Example usage for java.lang Math pow

Introduction

In this page you can find the example usage for java.lang Math pow.

Prototype

@HotSpotIntrinsicCandidate
public static double pow(double a, double b)

Source Link

Document

Returns the value of the first argument raised to the power of the second argument.

Usage

From source file:Main.java

public static double getLat(int inY, int zoom) {
    double y = Math.floor(inY * 256);
    double efactor = Math.exp((0.5 - y / 256 / Math.pow(2, zoom)) * 4 * Math.PI);
    double latitude = Math.asin((efactor - 1) / (efactor + 1)) * 180 / Math.PI;
    if (latitude < -90.0) {
        latitude = -90.0;//from w  w  w .  j  a  v  a  2 s.  c om
    } else if (latitude > 90.0) {
        latitude = 90.0;
    }
    return latitude;
}

From source file:Main.java

private static byte bits2byteReverse(String bString) {
    byte result = 0;
    for (int i = 0, j = 0; i < 8; i++, j++) {
        result += (Byte.parseByte(bString.charAt(i) + "") * Math.pow(2, j));
    }//from  ww w .j  av  a 2 s. co m
    return result;
}

From source file:Main.java

private static double convertColorPart(double colorPart) {
    colorPart /= 255.0;/*from   w w w  . jav a  2 s  . c  o  m*/
    if (colorPart <= 0.03928) {
        return colorPart / 12.92;
    } else {
        return Math.pow(((colorPart + 0.055) / 1.055), 2.4);
    }
}

From source file:Main.java

public static double calculateIndoorDistance(double level, double freq) {
    double exp = (27.55d - 40d * Math.log10(freq) + 6.7d - level) / 20.0d;
    return Math.pow(10.0d, exp);
}

From source file:Main.java

public static float getEuclideanDistance(float[] arr1, float[] arr2) {
    float minSum = 0;
    for (int i = 0; i < arr1.length; i++) {
        minSum += Math.pow(arr1[i] - arr2[i], 2);
    }//from   w w  w.  j a  v  a  2  s . c om
    return minSum;
}

From source file:Main.java

private static byte bits2byte(String bString) {
    byte result = 0;
    for (int i = bString.length() - 1, j = 0; i >= 0; i--, j++) {
        result += (Byte.parseByte(bString.charAt(i) + "") * Math.pow(2, j));
    }// w  ww .  j a  v a  2s  .  c  om
    return result;
}

From source file:Main.java

public static double magic_func(double t) {
    double bound = 0.04045;
    double a = 0.055;
    double gamma = 2.4;
    double denom = 12.92;

    if (t > bound) {
        return Math.pow((t + a) / (1 + a), gamma);
    } else {//  w w w . j  a  va2s.com
        return t / denom;
    }
}

From source file:Main.java

public static long productOfDigit(int[] digits) {
    long result = 1;
    for (int i = 9; i >= 0; i--) {
        if (digits[i] != 0) {
            result *= Math.pow(i, digits[i]);
        }/*from   www.  ja  v  a2  s .com*/
    }
    return result;
}

From source file:Main.java

/**
 * Check if one double value equals to zero
 * @param obj//from   www  .j av a 2 s  . c o  m
 * @param precision
 * @return
 */
public static boolean equalsToZero(double obj, int precision) {
    return Math.abs(obj) <= Math.pow(0.1, precision);
}

From source file:Main.java

public static int ByteIntValue(byte b) {
    int toReturn = 0;
    for (int i = 0; i < 8; i++) {
        if (GetBit(b, 0)) {
            toReturn += Math.pow(2, i);
        }//from  w  w  w. j av a2 s  . c o  m
    }
    return toReturn;
}