Document the CloseBattlePikeCurtain special

1 files changed, 23 insertions, 11 deletions

diff --git a/src/field_specials.c b/src/field_specials.c
index ab02f9938..17790532b 100644
--- a/src/field_specials.c
+++ b/src/field_specials.c
@@ -3931,13 +3931,18 @@ static void Task_LoopWingFlapSE(u8 taskId)
 #undef playCount
 #undef delay
 
+#define CURTAIN_HEIGHT 4
+#define CURTAIN_WIDTH 3
+#define tFrameTimer   data
+#define tCurrentFrame data[3]
+
 void CloseBattlePikeCurtain(void)
 {
     u8 taskId = CreateTask(Task_CloseBattlePikeCurtain, 8);
-    gTasks[taskId].data[0] = 4;
-    gTasks[taskId].data[1] = 4;
-    gTasks[taskId].data[2] = 4;
-    gTasks[taskId].data[3] = 0;
+    gTasks[taskId].tFrameTimer[0] = 4;
+    gTasks[taskId].tFrameTimer[1] = 4;
+    gTasks[taskId].tFrameTimer[2] = 4;
+    gTasks[taskId].tCurrentFrame = 0;
 }
 
 static void Task_CloseBattlePikeCurtain(u8 taskId)
@@ -3945,19 +3950,21 @@ static void Task_CloseBattlePikeCurtain(u8 taskId)
     u8 x, y;
     s16 *data = gTasks[taskId].data;
 
-    data[data[3]]--;
-    if (data[data[3]] == 0)
+    tFrameTimer[tCurrentFrame]--;
+    if (tFrameTimer[tCurrentFrame] == 0)
     {
-        for (y = 0; y < 4; y++)
+        for (y = 0; y < CURTAIN_HEIGHT; y++)
         {
-            for (x = 0; x < 3; x++)
+            for (x = 0; x < CURTAIN_WIDTH; x++)
             {
-                MapGridSetMetatileIdAt(gSaveBlock1Ptr->pos.x + x + 6, gSaveBlock1Ptr->pos.y + y + 4, x + 513 + y * 8 + data[3] * 32);
+                MapGridSetMetatileIdAt(gSaveBlock1Ptr->pos.x + x + MAP_OFFSET - 1,
+                                       gSaveBlock1Ptr->pos.y + y + MAP_OFFSET - 3,
+                                       (x + METATILE_BattlePike_CurtainFrames_Start) + (y * TILESET_WIDTH) + (tCurrentFrame * CURTAIN_HEIGHT * TILESET_WIDTH));
             }
         }
         DrawWholeMapView();
-        data[3]++;
-        if (data[3] == 3)
+        tCurrentFrame++;
+        if (tCurrentFrame == 3)
         {
             DestroyTask(taskId);
             EnableBothScriptContexts();
@@ -3965,6 +3972,11 @@ static void Task_CloseBattlePikeCurtain(u8 taskId)
     }
 }
 
+#undef CURTAIN_HEIGHT
+#undef CURTAIN_WIDTH
+#undef tFrameTimer
+#undef tCurrentFrame
+
 void GetBattlePyramidHint(void)
 {
     gSpecialVar_Result = gSpecialVar_0x8004 / 7;