Examples with Point2D java.awt.geom.Point2D used on opensource projects

Example 76 with Point2D

use of java.awt.geom.Point2D in project JMRI by JMRI.

the class PositionablePoint method getBounds.

/**
     * @return the bounds of this positional point
     */
public Rectangle2D getBounds() {
    Rectangle2D result;
    Point2D pointA = getCoords();
    result = new Rectangle2D.Double(pointA.getX(), pointA.getY(), 0, 0);
    return result;
}

Example 77 with Point2D

use of java.awt.geom.Point2D in project opennms by OpenNMS.

the class D3TopoLayout method stepOld.

public void stepOld() {
    double currentForce;
    // guass-seidel relaxation for links
    for (E e : getGraph().getEdges()) {
        Pair<V> endPoints = getGraph().getEndpoints(e);
        VertexData srcVertexData = getVertexData(endPoints.getFirst());
        VertexData targetVertexData = getVertexData(endPoints.getSecond());
        double xDelta = targetVertexData.getX() - srcVertexData.getX();
        double yDelta = targetVertexData.getY() - srcVertexData.getY();
        double l = xDelta * xDelta + yDelta * yDelta;
        if (l != 0) {
            EdgeData edgeData = getEdgeData(e);
            double lSqrt = Math.sqrt(l);
            double distance = m_alpha * edgeData.getStrength() * (lSqrt - edgeData.getDistance()) / lSqrt;
            xDelta *= distance;
            yDelta *= distance;
            currentForce = (double) srcVertexData.getWeight() / (double) (targetVertexData.getWeight() + srcVertexData.getWeight());
            targetVertexData.offset(-(xDelta * currentForce), -(yDelta * currentForce));
            currentForce = 1 - currentForce;
            srcVertexData.offset(xDelta * currentForce, yDelta * currentForce);
        }
    }
    // Apply gravity forces
    currentForce = m_alpha * getGravity();
    if (currentForce != 0) {
        double centerX = getSize().getWidth() / 2;
        double centerY = getSize().getHeight() / 2;
        for (V v : getGraph().getVertices()) {
            VertexData vData = getVertexData(v);
            vData.offset((centerX - vData.getX()) * currentForce, (centerY - vData.getY()) * currentForce);
        }
    }
    // Compute quad tree center of mass and apply charge force
    if (getDefaultCharge() != 0) {
        DblBoundingBox bounds = new DblBoundingBox(0, 0, getSize().getWidth(), getSize().getHeight());
        QuadTree<VertexData> quadTree = new QuadTree<VertexData>(bounds);
        for (V v : getGraph().getVertices()) {
            VertexData vData = getVertexData(v);
            quadTree.insert(vData, vData.getCharge(), vData);
        }
        for (V v : getGraph().getVertices()) {
            final VertexData vData = getVertexData(v);
            quadTree.visit(new Visitor<VertexData>() {

                @Override
                public boolean visitNode(Node<VertexData> n) {
                    if (n.isLeaf() && vData == n.getValue())
                        return true;
                    double dx = n.getX() - vData.getX();
                    double dy = n.getY() - vData.getY();
                    double dw = n.getWidth();
                    double dSquared = dx * dx + dy * dy;
                    if (dw * dw / m_thetaSquared < dSquared) {
                        double force = n.getCharge() / dSquared;
                        vData.offset(-(dx * force), -(dy * force));
                        return true;
                    }
                    if (n.isLeaf()) {
                        if (dSquared == 0) {
                            vData.offset(1, 1);
                        } else {
                            double force = n.getCharge() / dSquared;
                            vData.offset(-(dx * force), -(dy * force));
                        }
                        return true;
                    }
                    return false;
                }
            });
        }
    }
    for (V v : getGraph().getVertices()) {
        VertexData vData = getVertexData(v);
        Point2D location = transform(v);
        location.setLocation(vData.getX(), vData.getY());
    }
    m_alpha *= 0.998235;
}

Example 78 with Point2D

use of java.awt.geom.Point2D in project opennms by OpenNMS.

the class D3TopoLayout method initialize.

@Override
public void initialize() {
    // initialize the weights
    for (V v : getGraph().getVertices()) {
        VertexData vData = getVertexData(v);
        vData.setWeight(1);
        Point2D location = transform(v);
        vData.setLocation(location);
        vData.setPrevious(location);
    }
    // initialize the vertices that have edges with weight
    for (E e : getGraph().getEdges()) {
        Pair<V> endPoints = getGraph().getEndpoints(e);
        V v1 = endPoints.getFirst();
        V v2 = endPoints.getSecond();
        VertexData vData1 = getVertexData(v1);
        vData1.setWeight(vData1.getWeight() + 1);
        VertexData vData2 = getVertexData(v2);
        vData2.setWeight(vData2.getWeight() + 1);
    }
// Do we need to do an initial layout, we can rely on the initialized position
}

Example 79 with Point2D

use of java.awt.geom.Point2D in project opennms by OpenNMS.

the class D3TopoLayout method step.

@Override
public void step() {
    double currentForce;
    // guass-seidel relaxation for links
    for (E e : getGraph().getEdges()) {
        Pair<V> endPoints = getGraph().getEndpoints(e);
        VertexData srcVertexData = getVertexData(endPoints.getFirst());
        VertexData targetVertexData = getVertexData(endPoints.getSecond());
        double xDelta = targetVertexData.getX() - srcVertexData.getX();
        double yDelta = targetVertexData.getY() - srcVertexData.getY();
        double l = xDelta * xDelta + yDelta * yDelta;
        if (l != 0) {
            EdgeData edgeData = getEdgeData(e);
            double lSqrt = Math.sqrt(l);
            double distance = m_alpha * edgeData.getStrength() * (lSqrt - edgeData.getDistance()) / lSqrt;
            // double distance = edgeData.getStrength() * (lSqrt - edgeData.getDistance()) / lSqrt;
            xDelta *= distance;
            yDelta *= distance;
            currentForce = (double) srcVertexData.getWeight() / (double) (targetVertexData.getWeight() + srcVertexData.getWeight());
            // currentForce = 0.5;
            targetVertexData.offset(-(xDelta * currentForce), -(yDelta * currentForce));
            currentForce = 1 - currentForce;
            srcVertexData.offset(xDelta * currentForce, yDelta * currentForce);
        }
    }
    // Apply gravity forces
    currentForce = m_alpha * getGravity();
    if (currentForce != 0) {
        double centerX = getSize().getWidth() / 2;
        double centerY = getSize().getHeight() / 2;
        for (V v : getGraph().getVertices()) {
            VertexData vData = getVertexData(v);
            vData.offset((centerX - vData.getX()) * currentForce, (centerY - vData.getY()) * currentForce);
        }
    }
    // Compute quad tree center of mass and apply charge force
    if (getDefaultCharge() != 0) {
        for (V v1 : getGraph().getVertices()) {
            VertexData vData1 = getVertexData(v1);
            for (V v2 : getGraph().getVertices()) {
                VertexData vData2 = getVertexData(v2);
                double dx = vData2.getX() - vData1.getX();
                double dy = vData2.getY() - vData1.getY();
                double d = dx * dx + dy * dy;
                if (d > 0) {
                    double k = m_alpha * vData2.getCharge() / d;
                    double px = dx * k;
                    double py = dy * k;
                    // vData1.offsetPrevious(px, py);
                    vData1.offset(px, py);
                } else {
                    // vData1.offsetPrevious(0.5-Math.random(), 0.5-Math.random());
                    vData1.offset(0.5 - Math.random(), 0.5 - Math.random());
                }
            }
        }
    }
    // position verlet integration
    for (V v : getGraph().getVertices()) {
        VertexData vData = getVertexData(v);
        double tempX = vData.getX();
        double tempY = vData.getY();
        double x = vData.getX() + (vData.getPrevious().getX() - vData.getX()) * getFriction();
        double y = vData.getY() + (vData.getPrevious().getY() - vData.getY()) * getFriction();
        vData.setLocation(x, y);
        vData.setPrevious(tempX, tempY);
        Point2D location = transform(v);
        location.setLocation(vData.getX(), vData.getY());
    }
    m_alpha *= 0.99;
}

Example 80 with Point2D

use of java.awt.geom.Point2D in project dhis2-core by dhis2.

the class GeoUtils method getBoxShape.

/**
     * Returns boundaries of a box shape which centre is the point defined by the 
     * given longitude and latitude. The distance between the center point and the
     * edges of the box is defined in meters by the given distance. Based on standard
     * EPSG:4326 long/lat projection. The result is an array of length 4 where
     * the values at each index are:
     * 
     * <ul>
     * <li>Index 0: Maximum latitude (north edge of box shape).</li>
     * <li>Index 1: Maxium longitude (east edge of box shape).</li>
     * <li>Index 2: Minimum latitude (south edge of box shape).</li>
     * <li>Index 3: Minumum longitude (west edge of box shape).</li>
     * </ul>
     * 
     * @param longitude the longitude.
     * @param latitude the latitude.
     * @param distance the distance in meters to each box edge.
     * @return an array of length 4.
     */
public static double[] getBoxShape(double longitude, double latitude, double distance) {
    double[] box = new double[4];
    GeodeticCalculator calc = new GeodeticCalculator();
    calc.setStartingGeographicPoint(longitude, latitude);
    calc.setDirection(0, distance);
    Point2D north = calc.getDestinationGeographicPoint();
    calc.setDirection(90, distance);
    Point2D east = calc.getDestinationGeographicPoint();
    calc.setDirection(180, distance);
    Point2D south = calc.getDestinationGeographicPoint();
    calc.setDirection(-90, distance);
    Point2D west = calc.getDestinationGeographicPoint();
    box[0] = north.getY();
    box[1] = east.getX();
    box[2] = south.getY();
    box[3] = west.getX();
    return box;
}