napejs.org valid

@newkrok/nape-js

Modern TypeScript 2D physics engine for the web. Fully typed, with object pooling and dual ESM/CJS exports (~175 KB gzip bundled). Originally ported from the Haxe Nape engine by Luca Deltodesco.

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-23T05:47:12.620Z. Cached copy · Source on napejs.org

# @newkrok/nape-js

> Modern TypeScript 2D physics engine for the web. Fully typed, with object pooling and dual ESM/CJS exports (~175 KB gzip bundled). Originally ported from the Haxe Nape engine by Luca Deltodesco.

Install: `npm install @newkrok/nape-js`

- [GitHub Repository](https://github.com/NewKrok/nape-js): Source code, issues, contributing guide
- [npm Package](https://www.npmjs.com/package/@newkrok/nape-js): Published package with TypeScript declarations
- [API Reference](https://napejs.org/api/index.html): Full TypeDoc-generated API docs
- [Interactive Demos](https://napejs.org/examples): Live physics demos with source code — every demo also has its own page at https://napejs.org/examples/<id>/
- [Games built on nape-js](https://napejs.org/games/): Complete playable game demos (AI, waves, cameras, 3D rigs) and shipped titles — the reference for "how do I build X" questions
- [Full LLM Documentation](https://raw.githubusercontent.com/NewKrok/nape-js/master/packages/nape-js/llms-full.txt): Complete API reference in a single file
- [Prompt Collection](https://napejs.org/ai.html): Copy-paste prompts for building a game with an LLM, plus the API mistakes models reliably make
- [Cookbook](https://napejs.org/guides/cookbook/): Task-oriented recipes (platformer, ragdoll, fluid, serialization, replay, etc.)
- [Replay Guide](https://napejs.org/guides/replay-guide/): Recorder + Player + binary encode/decode + determinism contract
- [Troubleshooting](https://napejs.org/guides/troubleshooting/): Common problems and solutions
- [Anti-Patterns](https://napejs.org/guides/anti-patterns/): Common mistakes to avoid
- [PixiJS Integration](https://www.npmjs.com/package/@newkrok/nape-pixi) (`@newkrok/nape-pixi`): Sibling package — body/sprite sync, fixed-step render interpolation, debug draw, and off-thread physics bridge. PIXI v8.

## Quick Start

```typescript
import { Space, Body, BodyType, Vec2, Circle, Polygon } from "@newkrok/nape-js";

const space = new Space(new Vec2(0, 600));

const floor = new Body(BodyType.STATIC, new Vec2(400, 550));
floor.shapes.add(new Polygon(Polygon.box(800, 20)));
floor.space = space;

const ball = new Body(BodyType.DYNAMIC, new Vec2(400, 100));
ball.shapes.add(new Circle(20));
ball.space = space;

function update() {
  space.step(1 / 60);
}
```

Version check: `import { VERSION } from "@newkrok/nape-js"` — or, after any import, read the `__NAPE_JS__` global in the console (three.js-style).

## Common Mistakes (read before generating code)

These are the places nape-js differs from Box2D/Matter.js, where models most often generate broken code.

- **No `space.add()`** — a body joins the world by assignment: `body.space = space`. Shapes attach with `body.shapes.add(shape)`.
- **No `body.applyForce()`** — assign `body.force = new Vec2(x, y)`. The value **persists across `space.step()`**, so clear it each frame unless you want accumulation. `body.applyImpulse(vec)` is a real method and is usually the right one.
- **Fast bodies
…

Machine-readable: GET /v1/resolve?q=napejs.org · GET /v1/domain/napejs.org · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for napejs.org:
1. POST https://agentwebmap.com/v1/sites/napejs.org/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://napejs.org/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/napejs.org/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/napejs.org).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory.