README.md

kdbush

C# KD-Bush implementation

Based on this JavaScript implementation by Vladimir Agafonkin

KD-Bush is a very fast static spatial index for 2D points based on a flat KD-tree.
Compared to RBush:

• points only — no rectangles
• static — you can't add/remove items
• indexing is 5-8 times faster

Usage

using KDBush

KDBush<int> kdbush = new KDBush<int>();

List<Point<int>> points = new List<Point<int>>(){
    new Point<int>(54, 1, 0),
    new Point<int>(97, 21, 1)
};

kdbush.Index(points);

// Get all points that lie inside the rectangle 
// (20, 30)-(50, 70)
var result = kdbush.Query(20, 30, 50, 70);

// Get all points that lie inside the circle 
// centered at (50, 50) with radius 20
result = kdbush.Query(50, 50, 20);