ts-game-engine/lib/Game.js

Simple WebGL game/render engine written in TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const GraphicsSystem_1 = require("./Systems/Graphics/GraphicsSystem");
const Materials_1 = require("./Materials");
const Texture2D_1 = require("./Textures/Texture2D");
const Settings_1 = require("./Settings");
const InputSystem_1 = require("./Systems/Input/InputSystem");
class Game {
    constructor(canvas) {
        this.Update = (now) => {
            if (!this.shouldUpdate)
                return;
            if (this.scene === undefined)
                return;
            if (this.initialTime < 0)
                this.initialTime = now;
            let elapsedMilliseconds = now - this.initialTime;
            let deltaTime = (elapsedMilliseconds - this.previousFrameElapsedMilliseconds) / 1000;
            this.previousFrameElapsedMilliseconds = elapsedMilliseconds;
            this.elapsedSeconds = elapsedMilliseconds / 1000;
            this.inputSystem.Update();
            this.scene.Update(deltaTime);
            this.graphicsSystem.Context.clear(WebGL2RenderingContext.COLOR_BUFFER_BIT | WebGL2RenderingContext.DEPTH_BUFFER_BIT);
            this.scene.Render();
            requestAnimationFrame(this.Update);
        };
        this.graphicsSystem = new GraphicsSystem_1.GraphicsSystem(canvas);
        this.inputSystem = new InputSystem_1.InputSystem(canvas);
        this.settings = new Settings_1.Settings();
        this.shouldUpdate = false;
        this.initialTime = -1;
        this.previousFrameElapsedMilliseconds = 0;
        this.elapsedSeconds = 0;
    }
    get GraphicsSystem() { return this.graphicsSystem; }
    get InputSystem() { return this.inputSystem; }
    get Settings() { return this.settings; }
    get Scene() { return this.scene; }
    get ElapsedSeconds() { return this.elapsedSeconds; }
    LoadScene(scene) {
        this.scene = scene;
        this.scene.Start();
        this.StartUpdating();
    }
    Dispose() {
        this.shouldUpdate = false;
        Materials_1.Shader.DisposeAll();
        Texture2D_1.Texture2D.DisposeAll();
        this.graphicsSystem.Dispose();
    }
    Resize(width, height) {
        var _a;
        this.graphicsSystem.Resize(width, height);
        (_a = this.scene) === null || _a === void 0 ? void 0 : _a.Resize(width, height);
    }
    StartUpdating() {
        if (this.shouldUpdate)
            return;
        this.shouldUpdate = true;
        requestAnimationFrame(this.Update);
    }
}
exports.Game = Game;