Point: Rotation

Functions
template<typename T>
void	geom::rotatePiOver2 (ads::FixedArray< 2, T > *p)
	Rotate the vector + pi / 2.
template<typename T>
void	geom::rotateMinusPiOver2 (ads::FixedArray< 2, T > &p)
	Rotate the vector - pi / 2.

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