Example usage for java.lang Math floor

Introduction

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

Prototype

public static double floor(double a)

Source Link

Document

Returns the largest (closest to positive infinity) double value that is less than or equal to the argument and is equal to a mathematical integer.

Usage

From source file:Main.java

public static Bitmap resize(Bitmap src, int w2, int h2) {
    int w1 = src.getWidth();
    int h1 = src.getHeight();
    int[] pxSource = new int[w1 * h1];
    int[] pxResult = new int[w2 * h2];

    src.getPixels(pxSource, 0, w1, 0, 0, w1, h1);
    double x_ratio = w1 / (double) w2;
    double y_ratio = h1 / (double) h2;
    double px, py;
    for (int i = 0; i < h2; i++) {
        for (int j = 0; j < w2; j++) {
            px = Math.floor(j * x_ratio);
            py = Math.floor(i * y_ratio);
            pxResult[(i * w2) + j] = pxSource[(int) ((py * w1) + px)];
        }/*from ww w. j a  va2s .  com*/
    }

    return Bitmap.createBitmap(pxResult, w2, h2, Config.ARGB_8888);
}

From source file:Main.java

public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {
        //https://github.com/square/picasso/blob/master/picasso/src/main/java/com/squareup/picasso/RequestHandler.java#L161
        if (reqHeight == 0) {
            inSampleSize = (int) Math.floor((float) width / (float) reqWidth);
        } else if (reqWidth == 0) {
            inSampleSize = (int) Math.floor((float) height / (float) reqHeight);
        } else {// www  . j ava  2  s. c om
            int heightRatio = (int) Math.floor((float) height / (float) reqHeight);
            int widthRatio = (int) Math.floor((float) width / (float) reqWidth);
            inSampleSize = Math.max(heightRatio, widthRatio);
        }
    }
    return inSampleSize;
}

From source file:Main.java

public static int[] getMapTileFromCoordinates(final double aLat, final double aLon, final int zoom) {
    final int[] out = new int[2];

    final double E2 = (double) aLat * Math.PI / 180;
    final long sradiusa = 6378137;
    final long sradiusb = 6356752;
    final double J2 = (double) Math.sqrt(sradiusa * sradiusa - sradiusb * sradiusb) / sradiusa;
    final double M2 = (double) Math.log((1 + Math.sin(E2)) / (1 - Math.sin(E2))) / 2
            - J2 * Math.log((1 + J2 * Math.sin(E2)) / (1 - J2 * Math.sin(E2))) / 2;
    final double B2 = (double) (1 << zoom);
    out[0] = (int) Math.floor(B2 / 2 - M2 * B2 / 2 / Math.PI);

    out[1] = (int) Math.floor((aLon + 180) / 360 * (1 << zoom));

    return out;//  ww w .ja  v a 2 s .  co m
}

From source file:Main.java

public static RectF round(final RectF rect) {
    rect.left = (float) Math.floor(rect.left);
    rect.top = (float) Math.floor(rect.top);
    rect.right = (float) Math.ceil(rect.right);
    rect.bottom = (float) Math.ceil(rect.bottom);
    return rect;/*from ww w. j a  v a  2  s . c  om*/
}

From source file:Main.java

public static double roundDistance(double val) {
    return (Math.floor(val * 10)) / 10;
}

From source file:Main.java

public static <T> T random(List<T> list) {
    return list.get((int) Math.floor(Math.random() * list.size()));
}

From source file:AIR.Common.Utilities.MathUtils.java

public static double truncate(double d) {
    if (d < 0)
        return -1 * Math.floor(d * -1);
    else//  ww w. j a v  a  2  s  .co  m
        return Math.floor(d);
}

From source file:Main.java

public static int getTileSize(double zoomLevel, int tileSize) {
    double f = zoomLevel - Math.floor(zoomLevel);
    f = f < .5f ? f + 1f : .5f * (f + 1f);
    return (int) (tileSize * f);
}

From source file:Main.java

/**
 * Convert the given Julian Day to Gregorian Date (in UT time zone).
 * Based on the formula given in the Explanitory Supplement to the
 * Astronomical Almanac, pg 604./* w ww .  j a v  a2 s .  com*/
 */
public static Date calculateGregorianDate(double jd) {
    int l = (int) jd + 68569;
    int n = (4 * l) / 146097;
    l = l - (146097 * n + 3) / 4;
    int i = (4000 * (l + 1)) / 1461001;
    l = l - (1461 * i) / 4 + 31;
    int j = (80 * l) / 2447;
    int d = l - (2447 * j) / 80;
    l = j / 11;
    int m = j + 2 - 12 * l;
    int y = 100 * (n - 49) + i + l;

    double fraction = jd - Math.floor(jd);
    double dHours = fraction * 24.0;
    int hours = (int) dHours;
    double dMinutes = (dHours - hours) * 60.0;
    int minutes = (int) dMinutes;
    int seconds = (int) ((dMinutes - minutes) * 60.0);

    Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UT"));
    cal.set(y, m - 1, d, hours + 12, minutes, seconds);
    return cal.getTime();
}

From source file:Main.java

/**
 * date into display date//  w  w w.  j a va 2s. com
 * 
 * @serverDateStr server date in string format
 * @return display time (Like 1 second ago, 2 months ago etc.)
 * */
public static String convertDateToDisplayFormat(Date serverDate) {

    // current date
    Date endDate = new Date();

    long different = endDate.getTime() - serverDate.getTime();
    long seconds = TimeUnit.MILLISECONDS.toSeconds(different);
    long minutes = TimeUnit.MILLISECONDS.toMinutes(different);
    long hrs = TimeUnit.MILLISECONDS.toHours(different);
    long days = TimeUnit.MILLISECONDS.toDays(different);

    int months = (int) Math.floor(days / 30);
    int years = (int) Math.floor(months / 12);

    if (years != 0) {
        if (years == 1) {
            return "1 year ago";
        } else {
            return years + " years ago";
        }
    } else if (months != 0) {
        if (months == 1) {
            return "1 month ago";
        } else {
            return months + " months ago";
        }
    } else if (days != 0) {
        if (days == 1) {
            return "Yesterday";
        } else {
            return days + " Days ago";
        }
    } else if (hrs != 0) {
        if (hrs == 1) {
            return hrs + " hour ago";
        } else {
            return hrs + " hours ago";
        }
    } else if (minutes != 0) {

        if (minutes == 1) {
            return minutes + " minute ago";
        } else {
            return minutes + " minutes ago";
        }
    } else {
        if (seconds == 0) {
            return "Now";
        } else if (seconds == 1) {
            return "1 sec ago";
        } else if (seconds > 0) {
            return seconds + " seconds ago";
        } else {
            return "Now";
        }
    }
}