Example usage for java.lang Math abs

List of usage examples for java.lang Math abs

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Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public static double abs(double a)

Source Link

Document

Returns the absolute value of a double value.

Usage

From source file:Main.java

/** Calculates the contrast between the given color and white, using the algorithm provided by
 * the WCAG v2 in http://www.w3.org/TR/WCAG20/#contrast-ratiodef.
 *///w  w  w .  j av  a  2 s.  co m
private static float getContrastForColor(int color) {
    float bgR = Color.red(color) / 255f;
    float bgG = Color.green(color) / 255f;
    float bgB = Color.blue(color) / 255f;
    bgR = (bgR < 0.03928f) ? bgR / 12.92f : (float) Math.pow((bgR + 0.055f) / 1.055f, 2.4f);
    bgG = (bgG < 0.03928f) ? bgG / 12.92f : (float) Math.pow((bgG + 0.055f) / 1.055f, 2.4f);
    bgB = (bgB < 0.03928f) ? bgB / 12.92f : (float) Math.pow((bgB + 0.055f) / 1.055f, 2.4f);
    float bgL = 0.2126f * bgR + 0.7152f * bgG + 0.0722f * bgB;
    return Math.abs((1.05f) / (bgL + 0.05f));
}

From source file:com.castlabs.dash.helpers.ManifestHelper.java

public static String convertFramerate(double vrate) {
    Fraction f1 = Fraction.getFraction((int) (vrate * 1001), 1001);
    Fraction f2 = Fraction.getFraction((int) (vrate * 1000), 1000);
    double d1 = Math.abs(f1.doubleValue() - vrate);
    double d2 = Math.abs(f2.doubleValue() - vrate);
    if (d1 < d2) {
        return f1.getNumerator() + "/" + f1.getDenominator();
    } else {/*from  ww  w  . ja  va  2 s. c om*/
        return f2.getNumerator() + "/" + f2.getDenominator();
    }

}

From source file:edu.umn.msi.tropix.proteomics.itraqquantitation.impl.RMethods.java

/**
 * From the following R code.// w  w  w.j a v a  2s .co  m
 * 
 * <pre>
 * getPvalue &lt;- function(x){
 *  x_bar &lt;- mean(x)
 *  x_std &lt;- sd(x)
 *  z &lt;- x_bar/x_std
 *  pvalue &lt;- pnorm(-abs(z)) * 2
 *  return(pvalue)
 * }
 * </pre>
 * 
 * @param x
 * @return
 */
public static double getPValue(final double[] x) {
    final double xBar = StatUtils.mean(x);
    final double xStd = RUtils.sd(x);
    final double z = xBar / xStd;
    return RUtils.pnorm(-1 * Math.abs(z)) * 2;
}

From source file:Data.Utilities.java

public static Integer timeDiff(GPSRec rec1, GPSRec rec2) {

    Double t1 = (double) rec1.getTimestamp().getTime();
    Double t2 = (double) rec2.getTimestamp().getTime();

    Double timeDiff = Math.abs(t2 - t1);
    //        Double timeDiff = Math.abs(Double.longBitsToDouble(
    //                 - rec2.getTimestamp().getTime()));
    return (timeDiff.intValue());
}

From source file:Main.java

public static BufferedImage create(BufferedImage image, double angle, GraphicsConfiguration gc) {
    double sin = Math.abs(Math.sin(angle)), cos = Math.abs(Math.cos(angle));
    int w = image.getWidth(), h = image.getHeight();
    int neww = (int) Math.floor(w * cos + h * sin), newh = (int) Math.floor(h * cos + w * sin);
    int transparency = image.getColorModel().getTransparency();
    BufferedImage result = gc.createCompatibleImage(neww, newh, transparency);
    Graphics2D g = result.createGraphics();
    g.translate((neww - w) / 2, (newh - h) / 2);
    g.rotate(angle, w / 2, h / 2);/*from  w  ww.jav  a2s  . co m*/
    g.drawRenderedImage(image, null);
    return result;
}

From source file:Main.java

/**
 * Determines if the specified coordinate is in the target touch zone for a
 * horizontal bar handle./* w  w  w.  jav  a  2  s.  c o m*/
 * 
 * @param x the x-coordinate of the touch point
 * @param y the y-coordinate of the touch point
 * @param handleXStart the left x-coordinate of the horizontal bar handle
 * @param handleXEnd the right x-coordinate of the horizontal bar handle
 * @param handleY the y-coordinate of the horizontal bar handle
 * @param targetRadius the target radius in pixels
 * @return true if the touch point is in the target touch zone; false
 *         otherwise
 */
private static boolean isInHorizontalTargetZone(float x, float y, float handleXStart, float handleXEnd,
        float handleY, float targetRadius) {

    if (x > handleXStart && x < handleXEnd && Math.abs(y - handleY) <= targetRadius) {
        return true;
    }
    return false;
}

From source file:Main.java

public static double getJulDate() {
    Calendar cal = Calendar.getInstance();
    int year = cal.get(Calendar.YEAR);
    int month = cal.get(Calendar.MONTH) + 1;
    int day = cal.get(Calendar.DAY_OF_MONTH);
    int hour = cal.get(Calendar.HOUR_OF_DAY);
    int minute = cal.get(Calendar.MINUTE);
    int second = cal.get(Calendar.SECOND);
    double extra = (100.0 * year) + month - 190002.5;
    double julianDay = (367.0 * year) - (Math.floor(7.0 * (year + Math.floor((month + 9.0) / 12.0)) / 4.0))
            + Math.floor((275.0 * month) / 9.0) + day + ((hour + ((minute + (second / 60.0)) / 60.0)) / 24.0)
            + 1721013.5 - ((0.5 * extra) / Math.abs(extra)) + 0.5;
    DecimalFormat sixDigitFormat = new DecimalFormat("#.######");
    return Double.valueOf(sixDigitFormat.format(julianDay));
}

From source file:Main.java

public static float getCenteredAxis(MotionEvent event, InputDevice device, int axis, int historyPos) {
    if (device == null) {
        return 0;
    }//  ww  w .  jav  a 2  s  .  c o  m
    final InputDevice.MotionRange range = device.getMotionRange(axis, event.getSource());
    if (range != null) {
        final float flat = range.getFlat();
        final float value = historyPos < 0 ? event.getAxisValue(axis)
                : event.getHistoricalAxisValue(axis, historyPos);

        // Ignore axis values that are within the 'flat' region of the
        // joystick axis center.
        // A joystick at rest does not always report an absolute position of
        // (0,0).
        if (Math.abs(value) > flat) {
            return value;
        }
    }
    return 0;
}

From source file:Main.java

public static short[] createSequence(short begin, short end) {
    int sign = end > begin ? 1 : -1;
    int len = Math.abs(end - begin) + 1;
    short[] seq = new short[len];
    for (int i = 0; i < len; i++) {
        seq[i] = (short) (begin + i * sign);
    }//from   ww w .  j  ava2s.c o m
    return seq;
}

From source file:Main.java

public static Camera.Size getOptimalPreviewSize(int displayOrientation, int width, int height,
        Camera.Parameters parameters) {/*  w  ww  .j  a  v a2  s.  c om*/
    double targetRatio = (double) width / height;
    List<Camera.Size> sizes = parameters.getSupportedPreviewSizes();
    Camera.Size optimalSize = null;
    double minDiff = Double.MAX_VALUE;
    int targetHeight = height;

    if (displayOrientation == 90 || displayOrientation == 270) {
        targetRatio = (double) height / width;
    }

    // Try to find an size match aspect ratio and size

    for (Size size : sizes) {
        double ratio = (double) size.width / size.height;

        if (Math.abs(ratio - targetRatio) <= ASPECT_TOLERANCE) {
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
    }

    // Cannot find the one match the aspect ratio, ignore
    // the requirement

    if (optimalSize == null) {
        minDiff = Double.MAX_VALUE;

        for (Size size : sizes) {
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
    }

    return (optimalSize);
}