From dc5136ca2156796811c9d6ca8d4244ce8e773e42 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Untersch=C3=BCtz?= <sebastian@unterschutz.de>
Date: Mon, 5 Jan 2026 19:54:07 +0100
Subject: [PATCH] Adjust physics constants for better 20 TPS gameplay feel,
 refine smoothing and correction thresholds, and update cache-busting version
 for client assets.

---
 cmd/client/game_render.go |   8 ++++----
 cmd/client/prediction.go  |   7 ++++---
 cmd/client/web/game.js    |   2 +-
 cmd/client/web/index.html |   2 +-
 cmd/client/web/main.wasm  | Bin 27717856 -> 27717856 bytes
 pkg/server/room.go        |   4 ++--
 6 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/cmd/client/game_render.go b/cmd/client/game_render.go
index db4c98d..e3a1089 100644
--- a/cmd/client/game_render.go
+++ b/cmd/client/game_render.go
@@ -84,8 +84,8 @@ func (g *Game) UpdateGame() {
 		// Lokale Physik sofort anwenden (Prediction)
 		g.ApplyInput(input)
 
-		// Sanfte Korrektur anwenden (schnellere Interpolation für weniger Ruckeln)
-		const smoothingFactor = 0.4 // Erhöht von 0.2 auf 0.4
+		// Sanfte Korrektur anwenden (langsamer bei 20 TPS für weniger Jitter)
+		const smoothingFactor = 0.15 // Reduziert für 20 TPS (war 0.4 bei 60 TPS)
 		if g.correctionX != 0 || g.correctionY != 0 {
 			g.predictedX += g.correctionX * smoothingFactor
 			g.predictedY += g.correctionY * smoothingFactor
@@ -93,8 +93,8 @@ func (g *Game) UpdateGame() {
 			g.correctionX *= (1.0 - smoothingFactor)
 			g.correctionY *= (1.0 - smoothingFactor)
 
-			// Korrektur beenden wenn sehr klein (kleinerer Threshold)
-			if g.correctionX*g.correctionX+g.correctionY*g.correctionY < 0.25 {
+			// Korrektur beenden wenn sehr klein
+			if g.correctionX*g.correctionX+g.correctionY*g.correctionY < 1.0 {
 				g.correctionX = 0
 				g.correctionY = 0
 			}
diff --git a/cmd/client/prediction.go b/cmd/client/prediction.go
index 3d0c4cb..7d15681 100644
--- a/cmd/client/prediction.go
+++ b/cmd/client/prediction.go
@@ -38,7 +38,7 @@ func (g *Game) ApplyInput(input InputState) {
 
 	// Sprung
 	if input.Jump && g.predictedGround {
-		g.predictedVY = -42.0 // war -14.0 bei 60 TPS (-14.0 * 3)
+		g.predictedVY = -30.0 // Reduziert für besseres Spielgefühl bei 20 TPS
 		g.predictedGround = false
 	}
 
@@ -114,8 +114,9 @@ func (g *Game) ReconcileWithServer(serverState game.PlayerState) {
 	diffX := replayX - g.predictedX
 	diffY := replayY - g.predictedY
 
-	// Nur korrigieren wenn Differenz signifikant (reduzierter Threshold für weniger Ruckeln)
-	const threshold = 2.0 // Reduziert von 5.0 auf 2.0
+	// Nur korrigieren wenn Differenz signifikant
+	// Bei 20 TPS größerer Threshold wegen größerer normaler Abweichungen
+	const threshold = 5.0 // Erhöht für 20 TPS (war 2.0)
 	if diffX*diffX+diffY*diffY > threshold*threshold {
 		// Speichere Korrektur für sanfte Interpolation
 		g.correctionX = diffX
diff --git a/cmd/client/web/game.js b/cmd/client/web/game.js
index ba4d6e9..038d271 100644
--- a/cmd/client/web/game.js
+++ b/cmd/client/web/game.js
@@ -234,7 +234,7 @@ window.onWasmReady = function() {
 };
 
 // Cache Management - Version wird bei jedem Build aktualisiert
-const CACHE_VERSION = 1767637179526; // Wird durch Build-Prozess ersetzt
+const CACHE_VERSION = 1767639190355; // Wird durch Build-Prozess ersetzt
 
 // Fetch mit Cache-Busting
 async function fetchWithCache(url) {
diff --git a/cmd/client/web/index.html b/cmd/client/web/index.html
index 2f2d503..9b73def 100644
--- a/cmd/client/web/index.html
+++ b/cmd/client/web/index.html
@@ -291,7 +291,7 @@
 <!-- WASM Execution -->
 <script>
     // Cache-Busting für JavaScript-Dateien (wird beim Build aktualisiert)
-    const BUILD_VERSION = 1767637179526;
+    const BUILD_VERSION = 1767639190355;
     document.write('<script src="wasm_exec.js?v=' + BUILD_VERSION + '"><\/script>');
     document.write('<script src="game.js?v=' + BUILD_VERSION + '"><\/script>');
 </script>
diff --git a/cmd/client/web/main.wasm b/cmd/client/web/main.wasm
index e3e9e3e842b6ce7df5368f4cdcff87c97887e85a..868162e94fd4122cda1c462cfbf3d70fc69b5088 100755
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diff --git a/pkg/server/room.go b/pkg/server/room.go
index aa62dcb..d585bb2 100644
--- a/pkg/server/room.go
+++ b/pkg/server/room.go
@@ -261,12 +261,12 @@ func (r *Room) HandleInput(input game.ClientInput) {
 	switch input.Type {
 	case "JUMP":
 		if p.OnGround {
-			p.VY = -42.0 // war -14.0 bei 60 TPS (-14.0 * 3)
+			p.VY = -30.0 // Reduziert für besseres Spielgefühl bei 20 TPS
 			p.OnGround = false
 			p.DoubleJumpUsed = false // Reset double jump on ground jump
 		} else if p.HasDoubleJump && !p.DoubleJumpUsed {
 			// Double Jump in der Luft
-			p.VY = -42.0 // war -14.0 bei 60 TPS (-14.0 * 3)
+			p.VY = -30.0 // Reduziert für besseres Spielgefühl bei 20 TPS
 			p.DoubleJumpUsed = true
 			log.Printf("⚡ %s verwendet Double Jump!", p.Name)
 		}