Example usage for java.lang Math PI

Introduction

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

Prototype

double PI

To view the source code for java.lang Math PI.

Click Source Link

Document

The double value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter.

Usage

From source file:de.termininistic.serein.examples.benchmarks.functions.multimodal.LevyFunction.java

@Override
public double map(RealVector v) {
    double[] x = v.toArray();
    double sum = Math.pow(Math.sin(Math.PI * w(x[0])), 2);
    for (int i = 0; i < x.length - 1; i++) {
        sum += Math.pow((w(x[i]) - 1), 2) * (1 + 10 * Math.pow(Math.sin(2 * Math.PI * w(x[0]) + 1), 2)
                + Math.pow(w(x[x.length - 1]) - 1, 2)
                        * (1 + Math.pow(Math.sin(2 * Math.PI * w(x[x.length - 1]) + 1), 2)));
    }//  w  w  w .j a va 2s .c om
    return sum;
}

From source file:fr.ign.cogit.simplu3d.test.rjmcmc.cuboid.transformation.birth.TransformToSurfaceTest.java

@Before
public void setUp() throws Exception {
    IPolygon polygon = (IPolygon) WktGeOxygene
            .makeGeOxygene("POLYGON (( 5 0, 5 -10, 15 -10, 15 -5, 10 -5, 10 0, 5 0 ))");
    double[] d = new double[] { 0, 0, 1, 1, 3, 0 };
    double[] v = new double[] { 10, 10, 5, 5, 3, Math.PI };
    t = new TransformToSurface(d, v, polygon);
}

From source file:com.mapr.synth.drive.Producer.java

@Override
public void run() {
    Random rand = new Random(3);
    GeoPoint start = new GeoPoint((rand.nextDouble() - 0.5) * Math.PI / 2, rand.nextDouble() * Math.PI * 2);
    final Vector3D east = start.east();
    final Vector3D north = start.north(east);

    GeoPoint end = new GeoPoint(start.as3D().add(east.scalarMultiply(-12.0 / Constants.EARTH_RADIUS_KM))
            .add(north.scalarMultiply(7.0 / Constants.EARTH_RADIUS_KM)));

    Vector3D zz = project(east, north, end.as3D());
    System.out.printf("==> %.2f %.2f\n", zz.getX(), zz.getY());

    while (true) {
        double t = 0;
        final Car car = new Car();

        System.out.printf("%.2f\n", start.distance(end));
        car.driveTo(rand, t, start, end, new Car.Callback() {
            @Override/*www  .  jav a  2 s  .co m*/
            void call(double t, Engine eng, GeoPoint position) {
                final Vector3D here = project(east, north, position.as3D());
                try {
                    output.put(new Trails.State(new Engine(eng), here));
                } catch (InterruptedException e) {
                    throw new RuntimeException("Interrupted", e);
                }
            }
        });
    }
}

From source file:com.deicos.lince.components.SinChartComponent.java

public SinChartComponent() {
    NumberAxis xAxis = new NumberAxis();
    xAxis.setLabel("x");
    NumberAxis yAxis = new NumberAxis();
    yAxis.setLabel("y");
    XYChart.Series<Number, Number> series = new XYChart.Series<>();
    series.setName("Sine");
    ObservableList<XYChart.Data<Number, Number>> data = series.getData();
    for (double x = -Math.PI; x < Math.PI; x += 0.5) {
        data.add(new XYChart.Data<Number, Number>(x, 10 * Math.sin(x)));
    }//from w w  w . j a  va 2 s. c o  m
    LineChart<Number, Number> lineChart = new LineChart<Number, Number>(xAxis, yAxis);
    lineChart.setTitle("Sine function");
    lineChart.getData().add(series);

    getChildren().add(lineChart);
}

From source file:edu.ucsf.valelab.saim.calculations.SaimCalc.java

/**
 * Calculates the phase difference as a function of height as described in:
 * Paszek, M.J., C.C. DuFort, M.G. Rubashkin, M.W. Davidson, K.S. Thorn, J.T. 
 * Liphardt, and V.M. Weaver. 2012. /*from   ww w.j  ava  2s  .c om*/
 * Scanning angle interference microscopy reveals cell dynamics at the nanoscale. 
 * Nat Meth. 9:825827. doi:10.1038/nmeth.2077.
 *
 * @param wavelength of the excitation light source in nm
 * @param nSample refractive index of the sample medium
 * @param angle Angle with respect to the normal in the sample in radians
 * @param axialPos Position in the sample above the silicon oxide (in nm)
 * @return phase difference (dimensionless)
 */
public static double PhaseDiff(final double wavelength, final double angle, final double nSample,
        final double axialPos) {
    return 4.0 * Math.PI * nSample * axialPos * Math.cos(angle) / wavelength;
}

From source file:demo.components.SinChartComponent.java

public SinChartComponent() {

    NumberAxis xAxis = new NumberAxis();
    xAxis.setLabel("x");

    NumberAxis yAxis = new NumberAxis();
    yAxis.setLabel("y");

    XYChart.Series<Number, Number> series = new XYChart.Series<>();
    series.setName("Sine");

    ObservableList<XYChart.Data<Number, Number>> data = series.getData();

    for (double x = -Math.PI; x < Math.PI; x += 0.5) {
        data.add(new XYChart.Data<Number, Number>(x, 10 * Math.sin(x)));
    }//from  w ww  . j av  a2 s  . c om

    LineChart<Number, Number> lineChart = new LineChart<Number, Number>(xAxis, yAxis);
    lineChart.setTitle("Sine function");
    lineChart.getData().add(series);

    getChildren().add(lineChart);
}

From source file:com.offbynull.peernetic.debug.visualizer.VisualizerUtils.java

/**
 * Creates point on a circle./*from w ww . j a v  a  2  s  .c  o  m*/
 * @param radius radius of circle
 * @param percentage 0 to 1 percentage of where point is on circle -- 0.0 indicates that the point is at the top middle
 * @return new point on circle specified by {@code radius} and {@code percentage}
 * @throws IllegalArgumentException if {@code radius} is negative or a special double value (e.g. NaN/infinite/etc..), or if
 * {@code percentage} isn't between {@code 0.0 - 1.0}
 */
public static Point pointOnCircle(double radius, double percentage) {
    Validate.inclusiveBetween(0.0, Double.MAX_VALUE, radius);
    Validate.inclusiveBetween(0.0, 1.0, percentage);
    double angle = percentage * Math.PI * 2.0;
    angle -= Math.PI / 2.0; // adjust so that percentage 0.0 is at top middle, if not it'ld be at middle right

    double y = (Math.sin(angle) * radius) + radius; // NOPMD
    double x = (Math.cos(angle) * radius) + radius; // NOPMD

    return new Point((int) x, (int) y);
}

From source file:Rotation.java

/**
 * Erstellt den Szenegraphen//from   w  w w.  j a  v  a 2  s  .  co m
 * 
 * @return BranchGroup
 */
public BranchGroup macheSzene() {
    BranchGroup objWurzel = new BranchGroup();
    // Transformation, 2 Rotationen:
    Transform3D drehung = new Transform3D();
    Transform3D drehung2 = new Transform3D();
    drehung.rotX(Math.PI / 4.0d);
    drehung2.rotY(Math.PI / 5.0d);
    drehung.mul(drehung2);
    TransformGroup objDreh = new TransformGroup(drehung);
    TransformGroup spin = new TransformGroup();
    spin.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    spin.addChild(new ColorCube(0.4));
    objDreh.addChild(spin);
    objWurzel.addChild(objDreh);

    // Drehung
    Alpha spinAlpha = new Alpha(-1, 5000);
    RotationInterpolator dreher = new RotationInterpolator(spinAlpha, spin);
    BoundingSphere zone = new BoundingSphere();
    dreher.setSchedulingBounds(zone);
    spin.addChild(dreher);

    return objWurzel;
}

From source file:Erscheinungsbild.java

/**
 * Erstellt den Szenegraphen//ww  w. j a  va  2s. c  o  m
 * 
 * @return BranchGroup
 */
public BranchGroup macheSzene() {
    BranchGroup objWurzel = new BranchGroup();
    // Transformation, 2 Rotationen:
    Transform3D drehung = new Transform3D();
    Transform3D drehung2 = new Transform3D();
    drehung.rotX(Math.PI / 4.0d);
    drehung2.rotY(Math.PI / 5.0d);
    drehung.mul(drehung2);
    TransformGroup objDreh = new TransformGroup(drehung);
    objDreh.addChild(new Box(0.5f, 0.5f, 0.5f, makeAppearance()));
    objWurzel.addChild(objDreh);

    return objWurzel;
}

From source file:dev.maisentito.suca.commands.EvalCommandHandler.java

@Override
public void handleCommand(MessageEvent event, String[] args) throws Throwable {
    double result = new ExpressionBuilder(StringUtils.join(args, ' ')).variables("pi", "e").build()
            .setVariable("pi", Math.PI).setVariable("e", Math.E).evaluate();

    event.respond("eval: result: " + result);
}