public boolean insert(Point2D p) {
if (p.equals(value)) {
return false;
}
if (onLeft(p)) {
if (left == null) {
final TreeNode treeNode = newNode(p, this);
treeNode.rect =
even
? new RectHV(rect.xmin(), rect.ymin(), value.x(), rect.ymax())
: new RectHV(rect.xmin(), rect.ymin(), rect.xmax(), value.y());
left = treeNode;
return true;
} else {
return left.insert(p);
}
} else if (onRight(p)) {
if (right == null) {
TreeNode treeNode = newNode(p, this);
treeNode.rect =
even
? new RectHV(rect.xmin(), value.y(), rect.xmax(), rect.ymax())
: new RectHV(rect.xmin(), value.y(), rect.xmax(), rect.ymax());
right = treeNode;
return true;
} else {
return right.insert(p);
}
}
return false;
}
public boolean contains(Point2D p) {
if (p.equals(value)) {
return true;
} else if (onLeft(p)) {
return left != null && left.contains(p);
} else if (onRight(p)) {
return right != null && right.contains(p);
} else {
System.out.println("Impossible!");
return false;
}
}
public Point2D ceiling(Point2D p, boolean inclusive) {
requireNonNull(p);
if (value.equals(p)) {
return value;
} else if (onRight(p)) {
if (right != null && right.onLeft(p)) {
return inclusive ? value : right.value;
} else if (right != null && right.onRight(p)) {
return right.ceiling(p, inclusive);
} else {
return inclusive ? value : null;
}
} else if (onLeft(p)) {
return left == null ? inclusive ? null : value : left.ceiling(p, inclusive);
} else {
return inclusive ? value : null;
}
}
private Node put(final Node x, final Point2D key, final boolean vertical) {
if (x == null) {
return new Node(key, 1);
}
double cmp;
if (vertical) {
cmp = key.x() - x.key.x();
} else {
cmp = key.y() - x.key.y();
}
if (key.equals(x.key)) {
// do nothing
} else if (cmp <= 0) {
x.left = put(x.left, key, !vertical);
x.N = 1 + size(x.left) + size(x.right);
} else if (cmp > 0) {
x.right = put(x.right, key, !vertical);
x.N = 1 + size(x.left) + size(x.right);
}
return x;
}