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<h2 title="Class FastMath" class="title">Class FastMath</h2>
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<pre>public final class <span class="typeNameLabel">FastMath</span>
extends <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">FastMath class is a Java implementation of the
<a href="http://freecode.com/projects/sleef">SLEEF</a>
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.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#FastMath--">FastMath</a></span>()</code> </td>
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<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#acos-double-">acos</a></span>(double d)</code>
<div class="block">This method calculates the arc cosine of x in radians.</div>
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<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#asin-double-">asin</a></span>(double d)</code>
<div class="block">This method calculates the arc sine of x in radians.</div>
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<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#atan-double-">atan</a></span>(double s)</code>
<div class="block">Returns the arc tangent of an angle.</div>
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<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#atan2-double-double-">atan2</a></span>(double y,
double x)</code>
<div class="block">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.</div>
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<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#cos-double-">cos</a></span>(double d)</code>
<div class="block">Returns the trigonometric cosine of an angle.</div>
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<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/FastMath.html#sin-double-">sin</a></span>(double d)</code>
<div class="block">Returns the trigonometric sine of an angle.</div>
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<pre>public FastMath()</pre>
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<pre>public static final double atan2(double y,
double x)</pre>
<div class="block">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.</div>
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<pre>public static double asin(double d)</pre>
<div class="block">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.</div>
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<pre>public static double acos(double d)</pre>
<div class="block">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.</div>
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<pre>public static final double atan(double s)</pre>
<div class="block">Returns the arc tangent of an angle. The results may have
maximum error of 2 ulps.</div>
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<pre>public static final double sin(double d)</pre>
<div class="block">Returns the trigonometric sine of an angle. The results may
have maximum error of 2 ulps.</div>
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<pre>public static final double cos(double d)</pre>
<div class="block">Returns the trigonometric cosine of an angle. The results may
have maximum error of 2 ulps.</div>
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