add option for consistent stars in the sky

src/client/game.cpp

@@ -2850,7 +2850,7 @@ void Game::handleClientEvent_SetSky(ClientEvent *event, CameraOrientation *cam)
 		);
 	} else if (event->set_sky->type == "skybox" &&
 			event->set_sky->textures.size() == 6) {
-		// Disable the dyanmic mesh skybox:
+		// Disable the dynamic mesh skybox:
 		sky->setVisible(false);
 		// Set fog colors:
 		sky->setFallbackBgColor(event->set_sky->bgcolor);
@@ -2926,6 +2926,8 @@ void Game::handleClientEvent_SetStars(ClientEvent *event, CameraOrientation *cam
 	sky->setStarColor(event->star_params->starcolor);
 	sky->setStarScale(event->star_params->scale);
 	sky->setStarDayOpacity(event->star_params->day_opacity);
+	if (event->star_params->star_seed != 0)
+		sky->setStarSeed(event->star_params->star_seed);
 	delete event->star_params;
 }
 

src/client/sky.h

@@ -85,6 +85,7 @@ public:
 
 	// Set only from set_sky API
 	void setCloudsEnabled(bool clouds_enabled) { m_clouds_enabled = clouds_enabled; }
+	void setStarSeed(u64 star_seed) { m_seed = star_seed; }
 	void setFallbackBgColor(video::SColor fallback_bg_color)
 	{
 		m_fallback_bg_color = fallback_bg_color;

src/network/clientpackethandler.cpp

@@ -1445,6 +1445,7 @@ void Client::handleCommand_HudSetStars(NetworkPacket *pkt)
 	try {
 		*pkt >> stars.day_opacity;
 	} catch (PacketError &e) {};
+	*pkt >> stars.star_seed;
 
 	ClientEvent *event = new ClientEvent();
 	event->type        = CE_SET_STARS;

src/script/lua_api/l_object.cpp

@@ -2452,6 +2452,7 @@ int ObjectRef::l_set_stars(lua_State *L)
 			"scale", star_params.scale);
 		star_params.day_opacity = getfloatfield_default(L, 2,
 			"day_opacity", star_params.day_opacity);
+		star_params.star_seed = getintfield_default(L, 2, "star_seed", star_params.star_seed);
 	}
 
 	getServer(L)->setStars(player, star_params);

src/server.cpp

@@ -1953,7 +1953,7 @@ void Server::SendSetStars(session_t peer_id, const StarParams &params)
 
 	pkt << params.visible << params.count
 		<< params.starcolor << params.scale
-		<< params.day_opacity;
+		<< params.day_opacity << params.star_seed;
 
 	Send(&pkt);
 }

src/skyparams.h

@@ -64,6 +64,7 @@ struct StarParams
 	video::SColor starcolor;
 	f32 scale;
 	f32 day_opacity;
+	u64 star_seed;
 };
 
 struct CloudParams
@@ -142,6 +143,7 @@ public:
 		stars.starcolor = video::SColor(105, 235, 235, 255);
 		stars.scale = 1;
 		stars.day_opacity = 0;
+		stars.star_seed = 0;
 		return stars;
 	}