Merge pull request #1526 from sphericalice/doc-curtain-special

Document the CloseBattlePikeCurtain special

include/constants/metatile_labels.h

@@ -352,6 +352,7 @@
 #define METATILE_InsideShip_IntactDoor_Bottom_Interior 0x297
 
 // gTileset_BattlePike
+#define METATILE_BattlePike_CurtainFrames_Start  0x201
 #define METATILE_BattlePike_Curtain_Stage0_Tile0 0x24A
 #define METATILE_BattlePike_Curtain_Stage0_Tile1 0x251
 #define METATILE_BattlePike_Curtain_Stage0_Tile2 0x252

include/global.fieldmap.h

@@ -11,6 +11,11 @@
 
 #define METATILE_ID(tileset, name) (METATILE_##tileset##_##name)
 
+// Rows of metatiles do not actually have a strict width.
+// This constant is used for calculations for finding the next row of metatiles
+// for constructing large tiles, such as the Battle Pike's curtain tile.
+#define METATILE_ROW_WIDTH 8
+
 enum
 {
     CONNECTION_INVALID = -1,