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D2< Piecewise< SBasis > > Geom::tan2 ( SBasis const &  angle,
double  tol,
unsigned  order 

tan2 is the pseudo-inverse of atan2. It takes an angle and returns a unit_vector that points in the direction of angle.

angle a piecewise function of angle wrt t.
tol the maximum error allowed.
order the maximum degree to use for approximation

Definition at line 199 of file sbasis-geometric.cpp.

    return tan2(Piecewise<SBasis>(angle), tol, order);

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