1 files changed, 226 insertions, 0 deletions
diff --git a/src/script_movement.c b/src/script_movement.c
new file mode 100644
index 000000000..7503e8f44
--- /dev/null
+++ b/src/script_movement.c
@@ -0,0 +1,226 @@
+#include "global.h"
+#include "task.h"
+#include "util.h"
+#include "event_object_movement.h"
+#include "constants/event_objects.h"
+#include "constants/event_object_movement.h"
+
+static EWRAM_DATA const u8 (*sMovementScripts[OBJECT_EVENTS_COUNT]) = {};
+
+static void ScriptMovement_StartMoveObjects(u8 priority);
+static u8 GetMoveObjectsTaskId(void);
+static u8 ScriptMovement_TryAddNewMovement(u8 taskId, u8 objEventId, const u8 *movementScript);
+static u8 GetMovementScriptIdFromObjectEventId(u8 taskId, u8 objEventId);
+static bool8 IsMovementScriptFinished(u8 taskId, u8 moveScrId);
+static void ScriptMovement_MoveObjects(u8 taskId);
+static void ScriptMovement_AddNewMovement(u8 taskId, u8 moveScrId, u8 objEventId, const u8 *movementScript);
+static void ScriptMovement_UnfreezeActiveObjects(u8 taskId);
+static void ScriptMovement_TakeStep(u8 taskId, u8 moveScrId, u8 objEventId, const u8 *movementScript);
+
+bool8 ScriptMovement_StartObjectMovementScript(u8 localId, u8 mapNum, u8 mapGroup, const u8 *movementScript)
+{
+    u8 objEventId;
+    if (TryGetObjectEventIdByLocalIdAndMap(localId, mapNum, mapGroup, &objEventId))
+        return TRUE;
+
+    if (!FuncIsActiveTask(ScriptMovement_MoveObjects))
+        ScriptMovement_StartMoveObjects(50);
+    return ScriptMovement_TryAddNewMovement(GetMoveObjectsTaskId(), objEventId, movementScript);
+}
+
+bool8 ScriptMovement_IsObjectMovementFinished(u8 localId, u8 mapNum, u8 mapGroup)
+{
+    u8 objEventId;
+    u8 taskId;
+    u8 moveScrId;
+    if (TryGetObjectEventIdByLocalIdAndMap(localId, mapNum, mapGroup, &objEventId))
+        return TRUE;
+    taskId = GetMoveObjectsTaskId();
+    moveScrId = GetMovementScriptIdFromObjectEventId(taskId, objEventId);
+    if (moveScrId == OBJECT_EVENTS_COUNT)
+        return TRUE;
+    return IsMovementScriptFinished(taskId, moveScrId);
+}
+
+void ScriptMovement_UnfreezeObjectEvents(void)
+{
+    u8 taskId = GetMoveObjectsTaskId();
+    if (taskId != TAIL_SENTINEL)
+    {
+        ScriptMovement_UnfreezeActiveObjects(taskId);
+        DestroyTask(taskId);
+    }
+}
+
+void ScriptMovement_StartMoveObjects(u8 priority)
+{
+    u8 i;
+    u8 taskId = CreateTask(ScriptMovement_MoveObjects, priority);
+    for (i = 1; i < NUM_TASK_DATA; i++)
+    {
+        gTasks[taskId].data[i] = -1;
+    }
+}
+
+u8 GetMoveObjectsTaskId(void)
+{
+    return FindTaskIdByFunc(ScriptMovement_MoveObjects);
+}
+
+bool8 ScriptMovement_TryAddNewMovement(u8 taskId, u8 objEventId, const u8 *movementScript)
+{
+    u8 moveScrId;
+
+    moveScrId = GetMovementScriptIdFromObjectEventId(taskId, objEventId);
+    if (moveScrId != OBJECT_EVENTS_COUNT)
+    {
+        if (IsMovementScriptFinished(taskId, moveScrId) == FALSE)
+        {
+            return TRUE;
+        }
+        else
+        {
+            ScriptMovement_AddNewMovement(taskId, moveScrId, objEventId, movementScript);
+            return FALSE;
+        }
+    }
+    moveScrId = GetMovementScriptIdFromObjectEventId(taskId, OBJ_EVENT_ID_PLAYER);
+    if (moveScrId == OBJECT_EVENTS_COUNT)
+    {
+        return TRUE;
+    }
+    else
+    {
+        ScriptMovement_AddNewMovement(taskId, moveScrId, objEventId, movementScript);
+        return FALSE;
+    }
+}
+
+u8 GetMovementScriptIdFromObjectEventId(u8 taskId, u8 objEventId)
+{
+    u8 i;
+    u8 *moveScriptId = (u8 *)&gTasks[taskId].data[1];
+    for (i = 0; i < OBJECT_EVENTS_COUNT; i++, moveScriptId++)
+    {
+        if (*moveScriptId == objEventId)
+            return i;
+    }
+    return OBJECT_EVENTS_COUNT;
+}
+
+void LoadObjectEventIdPtrFromMovementScript(u8 taskId, u8 moveScrId, u8 **pObjEventId)
+{
+    u8 i;
+
+    *pObjEventId = (u8 *)&gTasks[taskId].data[1];
+    for (i = 0; i < moveScrId; i++, (*pObjEventId)++)
+        ;
+}
+
+void SetObjectEventIdAtMovementScript(u8 taskId, u8 moveScrId, u8 objEventId)
+{
+    u8 *ptr;
+
+    LoadObjectEventIdPtrFromMovementScript(taskId, moveScrId, &ptr);
+    *ptr = objEventId;
+}
+
+void LoadObjectEventIdFromMovementScript(u8 taskId, u8 moveScrId, u8 *objEventId)
+{
+    u8 *ptr;
+
+    LoadObjectEventIdPtrFromMovementScript(taskId, moveScrId, &ptr);
+    *objEventId = *ptr;
+}
+
+
+static void ClearMovementScriptFinished(u8 taskId, u8 moveScrId)
+{
+    u16 mask = ~gBitTable[moveScrId];
+
+    gTasks[taskId].data[0] &= mask;
+}
+
+static void SetMovementScriptFinished(u8 taskId, u8 moveScrId)
+{
+    gTasks[taskId].data[0] |= gBitTable[moveScrId];
+}
+
+static bool8 IsMovementScriptFinished(u8 taskId, u8 moveScrId)
+{
+    u16 moveScriptFinished = (u16)gTasks[taskId].data[0] & gBitTable[moveScrId];
+
+    if (moveScriptFinished != 0)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+static void SetMovementScript(u8 moveScrId, const u8 *movementScript)
+{
+    sMovementScripts[moveScrId] = movementScript;
+}
+
+static const u8 *GetMovementScript(u8 moveScrId)
+{
+    return sMovementScripts[moveScrId];
+}
+
+static void ScriptMovement_AddNewMovement(u8 taskId, u8 moveScrId, u8 objEventId, const u8 *movementScript)
+{
+    ClearMovementScriptFinished(taskId, moveScrId);
+    SetMovementScript(moveScrId, movementScript);
+    SetObjectEventIdAtMovementScript(taskId, moveScrId, objEventId);
+}
+
+static void ScriptMovement_UnfreezeActiveObjects(u8 taskId)
+{
+    u8 *pObjEventId;
+    u8 i;
+
+    pObjEventId = (u8 *)&gTasks[taskId].data[1];
+    for (i = 0; i < OBJECT_EVENTS_COUNT; i++, pObjEventId++)
+    {
+        if (*pObjEventId != 0xFF)
+            UnfreezeObjectEvent(&gObjectEvents[*pObjEventId]);
+    }
+}
+
+static void ScriptMovement_MoveObjects(u8 taskId)
+{
+    u8 i;
+    u8 objEventId;
+
+    for (i = 0; i < OBJECT_EVENTS_COUNT; i++)
+    {
+        LoadObjectEventIdFromMovementScript(taskId, i, &objEventId);
+        if (objEventId != 0xFF)
+            ScriptMovement_TakeStep(taskId, i, objEventId, GetMovementScript(i));
+    }
+}
+
+static void ScriptMovement_TakeStep(u8 taskId, u8 moveScrId, u8 objEventId, const u8 *movementScript)
+{
+    u8 nextMoveActionId;
+
+    if (IsMovementScriptFinished(taskId, moveScrId) == TRUE)
+        return;
+    if (ObjectEventIsSpecialAnimActive(&gObjectEvents[objEventId])
+        && !ObjectEventClearHeldMovementIfFinished(&gObjectEvents[objEventId]))
+        return;
+
+    nextMoveActionId = *movementScript;
+    if (nextMoveActionId == MOVEMENT_ACTION_STEP_END)
+    {
+        SetMovementScriptFinished(taskId, moveScrId);
+        FreezeObjectEvent(&gObjectEvents[objEventId]);
+    }
+    else
+    {
+        if (!ObjectEventSetHeldMovement(&gObjectEvents[objEventId], nextMoveActionId))
+        {
+            movementScript++;
+            SetMovementScript(moveScrId, movementScript);
+        }
+    }
+}