orion-engine/lib/time.js

A simple and lightweight web based game development library

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Time = void 0;
class Time {
    _is_running = false;
    _last_time = 0;
    _pause_time = 0;
    _delta_time = 0;
    _time_scale = 1.0;
    _elapsed_time = 0;
    _current_time = 0;
    constructor(start_time_on_creation = true) {
        if (start_time_on_creation) {
            this.start();
        }
    }
    get delta_time() {
        return this._delta_time;
    }
    get time_scale() {
        return this._time_scale;
    }
    set time_scale(value) {
        this._time_scale = value;
    }
    get elapsed_time() {
        return this._elapsed_time;
    }
    get current_time() {
        return this._current_time;
    }
    /**
     * Starts the time system.
     */
    start() {
        this._is_running = true;
        this._last_time = performance.now();
        this._pause_time = 0;
        this._delta_time = 0;
        this._time_scale = 1.0;
        this._elapsed_time = 0;
        this._current_time = 0;
    }
    /**
     * Pauses the time system.
     */
    pause() {
        if (this._is_running) {
            this._is_running = false;
            this._pause_time = performance.now();
        }
    }
    /**
     * Resumes the time system.
     */
    resume() {
        if (!this._is_running) {
            this._is_running = true;
            this._last_time += performance.now() - this._pause_time;
        }
    }
    /**
     * Updates the time system.
     */
    update() {
        if (!this._is_running) {
            return;
        }
        const now = performance.now();
        this._delta_time = ((now - this._last_time) / 1000) * this._time_scale;
        this._elapsed_time += this._delta_time;
        this._current_time = this._elapsed_time * 1000;
        this._last_time = now;
    }
}
exports.Time = Time;