add WeatherPreset

src/presets/WeatherPreset.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "interfaces/Serializable.hpp"
+
+struct WeatherPreset : Serializable {
+    struct {
+        /// @brief Precipitation texture
+        std::string texture;
+        /// @brief Vertical speed
+        float vspeed = 1.0f;
+        /// @brief Max horizontal speed
+        float hspeed = 0.1f;
+        /// @brief UV scaling
+        float scale = 0.1f;
+    } fall {};
+
+    dv::value serialize() const override;
+    void deserialize(const dv::value& src) override;
+};