private void visualize(RNode n, java.io.PrintWriter pw, int x0, int y0, int w, int h) {
pw.printf(
"<div style=\"position:absolute; left: %d; top: %d; width: %d; height: %d; border: 1px dashed\">\n",
x0, y0, w, h);
pw.println("<pre>");
pw.println("Node: " + n.toString() + " \n(root==" + (n == root) + ") \n");
pw.println("Coords start: " + Arrays.toString(n.getMbr().getP_start()) + "\n");
pw.println("coords end: " + Arrays.toString(n.getMbr().getP_end()) + "\n");
pw.println("# Children: " + ((n.children() == null) ? 0 : n.children().size()) + "\n");
if (n instanceof REntry) {
REntry n1 = (REntry) n;
pw.println("Content: " + n1.getContent());
}
pw.println("isLeaf: " + n.isLeaf() + "\n");
pw.println("</pre>");
int numChildren = (n.children() == null) ? 0 : n.children().size();
for (int i = 0; i < numChildren; i++) {
visualize(
n.children().get(i),
pw,
(int) (x0 + (i * w / (float) numChildren)),
y0 + elemHeight,
(int) (w / (float) numChildren),
h - elemHeight);
}
pw.println("</div>");
}
private double getDistance(RNode e1, RNode e2) {
double[] a1 = e1.getMbr().getP_start();
double[] a2 = e1.getMbr().getP_end();
double[] b1 = e2.getMbr().getP_start();
double[] b2 = e2.getMbr().getP_end();
double dist = 0;
for (int i = 0; i < dimension; i++) {
/*suma los cuadrados de la resta de los puntos medios de los 2 mbr's para cada coordenada*/
dist += Math.pow(Math.abs(a1[i] - a2[i]) / 2.0 - Math.abs(b1[i] - b2[i]) / 2.0, 2);
}
dist = Math.sqrt(dist);
return dist;
}
private double getEnlargement(RNode host, RNode guest) throws DimensionalException {
double[] p1Host = host.getMbr().getP_start();
double[] p2Host = host.getMbr().getP_end();
double[] p1Guest = guest.getMbr().getP_start();
double[] p2Guest = guest.getMbr().getP_end();
double[] minRes = new double[dimension];
double[] maxRes = new double[dimension];
for (int i = 0; i < dimension; i++) {
double minH = Math.min(p1Host[i], p2Host[i]);
double maxH = Math.max(p1Host[i], p2Host[i]);
double minG = Math.min(p1Guest[i], p2Guest[i]);
double maxG = Math.max(p1Guest[i], p2Guest[i]);
if (minG < minH) minRes[i] = minG;
else minRes[i] = minH;
if (maxG > maxH) maxRes[i] = maxG;
else maxRes[i] = maxH;
}
return new MBR(minRes, maxRes, dimension).getArea() - host.getMbr().getArea();
}
/**
* shrinks the mbr area to the just necessary
*
* @param n
*/
private void update(RNode n) throws DimensionalException {
double[] minCoords = new double[dimension];
double[] maxCoords = new double[dimension];
for (int i = 0; i < dimension; i++) {
minCoords[i] = Double.MAX_VALUE;
maxCoords[i] = -Double.MAX_VALUE;
for (RNode c : n.children()) {
c.setParent(n);
double minp = Math.min(c.getMbr().getP_start()[i], c.getMbr().getP_end()[i]);
double maxp = Math.max(c.getMbr().getP_end()[i], c.getMbr().getP_start()[i]);
if (minp < minCoords[i]) {
minCoords[i] = minp;
}
if (maxp > maxCoords[i]) {
maxCoords[i] = maxp;
}
}
}
n.setMbr(new MBR(minCoords, maxCoords, dimension));
}
private RNode[] quadSeeds(List<RNode> cc) throws DimensionalException {
RNode e1;
RNode e2;
RNode s1 = null;
RNode s2 = null;
double maxDeadSpace = -Double.MAX_VALUE;
for (int i = 0; i < dimension; i++) {
for (int k = i + 1; k < dimension; k++) {
e1 = cc.get(i);
e2 = cc.get(k);
double areae1 = e1.getMbr().getArea();
double areae2 = e2.getMbr().getArea();
double[] p1Host = e1.getMbr().getP_start();
double[] p2Host = e1.getMbr().getP_end();
double[] p1Guest = e2.getMbr().getP_start();
double[] p2Guest = e2.getMbr().getP_end();
double[] minRes = new double[dimension];
double[] maxRes = new double[dimension];
for (int j = 0; j < dimension; j++) {
double minH = Math.min(p1Host[j], p2Host[j]);
double maxH = Math.max(p1Host[j], p2Host[j]);
double minG = Math.min(p1Guest[j], p2Guest[j]);
double maxG = Math.max(p1Guest[j], p2Guest[j]);
if (minG < minH) minRes[j] = minG;
else minRes[j] = minH;
if (maxG > maxH) maxRes[j] = maxG;
else maxRes[j] = maxH;
}
MBR ambr = new MBR(minRes, maxRes, dimension);
double totarea = ambr.getArea();
if (maxDeadSpace < totarea - areae1 - areae2) {
maxDeadSpace = totarea - areae1 - areae2;
s1 = e1;
s2 = e2;
}
}
}
RNode[] seeds = new RNode[] {s1, s2};
cc.removeAll(Arrays.asList(seeds));
return seeds;
}
private RNode getMinimalAreaNode(List<RNode> nodes) {
RNode minimal = null;
double minArea = Double.MAX_VALUE;
for (RNode e : nodes) {
double eArea = e.getMbr().getArea();
if (eArea < minArea) {
minArea = eArea;
minimal = e;
}
}
return minimal;
}
private RNode[] makePartition(RNode n) throws DimensionalException {
numOfPartitions++;
numOfNodes += 2;
RNode[] parts = new RNode[] {n, new RNode(n.getMbr(), n.isLeaf(), M_order)};
parts[1].setParent(n.getParent());
if (parts[1].getParent() != null) {
parts[1].getParent().children().add(parts[1]);
}
List<RNode> cpyc = new LinkedList<RNode>(n.children());
n.children().clear();
RNode[] seeds = getSeeds(cpyc);
parts[0].children().add(seeds[0]);
parts[1].children().add(seeds[1]);
update(parts[0]);
update(parts[1]);
while (!cpyc.isEmpty()) {
if (parts[0].missingEntries(m_order) == 0
&& parts[1].missingEntries(m_order) + cpyc.size() == m_order) {
parts[1].children().addAll(cpyc);
cpyc.clear();
update(parts[0]);
update(parts[1]);
return parts;
} else if (parts[1].missingEntries(m_order) == 0
&& parts[0].missingEntries(m_order) + cpyc.size() == m_order) {
parts[0].children().addAll(cpyc);
cpyc.clear();
update(parts[0]);
update(parts[1]);
return parts;
}
RNode next = chooseNext(cpyc, seeds), chosen;
double enl1 = getEnlargement(parts[0], next);
double enl2 = getEnlargement(parts[1], next);
if (enl1 < enl2) chosen = parts[0];
else if (enl2 < enl1) chosen = parts[1];
else {
double ar1 = parts[0].getMbr().getArea();
double ar2 = parts[1].getMbr().getArea();
if (ar1 < ar2) chosen = parts[0];
else if (ar2 < ar1) chosen = parts[1];
else {
if (parts[0].children().size() < parts[1].children().size()) chosen = parts[0];
else if (parts[0].children().size() > parts[1].children().size()) chosen = parts[1];
else chosen = parts[new Random().nextInt(2)];
}
}
chosen.children().add(next);
update(chosen);
}
return parts;
}