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Matter.js JavaScript Physics

⬢ NIVÅ 1Tekniskt
Grundläggande
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2 månader
Tid att lära sig
Lätt
Svårighetsgrad
10
Karriärer
I korthet

Matter.js is a JavaScript physics engine for 2D. You define bodies (circles, rectangles, polygons), set properties (mass, friction, restitution), and Matter.js simulates interactions: gravity pulls things down, bodies collide realistically, constraints keep things together. Use cases: games, interactive visualizations, educational simulations, physics demos. Mastery takes 3-4 weeks. Specialists earn 5-10% premium for interactive, engaging experiences. The skill sits between game development and web development.

Vad är Matter.js JavaScript Physics

Matter.js is a 2D rigid-body physics engine written in JavaScript. You create physics objects (bodies) with properties like mass, friction, and velocity. Matter.js simulates interactions: gravity, collisions, constraints (joints). You render bodies to Canvas or WebGL and users see realistic motion. A simple example: create a box (body), set gravity to 9.8 m/s², drop it. Matter.js computes position each frame. Box falls realistically, bounces off ground (if restitution > 0), gradually stops (if friction > 0).

🔧 VERKTYG & EKOSYSTEM
Matter.js libraryCanvas for renderingBabylon.js or Three.js for 3D (optional)Physics-based game enginesDebugging toolsPerformance profiling (Chrome DevTools)

💰 Lön per region

OmrådeNybörjareMidErfaren
USA$75k$115k$160k
UK£50k£75k£105k
EU€54k€82k€115k
CANADAC$72kC$110kC$155k

❓ Vanliga frågor

What's the difference between a physics engine and a game engine?
Physics engine: simulates realistic motion and collisions. Game engine: handles physics + rendering + audio + input + networking + etc. Matter.js is just physics. You provide rendering (Canvas, WebGL). You provide input handling. Full game engines (Godot, Unity) include everything.
Can I use Matter.js for 3D?
Matter.js is 2D only. For 3D physics: Cannon.js (physics) + Three.js/Babylon.js (rendering), or full 3D engines (Babylon.js, A-Frame). Matter.js is simpler but limited to 2D.
Is Matter.js suitable for games?
Yes, many indie games use Matter.js. It's not optimized for competitive e-sports (where performance matters), but for casual, puzzle, and physics-based games, it's solid. Good learning tool too.
How do I optimize performance for many bodies?
Broad-phase collision detection (spatial partitioning) reduces expensive narrow-phase checks. Matter.js includes broad-phase optimization. For 100s of bodies, performance drops. Consider pooling (reusing body objects) and removing off-screen bodies.
Can I export Matter.js simulations to other platforms?
Matter.js is JavaScript/browser-only. For native apps: rewrite in C#/C++, or use frameworks that run JavaScript (React Native, Flutter with JavaScript bridge). Web-based is easiest.

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