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@serbanghita-gamedev/quadtree

v1.0.2

Published

Quadtree

Readme

Quadtree

Quadtree implementation & demos

Usage

const area = new Rectangle(640, 480, new Point(640/2, 480/2));
const quadtree = new QuadTree(area, 3, 3);

const queryArea = new Rectangle(120, 120, new Point(randomInt(0, 640), randomInt(0, 480)));
const pointsFound = quadtree.query(queryArea);

Interactive Demo

Run the interactive canvas demo:

npm run demo

This will start a Vite dev server and open your browser to http://localhost:5173/

Features:

  • Click and drag to draw points on the canvas
  • Watch the quadtree subdivide in real-time as you add points
  • Points are displayed as red circles
  • Quadtree boundaries are shown as grey lines
  • View live stats showing total points and quadrants
  • Clear button to reset the visualization

Available Scripts

Build

npm run build

Bundles the library using esbuild.

Test

npm run test

Run the test suite with Vitest.

For coverage:

npx vitest --coverage

Lint

npm run lint

Run ESLint on the source code (requires ESLint configuration).

Demo

npm run demo

Launch the interactive quadtree visualization demo.

Benchmarks

npx vitest bench --run --testNamePattern=queryArea QuadTree.bench.ts

Examples

Quadtree line example

Quadtree line demo

Quadtree with maxDepth=3

Quadtree with maxDept=3

Query on quadtree with maxDepth=10 (3000 points)

Quadtree with maxDept=10