1 files changed, 318 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..b453d3794
--- /dev/null
+++ b/src/field/field_map_obj_helpers.c
@@ -0,0 +1,318 @@
+#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);
+
+extern s16 gUnknown_08376194[];
+extern SpriteStepFunc *gUnknown_08376180[];
+extern s8 *gUnknown_083761D0[];
+extern s16 gUnknown_083761DC[];
+extern u8 gUnknown_083761E2[];
+extern s16 gUnknown_083761E6[];
+extern u8 gUnknown_083761EC[];
+
+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->data3 = a2;
+    sprite->data4 = a3;
+    sprite->data5 = 0;
+}
+
+bool8 obj_npc_ministep(struct Sprite *sprite)
+{
+    if (sprite->data5 >= gUnknown_08376194[sprite->data4])
+        return FALSE;
+
+    gUnknown_08376180[sprite->data4][sprite->data5](sprite, sprite->data3);
+
+    sprite->data5++;
+
+    if (sprite->data5 < gUnknown_08376194[sprite->data4])
+        return FALSE;
+
+    return TRUE;
+}
+
+void sub_806467C(struct Sprite *sprite, u8 a2)
+{
+    sprite->data3 = a2;
+    sprite->data4 = 0;
+    sprite->data5 = 0;
+}
+
+bool8 sub_806468C(struct Sprite *sprite)
+{
+    if (!(sprite->data4 & 1))
+    {
+        Step1(sprite, sprite->data3);
+        sprite->data5++;
+    }
+
+    sprite->data4++;
+
+    if (sprite->data5 > 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->data3 = a2;
+    sprite->data4 = a3;
+    sprite->data5 = a4;
+    sprite->data6 = 0;
+}
+
+u8 sub_8064704(struct Sprite *sprite)
+{
+    u8 v2;
+    s16 v5[3];
+    u8 v6[3];
+
+    memcpy(v5, gUnknown_083761DC, 6);
+    memcpy(v6, gUnknown_083761E2, 3);
+
+    v2 = 0;
+
+    if (sprite->data4)
+        Step1(sprite, sprite->data3);
+
+    sprite->pos2.y = sub_80646C8(sprite->data6 >> v6[sprite->data4], sprite->data5);
+
+    sprite->data6++;
+
+    if (sprite->data6 == (v5[sprite->data4] >> 1))
+        v2 = 1;
+
+    if (sprite->data6 >= v5[sprite->data4])
+    {
+        sprite->pos2.y = 0;
+        v2 = -1;
+    }
+
+    return v2;
+}
+
+u8 sub_806478C(struct Sprite *sprite)
+{
+    u8 v2;
+    s16 v5[3];
+    u8 v6[3];
+
+    memcpy(v5, gUnknown_083761E6, 6);
+    memcpy(v6, gUnknown_083761EC, 3);
+
+    v2 = 0;
+
+    if (sprite->data4 && !(sprite->data6 & 1))
+        Step1(sprite, sprite->data3);
+
+    sprite->pos2.y = sub_80646C8(sprite->data6 >> v6[sprite->data4], sprite->data5);
+
+    sprite->data6++;
+
+    if (sprite->data6 == (v5[sprite->data4] >> 1))
+        v2 = 1;
+
+    if (sprite->data6 >= v5[sprite->data4])
+    {
+        sprite->pos2.y = 0;
+        v2 = -1;
+    }
+
+    return v2;
+}
+
+void sub_8064820(struct Sprite *sprite, u16 a2)
+{
+    sprite->data3 = a2;
+}
+
+bool8 sub_8064824(struct Sprite *sprite)
+{
+    sprite->data3--;
+
+    if (sprite->data3 == 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->data1, 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->data0 == a1)
+        {
+            u8 animNum = FieldObjectDirectionToImageAnimId(dir);
+            StartSpriteAnim(sprite, animNum);
+            break;
+        }
+    }
+}
+
+u32 oe_exec_and_other_stuff(u8 fieldEffectId, struct MapObject *mapObject)
+{
+    FieldObjectGetLocalIdAndMap(mapObject, (u8 *)&gFieldEffectArguments[0], (u8 *)&gFieldEffectArguments[1], (u8 *)&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);
+}