Mapbase v5.1

- Fixed a major oversight in Source 2013 which was causing some code to think all logic entities were worldspawn
- Added WIP background nodraw for point_cameras set to not draw skybox at all
- Fixed map-specific talker not flushing on restore
- Added optional HUD hint to code-based game instructor hints
- Added workaround for suspicious crashes in HL2 NPC rappelling code (reported by 1upD)
- Made antlions summoned by npc_antlionguard report as dead when removed with the "Kill" input
- Fixed math_mod not saving mod value (reported by Klems)
- Added SDK_WindowImposter, which uses the SteamPipe cubemap bug workaround and includes support for parallax corrected cubemaps
- Updated thirdpartylegalnotices.txt to mention the Squirrel API
- Fixed incorrect type checking for script instances in VScript
- Added a bunch of new misc. VScript constants
- Added a few new base VScript functions
- Added a separate "Clientside Script Language" keyvalue to worldspawn for VScript, allowing client scripts to use a different language from server scripts
- Fixed worldspawn crashing the game when running entity scripts (reported by krassell)
- Fixed manifests creating a second worldspawn, allowing them to function properly in HL2
- Added tons of remapping-related fixes for instances and manifests, including node IDs and overlay remapping
- Added a keyvalue to func_instance which allows vector axis lines to be remapped properly
- Added support for manifest root path instances in VBSP
- Added missing PrintBrushContents() contents to VBSP
- Added -nohiddenmaps parameter
- Made manifest cordon somewhat functional

sp/src/game/server/baseentity.h

@@ -85,6 +85,7 @@ typedef struct KeyValueData_s KeyValueData;
 class CUserCmd;
 class CSkyCamera;
 class CEntityMapData;
+class CWorld;
 class INextBot;
 
 
@@ -1059,7 +1060,7 @@ public:
 	virtual INextBot		*MyNextBotPointer( void ) { return NULL; }
 	virtual float			GetDelay( void ) { return 0; }
 	virtual bool			IsMoving( void );
-	bool					IsWorld() { return entindex() == 0; }
+	bool					IsWorld() const { extern CWorld *g_WorldEntity; return (void *)this == (void *)g_WorldEntity; } // Ported from the Alien Swarm SDK to fix false IsWorld() positives on server-only entities
 	virtual char const		*DamageDecal( int bitsDamageType, int gameMaterial );
 	virtual void			DecalTrace( trace_t *pTrace, char const *decalName );
 	virtual void			ImpactTrace( trace_t *pTrace, int iDamageType, const char *pCustomImpactName = NULL );