VF_atan2 VD_atan2 VE_atan2
 VFx_atan2 VDx_atan2 VEx_atan2
 Function arcus tangens function of quotients
 Syntax C/C++ #include int VF_atan2( fVector Z, fVector X, fVector Y, ui size ); int VFx_atan2( fVector Z, fVector X, fVector Y, ui size, float A, float B, float C ); C++ VecObj #include int vector::atan2( const vector& X, const vector& Y ); int vector::x_atan2( const vector& X, const vector& Y, const T& A, const T& B, const T& C ); Pascal/Delphi uses VFmath; function VF_atan2( Z, X, Y:fVector; size:UIntSize ): IntBool; function VFx_atan2( Z, X, Y:fVector; size:UIntSize; A, B, C:Single ): IntBool;
 CUDA function C/C++ #include int cudaVF_atan2( fVector d_Z, fVector d_X, fVector d_Y, ui size ); int cudaVFx_atan2( fVector d_Z, fVector d_X, fVector d_Y, ui size, float A, float B, float C ); int cusdVFx_atan2( fVector d_Z, fVector d_X, fVector d_Y, ui size, float *d_A, float *d_B, float *d_C ); int VFcu_atan2( fVector h_Z, fVector h_X, fVector h_Y, ui size ); int VFxcu_atan2( fVector h_Z, fVector h_X, fVector h_Y, ui size, float A, float B, float C ); CUDA function Pascal/Delphi uses VFmath; function cudaVF_atan2( d_Z, d_X, d_Y:fVector; size:UIntSize ): IntBool; function cudaVFx_atan2( d_Z, d_X, d_Y:fVector; size:UIntSize; A, B, C:Single ): IntBool; function cusdVFx_atan2( d_Z, d_X, d_Y:fVector; size:UIntSize; d_A, d_B, d_C:PSingle ): IntBool; function VFcu_atan2( h_Z, h_X, h_Y:fVector; size:UIntSize ): IntBool; function VFxcu_atan2( h_Z, h_X, h_Y:fVector; size:UIntSize; A, B, C:Single ): IntBool;
 Description normal versions: Zi = arctan( Yi / Xi ) expanded versions: Zi = C * arctan( Yi / (A*Xi+B) ) From Cartesian X -Y-coordinates, the angle of the corresponding polar coordinates is calculated. Note: in comparison to the ANSI C function atan2, the ordering of the parameters X and Y is reversed.
 Error handling If Xi and Yi are both zero, a DOMAIN error results with the default result NAN ("not-a-number"). In C/C++, this error is handled by _matherr and _matherrl with Xi and Yi as e->x and e->y.
 Return value FALSE (0), if no error occurred, otherwise TRUE (non-zero).