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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | 1x 1x 1x 5x 17x 17x 17x 17x 10x 1x 9x 9x 5x 2x 2x 16x 9x 9x 16x 9x 9x 9x 9x 7x 7x 6x 7x 2x 1x | import { IScene } from "./components/scene.js";
import { IParent, Parent } from "./models/parent.js";
import { IFrameTime, FrameTime } from "./models/frameTime.js";
import { ISurfaceSettings } from "./controller/surface/surfaceSettings.js";
export interface IEngineLoop extends IParent<IScene> {
readonly isActive: boolean;
start(): void;
stop(): void;
}
export abstract class EngineLoop extends Parent<IScene> implements IEngineLoop {
private readonly _window: Window;
private readonly _surfaceSettings: ISurfaceSettings;
private _isActive: boolean;
public get isActive(): boolean {
return this._isActive;
}
public constructor(surfaceSettings: ISurfaceSettings, window: Window) {
super();
this._isActive = false;
this._window = window;
this._surfaceSettings = surfaceSettings;
}
public start(): void {
if (this._isActive) {
return;
}
this._isActive = true;
this.request(0);
}
public stop(): void {
this._isActive = false;
}
public override destroy(): void {
super.destroy();
this.stop();
}
private request(startTime: number): void {
const requestFrame = (endTime: number): void => {
const frameTime = new FrameTime(startTime, endTime);
this.loop(frameTime)
};
this._window.requestAnimationFrame(requestFrame);
}
private loop(frameTime: IFrameTime): void {
const surfaceSettings = this._surfaceSettings;
const expectedDelta = surfaceSettings.frameLimit > 0
? 1000 / surfaceSettings.frameLimit
: frameTime.delta;
const actualDelta = Math.round(expectedDelta - frameTime.delta);
if (actualDelta <= 0) {
this.children.forEach(scene => scene.update(frameTime));
if (this._isActive) {
this.request(frameTime.end);
}
return;
}
if (this._isActive) {
this.request(frameTime.start);
}
}
} |