- added option to show hub and episode names on the alt HUD.

Still very much work in progress because few mods have set this up.
CVARs default to off and are not exposed to the menu.

src/g_level.cpp

@@ -85,6 +85,7 @@
 #include "c_buttons.h"
 #include "screenjob.h"
 #include "types.h"
+#include "gstrings.h"
 
 #include "gi.h"
 
@@ -101,6 +102,7 @@
 
 void STAT_StartNewGame(const char *lev);
 void STAT_ChangeLevel(const char *newl, FLevelLocals *Level);
+FString STAT_EpisodeName();
 
 EXTERN_CVAR(Bool, save_formatted)
 EXTERN_CVAR (Float, sv_gravity)
@@ -2430,3 +2432,31 @@ void FLevelLocals::SetMusic()
 {
 	S_ChangeMusic(Music, musicorder);
 }
+
+
+DEFINE_ACTION_FUNCTION(FLevelLocals, GetClusterName)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(FLevelLocals)
+	cluster_info_t* cluster = FindClusterInfo(self->cluster);
+	FString retval;
+
+	if (cluster)
+	{
+		if (cluster->flags & CLUSTER_LOOKUPNAME)
+			retval = GStrings(cluster->ClusterName);
+		else
+			retval = cluster->ClusterName;
+	}
+	ACTION_RETURN_STRING(retval);
+}
+
+DEFINE_ACTION_FUNCTION(FLevelLocals, GetEpisodeName)
+{
+	// this is a bit of a crapshoot because ZDoom never assigned a level to an episode
+	// and retroactively fixing this is not possible.
+	// This will need some heuristics to assign a proper episode to each existing level.
+	// Stuff for later. for now this just checks the STAT module for the currently running episode,
+	// which should be fine unless cheating.
+	ACTION_RETURN_STRING(GStrings.localize(STAT_EpisodeName()));
+}
+