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* Replace sincos() with vanilla sin() and cos()HEADmasterFranklin Wei2020-08-23
| | | | sincos() is a GNU extension and causes problems on macOS.
* Fix dumb.Franklin Wei2019-12-27
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* Add function to rotate a 2d vectorFranklin Wei2019-12-27
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* Import from fieldvizFranklin Wei2019-03-07