start decompiling field_map_obj_helpers

1 files changed, 371 insertions, 0 deletions

diff --git a/src/field_map_obj_helpers.c b/src/field_map_obj_helpers.c
new file mode 100755
index 000000000..1247a7cd7
--- /dev/null
+++ b/src/field_map_obj_helpers.c
@@ -0,0 +1,371 @@
+#include "global.h"
+#include "field_ground_effect.h"
+#include "field_map_obj.h"
+
+typedef void (*SpriteStepFunc)(struct Sprite *sprite, u8 dir);
+
+extern const s8 gUnknown_0850E7BA[];
+extern const s8 gUnknown_0850E772[];
+
+extern s16 gUnknown_0850E768[];
+extern SpriteStepFunc *const gUnknown_0850E754[];
+extern const struct Coords16 gUnknown_0850DB7C[4];
+
+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 npc_sync_anim_pause_bits(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)
+            npc_sync_anim_pause_bits(&gMapObjects[i]);
+}
+
+void little_step(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += gUnknown_0850DB7C[dir].y;
+}
+
+void double_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 2 * (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 2 * (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void triple_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 2 * (u16) gUnknown_0850DB7C[dir].x + (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 2 * (u16) gUnknown_0850DB7C[dir].y + (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void quad_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 4 * (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 4 * (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void oct_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 8 * (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 8 * (u16) gUnknown_0850DB7C[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_0850E768[sprite->data[4]])
+        return FALSE;
+
+    gUnknown_0850E754[sprite->data[4]][sprite->data[5]](sprite, sprite->data[3]);
+
+    sprite->data[5]++;
+
+    if (sprite->data[5] < gUnknown_0850E768[sprite->data[4]])
+        return FALSE;
+
+    return TRUE;
+}
+
+void sub_80976DC(struct Sprite *sprite, u8 a2)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = 0;
+    sprite->data[5] = 0;
+}
+
+bool8 sub_80976EC(struct Sprite *sprite)
+{
+    if (!(sprite->data[4] & 1))
+    {
+        little_step(sprite, sprite->data[3]);
+        sprite->data[5]++;
+    }
+
+    sprite->data[4]++;
+
+    if (sprite->data[5] > 15)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+// new helper added here in the middle. Perhaps Game Freak kept these organized in alphebetical order or some other heirarchy?
+
+s16 sub_8097728(s16 a1)
+{
+    return gUnknown_0850E7BA[a1];
+}
+
+s16 sub_809773C(s16 a1)
+{
+    return gUnknown_0850E772[a1];
+}
+
+void sub_8097750(struct Sprite *sprite)
+{
+    sprite->data[6] = 0;
+    sprite->data[7] = 0;
+}
+
+bool8 sub_8097758(struct Sprite *sprite)
+{
+    bool8 result = FALSE;
+
+    switch(sprite->data[7])
+    {
+        case 0:
+            sprite->pos2.x += sub_809773C(sprite->data[6]);
+            sprite->pos2.y += sub_8097728(sprite->data[6]);
+            break;
+        case 1:
+            sprite->pos2.x -= sub_809773C(0x47 - sprite->data[6]);
+            sprite->pos2.y += sub_8097728(0x47 - sprite->data[6]);
+            break;
+        case 2:
+            sprite->pos2.x -= sub_809773C(sprite->data[6]);
+            sprite->pos2.y += sub_8097728(sprite->data[6]);
+            break;
+        case 3:
+            sprite->pos2.x += sub_809773C(0x47 - sprite->data[6]);
+            sprite->pos2.y += sub_8097728(0x47 - sprite->data[6]);
+            break;
+    }
+    if(++sprite->data[6] == 0x48)
+    {
+        sprite->data[6] = 0;
+        sprite->data[7]++;
+    }
+    if(sprite->data[7] == 0x4)
+    {
+        sprite->pos2.y = 0;
+        sprite->pos2.x = 0;
+        result = TRUE;
+    }
+    return result;
+}
+
+extern const s8 *const gUnknown_0850E834[];
+extern s16 gUnknown_0850E840[];
+extern u8 gUnknown_0850E846[];
+
+s16 sub_8097820(s16 a1, u8 a2)
+{
+    return gUnknown_0850E834[a2][a1];
+}
+
+void sub_809783C(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_809785C(struct Sprite *sprite)
+{
+    s16 v5[3];
+    u8 v6[3];
+    u8 v2;
+
+    memcpy(v5, gUnknown_0850E840, 6); // TODO: get rid of memcpy
+    memcpy(v6, gUnknown_0850E846, 3);
+    v2 = 0;
+
+    if (sprite->data[4])
+        little_step(sprite, sprite->data[3]);
+
+    sprite->pos2.y = sub_8097820(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;
+}
+
+extern s16 gUnknown_0850E84A[];
+extern u8 gUnknown_0850E850[];
+
+u8 sub_80978E4(struct Sprite *sprite)
+{
+    s16 v5[3];
+    u8 v6[3];
+    u8 v2;
+
+    memcpy(v5, gUnknown_0850E84A, 6);
+    memcpy(v6, gUnknown_0850E850, 3);
+    v2 = 0;
+
+    if (sprite->data[4] && !(sprite->data[6] & 1))
+        little_step(sprite, sprite->data[3]);
+
+    sprite->pos2.y = sub_8097820(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 SetFieldObjectStepTimer(struct Sprite *sprite, u16 timer)
+{
+    sprite->data[3] = timer;
+}
+
+
+bool8 RunFieldObjectStepTimer(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_80979BC(struct Sprite *sprite)
+{
+    if (sprite->animEnded)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void sub_80979D4(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;
+}
+
+extern void sub_8097D68(struct Sprite *sprite);
+
+void sub_8097AC8(struct Sprite *sprite)
+{
+    sub_8097D68(sprite);
+    SetObjectSubpriorityByZCoord(sprite->data[1], sprite, 1);
+    sub_80979D4(sprite, sprite->data[2]);
+}
+
+void sub_8097AF0(void)
+{
+    int i;
+
+    for(i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        if(sprite->inUse && sprite->callback == sub_8097AC8)
+            DestroySprite(sprite);
+    }
+}
+
+int sub_8097B2C(u8 var) // this should return a u8, because all that call this shifts to u8, but it wont match because it doesnt shift u8 at the end.
+{
+    int i;
+
+    for(i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        if(sprite->inUse && sprite->callback == sub_8097AC8 && (u8)sprite->data[0] == var)
+            return i;
+    }
+    return MAX_SPRITES;
+}
+
+void sub_8097B78(u8 var1, u8 var2)
+{
+    u8 spriteId = sub_8097B2C(var1);
+
+    if(spriteId != MAX_SPRITES)
+        StartSpriteAnim(&gSprites[spriteId], FieldObjectDirectionToImageAnimId(var2));
+}