add gfx.weather library & add weather.set command

src/logic/scripting/lua/libs/api_lua.hpp

@@ -46,6 +46,7 @@ extern const luaL_Reg utf8lib[];
 extern const luaL_Reg vec2lib[];  // vecn.cpp
 extern const luaL_Reg vec3lib[];  // vecn.cpp
 extern const luaL_Reg vec4lib[];  // vecn.cpp
+extern const luaL_Reg weatherlib[]; // gfx.weather
 extern const luaL_Reg worldlib[];
 
 // Components

src/logic/scripting/lua/libs/libweather.cpp

@@ -0,0 +1,16 @@
+#include "libhud.hpp"
+
+using namespace scripting;
+
+static int l_change(lua::State* L) {
+    WeatherPreset weather {};
+    weather.deserialize(lua::tovalue(L, 1));
+    float time = lua::tonumber(L, 2);
+    renderer->weather.change(std::move(weather), time);
+    return 0;
+}
+
+const luaL_Reg weatherlib[] = {
+    {"change", wrap_hud<l_change>},
+    {NULL, NULL}
+};

src/logic/scripting/scripting_hud.cpp

@@ -36,6 +36,7 @@ void scripting::on_frontend_init(Hud* hud, WorldRenderer* renderer) {
     lua::openlib(L, "gfx", "blockwraps", blockwrapslib);
     lua::openlib(L, "gfx", "particles", particleslib);
     lua::openlib(L, "gfx", "text3d", text3dlib);
+    lua::openlib(L, "gfx", "weather", weatherlib);
 
     load_script("hud_classes.lua");