From 3d9e42efca8792bcfa1be7bd6125cf732db50fdb Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Wed, 10 Jan 2024 11:38:49 +0900
Subject: enhance(drop-and-fusion): リプレイの倍速再生対応
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---
 .../frontend/src/scripts/drop-and-fusion-engine.ts | 79 +++++++++++-----------
 1 file changed, 41 insertions(+), 38 deletions(-)

(limited to 'packages/frontend/src/scripts')

diff --git a/packages/frontend/src/scripts/drop-and-fusion-engine.ts b/packages/frontend/src/scripts/drop-and-fusion-engine.ts
index 16fe87d97a..a59eb271ec 100644
--- a/packages/frontend/src/scripts/drop-and-fusion-engine.ts
+++ b/packages/frontend/src/scripts/drop-and-fusion-engine.ts
@@ -44,7 +44,7 @@ export class DropAndFusionGame extends EventEmitter<{
 	gameOver: () => void;
 }> {
 	private PHYSICS_QUALITY_FACTOR = 16; // 低いほどパフォーマンスが高いがガタガタして安定しなくなる、逆に高すぎても何故か不安定になる
-	private COMBO_INTERVAL = 1000;
+	private COMBO_INTERVAL = 60; // frame
 	public readonly DROP_INTERVAL = 500;
 	public readonly PLAYAREA_MARGIN = 25;
 	private STOCK_MAX = 4;
@@ -76,7 +76,7 @@ export class DropAndFusionGame extends EventEmitter<{
 	private latestDroppedBodyId: Matter.Body['id'] | null = null;
 
 	private latestDroppedAt = 0;
-	private latestFusionedAt = 0;
+	private latestFusionedAt = 0; // frame
 	private stock: { id: string; mono: Mono }[] = [];
 	private holding: { id: string; mono: Mono } | null = null;
 
@@ -100,6 +100,8 @@ export class DropAndFusionGame extends EventEmitter<{
 
 	private comboIntervalId: number | null = null;
 
+	public replayPlaybackRate = 1;
+
 	constructor(opts: {
 		canvas: HTMLCanvasElement;
 		width: number;
@@ -219,13 +221,12 @@ export class DropAndFusionGame extends EventEmitter<{
 	}
 
 	private fusion(bodyA: Matter.Body, bodyB: Matter.Body) {
-		const now = Date.now();
-		if (this.latestFusionedAt > now - this.COMBO_INTERVAL) {
+		if (this.latestFusionedAt > this.frame - this.COMBO_INTERVAL) {
 			this.combo++;
 		} else {
 			this.combo = 1;
 		}
-		this.latestFusionedAt = now;
+		this.latestFusionedAt = this.frame;
 
 		// TODO: 単に位置だけでなくそれぞれの動きベクトルも融合する？
 		const newX = (bodyA.position.x + bodyB.position.x) / 2;
@@ -390,44 +391,43 @@ export class DropAndFusionGame extends EventEmitter<{
 			}
 		});
 
-		this.comboIntervalId = window.setInterval(() => {
-			if (this.latestFusionedAt < Date.now() - this.COMBO_INTERVAL) {
-				this.combo = 0;
-			}
-		}, 500);
-
 		if (logs) {
 			const playTick = () => {
-				this.frame++;
-				const log = logs.find(x => x.frame === this.frame - 1);
-				if (log) {
-					switch (log.operation) {
-						case 'drop': {
-							this.drop(log.x);
-							break;
-						}
-						case 'hold': {
-							this.hold();
-							break;
-						}
-						case 'surrender': {
-							this.surrender();
-							break;
-						}
-						default:
-							break;
+				for (let i = 0; i < this.replayPlaybackRate; i++) {
+					this.frame++;
+					if (this.latestFusionedAt < this.frame - this.COMBO_INTERVAL) {
+						this.combo = 0;
 					}
-				}
-				this.tickCallbackQueue = this.tickCallbackQueue.filter(x => {
-					if (x.frame === this.frame) {
-						x.callback();
-						return false;
-					} else {
-						return true;
+					const log = logs.find(x => x.frame === this.frame - 1);
+					if (log) {
+						switch (log.operation) {
+							case 'drop': {
+								this.drop(log.x);
+								break;
+							}
+							case 'hold': {
+								this.hold();
+								break;
+							}
+							case 'surrender': {
+								this.surrender();
+								break;
+							}
+							default:
+								break;
+						}
 					}
-				});
+					this.tickCallbackQueue = this.tickCallbackQueue.filter(x => {
+						if (x.frame === this.frame) {
+							x.callback();
+							return false;
+						} else {
+							return true;
+						}
+					});
 
-				Matter.Engine.update(this.engine, this.TICK_DELTA);
+					Matter.Engine.update(this.engine, this.TICK_DELTA);
+				}
 
 				if (!this.isGameOver) {
 					this.tickRaf = window.requestAnimationFrame(playTick);
@@ -446,6 +446,9 @@ export class DropAndFusionGame extends EventEmitter<{
 
 	private tick() {
 		this.frame++;
+		if (this.latestFusionedAt < this.frame - this.COMBO_INTERVAL) {
+			this.combo = 0;
+		}
 		this.tickCallbackQueue = this.tickCallbackQueue.filter(x => {
 			if (x.frame === this.frame) {
 				x.callback();
-- 
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