Update(Thing): Rename flags

Author: smlu

libraries/libim/content/asset/thing/thing.h

@@ -40,15 +40,15 @@ namespace libim::content::asset {
             CogLinked               = 0x400,
             NoCrush                 = 0x800,
             NotInEasy               = 0x1000,     // unknown
-            NotInMedium             = 0x2000,     // unknown
+            Wood                    = 0x2000,     // thing is wood object
             HasShadow               = 0x4000,     // shadow on: 11_pyr_kidvsindy_2.cog, teo_introscene.cog, shs_ctladder.cog, pyr_openingcutscene.cog
             NotInMultiPlayer        = 0x8000,     // unknown
-            NotInSinglePlayer       = 0x10000,    // unknown
+            Snow                    = 0x10000,    // thing is snow object
             SendingPulseEvent       = 0x20000,    // sends pulse interval timeout event to its cog
             SendingTimerEvent       = 0x40000,    // sends timer timeout event to its cog
             Hidden                  = 0x80000,    // sol_transformer.cog, sol_redgem.cog, teo_pool.cog, teo_spiderblock.cog, vol_co-op_room.cog, pru_whipspike.cog ...
-            Metal                   = 0x400000,
-            Dirt                    = 0x800000,
+            Metal                   = 0x400000,   // thing is metal object
+            Earth                   = 0x800000,   // thing is earth (dirt) object
             Seen                    = 0x100000,   // mark Thing as seen by player. See: gen_bubblegen.cog, gen_watersplash.cog
             NoSounds                = 0x1000000,
             Underwater              = 0x2000000,  // swimming weap_machete.cog, teo_drops.cog, nub_lightning.cog, pru_caveamb.cog