Draw volumetric clouds, their shadows, a volumetric fog and catalogue stars from a new weather system in the GL 4.6 renderer

simulation/simulationenvironment.h

@@ -14,6 +14,7 @@ http://mozilla.org/MPL/2.0/.
 #include "environment/moon.h"
 #include "environment/stars.h"
 #include "environment/skydome.h"
+#include "environment/weather.h"
 #include "rendering/precipitation.h"
 #include "audio/sound.h"
 
@@ -62,6 +63,13 @@ public:
     inline auto const &
         wind_azimuth() const {
             return m_wind.azimuth; }
+    // clouds, fog and precipitation of the scenery, see environment/weather.h
+    inline auto const &
+        weather() const {
+            return m_weather; }
+    inline auto &
+        weather() {
+            return m_weather; }
 
 private:
 // types
@@ -87,6 +95,7 @@ private:
     basic_precipitation m_precipitation;
     sound_source m_rainsound { sound_placement::external, -1 };
     basic_wind m_wind;
+    world_weather m_weather;
 };
 
 namespace simulation {