Port/decompile fieldmap.c

1 files changed, 1034 insertions, 0 deletions

diff --git a/src/fieldmap.c b/src/fieldmap.c
new file mode 100644
index 000000000..87e493e95
--- /dev/null
+++ b/src/fieldmap.c
@@ -0,0 +1,1034 @@
+#include "global.h"
+#include "overworld.h"
+#include "bg.h"
+#include "battle_frontier_2.h"
+#include "constants/RGB.h"
+#include "fieldmap.h"
+#include "fldeff_80F9BCC.h"
+#include "fldeff_cut.h"
+#include "fldeff_groundshake.h"
+#include "menu.h"
+#include "palette.h"
+#include "pokenav.h"
+#include "script.h"
+#include "secret_base.h"
+#include "tv.h"
+
+struct ConnectionFlags
+{
+    u8 south:1;
+    u8 north:1;
+    u8 west:1;
+    u8 east:1;
+};
+
+EWRAM_DATA static u16 gUnknown_02032318[0x2800] = {0};
+EWRAM_DATA struct MapHeader gMapHeader = {0};
+EWRAM_DATA struct Camera gCamera = {0};
+EWRAM_DATA static struct ConnectionFlags gUnknown_02037340 = {0};
+EWRAM_DATA static u32 sFiller_02037344 = 0; // without this, the next file won't align properly
+
+struct BackupMapData gUnknown_03005DC0;
+
+static const struct ConnectionFlags sDummyConnectionFlags = {0};
+
+struct MapHeader const *const mapconnection_get_mapheader(struct MapConnection *connection)
+{
+    return Overworld_GetMapHeaderByGroupAndId(connection->mapGroup, connection->mapNum);
+}
+
+void not_trainer_hill_battle_pyramid(void)
+{
+    mapheader_copy_mapdata_with_padding(&gMapHeader);
+    sub_80E8EE0(gMapHeader.events);
+    mapheader_run_script_with_tag_x1();
+}
+
+void sub_8087D74(void)
+{
+    mapheader_copy_mapdata_with_padding(&gMapHeader);
+    sub_80E9238(0);
+    sub_80E8EE0(gMapHeader.events);
+    mapdata_from_sav2();
+    mapheader_run_script_with_tag_x1();
+    UpdateTVScreensOnMap(gUnknown_03005DC0.width, gUnknown_03005DC0.height);
+}
+
+void battle_pyramid_map_load_related(u8 a0)
+{
+    CpuFastFill(0x03ff03ff, gUnknown_02032318, sizeof(gUnknown_02032318));
+    sub_81AA078(gUnknown_02032318, a0);
+}
+
+void trainer_hill_map_load_related(void)
+{
+    CpuFastFill(0x03ff03ff, gUnknown_02032318, sizeof(gUnknown_02032318));
+    sub_81D5FB4(gUnknown_02032318);
+}
+
+void mapheader_copy_mapdata_with_padding(struct MapHeader *mapHeader)
+{
+    struct MapData const *mapData;
+    int width;
+    int height;
+    mapData = mapHeader->mapData;
+    CpuFastFill16(0x03ff, gUnknown_02032318, sizeof(gUnknown_02032318));
+    gUnknown_03005DC0.map = gUnknown_02032318;
+    width = mapData->width + 15;
+    gUnknown_03005DC0.width = width;
+    height = mapData->height + 14;
+    gUnknown_03005DC0.height = height;
+    if (width * height <= 0x2800)
+    {
+        map_copy_with_padding(mapData->map, mapData->width, mapData->height);
+        mapheader_copy_mapdata_of_adjacent_maps(mapHeader);
+    }
+}
+
+void map_copy_with_padding(u16 *map, u16 width, u16 height)
+{
+    u16 *dest;
+    int y;
+    dest = gUnknown_03005DC0.map;
+    dest += gUnknown_03005DC0.width * 7 + 7;
+    for (y = 0; y < height; y++)
+    {
+        CpuCopy16(map, dest, width * 2);
+        dest += width + 0xf;
+        map += width;
+    }
+}
+
+void mapheader_copy_mapdata_of_adjacent_maps(struct MapHeader *mapHeader)
+{
+    int count;
+    struct MapConnection *connection;
+    int i;
+
+    if (mapHeader->connections)
+    {
+        count = mapHeader->connections->count;
+        connection = mapHeader->connections->connections;
+
+        gUnknown_02037340 = sDummyConnectionFlags;
+        for (i = 0; i < count; i++, connection++)
+        {
+            struct MapHeader const *cMap = mapconnection_get_mapheader(connection);
+            u32 offset = connection->offset;
+
+            switch (connection->direction)
+            {
+            case CONNECTION_SOUTH:
+                fillSouthConnection(mapHeader, cMap, offset);
+                gUnknown_02037340.south = 1;
+                break;
+            case CONNECTION_NORTH:
+                fillNorthConnection(mapHeader, cMap, offset);
+                gUnknown_02037340.north = 1;
+                break;
+            case CONNECTION_WEST:
+                fillWestConnection(mapHeader, cMap, offset);
+                gUnknown_02037340.west = 1;
+                break;
+            case CONNECTION_EAST:
+                fillEastConnection(mapHeader, cMap, offset);
+                gUnknown_02037340.east = 1;
+                break;
+            }
+        }
+    }
+}
+
+void sub_8087F54(int x, int y, struct MapHeader const *mapHeader, int x2, int y2, int width, int height)
+{
+    int i;
+    u16 *src;
+    u16 *dest;
+    int mapWidth;
+
+    mapWidth = mapHeader->mapData->width;
+    src = &mapHeader->mapData->map[mapWidth * y2 + x2];
+    dest = &gUnknown_03005DC0.map[gUnknown_03005DC0.width * y + x];
+
+    for (i = 0; i < height; i++)
+    {
+        CpuCopy16(src, dest, width * 2);
+        dest += gUnknown_03005DC0.width;
+        src += mapWidth;
+    }
+}
+
+void fillSouthConnection(struct MapHeader const *mapHeader, struct MapHeader const *connectedMapHeader, s32 offset)
+{
+    int x, y;
+    int x2;
+    int width;
+    int cWidth;
+
+    if (connectedMapHeader)
+    {
+        cWidth = connectedMapHeader->mapData->width;
+        x = offset + 7;
+        y = mapHeader->mapData->height + 7;
+        if (x < 0)
+        {
+            x2 = -x;
+            x += cWidth;
+            if (x < gUnknown_03005DC0.width)
+            {
+                width = x;
+            }
+            else
+            {
+                width = gUnknown_03005DC0.width;
+            }
+            x = 0;
+        }
+        else
+        {
+            x2 = 0;
+            if (x + cWidth < gUnknown_03005DC0.width)
+            {
+                width = cWidth;
+            }
+            else
+            {
+                width = gUnknown_03005DC0.width - x;
+            }
+        }
+
+        sub_8087F54(
+            x, y,
+            connectedMapHeader,
+            x2, /*y2*/ 0,
+            width, /*height*/ 7);
+    }
+}
+
+void fillNorthConnection(struct MapHeader const *mapHeader, struct MapHeader const *connectedMapHeader, s32 offset)
+{
+    int x;
+    int x2, y2;
+    int width;
+    int cWidth, cHeight;
+
+    if (connectedMapHeader)
+    {
+        cWidth = connectedMapHeader->mapData->width;
+        cHeight = connectedMapHeader->mapData->height;
+        x = offset + 7;
+        y2 = cHeight - 7;
+        if (x < 0)
+        {
+            x2 = -x;
+            x += cWidth;
+            if (x < gUnknown_03005DC0.width)
+            {
+                width = x;
+            }
+            else
+            {
+                width = gUnknown_03005DC0.width;
+            }
+            x = 0;
+        }
+        else
+        {
+            x2 = 0;
+            if (x + cWidth < gUnknown_03005DC0.width)
+            {
+                width = cWidth;
+            }
+            else
+            {
+                width = gUnknown_03005DC0.width - x;
+            }
+        }
+
+        sub_8087F54(
+            x, /*y*/ 0,
+            connectedMapHeader,
+            x2, y2,
+            width, /*height*/ 7);
+
+    }
+}
+
+void fillWestConnection(struct MapHeader const *mapHeader, struct MapHeader const *connectedMapHeader, s32 offset)
+{
+    int y;
+    int x2, y2;
+    int height;
+    int cWidth, cHeight;
+    if (connectedMapHeader)
+    {
+        cWidth = connectedMapHeader->mapData->width;
+        cHeight = connectedMapHeader->mapData->height;
+        y = offset + 7;
+        x2 = cWidth - 7;
+        if (y < 0)
+        {
+            y2 = -y;
+            if (y + cHeight < gUnknown_03005DC0.height)
+            {
+                height = y + cHeight;
+            }
+            else
+            {
+                height = gUnknown_03005DC0.height;
+            }
+            y = 0;
+        }
+        else
+        {
+            y2 = 0;
+            if (y + cHeight < gUnknown_03005DC0.height)
+            {
+                height = cHeight;
+            }
+            else
+            {
+                height = gUnknown_03005DC0.height - y;
+            }
+        }
+
+        sub_8087F54(
+            /*x*/ 0, y,
+            connectedMapHeader,
+            x2, y2,
+            /*width*/ 7, height);
+    }
+}
+
+void fillEastConnection(struct MapHeader const *mapHeader, struct MapHeader const *connectedMapHeader, s32 offset)
+{
+    int x, y;
+    int y2;
+    int height;
+    int cHeight;
+    if (connectedMapHeader)
+    {
+        cHeight = connectedMapHeader->mapData->height;
+        x = mapHeader->mapData->width + 7;
+        y = offset + 7;
+        if (y < 0)
+        {
+            y2 = -y;
+            if (y + cHeight < gUnknown_03005DC0.height)
+            {
+                height = y + cHeight;
+            }
+            else
+            {
+                height = gUnknown_03005DC0.height;
+            }
+            y = 0;
+        }
+        else
+        {
+            y2 = 0;
+            if (y + cHeight < gUnknown_03005DC0.height)
+            {
+                height = cHeight;
+            }
+            else
+            {
+                height = gUnknown_03005DC0.height - y;
+            }
+        }
+
+        sub_8087F54(
+            x, y,
+            connectedMapHeader,
+            /*x2*/ 0, y2,
+            /*width*/ 8, height);
+    }
+}
+
+union Block
+{
+    struct
+    {
+        u16 block:10;
+        u16 collision:2;
+        u16 elevation:4;
+    } block;
+    u16 value;
+};
+
+u8 MapGridGetZCoordAt(int x, int y)
+{
+    u16 block;
+    int i;
+    u16 *border;
+
+    if (x >= 0 && x < gUnknown_03005DC0.width
+     && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        block = gUnknown_03005DC0.map[x + gUnknown_03005DC0.width * y];
+    }
+    else
+    {
+        border = gMapHeader.mapData->border;
+        i = (x + 1) & 1;
+        i += ((y + 1) & 1) * 2;
+        block = gMapHeader.mapData->border[i];
+        block |= 0xc00;
+    }
+
+    if (block == 0x3ff)
+    {
+        return 0;
+    }
+    
+    return block >> 12;
+}
+
+u8 MapGridIsImpassableAt(int x, int y)
+{
+    u16 block;
+    int i;
+    u16 *border;
+
+    if (x >= 0 && x < gUnknown_03005DC0.width
+     && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        block = gUnknown_03005DC0.map[x + gUnknown_03005DC0.width * y];
+    }
+    else
+    {
+        border = gMapHeader.mapData->border;
+        i = (x + 1) & 1;
+        i += ((y + 1) & 1) * 2;
+        block = gMapHeader.mapData->border[i];
+        block |= 0xc00;
+    }
+    if (block == 0x3ff)
+    {
+        return 1;
+    }
+    return (block & 0xc00) >> 10;
+}
+
+u32 MapGridGetMetatileIdAt(int x, int y)
+{
+    u16 block;
+    int i;
+    int j;
+    struct MapData const *mapData;
+    u16 *border;
+    u16 block2;
+
+    if (x >= 0 && x < gUnknown_03005DC0.width
+     && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        block = gUnknown_03005DC0.map[x + gUnknown_03005DC0.width * y];
+    }
+    else
+    {
+        mapData = gMapHeader.mapData;
+        i = (x + 1) & 1;
+        i += ((y + 1) & 1) * 2;
+        block = mapData->border[i] | 0xc00;
+    }
+    if (block == 0x3ff)
+    {
+        border = gMapHeader.mapData->border;
+        j = (x + 1) & 1;
+        j += ((y + 1) & 1) * 2;
+        block2 = gMapHeader.mapData->border[j];
+        block2 |= 0xc00;
+        return block2 & block;
+    }
+    return block & 0x3ff;
+}
+
+u32 MapGridGetMetatileBehaviorAt(int x, int y)
+{
+    u16 metatile;
+    metatile = MapGridGetMetatileIdAt(x, y);
+    return GetBehaviorByMetatileId(metatile) & 0xff;
+}
+
+u8 MapGridGetMetatileLayerTypeAt(int x, int y)
+{
+    u16 metatile;
+    metatile = MapGridGetMetatileIdAt(x, y);
+    return (GetBehaviorByMetatileId(metatile) & 0xf000) >> 12;
+}
+
+void MapGridSetMetatileIdAt(int x, int y, u16 metatile)
+{
+    int i;
+    if (x >= 0 && x < gUnknown_03005DC0.width
+     && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        i = x + y * gUnknown_03005DC0.width;
+        gUnknown_03005DC0.map[i] = (gUnknown_03005DC0.map[i] & 0xf000) | (metatile & 0xfff);
+    }
+}
+
+void MapGridSetMetatileEntryAt(int x, int y, u16 metatile)
+{
+    int i;
+    if (x >= 0 && x < gUnknown_03005DC0.width
+     && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        i = x + gUnknown_03005DC0.width * y;
+        gUnknown_03005DC0.map[i] = metatile;
+    }
+}
+
+u16 GetBehaviorByMetatileId(u16 metatile)
+{
+    u16 *attributes;
+    if (metatile <= 0x1ff)
+    {
+        attributes = gMapHeader.mapData->primaryTileset->metatileAttributes;
+        return attributes[metatile];
+    }
+    else if (metatile <= 0x3ff)
+    {
+        attributes = gMapHeader.mapData->secondaryTileset->metatileAttributes;
+        return attributes[metatile - 0x200];
+    }
+    else
+    {
+        return 0xff;
+    }
+}
+
+void save_serialize_map(void)
+{
+    int i, j;
+    int x, y;
+    u16 *mapView;
+    int width;
+    mapView = gSaveBlock1Ptr->mapView;
+    width = gUnknown_03005DC0.width;
+    x = gSaveBlock1Ptr->pos.x;
+    y = gSaveBlock1Ptr->pos.y;
+    for (i = y; i < y + 14; i++)
+    {
+        for (j = x; j < x + 15; j++)
+        {
+            *mapView++ = gUnknown_02032318[width * i + j];
+        }
+    }
+}
+
+int sub_8088438(void)
+{
+    u16 i;
+    u32 r2;
+    r2 = 0;
+    for (i = 0; i < 0x200; i++)
+    {
+        r2 |= gSaveBlock1Ptr->mapView[i];
+    }
+    if (r2 == 0)
+    {
+        return 1;
+    }
+    return 0;
+}
+
+void sav2_mapdata_clear(void)
+{
+    CpuFill16(0, gSaveBlock1Ptr->mapView, sizeof(gSaveBlock1Ptr->mapView));
+}
+
+void mapdata_from_sav2(void)
+{
+    u8 a0;
+    int i, j;
+    int x, y;
+    u16 *mapView;
+    int width;
+    mapView = gSaveBlock1Ptr->mapView;
+    if (!sub_8088438())
+    {
+        width = gUnknown_03005DC0.width;
+        x = gSaveBlock1Ptr->pos.x;
+        y = gSaveBlock1Ptr->pos.y;
+        for (i = y; i < y + 14; i++)
+        {
+            if (i == y && i != 0)
+                a0 = 0;
+            else if (i == y + 13 && i != gMapHeader.mapData->height - 1)
+                a0 = 1;
+            else
+                a0 = -1;
+            
+            for (j = x; j < x + 15; j++)
+            {
+                if (!sub_8088BF0(&gUnknown_02032318[j + width * i], width, a0))
+                    gUnknown_02032318[j + width * i] = *mapView;
+                mapView++;
+            }
+        }
+        for (j = x; j < x + 15; j++)
+        {
+            if (y != 0)
+                sub_80D423C(j, y - 1);
+            if (i < gMapHeader.mapData->height - 1)
+                sub_80D42B8(j, y + 13);
+        }
+        sav2_mapdata_clear();
+    }
+}
+
+void sub_80885C4(u8 a1)
+{
+    int width;
+    u16 *mapView;
+    int x0, y0;
+    int x2, y2;
+    u16 *src, *dest;
+    int srci, desti;
+    int r9, r8;
+    int x, y;
+    int i, j;
+    mapView = gSaveBlock1Ptr->mapView;
+    width = gUnknown_03005DC0.width;
+    r9 = 0;
+    r8 = 0;
+    x0 = gSaveBlock1Ptr->pos.x;
+    y0 = gSaveBlock1Ptr->pos.y;
+    x2 = 15;
+    y2 = 14;
+    switch (a1)
+    {
+    case CONNECTION_NORTH:
+        y0 += 1;
+        y2 = 13;
+        break;
+    case CONNECTION_SOUTH:
+        r8 = 1;
+        y2 = 13;
+        break;
+    case CONNECTION_WEST:
+        x0 += 1;
+        x2 = 14;
+        break;
+    case CONNECTION_EAST:
+        r9 = 1;
+        x2 = 14;
+        break;
+    }
+    for (y = 0; y < y2; y++)
+    {
+        i = 0;
+        j = 0;
+        for (x = 0; x < x2; x++)
+        {
+            desti = width * (y + y0);
+            srci = (y + r8) * 15 + r9;
+            src = &mapView[srci + i];
+            dest = &gUnknown_02032318[x0 + desti + j];
+            *dest = *src;
+            i++;
+            j++;
+        }
+    }
+    sav2_mapdata_clear();
+}
+
+int GetMapBorderIdAt(int x, int y)
+{
+    struct MapData const *mapData;
+    u16 block, block2;
+    int i, j;
+    if (x >= 0 && x < gUnknown_03005DC0.width
+     && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        i = gUnknown_03005DC0.width;
+        i *= y;
+        block = gUnknown_03005DC0.map[x + i];
+        if (block == 0x3ff)
+        {
+            goto fail;
+        }
+    }
+    else
+    {
+        mapData = gMapHeader.mapData;
+        j = (x + 1) & 1;
+        j += ((y + 1) & 1) * 2;
+        block2 = 0xc00 | mapData->border[j];
+        if (block2 == 0x3ff)
+        {
+            goto fail;
+        }
+    }
+    goto success;
+fail:
+    return -1;
+success:
+
+    if (x >= (gUnknown_03005DC0.width - 8))
+    {
+        if (!gUnknown_02037340.east)
+        {
+            return -1;
+        }
+        return CONNECTION_EAST;
+    }
+    else if (x < 7)
+    {
+        if (!gUnknown_02037340.west)
+        {
+            return -1;
+        }
+        return CONNECTION_WEST;
+    }
+    else if (y >= (gUnknown_03005DC0.height - 7))
+    {
+        if (!gUnknown_02037340.south)
+        {
+            return -1;
+        }
+        return CONNECTION_SOUTH;
+    }
+    else if (y < 7)
+    {
+        if (!gUnknown_02037340.north)
+        {
+            return -1;
+        }
+        return CONNECTION_NORTH;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+int GetPostCameraMoveMapBorderId(int x, int y)
+{
+    return GetMapBorderIdAt(gSaveBlock1Ptr->pos.x + 7 + x, gSaveBlock1Ptr->pos.y + 7 + y);
+}
+
+int CanCameraMoveInDirection(int direction)
+{
+    int x, y;
+    x = gSaveBlock1Ptr->pos.x + 7 + gUnknown_08339D64[direction].x;
+    y = gSaveBlock1Ptr->pos.y + 7 + gUnknown_08339D64[direction].y;
+    if (GetMapBorderIdAt(x, y) == -1)
+    {
+        return 0;
+    }
+    return 1;
+}
+
+void sub_80887F8(struct MapConnection *connection, int direction, int x, int y)
+{
+    struct MapHeader const *mapHeader;
+    mapHeader = mapconnection_get_mapheader(connection);
+    switch (direction)
+    {
+    case CONNECTION_EAST:
+        gSaveBlock1Ptr->pos.x = -x;
+        gSaveBlock1Ptr->pos.y -= connection->offset;
+        break;
+    case CONNECTION_WEST:
+        gSaveBlock1Ptr->pos.x = mapHeader->mapData->width;
+        gSaveBlock1Ptr->pos.y -= connection->offset;
+        break;
+    case CONNECTION_SOUTH:
+        gSaveBlock1Ptr->pos.x -= connection->offset;
+        gSaveBlock1Ptr->pos.y = -y;
+        break;
+    case CONNECTION_NORTH:
+        gSaveBlock1Ptr->pos.x -= connection->offset;
+        gSaveBlock1Ptr->pos.y = mapHeader->mapData->height;
+        break;
+    }
+}
+
+bool8 CameraMove(int x, int y)
+{
+    unsigned int direction;
+    struct MapConnection *connection;
+    int old_x, old_y;
+    gCamera.active = FALSE;
+    direction = GetPostCameraMoveMapBorderId(x, y);
+    if (direction + 1 <= 1)
+    {
+        gSaveBlock1Ptr->pos.x += x;
+        gSaveBlock1Ptr->pos.y += y;
+    }
+    else
+    {
+        save_serialize_map();
+        sub_81BE72C();
+        old_x = gSaveBlock1Ptr->pos.x;
+        old_y = gSaveBlock1Ptr->pos.y;
+        connection = sub_8088950(direction, gSaveBlock1Ptr->pos.x, gSaveBlock1Ptr->pos.y);
+        sub_80887F8(connection, direction, x, y);
+        mliX_load_map(connection->mapGroup, connection->mapNum);
+        gCamera.active = TRUE;
+        gCamera.x = old_x - gSaveBlock1Ptr->pos.x;
+        gCamera.y = old_y - gSaveBlock1Ptr->pos.y;
+        gSaveBlock1Ptr->pos.x += x;
+        gSaveBlock1Ptr->pos.y += y;
+        sub_80885C4(direction);
+    }
+    return gCamera.active;
+}
+
+struct MapConnection *sub_8088950(u8 direction, int x, int y)
+{
+    int count;
+    struct MapConnection *connection;
+    int i;
+    count = gMapHeader.connections->count;
+    connection = gMapHeader.connections->connections;
+    for (i = 0; i < count; i++, connection++)
+    {
+        if (connection->direction == direction && sub_80889A8(direction, x, y, connection) == TRUE)
+            return connection;
+    }
+    return NULL;
+}
+
+bool8 sub_80889A8(u8 direction, int x, int y, struct MapConnection *connection)
+{
+    struct MapHeader const *mapHeader;
+    mapHeader = mapconnection_get_mapheader(connection);
+    switch (direction)
+    {
+    case CONNECTION_SOUTH:
+    case CONNECTION_NORTH:
+        return sub_8088A0C(x, gMapHeader.mapData->width, mapHeader->mapData->width, connection->offset);
+    case CONNECTION_WEST:
+    case CONNECTION_EAST:
+        return sub_8088A0C(y, gMapHeader.mapData->height, mapHeader->mapData->height, connection->offset);
+    }
+    return FALSE;
+}
+
+bool8 sub_8088A0C(int x, int src_width, int dest_width, int offset)
+{
+    int offset2;
+    offset2 = offset;
+
+    if (offset2 < 0)
+        offset2 = 0;
+
+    if (dest_width + offset < src_width)
+        src_width = dest_width + offset;
+
+    if (offset2 <= x && x <= src_width)
+        return TRUE;
+
+    return FALSE;
+}
+
+int sub_8088A38(int x, int width)
+{
+    if (x >= 0 && x < width)
+        return TRUE;
+
+    return FALSE;
+}
+
+int sub_8088A4C(struct MapConnection *connection, int x, int y)
+{
+    struct MapHeader const *mapHeader;
+    mapHeader = mapconnection_get_mapheader(connection);
+    switch (connection->direction)
+    {
+    case CONNECTION_SOUTH:
+    case CONNECTION_NORTH:
+        return sub_8088A38(x - connection->offset, mapHeader->mapData->width);
+    case CONNECTION_WEST:
+    case CONNECTION_EAST:
+        return sub_8088A38(y - connection->offset, mapHeader->mapData->height);
+    }
+    return FALSE;
+}
+
+struct MapConnection *sub_8088A8C(s16 x, s16 y)
+{
+    int count;
+    struct MapConnection *connection;
+    int i;
+    u8 direction;
+    if (!gMapHeader.connections)
+    {
+        return NULL;
+    }
+    else
+    {
+        count = gMapHeader.connections->count;
+        connection = gMapHeader.connections->connections;
+        for (i = 0; i < count; i++, connection++)
+        {
+            direction = connection->direction;
+            if ((direction == CONNECTION_DIVE || direction == CONNECTION_EMERGE)
+             || (direction == CONNECTION_NORTH && y > 6)
+             || (direction == CONNECTION_SOUTH && y < gMapHeader.mapData->height + 7)
+             || (direction == CONNECTION_WEST && x > 6)
+             || (direction == CONNECTION_EAST && x < gMapHeader.mapData->width + 7))
+            {
+                continue;
+            }
+            if (sub_8088A4C(connection, x - 7, y - 7) == TRUE)
+            {
+                return connection;
+            }
+        }
+    }
+    return NULL;
+}
+
+void sub_8088B3C(u16 x, u16 y)
+{
+    gSaveBlock1Ptr->pos.x = x - 7;
+    gSaveBlock1Ptr->pos.y = y - 7;
+}
+
+void sav1_camera_get_focus_coords(u16 *x, u16 *y)
+{
+    *x = gSaveBlock1Ptr->pos.x + 7;
+    *y = gSaveBlock1Ptr->pos.y + 7;
+}
+
+void SetCameraCoords(u16 x, u16 y)
+{
+    gSaveBlock1Ptr->pos.x = x;
+    gSaveBlock1Ptr->pos.y = y;
+}
+
+void GetCameraCoords(u16 *x, u16 *y)
+{
+    *x = gSaveBlock1Ptr->pos.x;
+    *y = gSaveBlock1Ptr->pos.y;
+}
+
+void sub_8088B94(int x, int y, int a2)
+{
+    if (x >= 0 && x < gUnknown_03005DC0.width && y >= 0 && y < gUnknown_03005DC0.height)
+    {
+        if (a2 != 0)
+            gUnknown_03005DC0.map[x + gUnknown_03005DC0.width * y] |= 0xC00;
+        else
+            gUnknown_03005DC0.map[x + gUnknown_03005DC0.width * y] &= 0xF3FF;
+    }
+}
+
+bool8 sub_8088BF0(u16* a0, u16 a1, u8 a2)
+{
+    if (a2 == 0xFF)
+        return FALSE;
+    
+    if (a2 == 0)
+        a0 -= a1;
+    else
+        a0 += a1;
+
+    if (sub_80FADE4(*a0 & 0x3FF, a2) == 1)
+        return TRUE;
+    return FALSE;
+}
+
+void copy_tileset_patterns_to_vram(struct Tileset const *tileset, u16 numTiles, u16 offset)
+{
+    if (tileset)
+    {
+        if (!tileset->isCompressed)
+            LoadBgTiles(2, tileset->tiles, numTiles * 32, offset);
+        else
+            decompress_and_copy_tile_data_to_vram(2, tileset->tiles, numTiles * 32, offset, 0);
+    }
+}
+
+void copy_tileset_patterns_to_vram2(struct Tileset const *tileset, u16 numTiles, u16 offset)
+{
+    if (tileset)
+    {
+        if (!tileset->isCompressed)
+            LoadBgTiles(2, tileset->tiles, numTiles * 32, offset);
+        else
+            copy_decompressed_tile_data_to_vram_autofree(2, tileset->tiles, numTiles * 32, offset, 0);
+    }
+}
+
+void nullsub_3(u16 a0, u16 a1)
+{
+
+}
+
+void nullsub_90(void)
+{
+
+}
+
+void apply_map_tileset_palette(struct Tileset const *tileset, u16 destOffset, u16 size)
+{
+    u16 black = RGB_BLACK;
+
+    if (tileset)
+    {
+        if (tileset->isSecondary == FALSE)
+        {
+            LoadPalette(&black, destOffset, 2);
+            LoadPalette(((u16*)tileset->palettes) + 1, destOffset + 1, size - 2);
+            nullsub_3(destOffset + 1, (size - 2) >> 1);
+        }
+        else if (tileset->isSecondary == TRUE)
+        {
+            LoadPalette(((u16*)tileset->palettes) + 0x60, destOffset, size);
+            nullsub_3(destOffset, size >> 1);
+        }
+        else
+        {
+            LoadCompressedPalette((u16*)tileset->palettes, destOffset, size);
+            nullsub_3(destOffset, size >> 1);
+        }
+    }
+}
+
+void copy_map_tileset1_to_vram(struct MapData const *mapData)
+{
+    copy_tileset_patterns_to_vram(mapData->primaryTileset, 0x200, 0);
+}
+
+void copy_map_tileset2_to_vram(struct MapData const *mapData)
+{
+    copy_tileset_patterns_to_vram(mapData->secondaryTileset, 0x200, 0x200);
+}
+
+void copy_map_tileset2_to_vram_2(struct MapData const *mapData)
+{
+    copy_tileset_patterns_to_vram2(mapData->secondaryTileset, 0x200, 0x200);
+}
+
+void apply_map_tileset1_palette(struct MapData const *mapData)
+{
+    apply_map_tileset_palette(mapData->primaryTileset, 0, 0xC0);
+}
+
+void apply_map_tileset2_palette(struct MapData const *mapData)
+{
+    apply_map_tileset_palette(mapData->secondaryTileset, 0x60, 0xE0);
+}
+
+void copy_map_tileset1_tileset2_to_vram(struct MapData const *mapData)
+{
+    if (mapData)
+    {
+        copy_tileset_patterns_to_vram2(mapData->primaryTileset, 0x200, 0);
+        copy_tileset_patterns_to_vram2(mapData->secondaryTileset, 0x200, 0x200);
+    }
+}
+
+void apply_map_tileset1_tileset2_palette(struct MapData const *mapData)
+{
+    if (mapData)
+    {
+        apply_map_tileset1_palette(mapData);
+        apply_map_tileset2_palette(mapData);
+    }
+}