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| Function | Square of the tangent function |
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| Syntax C/C++ | #include <VFmath.h>
int VF_tan2( fVector Y, fVector X, ui size );
int VFx_tan2( fVector Y, fVector X, ui size, float A, float B, float C ); |
| C++ VecObj | #include <OptiVec.h>
int vector<T>::tan2( const vector<T>& X );
int vector<T>::x_tan2( const vector<T>& X, const T& A, const T& B, const T& C ); |
| Pascal/Delphi | uses VFmath;
function VF_tan2( Y, X:fVector; size:UInt ): IntBool;
function VFx_tan2( Y, X:fVector; size:UInt; A, B, C:Single ): IntBool; |
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| Description | normal versions: Yi = tan2( Xi )
expanded versions: Yi = C * tan2( A*Xi+B )
Calculating the squared trigonometric functions directly is faster and sometimes more accurate than first calculating the trigonometric function itself and squaring it afterwards. |
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| Error handling | SING and OVERFLOW errors (for arguments close to p/2) lead to a default result of ±HUGE_VAL. Precision errors lead to a default result of 0.0. |
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| Return value | FALSE (0), if no error occurred, otherwise TRUE (non-zero). |
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