day-night loop, dynamic skybox, clock on debug panel

src/world/World.cpp

@@ -29,6 +29,11 @@ World::~World(){
 	delete wfile;
 }
 
+void World::updateTimers(float delta) {
+	daytime += delta * daytimeSpeed;
+	daytime = fmod(daytime, 1.0f);
+}
+
 void World::write(Level* level) {
 	const Content* content = level->content;
 
@@ -41,15 +46,17 @@ void World::write(Level* level) {
 		wfile->put(chunk.get());
 	}
 
-	wfile->write(WorldInfo {name, wfile->directory, seed}, content);
+	wfile->write(WorldInfo {name, wfile->directory, seed, daytime, daytimeSpeed}, content);
 	wfile->writePlayer(level->player);
 }
 
 Level* World::load(EngineSettings& settings, const Content* content) {
-	WorldInfo info {name, wfile->directory, seed};
+	WorldInfo info {name, wfile->directory, seed, daytime, daytimeSpeed};
 	wfile->readWorldInfo(info);
 	seed = info.seed;
 	name = info.name;
+	daytime = info.daytime;
+	daytimeSpeed = info.daytimeSpeed;
 
 	vec3 playerPosition = vec3(0, 100, 0);
 	Camera* camera = new Camera(playerPosition, glm::radians(90.0f));

src/world/World.h

@@ -5,6 +5,7 @@
 #include <filesystem>
 #include "../typedefs.h"
 #include "../settings.h"
+#include "../util/timeutil.h"
 
 class Content;
 class WorldFiles;
@@ -18,12 +19,20 @@ public:
 	WorldFiles* wfile;
 	uint64_t seed;
 
+	/* Day/night loop timer in range 0..1 
+	   0.0 - is midnight
+	   0.5 - is noon
+	*/
+	float daytime = timeutil::time_value(10, 00, 00);
+	float daytimeSpeed = 1.0f/60.0f/24.0f;
+
 	World(std::string name, 
 		  std::filesystem::path directory, 
 		  uint64_t seed, 
 		  EngineSettings& settings);
 	~World();
 
+	void updateTimers(float delta);
 	void write(Level* level);
 	Level* load(EngineSettings& settings, const Content* content);
 };