2d-physics-engine/dist/components/Rigidbody.component.js

A lightweight, flexible 2D physics engine with ECS architecture, built with TypeScript

import { Vector2 } from '../math/Vector2';
import { Component } from './Component.abstract';
export class Rigidbody extends Component {
    constructor(options) {
        super();
        Object.defineProperty(this, "componentId", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: Symbol('Rigidbody')
        });
        Object.defineProperty(this, "velocity", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: new Vector2()
        });
        Object.defineProperty(this, "angularVelocity", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: 0
        });
        Object.defineProperty(this, "forces", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: new Vector2()
        });
        Object.defineProperty(this, "torque", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: 0
        });
        Object.defineProperty(this, "mass", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: 1
        });
        Object.defineProperty(this, "inertia", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: this.mass * 0.5
        });
        Object.defineProperty(this, "restitution", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: 1
        });
        Object.defineProperty(this, "friction", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: 0.1
        });
        this.mass = options?.mass || this.mass;
        this.restitution = options?.restitution || this.restitution;
        this.friction = options?.friction || this.friction;
    }
    update() { }
    // Getters and setters for state
    getVelocity() {
        return this.velocity.clone();
    }
    setVelocity(velocity) {
        this.velocity = velocity.clone();
    }
    getAngularVelocity() {
        return this.angularVelocity;
    }
    setAngularVelocity(angularVelocity) {
        this.angularVelocity = angularVelocity;
    }
    getMass() {
        return this.mass;
    }
    getInverseMass() {
        return this.mass > 0 ? 1 / this.mass : 0;
    }
    getInertia() {
        return this.inertia;
    }
    // Force accumulation
    getAccumulatedForces() {
        return this.forces.clone();
    }
    getTorque() {
        return this.torque;
    }
    addForce(force) {
        this.forces = this.forces.add(force);
    }
    addTorque(torque) {
        this.torque += torque;
    }
    clearForces() {
        this.forces = new Vector2();
        this.torque = 0;
    }
    // Material properties
    getRestitution() {
        return this.restitution;
    }
    getFriction() {
        return this.friction;
    }
}
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