1 files changed, 387 insertions, 0 deletions
diff --git a/src/field/field_map_obj_helpers.c b/src/field/field_map_obj_helpers.c
new file mode 100644
index 000000000..328b66ed2
--- /dev/null
+++ b/src/field/field_map_obj_helpers.c
@@ -0,0 +1,387 @@
+#include "global.h"
+#include "field_map_obj_helpers.h"
+#include "field_effect.h"
+#include "field_ground_effect.h"
+#include "field_map_obj.h"
+#include "sprite.h"
+
+typedef void (*SpriteStepFunc)(struct Sprite *sprite, u8 dir);
+
+void Step1(struct Sprite *sprite, u8 dir);
+void Step2(struct Sprite *sprite, u8 dir);
+void Step3(struct Sprite *sprite, u8 dir);
+void Step4(struct Sprite *sprite, u8 dir);
+void Step8(struct Sprite *sprite, u8 dir);
+
+const SpriteStepFunc Unknown_83760F0[] = {
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1,
+    Step1
+};
+
+const SpriteStepFunc Unknown_8376130[] = {
+    Step2,
+    Step2,
+    Step2,
+    Step2,
+    Step2,
+    Step2,
+    Step2,
+    Step2
+};
+
+const SpriteStepFunc Unknown_8376150[] = {
+    Step2,
+    Step3,
+    Step3,
+    Step2,
+    Step3,
+    Step3
+};
+
+const SpriteStepFunc Unknown_8376168[] = {
+    Step4,
+    Step4,
+    Step4,
+    Step4
+};
+
+const SpriteStepFunc Unknown_8376178[] = {
+    Step8,
+    Step8
+};
+
+const SpriteStepFunc *const gUnknown_08376180[] = {
+    Unknown_83760F0,
+    Unknown_8376130,
+    Unknown_8376150,
+    Unknown_8376168,
+    Unknown_8376178
+};
+
+const s16 gUnknown_08376194[] = {
+    16, 8, 6, 4, 2
+};
+
+const s8 Unknown_837619E[] = {
+     -4,  -6,  -8, -10, -11, -12, -12, -12, -11, -10,  -9,  -8,  -6,  -4,   0,   0
+};
+
+const s8 Unknown_83761AE[] = {
+      0,  -2,  -3,  -4,  -5,  -6,  -6,  -6,  -5,  -5,  -4,  -3,  -2,   0,   0,   0
+};
+
+const s8 Unknown_83761BE[] = {
+     -2,  -4,  -6,  -8,  -9, -10, -10, -10,  -9,  -8,  -6,  -5,  -3,  -2,   0,   0
+};
+
+const s8 *const gUnknown_083761D0[] = {
+    Unknown_837619E,
+    Unknown_83761AE,
+    Unknown_83761BE
+};
+
+bool8 FreezeMapObject(struct MapObject *mapObject)
+{
+    if (mapObject->mapobj_bit_6 || mapObject->mapobj_bit_8)
+    {
+        return TRUE;
+    }
+    else
+    {
+        mapObject->mapobj_bit_8 = 1;
+        mapObject->mapobj_bit_23 = gSprites[mapObject->spriteId].animPaused;
+        mapObject->mapobj_bit_24 = gSprites[mapObject->spriteId].affineAnimPaused;
+        gSprites[mapObject->spriteId].animPaused = 1;
+        gSprites[mapObject->spriteId].affineAnimPaused = 1;
+        return FALSE;
+    }
+}
+
+void FreezeMapObjects(void)
+{
+    u8 i;
+    for (i = 0; i < 16; i++)
+        if (gMapObjects[i].active && i != gPlayerAvatar.mapObjectId)
+            FreezeMapObject(&gMapObjects[i]);
+}
+
+void FreezeMapObjectsExceptOne(u8 a1)
+{
+    u8 i;
+    for (i = 0; i < 16; i++)
+        if (i != a1 && gMapObjects[i].active && i != gPlayerAvatar.mapObjectId)
+            FreezeMapObject(&gMapObjects[i]);
+}
+
+void UnfreezeMapObject(struct MapObject *mapObject)
+{
+    if (mapObject->active && mapObject->mapobj_bit_8)
+    {
+        mapObject->mapobj_bit_8 = 0;
+        gSprites[mapObject->spriteId].animPaused = mapObject->mapobj_bit_23;
+        gSprites[mapObject->spriteId].affineAnimPaused = mapObject->mapobj_bit_24;
+    }
+}
+
+void UnfreezeMapObjects(void)
+{
+    u8 i;
+    for (i = 0; i < 16; i++)
+        if (gMapObjects[i].active)
+            UnfreezeMapObject(&gMapObjects[i]);
+}
+
+void Step1(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += gDirectionToVector[dir].x;
+    sprite->pos1.y += gDirectionToVector[dir].y;
+}
+
+void Step2(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 2 * (u16) gDirectionToVector[dir].x;
+    sprite->pos1.y += 2 * (u16) gDirectionToVector[dir].y;
+}
+
+void Step3(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 2 * (u16) gDirectionToVector[dir].x + (u16) gDirectionToVector[dir].x;
+    sprite->pos1.y += 2 * (u16) gDirectionToVector[dir].y + (u16) gDirectionToVector[dir].y;
+}
+
+void Step4(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 4 * (u16) gDirectionToVector[dir].x;
+    sprite->pos1.y += 4 * (u16) gDirectionToVector[dir].y;
+}
+
+void Step8(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 8 * (u16) gDirectionToVector[dir].x;
+    sprite->pos1.y += 8 * (u16) gDirectionToVector[dir].y;
+}
+
+void oamt_npc_ministep_reset(struct Sprite *sprite, u8 a2, u8 a3)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = a3;
+    sprite->data[5] = 0;
+}
+
+bool8 obj_npc_ministep(struct Sprite *sprite)
+{
+    if (sprite->data[5] >= gUnknown_08376194[sprite->data[4]])
+        return FALSE;
+
+    gUnknown_08376180[sprite->data[4]][sprite->data[5]](sprite, sprite->data[3]);
+
+    sprite->data[5]++;
+
+    if (sprite->data[5] < gUnknown_08376194[sprite->data[4]])
+        return FALSE;
+
+    return TRUE;
+}
+
+void sub_806467C(struct Sprite *sprite, u8 a2)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = 0;
+    sprite->data[5] = 0;
+}
+
+bool8 sub_806468C(struct Sprite *sprite)
+{
+    if (!(sprite->data[4] & 1))
+    {
+        Step1(sprite, sprite->data[3]);
+        sprite->data[5]++;
+    }
+
+    sprite->data[4]++;
+
+    if (sprite->data[5] > 15)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+s16 sub_80646C8(s16 a1, u8 a2)
+{
+    return gUnknown_083761D0[a2][a1];
+}
+
+void sub_80646E4(struct Sprite *sprite, u8 a2, u8 a3, u8 a4)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = a3;
+    sprite->data[5] = a4;
+    sprite->data[6] = 0;
+}
+
+u8 sub_8064704(struct Sprite *sprite)
+{
+    s16 v5[3] = {0x10, 0x10, 0x20};
+    u8 v6[3] = {0, 0, 1};
+    u8 v2 = 0;
+
+    if (sprite->data[4])
+        Step1(sprite, sprite->data[3]);
+
+    sprite->pos2.y = sub_80646C8(sprite->data[6] >> v6[sprite->data[4]], sprite->data[5]);
+
+    sprite->data[6]++;
+
+    if (sprite->data[6] == (v5[sprite->data[4]] >> 1))
+        v2 = 1;
+
+    if (sprite->data[6] >= v5[sprite->data[4]])
+    {
+        sprite->pos2.y = 0;
+        v2 = -1;
+    }
+
+    return v2;
+}
+
+u8 sub_806478C(struct Sprite *sprite)
+{
+    s16 v5[3] = {0x20, 0x20, 0x40};
+    u8 v6[3] = {1, 1, 2};
+    u8 v2 = 0;
+
+    if (sprite->data[4] && !(sprite->data[6] & 1))
+        Step1(sprite, sprite->data[3]);
+
+    sprite->pos2.y = sub_80646C8(sprite->data[6] >> v6[sprite->data[4]], sprite->data[5]);
+
+    sprite->data[6]++;
+
+    if (sprite->data[6] == (v5[sprite->data[4]] >> 1))
+        v2 = 1;
+
+    if (sprite->data[6] >= v5[sprite->data[4]])
+    {
+        sprite->pos2.y = 0;
+        v2 = -1;
+    }
+
+    return v2;
+}
+
+void sub_8064820(struct Sprite *sprite, u16 a2)
+{
+    sprite->data[3] = a2;
+}
+
+bool8 sub_8064824(struct Sprite *sprite)
+{
+    sprite->data[3]--;
+
+    if (sprite->data[3] == 0)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void obj_anim_image_set_and_seek(struct Sprite *sprite, u8 a2, u8 a3)
+{
+    sprite->animNum = a2;
+    sprite->animPaused = 0 ;
+    SeekSpriteAnim(sprite, a3);
+}
+
+bool8 sub_8064864(struct Sprite *sprite)
+{
+    if (sprite->animEnded)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void sub_806487C(struct Sprite *sprite, bool8 invisible)
+{
+    u16 x, y;
+    s16 x2, y2;
+
+    sprite->invisible = invisible;
+
+    if (sprite->coordOffsetEnabled)
+    {
+        x = sprite->pos1.x + sprite->pos2.x + sprite->centerToCornerVecX + gSpriteCoordOffsetX;
+        y = sprite->pos1.y + sprite->pos2.y + sprite->centerToCornerVecY + gSpriteCoordOffsetY;
+    }
+    else
+    {
+        x = sprite->pos1.x + sprite->pos2.x + sprite->centerToCornerVecX;
+        y = sprite->pos1.y + sprite->pos2.y + sprite->centerToCornerVecY;
+    }
+
+    x2 = x - (sprite->centerToCornerVecX >> 1);
+    y2 = y - (sprite->centerToCornerVecY >> 1);
+
+    if ((s16)x > 255 || x2 < -16)
+        sprite->invisible = 1;
+    if ((s16)y > 175 || y2 < -16)
+        sprite->invisible = 1;
+}
+
+void sub_8064970(struct Sprite *sprite)
+{
+    SetObjectSubpriorityByZCoord(sprite->data[1], sprite, 1);
+    sub_806487C(sprite, 0);
+}
+
+void sub_8064990(u8 a1, u8 dir)
+{
+    u8 i;
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        if (sprite->inUse && sprite->callback == sub_8064970 && (u8)sprite->data[0] == a1)
+        {
+            u8 animNum = FieldObjectDirectionToImageAnimId(dir);
+            StartSpriteAnim(sprite, animNum);
+            break;
+        }
+    }
+}
+
+u32 oe_exec_and_other_stuff(u8 fieldEffectId, struct MapObject *mapObject)
+{
+    FieldObjectGetLocalIdAndMap(mapObject, &gFieldEffectArguments[0], &gFieldEffectArguments[1], &gFieldEffectArguments[2]);
+    return FieldEffectStart(fieldEffectId);
+}
+
+void DoShadowFieldEffect(struct MapObject *mapObject)
+{
+    if (!mapObject->mapobj_bit_22)
+    {
+        mapObject->mapobj_bit_22 = 1;
+        oe_exec_and_other_stuff(FLDEFF_SHADOW, mapObject);
+    }
+}
+
+void DoRippleFieldEffect(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    const struct MapObjectGraphicsInfo *gfxInfo = GetFieldObjectGraphicsInfo(mapObject->graphicsId);
+    gFieldEffectArguments[0] = sprite->pos1.x;
+    gFieldEffectArguments[1] = sprite->pos1.y + (gfxInfo->height >> 1) - 2;
+    gFieldEffectArguments[2] = 151;
+    gFieldEffectArguments[3] = 3;
+    FieldEffectStart(FLDEFF_RIPPLE);
+}