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 byte[] resize(byte[] picArray, int size, boolean faceDetect) {
    if (picArray == null) {
        return null;
    }/* w ww.  ja v a2 s  .co  m*/
    Bitmap pic = BitmapFactory.decodeByteArray(picArray, 0, picArray.length);
    if (pic == null) {
        return null;
    }

    size = Math.min(size, Math.min(pic.getHeight(), pic.getWidth()));
    if (size % 2 != 0)
        size--;
    Log.i("sizes", "old width:" + pic.getWidth() + " old height:" + pic.getHeight() + " new size:" + size);
    Bitmap scaledPic = scale(pic, size);

    int width = scaledPic.getWidth();
    int height = scaledPic.getHeight();

    //if pic is already square, we are done now
    if (width == height) {
        return bitmapToBytes(scaledPic);
    }

    PointF mid = null;
    int cropcenter;

    if (faceDetect)
        mid = findFaceMid(scaledPic);

    Bitmap out;
    if (width > height) {
        if (mid != null)
            cropcenter = Math.max(size / 2, Math.min((int) Math.floor(mid.y), width - size / 2));
        else
            cropcenter = width / 2;
        Log.i("CROPPING", "width:" + width + " center:" + cropcenter + " size:" + size + " left edge:"
                + (cropcenter - size / 2) + " right edge:" + (cropcenter + size / 2));
        out = Bitmap.createBitmap(scaledPic, cropcenter - size / 2, 0, size, size);
    } else {
        if (mid != null)
            cropcenter = Math.max(size / 2, Math.min((int) Math.floor(mid.x), height - size / 2));
        else
            cropcenter = height / 2;
        out = Bitmap.createBitmap(scaledPic, 0, 0, size, size);
    }

    return bitmapToBytes(out);
}

---

From source file:main.java.utils.Utility.java

public static int getBase(int x) {
    int value = Math.abs(x);

    if (value == 0)
        return 1;
    else/*from   w  ww.  j  av a2s. c o  m*/
        return (int) (1 + Math.floor((Math.log(value) / Math.log(10.0d))));
}

---

From source file:Main.java

/**
 * Returns the closest power-of-two number less than or equal to x.
 *
 * @param x input value// w ww  .j av  a2  s  . c o m
 *
 * @return the closest power-of-two number less then or equal to x
 */
public static long prevPow2(long x) {
    if (x < 1) {
        throw new IllegalArgumentException("x must be greater or equal 1");
    }
    return (long) Math.pow(2, Math.floor(Math.log(x) / Math.log(2)));
}

---

From source file:com.android.camera2.its.ItsUtils.java

public static MeteringRectangle[] getJsonWeightedRectsFromArray(JSONArray a, boolean normalized, int width,
        int height) throws ItsException {
    try {//from   w  w w.  j  a  va2s.  c om
        // Returns [x0,y0,x1,y1,wgt,  x0,y0,x1,y1,wgt,  x0,y0,x1,y1,wgt,  ...]
        assert (a.length() % 5 == 0);
        MeteringRectangle[] ma = new MeteringRectangle[a.length() / 5];
        for (int i = 0; i < a.length(); i += 5) {
            int x, y, w, h;
            if (normalized) {
                x = (int) Math.floor(a.getDouble(i + 0) * width + 0.5f);
                y = (int) Math.floor(a.getDouble(i + 1) * height + 0.5f);
                w = (int) Math.floor(a.getDouble(i + 2) * width + 0.5f);
                h = (int) Math.floor(a.getDouble(i + 3) * height + 0.5f);
            } else {
                x = a.getInt(i + 0);
                y = a.getInt(i + 1);
                w = a.getInt(i + 2);
                h = a.getInt(i + 3);
            }
            x = Math.max(x, 0);
            y = Math.max(y, 0);
            w = Math.min(w, width - x);
            h = Math.min(h, height - y);
            int wgt = a.getInt(i + 4);
            ma[i / 5] = new MeteringRectangle(x, y, w, h, wgt);
        }
        return ma;
    } catch (org.json.JSONException e) {
        throw new ItsException("JSON error: ", e);
    }
}

---

From source file:com.jennifer.ui.util.MathUtil.java

private static double niceNum(double range, boolean round) {
    double exponent = Math.floor(Math.log10(range));
    double fraction = range / Math.pow(10, exponent);
    double nickFraction;

    if (round) {/*from   ww w.ja  va 2  s.  c  o m*/
        if (fraction < 1.5)
            nickFraction = 1;
        else if (fraction < 3)
            nickFraction = 2;
        else if (fraction < 7)
            nickFraction = 5;
        else
            nickFraction = 10;
    } else {
        if (fraction <= 1)
            nickFraction = 1;
        else if (fraction <= 2)
            nickFraction = 2;
        else if (fraction <= 5)
            nickFraction = 5;
        else
            nickFraction = 10;
    }

    return nickFraction * Math.pow(10, exponent);
}

---

From source file:Main.java

public Dimension getPreferredScrollableViewportSize() {
    if (getParent() == null)
        return getSize();
    Dimension d = getParent().getSize();
    int c = (int) Math.floor((d.width - getInsets().left - getInsets().right) / 50.0);
    if (c == 0)//ww  w .  j a  va  2  s.c  om
        return d;
    int r = 20 / c;
    if (r * c < 20)
        ++r;
    return new Dimension(c * 50, r * 50);
}

---

From source file:EncodeUtils.java

public static byte[] toBase64(byte[] in) {
    int inputLength = in.length;
    int outputLength = (int) Math.floor((4 * inputLength) / 3f) + 3;
    outputLength = outputLength + 2 * (int) Math.floor(outputLength / 76f);
    byte[] results = new byte[outputLength];
    int inputIndex = 0;
    int outputIndex = 0;
    while (inputLength - inputIndex > 2) {
        int one = (toInt(in[inputIndex++]) << 16);
        int two = (toInt(in[inputIndex++]) << 8);
        int three = toInt(in[inputIndex++]);
        int quantum = one | two | three;
        int index = (quantum & FIRST_MASK) >> 18;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        index = (quantum & SECOND_MASK) >> 12;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        index = (quantum & THIRD_MASK) >> 6;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        index = (quantum & FORTH_MASK);
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
    }//from   w w w . j a  v a  2 s . c  om

    switch (inputLength - inputIndex) {
    case 1:
        int quantum = in[inputIndex++] << 16;
        int index = (quantum & FIRST_MASK) >> 18;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        index = (quantum & SECOND_MASK) >> 12;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        outputIndex = setResult(results, outputIndex, (byte) '=');
        outputIndex = setResult(results, outputIndex, (byte) '=');
        break;

    case 2:
        quantum = (in[inputIndex++] << 16) + (in[inputIndex++] << 8);
        index = (quantum & FIRST_MASK) >> 18;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        index = (quantum & SECOND_MASK) >> 12;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        index = (quantum & THIRD_MASK) >> 6;
        outputIndex = setResult(results, outputIndex, ENCODING[index]);
        outputIndex = setResult(results, outputIndex, (byte) '=');
        break;
    }

    return results;
}

---

From source file:Round.java

static int round(double d) {
    if (d < 0) {
        throw new IllegalArgumentException("Value must be non-negative");
    }//from   w  w w .j ava 2  s .c  om
    int di = (int) Math.floor(d); // integral value below (or ==) d
    if ((d - di) > THRESHOLD) {
        return di + 1;
    } else {
        return di;
    }
}

---

From source file:com.algoTrader.util.RoundUtil.java

public static int getDigits(double n) {
    int exponent = -(int) Math.floor(Math.log10(n));
    int digits = exponent >= 0 ? exponent : 0;
    return digits;
}

---

From source file:uk.ac.kcl.it.MagicSquare.java

@PostConstruct
public void readFile() throws IOException {
    // If included in an Eclipse project.
    InputStream stream = ClassLoader.getSystemResourceAsStream("magic-square.csv");
    BufferedReader buffer = new BufferedReader(new InputStreamReader(stream));

    // If in the same directory - Probably in your case...
    // Just comment out the 2 lines above this and uncomment the line
    // that follows.
    //BufferedReader buffer = new BufferedReader(new FileReader(filename));

    String line;/*from  ww  w.j a  v  a2s .com*/
    int row = 0;

    while ((line = buffer.readLine()) != null) {
        String[] vals = line.trim().split("\\s+");

        // Lazy instantiation.
        if (matrix == null) {
            size = vals.length;
            matrix = new int[size][size];
            log10 = (int) Math.floor(Math.log10(size * size)) + 1;
            numberFormat = String.format("%%%dd", log10);
        }

        for (int col = 0; col < size; col++) {
            matrix[row][col] = Integer.parseInt(vals[col]);
        }

        row++;
    }
}

---

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