Sichtweite und Nebel hinzugefügt

blight-assets/src/main/resources/Shaders/BlightFog.frag

@@ -0,0 +1,37 @@
+#import "Common/ShaderLib/GLSLCompat.glsllib"
+
+uniform sampler2D m_Texture;
+uniform sampler2D m_DepthTexture;
+uniform vec4      m_FogColor;
+uniform float     m_FogDensity;
+uniform float     m_FogDistance;
+// Kamera-Frustum (near, far) — wird jeden Frame aus der echten Kamera gesetzt
+uniform vec2      m_FrustumNearFar;
+
+in vec2 texCoord;
+
+void main() {
+    vec4  sceneColor = texture2D(m_Texture,      texCoord);
+    float rawDepth   = texture2D(m_DepthTexture, texCoord).r;
+
+    // Sky-Pixel (Depth-Buffer = 1.0) nicht nebeln
+    if (rawDepth >= 1.0) {
+        gl_FragColor = sceneColor;
+        return;
+    }
+
+    float near = m_FrustumNearFar.x;
+    float far  = m_FrustumNearFar.y;
+
+    // Depth-Buffer [0,1] → echte Weltdistanz (Meter)
+    // Herleitung: z_view = near*far / (far - rawDepth*(far-near))
+    float linearDist = (near * far) / (far - rawDepth * (far - near));
+
+    // Normiert auf FogDistance; d=1 entspricht genau der eingestellten Nebel-Distanz
+    float d = linearDist / m_FogDistance;
+
+    // Exponential-squared fog (gleiche Formel wie JME FogFilter, korrekte Tiefe)
+    float fogFactor = clamp(exp2(-m_FogDensity * m_FogDensity * d * d * 1.4426950408), 0.0, 1.0);
+
+    gl_FragColor = mix(m_FogColor, sceneColor, fogFactor);
+}