add 'thunder_rate' weather property

src/presets/WeatherPreset.cpp

@@ -23,6 +23,7 @@ dv::value WeatherPreset::serialize() const {
     root["fog_dencity"] = fogDencity;
     root["fog_curve"] = fogCurve;
     root["clouds"] = clouds;
+    root["thunder_rate"] = thunderRate;
 
     return root;
 }
@@ -49,4 +50,5 @@ void WeatherPreset::deserialize(const dv::value& src) {
     src.at("fog_dencity").get(fogDencity);
     src.at("fog_curve").get(fogCurve);
     src.at("clouds").get(clouds);
+    src.at("thunder_rate").get(thunderRate);
 }

src/presets/WeatherPreset.hpp

@@ -22,6 +22,7 @@ struct WeatherPreset : Serializable {
         /// @example if 0.8 then opacity range is 0.8-1.0 for 0.0-1.0 intensity
         float minOpacity = 0.0f;
         float maxOpacity = 1.0f;
+        /// @brief Clip texture by alpha channel
         bool opaque = false;
         /// @brief Fall splash
         std::optional<ParticlesPreset> splash;
@@ -37,7 +38,9 @@ struct WeatherPreset : Serializable {
     float fogCurve = 1.0f;
 
     float clouds = 0.0f;
-
+    
+    float thunderRate = 0.0f;
+    
     /// @brief Weather effects intensity
     float intensity = 1.0f;