Package healpix.essentials
Class FastMath
- java.lang.Object
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- healpix.essentials.FastMath
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public final class FastMath extends java.lang.Object
FastMath class is a Java implementation of the SLEEF library. Some of the methods can be used as substitutions of the corresponding methods in Math class. They have slightly less accuracy, and some methods are faster compared to those methods in Math class. Please note that the methods in the standard Math class are JNI methods, and the SLEEF library is specialized for SIMD operations.
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Constructor Summary
Constructors Constructor Description FastMath()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static double
acos(double d)
This method calculates the arc cosine of x in radians.static double
asin(double d)
This method calculates the arc sine of x in radians.static double
atan(double s)
Returns the arc tangent of an angle.static double
atan2(double y, double x)
This method calculates the arc tangent of y/x in radians, using the signs of the two arguments to determine the quadrant of the result.static double
cos(double d)
Returns the trigonometric cosine of an angle.static double
sin(double d)
Returns the trigonometric sine of an angle.
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Method Detail
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atan2
public static final double atan2(double y, double x)
This method calculates the arc tangent of y/x in radians, using the signs of the two arguments to determine the quadrant of the result. The results may have maximum error of 2 ulps.
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asin
public static double asin(double d)
This method calculates the arc sine of x in radians. The return value is in the range [-pi/2, pi/2]. The results may have maximum error of 3 ulps.
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acos
public static double acos(double d)
This method calculates the arc cosine of x in radians. The return value is in the range [0, pi]. The results may have maximum error of 3 ulps.
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atan
public static final double atan(double s)
Returns the arc tangent of an angle. The results may have maximum error of 2 ulps.
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sin
public static final double sin(double d)
Returns the trigonometric sine of an angle. The results may have maximum error of 2 ulps.
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cos
public static final double cos(double d)
Returns the trigonometric cosine of an angle. The results may have maximum error of 2 ulps.
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