Example usage for java.lang Math cos

Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public static double cos(double a) 

Source Link

Document

Returns the trigonometric cosine of an angle.

Usage

From source file:com.opengamma.analytics.math.TrigonometricFunctionUtils.java

public static ComplexNumber sin(final ComplexNumber z) {
    Validate.notNull(z, "z");
    final double x = z.getReal();
    final double y = z.getImaginary();
    return new ComplexNumber(Math.sin(x) * Math.cosh(y), Math.cos(x) * Math.sinh(y));
}

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From source file:Clock.java

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Color colorRetainer = g.getColor();

    g.setColor(getBackground());/*from  ww  w .j  ava2s.co  m*/
    g.fillRect(0, 0, getWidth(), getHeight());
    getBorder().paintBorder(this, g, 0, 0, getWidth(), getHeight());

    calendar.setTime(new Date()); // get current time
    int hrs = calendar.get(Calendar.HOUR_OF_DAY);
    int min = calendar.get(Calendar.MINUTE);

    g.setColor(getForeground());
    if (isDigital) {
        String time = "" + hrs + ":" + min;
        g.setFont(getFont());
        FontMetrics fm = g.getFontMetrics();
        int y = (getHeight() + fm.getAscent()) / 2;
        int x = (getWidth() - fm.stringWidth(time)) / 2;
        g.drawString(time, x, y);
    } else {
        int x = getWidth() / 2;
        int y = getHeight() / 2;
        int rh = getHeight() / 4;
        int rm = getHeight() / 3;

        double ah = ((double) hrs + min / 60.0) / 6.0 * Math.PI;
        double am = min / 30.0 * Math.PI;

        g.drawLine(x, y, (int) (x + rh * Math.sin(ah)), (int) (y - rh * Math.cos(ah)));
        g.drawLine(x, y, (int) (x + rm * Math.sin(am)), (int) (y - rm * Math.cos(am)));
    }

    g.setColor(colorRetainer);
}

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From source file:es.udc.gii.common.eaf.benchmark.multiobjective.wfg.Wfg_Objective.java

protected double mixed(double[] x, int A, double alpha) {
    double tmp = 2.0 * A * Math.PI;
    return correct_to_01(Math.pow(1.0 - x[0] - Math.cos(tmp * x[0] + Math.PI / 2.0) / tmp, alpha), EPSILON);
}

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From source file:utils.RandomVariable.java

/**
 * Generate a random number from a LogNormal random variable.
 *
 * @param mu mean of the Normal random variable.
 * @param sigma standard deviation of the Normal random variable.
 * @return a double.//from  w  w  w .  j  av a  2s . c  om
 */
public static double logNormal(double mu, double sigma) {
    double x = mu + sigma * Math.cos(2 * Math.PI * rand()) * Math.sqrt(-2 * Math.log(rand()));
    return x;
}

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From source file:net.ostis.scpdev.scg.geometry.GraphLayout.java

private void calculateForces() {
    int n = nodes.size();

    RealVector[] forces = new RealVector[n];
    for (int i = 0; i < n; ++i)
        forces[i] = new ArrayRealVector(new double[] { 0, 0 });

    Map<IFigure, Integer> obj_f = new HashMap<IFigure, Integer>();
    Point[] o_pos = new Point[n];

    ///*  w ww  .j a v a2  s  .  co m*/
    // Calculation repulsion forces.
    //
    for (int idx = 0; idx < n; ++idx) {
        obj_f.put(nodes.get(idx), idx);

        Point p1 = nodes.get(idx).getBounds().getLocation();

        RealVector p1v = new ArrayRealVector(2);
        p1v.setEntry(0, p1.x);
        p1v.setEntry(0, p1.y);

        double l = nullVector.getDistance(p1v);

        RealVector f = p1v.mapMultiply(gravity * (l - 3.0));

        forces[idx].subtract(f);

        for (int jdx = idx + 1; jdx < n; ++jdx) {
            Point p2 = nodes.get(idx).getBounds().getLocation();

            RealVector p2v = new ArrayRealVector(2);
            p2v.setEntry(0, p2.x);
            p2v.setEntry(0, p2.y);

            l = p1v.getDistance(p2v);

            if (l > max_rep_length)
                continue;

            if (l > 0.5) {
                f = p1v.subtract(p2v).mapMultiply(repulsion / l / l);
            } else {
                f = new ArrayRealVector(new double[] { Math.cos(0.17 * idx) * length * 7,
                        Math.sin(0.17 * (idx + 1)) * length * 7 });
            }

            forces[idx].add(f);
            forces[jdx].subtract(f);
        }
    }

    for (int idx = 0; idx < n; ++idx) {
        RealVector f = forces[idx];
        f.mapMultiply(stepSize);
        nodes.get(idx).setLocation(new Point(f.getEntry(0), f.getEntry(1)));
    }
}

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From source file:BackEnd.E_old_calculation.java

private FazorVektor calc_DE(double tau_real, double tau_image, DPoint Rp, DPoint R0, DPoint R0m, DPoint deltaL)
        throws DelaunayError {
    DPoint R_0 = new DPoint(R0.getX(), R0.getY(), R0.getZ());
    DPoint R_0m = new DPoint(R0m.getX(), R0m.getY(), R0m.getZ());
    R_0.setY(R0.getY() + R0_bundleY); //  bundle korektura pre jeden druhy SMER 
    R_0.setZ(R0.getZ() + Math.cos(beta) * R0_bundleZ); // priemety
    R_0.setX(R0.getX() + Math.sin(beta) * R0_bundleZ);

    R_0m.setY(R0m.getY() - R0_bundleY); //  bundle korektura pre jeden druhy SMER 
    R_0m.setZ(R0m.getZ() + Math.cos(beta) * R0_bundleZ); // priemety
    R_0m.setX(R0m.getX() + Math.sin(beta) * R0_bundleZ);

    //  System.out.println( "R_0= " + R_0 );
    //  System.out.println( "Rp= " + Rp );
    // System.out.println( "deltal= " + deltaL );
    double K = 1 / (4 * Math.PI * constants.getEpsi0() * constants.getEpsi1()); // kontanta

    DPoint R_r = help.substract(Rp, R_0); // rozdiel vektorov Rp a RO
    DPoint R_m = help.substract(Rp, R_0m); // rozdiel vektorov RP a RO mirror
    DPoint R_r_unit = new DPoint(R_r);
    DPoint R_m_unit = new DPoint(R_m);

    //        R_r_unit.setX(R_r_unit.getX()/get_ABS(R_r));
    //        R_r_unit.setY(R_r_unit.getY()/get_ABS(R_r));
    //        R_r_unit.setZ(R_r_unit.getZ()/get_ABS(R_r));
    //        //from w w w .j  av a2s.  co  m
    //        R_m_unit.setX(R_m_unit.getX()/get_ABS(R_m));
    //        R_m_unit.setY(R_m_unit.getY()/get_ABS(R_m));
    //        R_m_unit.setZ(R_m_unit.getZ()/get_ABS(R_m));

    double menovatel_r = 0;
    double menovatel_m = 0;

    menovatel_r = Math.pow(get_ABS(R_r), 3);
    menovatel_m = Math.pow(get_ABS(R_m), 3);

    double DELTA_l = get_ABS(deltaL);
    //
    //double DELTA_l = 1; //Rozptie.getKrok();

    FazorVektor deltaE = new FazorVektor(new Complex(0, 0), new Complex(0, 0), new Complex(0, 0));

    deltaE.setX_Real(K * (((tau_real * DELTA_l * R_r_unit.getX()) / menovatel_r)
            - ((tau_real * DELTA_l * R_m_unit.getX()) / menovatel_m)));
    deltaE.setY_Real(K * (((tau_real * DELTA_l * R_r_unit.getY()) / menovatel_r)
            - ((tau_real * DELTA_l * R_m_unit.getY()) / menovatel_m)));
    deltaE.setZ_Real(K * (((tau_real * DELTA_l * R_r_unit.getZ()) / menovatel_r)
            - ((tau_real * DELTA_l * R_m_unit.getZ()) / menovatel_m)));

    deltaE.setX_Imaginary(K * (((tau_image * DELTA_l * R_r_unit.getX()) / menovatel_r)
            - ((tau_image * DELTA_l * R_m_unit.getX()) / menovatel_m)));
    deltaE.setY_Imaginary(K * (((tau_image * DELTA_l * R_r_unit.getY()) / menovatel_r)
            - ((tau_image * DELTA_l * R_m_unit.getY()) / menovatel_m)));
    deltaE.setZ_Imaginary(K * (((tau_image * DELTA_l * R_r_unit.getZ()) / menovatel_r)
            - ((tau_image * DELTA_l * R_m_unit.getZ()) / menovatel_m)));

    return deltaE;
}

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From source file:edu.umass.cs.iesl.pdf2meta.cli.extract.pdfbox.pagedrawer.BeginInlineImage.java

/**
 * process : BI : begin inline image.//from  www.  j a va 2s . co  m
 * @param operator The operator that is being executed.
 * @param arguments List
 * @throws java.io.IOException If there is an error displaying the inline image.
 */
public void process(PDFOperator operator, List<COSBase> arguments) throws IOException {
    GraphicsAwarePDFStreamEngine drawer = (GraphicsAwarePDFStreamEngine) context;

    PDPage page = drawer.getPage();
    //begin inline image object
    ImageParameters params = operator.getImageParameters();
    PDInlinedImage image = new PDInlinedImage();
    image.setImageParameters(params);
    image.setImageData(operator.getImageData());
    BufferedImage awtImage = image.createImage(context.getColorSpaces());

    if (awtImage == null) {
        log.warn("BeginInlineImage.process(): createImage returned NULL");
        return;
    }
    int imageWidth = awtImage.getWidth();
    int imageHeight = awtImage.getHeight();
    double pageHeight = drawer.getPageSize().getHeight();

    Matrix ctm = drawer.getGraphicsState().getCurrentTransformationMatrix();
    int pageRotation = page.findRotation();

    AffineTransform ctmAT = ctm.createAffineTransform();
    ctmAT.scale(1f / imageWidth, 1f / imageHeight);
    Matrix rotationMatrix = new Matrix();
    rotationMatrix.setFromAffineTransform(ctmAT);
    // calculate the inverse rotation angle
    // scaleX = m00 = cos
    // shearX = m01 = -sin
    // tan = sin/cos
    double angle = Math.atan(ctmAT.getShearX() / ctmAT.getScaleX());
    Matrix translationMatrix = null;
    if (pageRotation == 0 || pageRotation == 180) {
        translationMatrix = Matrix.getTranslatingInstance((float) (Math.sin(angle) * ctm.getXScale()),
                (float) (pageHeight - 2 * ctm.getYPosition() - Math.cos(angle) * ctm.getYScale()));
    } else if (pageRotation == 90 || pageRotation == 270) {
        translationMatrix = Matrix.getTranslatingInstance((float) (Math.sin(angle) * ctm.getYScale()),
                (float) (pageHeight - 2 * ctm.getYPosition()));
    }
    rotationMatrix = rotationMatrix.multiply(translationMatrix);
    rotationMatrix.setValue(0, 1, (-1) * rotationMatrix.getValue(0, 1));
    rotationMatrix.setValue(1, 0, (-1) * rotationMatrix.getValue(1, 0));
    AffineTransform at = new AffineTransform(rotationMatrix.getValue(0, 0), rotationMatrix.getValue(0, 1),
            rotationMatrix.getValue(1, 0), rotationMatrix.getValue(1, 1), rotationMatrix.getValue(2, 0),
            rotationMatrix.getValue(2, 1));
    drawer.drawImage(awtImage, at);
}

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From source file:com.day.cq.wcm.foundation.TableTest.java

@org.junit.Test
public void testDoubleDataTable() throws IOException {
    Table table = new Table();
    // fill table
    for (int r = 0; r < 25; r++) {
        for (int c = 0; c < 25; c++) {
            double v = Math.sin(r * 2.0 * Math.PI / 25.0) + Math.cos(c * 2.0 * Math.PI / 25.0);
            table.getCell(r, c, true).setText(String.valueOf(v));
        }// w w  w.java  2  s. c o m
    }
    // check entire table
    double[][] data = table.getDoubleData();
    for (int y = 0; y < data.length; y++) {
        for (int x = 0; x < data[y].length; x++) {
            double d = data[y][x];
            double v = Math.sin(y * 2.0 * Math.PI / 25.0) + Math.cos(x * 2.0 * Math.PI / 25.0);
            assertEquals(d, v, 0.0);
        }
    }
}

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From source file:CircleLayoutTest.java

public void layoutContainer(Container parent) {
    Insets insets = parent.getInsets();
    int containerWidth = parent.getSize().width - insets.left - insets.right;
    int containerHeight = parent.getSize().height - insets.top - insets.bottom;
    int xradius = (containerWidth - maxComponentWidth) / 2;
    int yradius = (containerHeight - maxComponentHeight) / 2;

    setSizes(parent);/*from ww  w .  ja  va  2 s . co m*/
    int centerX = insets.left + containerWidth / 2;
    int centerY = insets.top + containerHeight / 2;

    int comCount = parent.getComponentCount();
    for (int i = 0; i < comCount; i++) {
        Component c = parent.getComponent(i);
        if (c.isVisible()) {
            Dimension size = c.getPreferredSize();
            double angle = 2 * Math.PI * i / comCount;
            int x = centerX + (int) (Math.cos(angle) * xradius);
            int y = centerY + (int) (Math.sin(angle) * yradius);

            c.setBounds(x - size.width / 2, y - size.height / 2, size.width, size.height);
        }
    }
}

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From source file:BackEnd.E_calculation.java

private FazorVektor calc_DE(double tau_real, double tau_image, DPoint Rp, DPoint R0, DPoint R0m, DPoint deltaL)
        throws DelaunayError {
    DPoint R_0 = new DPoint(R0.getX(), R0.getY(), R0.getZ());
    DPoint R_0m = new DPoint(R0.getX(), R0.getY(), R0.getZ());
    R_0.setY(R0.getY() + R0_bundleY); //  bundle korektura pre jeden druhy SMER 
    R_0.setZ(R0.getZ() + Math.cos(beta) * R0_bundleZ); // priemety
    R_0.setX(R0.getX() + Math.sin(beta) * R0_bundleZ);

    R_0m.setY(R0m.getY() - R0_bundleY); //  bundle korektura pre jeden druhy SMER 
    R_0m.setZ(R0m.getZ() + Math.cos(beta) * R0_bundleZ); // priemety
    R_0m.setX(R0m.getX() + Math.sin(beta) * R0_bundleZ);

    //  System.out.println( "R_0= " + R_0 );
    //  System.out.println( "Rp= " + Rp );
    // System.out.println( "deltal= " + deltaL );
    double K = 1 / (4 * Math.PI * constants.getEpsi0() * constants.getEpsi1()); // kontanta

    DPoint R_r = help.substract(Rp, R_0); // rozdiel vektorov Rp a RO
    DPoint R_m = help.substract(Rp, R_0m); // rozdiel vektorov RP a RO mirror
    DPoint R_r_unit = new DPoint(R_r);
    DPoint R_m_unit = new DPoint(R_m);

    R_r_unit.setX(R_r_unit.getX() / get_ABS(R_r));
    R_r_unit.setY(R_r_unit.getY() / get_ABS(R_r));
    R_r_unit.setZ(R_r_unit.getZ() / get_ABS(R_r));

    R_m_unit.setX(R_m_unit.getX() / get_ABS(R_m));
    R_m_unit.setY(R_m_unit.getY() / get_ABS(R_m));
    R_m_unit.setZ(R_m_unit.getZ() / get_ABS(R_m));

    double menovatel_r = Math.pow(get_ABS(R_r), 2);
    double menovatel_m = Math.pow(get_ABS(R_m), 2);
    double DELTA_l = get_ABS(deltaL);
    ////  w ww  .  j av  a 2 s  .  co m
    //double DELTA_l = 1; //Rozptie.getKrok();

    FazorVektor deltaE = new FazorVektor(new Complex(0, 0), new Complex(0, 0), new Complex(0, 0));

    deltaE.setX_Real(K * (((tau_real * DELTA_l * R_r_unit.getX()) / menovatel_r)
            - ((tau_real * DELTA_l * R_m_unit.getX()) / menovatel_m)));
    deltaE.setY_Real(K * (((tau_real * DELTA_l * R_r_unit.getY()) / menovatel_r)
            - ((tau_real * DELTA_l * R_m_unit.getY()) / menovatel_m)));
    deltaE.setZ_Real(K * (((tau_real * DELTA_l * R_r_unit.getZ()) / menovatel_r)
            - ((tau_real * DELTA_l * R_m_unit.getZ()) / menovatel_m)));

    deltaE.setX_Imaginary(K * (((tau_image * DELTA_l * R_r_unit.getX()) / menovatel_r)
            - ((tau_image * DELTA_l * R_m_unit.getX()) / menovatel_m)));
    deltaE.setY_Imaginary(K * (((tau_image * DELTA_l * R_r_unit.getY()) / menovatel_r)
            - ((tau_image * DELTA_l * R_m_unit.getY()) / menovatel_m)));
    deltaE.setZ_Imaginary(K * (((tau_image * DELTA_l * R_r_unit.getZ()) / menovatel_r)
            - ((tau_image * DELTA_l * R_m_unit.getZ()) / menovatel_m)));

    return deltaE;
}

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