that optimize gear performance. Figure 1.1.2: The three marked circles are key ...

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