public void RTreeQuery_IncrementalRectangles()
{
const int RectsCount = 1000;
const int RegionSize = 1000;
const int RectSize = 10;
for (int seed = 0; seed < 1; ++seed)
{
var rects = new Rectangle[RectsCount];
var rand = new Random(seed);
for (int i = 0; i < RectsCount; ++i)
{
rects[i] = new Rectangle(new Point(rand.Next(RegionSize), rand.Next(RegionSize)));
}
// create rTree with just the first rectangle
var l = new List<KeyValuePair<Rectangle, Rectangle>>
{
new KeyValuePair<Rectangle, Rectangle>(rects[0], rects[0])
};
var queryTree = new RTree<Rectangle>(l);
// add remaining rectangles 10 at a time
for (int a = 1, b = 10; b < RectsCount; a = b, b += 10)
{
for (int i = a; i < b; ++i)
{
queryTree.Add(rects[i], rects[i]);
}
Assert.AreEqual(queryTree.GetAllLeaves().Count(), b, "did we lose leaves?");
Assert.AreEqual(queryTree.GetAllIntersecting(
new Rectangle(0, 0, RegionSize + RectSize, RegionSize + RectSize)).Count(), b,
"are all leaves inside the max range?");
Assert.AreEqual(queryTree.GetAllIntersecting(new Rectangle(-2, -2, -1, -1)).Count(), 0,
"should be no leaves inside this rectangle!");
var query = new Rectangle(rand.Next(RegionSize), rand.Next(RegionSize), rand.Next(RegionSize), rand.Next(RegionSize));
var checkList = (from r in rects.Take(b)
where query.Intersects(r)
select r).ToList();
var checkSet = new HashSet<Rectangle>(checkList);
var result = queryTree.GetAllIntersecting(query).ToList();
Assert.AreEqual(result.Count, checkList.Count, "result and check are different sizes: seed={0}", seed);
foreach (var r in result)
{
Assert.IsTrue(query.Intersects(r), "rect doesn't intersect query: seed={0}, rect={1}, query={2}", seed, r, query);
Assert.IsTrue(checkSet.Contains(r), "check set does not contain rect: seed={0}", seed);
}
}
}
}