Examples with DefaultWritablePolygon2D net.imglib2.roi.geom.real.DefaultWritablePolygon2D used on opensource projects

Example 1 with DefaultWritablePolygon2D

use of net.imglib2.roi.geom.real.DefaultWritablePolygon2D in project imagej-ops by imagej.

the class DefaultSmallestEnclosingRectangle method rotate.

/**
 * Rotates the given Polygon2D consisting of a list of RealPoints by the
 * given angle about the given center.
 *
 * @param inPoly A Polygon2D consisting of a list of RealPoint RealPoints
 * @param angle the rotation angle
 * @param center the rotation center
 * @return a rotated polygon
 */
private Polygon2D rotate(final Polygon2D inPoly, final double angle, final RealLocalizable center) {
    List<RealLocalizable> out = new ArrayList<>();
    for (RealLocalizable RealPoint : GeomUtils.vertices(inPoly)) {
        // double angleInRadians = Math.toRadians(angleInDegrees);
        double cosTheta = Math.cos(angle);
        double sinTheta = Math.sin(angle);
        double x = cosTheta * (RealPoint.getDoublePosition(0) - center.getDoublePosition(0)) - sinTheta * (RealPoint.getDoublePosition(1) - center.getDoublePosition(1)) + center.getDoublePosition(0);
        double y = sinTheta * (RealPoint.getDoublePosition(0) - center.getDoublePosition(0)) + cosTheta * (RealPoint.getDoublePosition(1) - center.getDoublePosition(1)) + center.getDoublePosition(1);
        out.add(new RealPoint(x, y));
    }
    return new DefaultWritablePolygon2D(out);
}

Example 2 with DefaultWritablePolygon2D

use of net.imglib2.roi.geom.real.DefaultWritablePolygon2D in project imagej-ops by imagej.

the class DefaultBoundingBox method calculate.

@Override
public Polygon2D calculate(final Polygon2D input) {
    double min_x = Double.POSITIVE_INFINITY;
    double max_x = Double.NEGATIVE_INFINITY;
    double min_y = Double.POSITIVE_INFINITY;
    double max_y = Double.NEGATIVE_INFINITY;
    for (final RealLocalizable rl : GeomUtils.vertices(input)) {
        if (rl.getDoublePosition(0) < min_x) {
            min_x = rl.getDoublePosition(0);
        }
        if (rl.getDoublePosition(0) > max_x) {
            max_x = rl.getDoublePosition(0);
        }
        if (rl.getDoublePosition(1) < min_y) {
            min_y = rl.getDoublePosition(1);
        }
        if (rl.getDoublePosition(1) > max_y) {
            max_y = rl.getDoublePosition(1);
        }
    }
    final List<RealLocalizable> bounds = new ArrayList<>();
    bounds.add(new RealPoint(min_x, min_y));
    bounds.add(new RealPoint(min_x, max_y));
    bounds.add(new RealPoint(max_x, max_y));
    bounds.add(new RealPoint(max_x, min_y));
    return new DefaultWritablePolygon2D(bounds);
}

Example 3 with DefaultWritablePolygon2D

use of net.imglib2.roi.geom.real.DefaultWritablePolygon2D in project imagej-ops by imagej.

the class DefaultContour method calculate.

@Override
public Polygon2D calculate(final RandomAccessibleInterval<B> input) {
    List<RealPoint> p = new ArrayList<>();
    final B var = Util.getTypeFromInterval(input).createVariable();
    final RandomAccess<B> raInput = Views.extendValue(input, var).randomAccess();
    final Cursor<B> cInput = Views.flatIterable(input).cursor();
    final ClockwiseMooreNeighborhoodIterator<B> cNeigh = new ClockwiseMooreNeighborhoodIterator<>(raInput);
    double[] position = new double[2];
    double[] startPos = new double[2];
    // find first true pixel
    while (cInput.hasNext()) {
        // we are looking for a true pixel
        if (cInput.next().get()) {
            raInput.setPosition(cInput);
            raInput.localize(startPos);
            // add to polygon
            p.add(new RealPoint(startPos[0], startPos[1]));
            // backtrack:
            raInput.move(-1, 0);
            cNeigh.reset();
            while (cNeigh.hasNext()) {
                if (cNeigh.next().get()) {
                    boolean specialBacktrack = false;
                    raInput.localize(position);
                    if (startPos[0] == position[0] && startPos[1] == position[1]) {
                        // startPoint was found.
                        if (useJacobs) {
                            // Jacobs stopping criteria
                            final int index = cNeigh.getIndex();
                            if (index == 1 || index == 0) {
                                // Jonathans refinement to
                                // non-terminating jacobs criteria
                                specialBacktrack = true;
                            } else if (index == 2 || index == 3) {
                                // way.
                                break;
                            }
                        // else criteria not fulfilled, continue.
                        } else {
                            break;
                        }
                    }
                    // add found point to polygon
                    p.add(new RealPoint(position[0], position[1]));
                    if (specialBacktrack) {
                        cNeigh.backtrackSpecial();
                    } else {
                        cNeigh.backtrack();
                    }
                }
            }
            // we only need to extract one contour.
            break;
        }
    }
    return new DefaultWritablePolygon2D(p);
}

Example 4 with DefaultWritablePolygon2D

use of net.imglib2.roi.geom.real.DefaultWritablePolygon2D in project imagej-ops by imagej.

the class DefaultConvexHull2D method calculate.

@Override
public Polygon2D calculate(final Polygon2D input) {
    // create a copy of points because se will get resorted, etc.
    List<? extends RealLocalizable> RealPoints = new ArrayList<>(GeomUtils.vertices(input));
    // Sort RealPoints of P by x-coordinate (in case of a tie, sort by
    // y-coordinate).
    Collections.sort(RealPoints, new Comparator<RealLocalizable>() {

        @Override
        public int compare(final RealLocalizable o1, final RealLocalizable o2) {
            final Double o1x = new Double(o1.getDoublePosition(0));
            final Double o2x = new Double(o2.getDoublePosition(0));
            final int result = o1x.compareTo(o2x);
            if (result == 0) {
                return new Double(o1.getDoublePosition(1)).compareTo(new Double(o2.getDoublePosition(1)));
            }
            return result;
        }
    });
    // Initialize U and L as empty lists.
    // lists will hold vertices of upper and lower hulls
    // respectively.
    final List<RealLocalizable> U = new ArrayList<>();
    final List<RealLocalizable> L = new ArrayList<>();
    // build lower hull
    for (final RealLocalizable p : RealPoints) {
        // turn: remove last RealPoint from L
        while (L.size() >= 2 && ccw(L.get(L.size() - 2), L.get(L.size() - 1), p) <= 0) {
            L.remove(L.size() - 1);
        }
        L.add(p);
    }
    // build upper hull
    Collections.reverse(RealPoints);
    for (final RealLocalizable p : RealPoints) {
        // turn: remove last RealPoint from U
        while (U.size() >= 2 && ccw(U.get(U.size() - 2), U.get(U.size() - 1), p) <= 0) {
            U.remove(U.size() - 1);
        }
        U.add(p);
    }
    // Remove last RealPoint of each list (it's same as first
    // RealPoint
    // of or list).
    L.remove(L.size() - 1);
    U.remove(U.size() - 1);
    // concatenate L and U
    L.addAll(U);
    return new DefaultWritablePolygon2D(L);
}

Example 5 with DefaultWritablePolygon2D

use of net.imglib2.roi.geom.real.DefaultWritablePolygon2D in project imagej-ops by imagej.

the class AbstractFeatureTest method getPolygon.

protected static Polygon2D getPolygon() {
    final List<RealPoint> vertices = new ArrayList<>();
    try {
        Files.lines(Paths.get(AbstractFeatureTest.class.getResource("2d_geometric_features_polygon.txt").toURI())).forEach(l -> {
            String[] coord = l.split(" ");
            RealPoint v = new RealPoint(new double[] { Double.parseDouble(coord[0]), Double.parseDouble(coord[1]) });
            vertices.add(v);
        });
    } catch (IOException | URISyntaxException exc) {
        exc.printStackTrace();
    }
    return new DefaultWritablePolygon2D(vertices);
}