XMScalarASinEst

Estimates the arcsine of a floating-point number.

Syntax

float XMScalarASinEst(
         float Value
)  

Parameters

Value
Type: float 

float value between -1.0f and 1.0f.

Return value

Type: float 

Returns the inverse sine of Value.

Remarks

Est functions offer increased performance at the expense of reduced accuracy. Est functions are appropriate for non-critical calculations where accuracy can be sacrificed for speed. The exact amount of lost accuracy and speed increase are platform dependent.

This function uses a 3-degree minimax approximation.

Requirements

Header: Declared in directxmath.h.