From 560a638eb6da368ea2f797ba4a73bd0ca7989cb6 Mon Sep 17 00:00:00 2001
From: Cametendo <cameronmathis08@gmail.com>
Date: Mon, 1 Jun 2026 10:39:33 +0200
Subject: [PATCH] Getting maybe closer to kuwahara

---
 shaders/final.fsh | 46 ++++++++++++++++++++++++++--------------------
 1 file changed, 26 insertions(+), 20 deletions(-)

diff --git a/shaders/final.fsh b/shaders/final.fsh
index 29f41b0..9854d29 100644
--- a/shaders/final.fsh
+++ b/shaders/final.fsh
@@ -30,9 +30,9 @@ void main() {
             lumaSquaredSum_tr += (luma * luma);
         }
     }
-    vec3 mean_tr = colorSum_tr / 9.0;
-    float mean_luma_tr = lumaSum_tr / 9.0;
-    float variance_tr = (lumaSquaredSum_tr / 9.0) - (mean_luma_tr * mean_luma_tr);
+    vec3 mean_tr = colorSum_tr / 25.0;
+    float mean_luma_tr = lumaSum_tr / 25.0;
+    float variance_tr = (lumaSquaredSum_tr / 25.0) - (mean_luma_tr * mean_luma_tr);
 
     // =========================================================================
     // QUADRANT 2: Oben-Links (Top-Left)
@@ -52,9 +52,9 @@ void main() {
             lumaSquaredSum_tl += (luma * luma);
         }
     }
-    vec3 mean_tl = colorSum_tl / 9.0;
-    float mean_luma_tl = lumaSum_tl / 9.0;
-    float variance_tl = (lumaSquaredSum_tl / 9.0) - (mean_luma_tl * mean_luma_tl);
+    vec3 mean_tl = colorSum_tl / 25.0;
+    float mean_luma_tl = lumaSum_tl / 25.0;
+    float variance_tl = (lumaSquaredSum_tl / 25.0) - (mean_luma_tl * mean_luma_tl);
 
     // =========================================================================
     // QUADRANT 3: Unten-Links (Bottom-Left)
@@ -74,9 +74,9 @@ void main() {
             lumaSquaredSum_bl += (luma * luma);
         }
     }
-    vec3 mean_bl = colorSum_bl / 9.0;
-    float mean_luma_bl = lumaSum_bl / 9.0;
-    float variance_bl = (lumaSquaredSum_bl / 9.0) - (mean_luma_bl * mean_luma_bl);
+    vec3 mean_bl = colorSum_bl / 25.0;
+    float mean_luma_bl = lumaSum_bl / 25.0;
+    float variance_bl = (lumaSquaredSum_bl / 25.0) - (mean_luma_bl * mean_luma_bl);
 
     // =========================================================================
     // QUADRANT 4: Unten-Rechts (Bottom-Right)
@@ -96,29 +96,35 @@ void main() {
             lumaSquaredSum_br += (luma * luma);
         }
     }
-    vec3 mean_br = colorSum_br / 9.0;
-    float mean_luma_br = lumaSum_br / 9.0;
-    float variance_br = (lumaSquaredSum_br / 9.0) - (mean_luma_br * mean_luma_br);
+    vec3 mean_br = colorSum_br / 25.0;
+    float mean_luma_br = lumaSum_br / 25.0;
+    float variance_br = (lumaSquaredSum_br / 25.0) - (mean_luma_br * mean_luma_br);
 
     // =========================================================================
     // FINALE AUSWAHL: Den Quadranten mit der NIEDRIGSTEN Varianz finden
     // =========================================================================
-    float minVariance = variance_tr;
+// 1. Varianzen direkt für den harten Effekt quadrieren
+    float v_tr = variance_tr * variance_tr;
+    float v_tl = variance_tl * variance_tl;
+    float v_bl = variance_bl * variance_bl;
+    float v_br = variance_br * variance_br;
+
+    // 2. Sauberer Vergleich der quadrierten Werte
+    float minVariance = v_tr;
     vec3 finalColor = mean_tr;
 
-    if (variance_tl < minVariance) {
-        minVariance = variance_tl;
+    if (v_tl < minVariance) {
+        minVariance = v_tl;
         finalColor = mean_tl;
     }
-    if (variance_bl < minVariance) {
-        minVariance = variance_bl;
+    if (v_bl < minVariance) {
+        minVariance = v_bl;
         finalColor = mean_bl;
     }
-    if (variance_br < minVariance) {
-        minVariance = variance_br;
+    if (v_br < minVariance) {
+        minVariance = v_br;
         finalColor = mean_br;
     }
 
-    // Farbe auf den Bildschirm bringen!
     fragColor = vec4(finalColor, 1.0);
 }
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