@dominicstop/utils/lib/module/physics/OfflineSimulation.js

Yet another event emitter written in typescript.

export class OfflineSimulation {
    constructor(engine, fixedDeltaTime = 1 / 60) {
        this.isRunning = false;
        this._totalSimulatedTime = 0;
        this._iterationCount = 0;
        this.maxIterations = 200;
        this.onPreStep = null;
        this.onPostStep = null;
        this.onUpdate = null;
        this.engine = engine;
        this.fixedDeltaTimeSeconds = fixedDeltaTime;
    }
    get totalSimulatedTime() {
        return this._totalSimulatedTime;
    }
    get iterationCount() {
        return this._iterationCount;
    }
    run() {
        this.isRunning = true;
        this._iterationCount = 0;
        while (this.isRunning && this._iterationCount < this.maxIterations) {
            this.step();
            this._iterationCount++;
            this.onUpdate?.();
            if (this.isStable()) {
                this.isRunning = false;
            }
        }
    }
    ;
    step() {
        this.onPreStep?.(this.fixedDeltaTimeSeconds);
        this.engine.update(this.fixedDeltaTimeSeconds);
        this.onPostStep?.(this.fixedDeltaTimeSeconds);
        this._totalSimulatedTime += this.fixedDeltaTimeSeconds;
    }
    reset() {
        this.isRunning = false;
        this.engine.clear();
        this._totalSimulatedTime = 0;
        this._iterationCount = 0;
    }
    addParticle(particle) {
        this.engine.addParticle(particle);
    }
    addForce(force) {
        this.engine.addForce(force);
    }
    isStable() {
        // Placeholder: Replace with actual stability logic
        return this.engine.particles.every(p => p.checkIsAtRest());
    }
}