feat(game/mp/slime): add speed multiplier options

Author: theonlypwner

docs/pages/game/slime.html

@@ -1,7 +1,7 @@
 ---
 title: Slime Volleyball Multiplayer
 date: "2017-05-09 22:33:05 -0600"
-mdate: 2025-12-28 18:00:00 -0700
+mdate: 2025-12-29 17:00:00 -0700
 entry: app_game_mp_slime
 ---
 {% import 'game.html' as game %}

docs/pages/game/slime_rules.html

@@ -1,7 +1,7 @@
 ---
 title: Slime Volleyball Multiplayer Rules
 date: "2025-12-27 20:00:00 -0700"
-mdate: 2025-12-28 16:00:00 -0700
+mdate: 2025-12-29 17:00:00 -0700
 ---
 {% import 'game.html' as game %}
 {{ game.tab(page_url, 'slime') }}
@@ -19,7 +19,6 @@ <h1>Future features</h1>
   <ul>
     <li>Bots
     <li>Client-side Prediction (Extrapolation, and possibly interpolation)
-    <li>Options for game speed, player speed, ball speed, and gravity
   </ul>
 </p>
 
@@ -36,3 +35,15 @@ <h2>Serve</h2>
 
 <h2>Intermission Time / s <small>(default: 1, min: 0, max: 3)</small></h2>
 <p>Time between rounds after a point is scored.</p>
+
+<h2>Game Speed <small>(default: 100%, min: 0.25, max: 8)</small></h2>
+<p>The game speed is multiplied by this factor.</p>
+
+<h2>Player Speed <small>(default: 1, min: 0.25, max: 8)</small></h2>
+<p>The player speed is multiplied by this factor.</p>
+
+<h2>Ball Speed <small>(default: 1, min: 0.10, max: 8)</small></h2>
+<p>The ball speed is multiplied by this factor.</p>
+
+<h2>Gravity <small>(default: 1, min: 0.10, max: 8)</small></h2>
+<p>The gravity is multiplied by this factor.</p>

scripts/game/mp/slime/SlimeGame.svelte.ts

@@ -1,4 +1,4 @@
-import { formatHexColor } from '@/util'
+import { clamp, formatHexColor } from '@/util'
 import { ByteReader } from '@gmc/game/ByteReader'
 import { filterChat } from '@gmc/game/CommonGame.svelte'
 import { RealTimeClient, RealTimeGame } from '@gmc/game/RealTimeGame.svelte'
@@ -166,6 +166,10 @@ export class SlimeGame extends RealTimeGame<SlimeClient> {
   protected override processWelcomeMode (m: ByteReader): void {
     this.mode.optServe = m.get() & 3 // 2 bits exactly
     this.mode.optIntermission = Math.min(Number(m.getUint64()), 3000)
+    this.mode.optGameSpeed = clamp(m.get(), 25, 800)
+    this.mode.optPlayerSpeed = clamp(m.get(), 25, 800)
+    this.mode.optBallSpeed = clamp(m.get(), 10, 800)
+    this.mode.optGravity = clamp(m.get(), 10, 800)
   }
 
   protected override processRoundInfo (m: ByteReader): void {

scripts/game/mp/slime/gamemode.ts

@@ -9,6 +9,10 @@ export const roomCreateOptions = [
     'random'
   ]],
   ['optIntermission', 'i', 1000, 'Intermission Time / ms', 'time after round ends, in milliseconds', 0, 3000],
+  ['optGameSpeed', 'i', 100, 'Game Speed / %', 'game speed multiplier', 25, 800],
+  ['optPlayerSpeed', 'i', 100, 'Player Speed / %', 'player speed multiplier', 25, 800],
+  ['optBallSpeed', 'i', 100, 'Ball Speed / %', 'ball speed multiplier', 10, 800],
+  ['optGravity', 'i', 100, 'Gravity / %', 'gravity multiplier', 10, 800],
 ] as const
 
 export type SlimeMode = GamemodeFromOptions<typeof roomCreateOptions>
@@ -18,5 +22,10 @@ export function defaultMode (): SlimeMode {
 }
 
 export function getGameModeString (mode: SlimeMode): string {
-  return `${['alternate', 'winner', 'loser', 'random'][mode.optServe]} serve, ${mode.optIntermission / 1000}s intermission`
+  return `${['alternate', 'winner', 'loser', 'random'][mode.optServe]} serve`
+    + `, ${mode.optIntermission / 1000}s intermission`
+    + `, (${mode.optGameSpeed / 100}x game`
+    + `, ${mode.optPlayerSpeed / 100}x player`
+    + `, ${mode.optBallSpeed / 100}x ball) speed`
+    + `, ${mode.optGravity / 100}x gravity`
 }