VF_atan VD_atan VE_atan
 VCF_atan VCD_atan VCE_atan
 VFx_atan VDx_atan VEx_atan
 VCFx_atan VCDx_atan VCEx_atan
 Function arcus tangens function
 Syntax C/C++ #include int VF_atan( fVector Y, fVector X, ui size ); int VFx_atan( fVector Y, fVector X, ui size, float A, float B, float C ); C++ VecObj #include int vector::atan( const vector& X ); int vector::x_atan( const vector& X, const T& A, const T& B, const T& C ); Pascal/Delphi uses VFmath; function VF_atan( Y, X:fVector; size:UIntSize ): IntBool; function VFx_atan( Y, X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
 CUDA function C/C++ #include int cudaVF_atan( fVector d_Y, fVector d_X, ui size ); int cudaVFx_atan( fVector d_Y, fVector d_X, ui size, float A, float B, float C ); int cusdVFx_atan( fVector d_Y, fVector d_X, ui size, float *d_A, float *d_B, float *d_C ); int VFcu_atan( fVector h_Y, fVector h_X, ui size ); int VFxcu_atan( fVector h_Y, fVector h_X, ui size, float A, float B, float C ); CUDA function Pascal/Delphi uses VFmath; function cudaVF_atan( d_Y, d_X:fVector; size:UIntSize ): IntBool; function cudaVFx_atan( d_Y, d_X:fVector; size:UIntSize; A, B, C:Single ): IntBool; function cusdVFx_atan( d_Y, d_X:fVector; size:UIntSize; d_A, d_B, d_C:PSingle ): IntBool; function VFcu_atan( h_Y, h_X:fVector; size:UIntSize ): IntBool; function VFxcu_atan( h_Y, h_X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
 Description normal versions: Yi = arctan ( Xi ) expanded versions: Yi = C * arctan (A*Xi + B )
 Error handling The real versions should be error-proof as long as the parameter C in the expanded versions is not already near the OVERFLOW limit; this very rare error is neither detected nor handled. In the complex versions, the result for an argument of {0, −1} is set to {0, -p} without notice (and without the program crash resulting in Borland C++ from calling the complex atan with this argument).
 Return value always FALSE (0).