public void visit(FloatRectangle region, IQuadTreeElementsVisitor<E> visitor) {
region = bounds.intersection(region);
if (region.isEmpty()) return;
if (isLeaf()) {
if (bounds.equals(region))
for (FloatPoint location : contents.keySet())
visitor.visit(this, location, contents.get(location));
else
for (FloatPoint location : contents.keySet())
if (region.contains(location)) visitor.visit(this, location, contents.get(location));
} else {
for (QuadTree<E> quadrant : quadrants) quadrant.visit(region, visitor);
}
}
public void visit(FloatRectangle region, IQuadTreeVisitor<E> visitor) {
if (!region.intersects(bounds)) return;
if (visitor.visit(this)) {
if (!isLeaf()) {
for (QuadTree<E> quadrant : quadrants) quadrant.visit(region, visitor);
}
}
}