Meep Engine

The unopinionated, high-performance ECS engine for code-first developers.

Meep is a battle-tested JavaScript game engine designed for scale. Built over 10+ years and used in commercial Steam releases, it strips away the bloat of traditional engines to offer a molecular, zero-allocation architecture.

It is designed for engineers who want full control, offering performance that rivals native code on the web.

🚀 Quick Start Template | 📚 Documentation

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Why Meep?

Most web engines are heavy, opinionated, and struggle with garbage collection. Meep is different.

* Pure ECS Architecture: A true data-oriented foundation that supports complex hierarchies and millions of entities. Unlike hybrid engines, our component queries are instantaneous.
* Molecular Modularity: Distributed as ~3,000 fine-grained modules. Need a lerp function? Import it for a 4-line footprint. You never pay for code you don't use.
* Zero-Garbage Architecture: Custom memory management ensures stable frame rates. Meep handles millions of objects on low-spec mobile hardware without GC spikes.
* Code-First: No GUI. No black boxes. Meep is a programmatic tool designed for software engineers who value architecture and long-term integration.
* Battle-Hardened: Covered by 3,000+ unit tests and extensive assertions. This is not a prototype; it is industrial-grade software.

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💎 Architecture: Pure ECS

Meep is not yet another Object-Oriented engine with an ECS tacked on; it is a Pure Entity Component System engine.

While other engines (like Unity) struggle with slow query times and documentation that advises you to use component lookups "sparingly" — Meep thrives on them.

* Strict Data-Oriented Design: One component instance per type per entity. This guarantees memory layout optimization and cache locality.
* The Hierarchy Problem: Solved. Pure ECS architectures historically struggle with scene graphs and parent-child transforms. Meep solves this natively. You get the composability of a scene graph with the raw speed of a flat array. (Similar to the Rust-based Bevy engine).
* Tiered API Access:
* High-Level: Use convenient abstraction layers for gameplay logic.
* Low-Level: Drop down to raw typed arrays for performance-critical paths.
* Uncompromised Speed: Because the architecture is solid, you can query, filter, and iterate over millions of entities without performance cliffs.

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⚡ High-Performance Rendering

Meep implements a Clustered Forward+ rendering pipeline, allowing for scenes that traditional web engines choke on.

* Unlimited Lighting: Render thousands of point lights (muzzle flashes, explosions, torches) with clustered lighting.

* GPU-Driven Decals: Handle 1,000,000+ decals for persistent battle damage and environmental details.

* Massive Terrain: Chunk-based, auto-culled terrain system supporting up to 256 layers (vs Unity's 4).

* "Particular" Particle Engine: A zero-allocation particle system with full lighting, soft particles, and automatic atlassing. Compiled into just 4 shaders to eliminate state-switching overhead.

* Path Tracing: Includes a pure JS path tracer utilizing the engine's internal BVH.

🧠 AI & Simulation Tools

Meep provides a suite of tools rarely found in JS engines, optimized for complex decision making.

* Behavior Trees & Blackboards: Industry-standard tools for state management.

* Monte-Carlo Tree Search: The same algorithm used in AlphaGo, available for your decision logic.

* Resource Allocation Solver: Plan optimal actions based on limited resources (ammo, health, currency).

* Spatial Query System: Highly optimized BVH for Ray, Box, Frustum, and Point queries.

* Inverse Kinematics: Includes FABRIK solvers and specialized bip/quadruped solvers for uneven terrain adaptation.

🛠️ Developer Experience

$3

Meep is designed to be invisible in production.
``

shell

npm install @woosh/meep-engine





Development Mode: The engine includes ~4,000 assertions to help you catch errors instantly.



Production Mode: Using @rollup/plugin-strip, Meep compiles to tiny size and runs at the speed of light.

js

// vite.config.js

import strip from '@rollup/plugin-strip';

export default defineConfig({

    plugins: [{ ...strip(), apply: 'build' }]

});

$3

* Tests: 2,944 handwritten tests covering critical algorithms and complex edge cases.

* Coverage: 90%+ core coverage.

* Stability: Exhaustively tested corner cases over a decade of development.

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Additional Features

| Category | Features |
|------------------|-----------------------------------------------------------------------------------------------------------------------|
| Audio | Custom culling and attenuation; supports 1,000s of positional sources with zero overhead |
| Input | Unified abstraction for Touch, Mouse, and Keyboard. Event-driven and Query-based APIs |
| Assets | Web-first asset streaming. The engine runs before assets even load |
| Serialization | Binary serialization system with version upgrading |
| UI | High-speed, zero-garbage UI system. Optional—can be replaced with React/Vue if desired |
| Color Management | Scientific-grade color management toolkit, including spectral-integration tools and modern color spaces such as OKLab |
| NodeGraph | A building block for node-graph systems, such as shader editors and workflow engines |
| Achievements | State-of-the-art achievement system, using expressions and blackboards |
| Inverse Kinematics (IK) | Highly optimized FABRIK inverse kinematics solver even the most complex IK use cases |

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License & Copyright