Orion ECS

Orion ECS is a lightweight and flexible Entity Component System (ECS) framework written in JavaScript. It provides a solid foundation for building games and other applications that can benefit from a component-based architecture.

Features

• Simple and intuitive API
• Efficient entity and component management
• Flexible system creation and execution
• Easy to integrate with existing projects

Installation

You can install Orion ECS using npm:

npm install orion-ecs

Usage

Here's a basic example of how to use Orion ECS:

import { Engine } from 'orion-ecs';

// Create a new engine
const game = new Engine();

// Define components
class Position {
  constructor(x = 0, y = 0) {
    this.x = x;
    this.y = y;
  }
}

class Velocity {
  constructor(x = 0, y = 0) {
    this.x = x;
    this.y = y;
  }
}

// Create a system
game.createSystem([Position, Velocity], {
  act: function(entity, [position, velocity]) {
    position.x += velocity.x;
    position.y += velocity.y;
  }
});

// Create an entity and add components
const entity = game.createEntity();
entity.addComponent(new Position(0, 0));
entity.addComponent(new Velocity(1, 1));

// Run the engine
game.run(16, 0); // Run every 16ms, indefinitely

API Reference

Engine

• createEntity(): Creates and returns a new entity
• createSystem(components, options): Creates a new system
• run(interval, maxSteps): Runs the engine
• perform(): Performs a single step of the engine

Entity

• addComponent(component): Adds a component to the entity
• removeComponent(componentName): Removes a component from the entity
• hasComponent(componentName): Checks if the entity has a specific component

System

Systems are created using the createSystem method of the engine. The options object can include:

• before(): Function called before processing entities
• act(entity, ...components): Function called for each matching entity
• after(): Function called after processing entities

Testing

To run the tests:

npm test

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.