Heretic: Added map info flag "mif_dim_torch"

Setting the "mif_dim_torch" flag causes the Torch artifact to be rendered like in Hexen so that the light attenuates by distance from the viewer.

doomsday/apps/api/def_share.h

@@ -118,6 +118,7 @@ typedef struct {
 #define MIF_NO_INTERMISSION     0x4  ///< Skip any intermission between maps.
 #define MIF_LIGHTNING           0x8  ///< Lightning is used in the map.
 #define MIF_SPAWN_ALL_FIREMACES 0x10 ///< Heretic: Spawn all firemaces (disable randomness).
+#define MIF_DIM_TORCH           0x20 ///< Heretic: Use the attenuated torch (not fullbright).
 ///@}
 
 #define DDLT_MAX_APARAMS    10

doomsday/apps/libdoomsday/net.dengine.base.pack/defs/flags.ded

@@ -71,6 +71,7 @@ Flag { ID = "mif_sphere"; Value = 0x2; } # Draw the sky sphere even when models
 Flag { ID = "mif_nointermission"; Value = 0x4; }
 Flag { ID = "mif_lightning"; Value = 0x8; }
 Flag { ID = "mif_spawn_all_firemaces"; Value = 0x10; }
+Flag { ID = "mif_dim_torch"; Value = 0x20; }
 
 # Sky Info
 Flag { ID = "sif_sphere"; Value = 0x1; } # Draw the sky sphere even when models are in use.

doomsday/apps/plugins/common/src/world/p_mapsetup.cpp

@@ -990,6 +990,11 @@ void P_FinalizeMapChange(uri_s const *mapUri_)
 #endif
 #if __JHERETIC__
     P_TurnGizmosAwayFromDoors();
+
+    // Torch rendering mode for the map. By default (vanilla), Heretic has a
+    // fullbright torch.
+    DD_SetInteger(DD_FIXEDCOLORMAP_ATTENUATE,
+                  (gfw_Session()->mapInfo().geti("flags") & MIF_DIM_TORCH) != 0);
 #endif
 }