add fog_curve parameter & update shaders

src/presets/WeatherPreset.cpp

@@ -18,6 +18,7 @@ dv::value WeatherPreset::serialize() const {
 
     root["fog_opacity"] = fogOpacity;
     root["fog_dencity"] = fogDencity;
+    root["fog_curve"] = fogCurve;
     root["clouds"] = clouds;
 
     return root;
@@ -40,5 +41,6 @@ void WeatherPreset::deserialize(const dv::value& src) {
     }
     src.at("fog_opacity").get(fogOpacity);
     src.at("fog_dencity").get(fogDencity);
+    src.at("fog_curve").get(fogCurve);
     src.at("clouds").get(clouds);
 }

src/presets/WeatherPreset.hpp

@@ -31,10 +31,13 @@ struct WeatherPreset : Serializable {
     /// @brief Weather fog depth multiplier
     float fogDencity = 2.0f;
 
+    /// @brief Weather fog curve
+    float fogCurve = 0.5f;
+
     float clouds = 0.5f;
 
     /// @brief Weather effects intensity
-    float intensity = 0.9f;
+    float intensity = 1.0f;
 
     dv::value serialize() const override;
     void deserialize(const dv::value& src) override;