Example usage for java.lang Math sin

Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public static double sin(double a)

Source Link

Document

Returns the trigonometric sine of an angle.

Usage

From source file:Main.java

private static void multTwiddleFactor(int index, float[] real, float[] img, int pos, int sum) {

    float cosArg = (float) Math.cos(-2.0f * Math.PI * pos / (float) sum);
    float sinArg = (float) Math.sin(-2.0f * Math.PI * pos / (float) sum);

    float r = real[index] * cosArg - img[index] * sinArg;
    float i = real[index] * sinArg + img[index] * cosArg;

    real[index] = r;//from www  .  j a  v a2  s  . c om
    img[index] = i;
}

From source file:Main.java

public static double[] bd_encrypt(double gg_lat, double gg_lon) {

    double x = gg_lon, y = gg_lat;
    double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
    double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
    double bd_lon = z * Math.cos(theta) + 0.0065;
    double bd_lat = z * Math.sin(theta) + 0.006;

    return new double[] { bd_lon, bd_lat };
}

From source file:Main.java

public static double[] getGaoDePos(double[] baiDu) {
    double X_PI = 3.14159265358979324 * 3000.0 / 180.0;
    double x = baiDu[0] - 0.0065, y = baiDu[1] - 0.006;
    double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * X_PI);
    double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * X_PI);
    double[] gaode = new double[2];
    gaode[0] = z * Math.cos(theta);
    gaode[1] = z * Math.sin(theta);
    return gaode;
}

From source file:Main.java

public static double transformLon(double x, double y) {
    double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
    ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
    ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
    ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;
    return ret;//  www. ja  va 2  s.  co m
}

From source file:Main.java

public static double[] bd_decrypt(double bd_lat, double bd_lon) {
    double x = bd_lon - 0.0065, y = bd_lat - 0.006;
    double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
    double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
    double gg_lon = z * Math.cos(theta);
    double gg_lat = z * Math.sin(theta);
    return new double[] { gg_lon, gg_lat };
}

From source file:Main.java

public static double transformLat(double x, double y) {
    double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
    ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
    ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
    ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
    return ret;//from   w  w w  .j  a v  a 2  s . co m
}

From source file:Main.java

public static double distFrom(double lat1, double lng1, double lat2, double lng2) {
    double earthRadius = 3958.75;
    double dLat = Math.toRadians(lat2 - lat1);
    double dLng = Math.toRadians(lng2 - lng1);
    double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(Math.toRadians(lat1))
            * Math.cos(Math.toRadians(lat2)) * Math.sin(dLng / 2) * Math.sin(dLng / 2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
    double dist = earthRadius * c;

    int meterConversion = 1609;

    return dist * meterConversion;
}

From source file:Main.java

public static double distance(double lat1, double lng1, double lat2, double lng2) {
    double earthRadius = 6371000; //meters
    double dLat = Math.toRadians(lat2 - lat1);
    double dLng = Math.toRadians(lng2 - lng1);
    double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(Math.toRadians(lat1))
            * Math.cos(Math.toRadians(lat2)) * Math.sin(dLng / 2) * Math.sin(dLng / 2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
    double distance = (double) (earthRadius * c);

    return distance;
}

From source file:Main.java

public static float getAngleToCoordinates(double _direction, float _startX, float _startY, char _type) {
    if (_type == 'x') {
        return _startX + (float) Math.cos((_direction * Math.PI) / 180);
    } else {//from  w ww  . j  av a 2s  .  c  o  m
        return _startY + (float) Math.sin((_direction * Math.PI) / 180);
    }
}

From source file:Main.java

public static double distFrom(double lat1, double lng1, double lat2, double lng2) {
    double earthRadius = 3958.75;
    double dLat = Math.toRadians(lat2 - lat1);
    double dLng = Math.toRadians(lng2 - lng1);
    double sindLat = Math.sin(dLat / 2);
    double sindLng = Math.sin(dLng / 2);
    double a = Math.pow(sindLat, 2)
            + Math.pow(sindLng, 2) * Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2));
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
    double dist = earthRadius * c;

    if (dist >= 1000) {
        int distInInt = (int) dist;
        dist = (int) distInInt;
    } else if (dist >= 100) {
        dist = (((int) (dist * 10)) / 10.0);
    } else {/*from www . ja v  a2 s.  c o  m*/
        dist = (((int) (dist * 100)) / 100.0);
    }
    return dist;
}