remove subdirectories

1 files changed, 1803 insertions, 0 deletions

diff --git a/src/sprite.c b/src/sprite.c
new file mode 100644
index 000000000..a9d84e01a
--- /dev/null
+++ b/src/sprite.c
@@ -0,0 +1,1803 @@
+#include "global.h"
+#include "debug.h"
+#include "sprite.h"
+#include "main.h"
+#include "menu_cursor.h"
+#include "palette.h"
+#include "sprite.h"
+
+#define MAX_SPRITE_COPY_REQUESTS 64
+
+#define OAM_MATRIX_COUNT 32
+
+#define SET_SPRITE_TILE_RANGE(index, start, count) \
+{                                                  \
+    sSpriteTileRanges[index * 2] = start;          \
+    (sSpriteTileRanges + 1)[index * 2] = count;    \
+}
+
+#define ALLOC_SPRITE_TILE(n)                             \
+{                                                        \
+    gSpriteTileAllocBitmap[(n) / 8] |= (1 << ((n) % 8)); \
+}
+
+#define FREE_SPRITE_TILE(n)                               \
+{                                                         \
+    gSpriteTileAllocBitmap[(n) / 8] &= ~(1 << ((n) % 8)); \
+}
+
+#define SPRITE_TILE_IS_ALLOCATED(n) ((gSpriteTileAllocBitmap[(n) / 8] >> ((n) % 8)) & 1)
+
+struct SpriteCopyRequest
+{
+    const u8 *src;
+    u8 *dest;
+    u16 size;
+};
+
+struct OamDimensions
+{
+    s8 width;
+    s8 height;
+};
+
+static void UpdateOamCoords(void);
+static void BuildSpritePriorities(void);
+static void SortSprites(void);
+static void CopyMatricesToOamBuffer(void);
+static void AddSpritesToOamBuffer(void);
+static u8 CreateSpriteAt(u8 index, const struct SpriteTemplate *template, s16 x, s16 y, u8 subpriority);
+static void ClearSpriteCopyRequests(void);
+static void ResetOamMatrices(void);
+static void ResetSprite(struct Sprite *sprite);
+static s16 AllocSpriteTiles(u16 tileCount);
+static void RequestSpriteFrameImageCopy(u16 index, u16 tileNum, const struct SpriteFrameImage *images);
+static void ResetAllSprites(void);
+static void BeginAnim(struct Sprite *sprite);
+static void ContinueAnim(struct Sprite *sprite);
+static void AnimCmd_frame(struct Sprite *sprite);
+static void AnimCmd_end(struct Sprite *sprite);
+static void AnimCmd_jump(struct Sprite *sprite);
+static void AnimCmd_loop(struct Sprite *sprite);
+static void BeginAnimLoop(struct Sprite *sprite);
+static void ContinueAnimLoop(struct Sprite *sprite);
+static void JumpToTopOfAnimLoop(struct Sprite *sprite);
+static void BeginAffineAnim(struct Sprite *sprite);
+static void ContinueAffineAnim(struct Sprite *sprite);
+static void AffineAnimDelay(u8 matrixNum, struct Sprite *sprite);
+static void AffineAnimCmd_loop(u8 matrixNum, struct Sprite *sprite);
+static void BeginAffineAnimLoop(u8 matrixNum, struct Sprite *sprite);
+static void ContinueAffineAnimLoop(u8 matrixNum, struct Sprite *sprite);
+static void JumpToTopOfAffineAnimLoop(u8 matrixNum, struct Sprite *sprite);
+static void AffineAnimCmd_jump(u8 matrixNum, struct Sprite *sprite);
+static void AffineAnimCmd_end(u8 matrixNum, struct Sprite *sprite);
+static void AffineAnimCmd_frame(u8 matrixNum, struct Sprite *sprite);
+static void CopyOamMatrix(u8 destMatrixIndex, struct OamMatrix *srcMatrix);
+static u8 GetSpriteMatrixNum(struct Sprite *sprite);
+static void SetSpriteOamFlipBits(struct Sprite *sprite, u8 hFlip, u8 vFlip);
+static void AffineAnimStateRestartAnim(u8 matrixNum);
+static void AffineAnimStateStartAnim(u8 matrixNum, u8 animNum);
+static void AffineAnimStateReset(u8 matrixNum);
+static void ApplyAffineAnimFrameAbsolute(u8 matrixNum, struct AffineAnimFrameCmd *frameCmd);
+static void DecrementAnimDelayCounter(struct Sprite *sprite);
+static bool8 DecrementAffineAnimDelayCounter(struct Sprite *sprite, u8 matrixNum);
+static void ApplyAffineAnimFrameRelativeAndUpdateMatrix(u8 matrixNum, struct AffineAnimFrameCmd *frameCmd);
+static s16 ConvertScaleParam(s16 scale);
+static void GetAffineAnimFrame(u8 matrixNum, struct Sprite *sprite, struct AffineAnimFrameCmd *frameCmd);
+static void ApplyAffineAnimFrame(u8 matrixNum, struct AffineAnimFrameCmd *frameCmd);
+static void ResetAffineAnimData(void);
+static u8 IndexOfSpriteTileTag(u16 tag);
+static void AllocSpriteTileRange(u16 tag, u16 start, u16 count);
+static void DoLoadSpritePalette(const u16 *src, u16 paletteOffset);
+
+typedef void (*AnimFunc)(struct Sprite *);
+typedef void (*AnimCmdFunc)(struct Sprite *);
+typedef void (*AffineAnimCmdFunc)(u8 matrixNum, struct Sprite *);
+
+#define DUMMY_OAM_DATA        \
+{                             \
+    160, /* Y (off-screen) */ \
+    0,                        \
+    0,                        \
+    0,                        \
+    0,                        \
+    0,                        \
+    304, /* X */              \
+    0,                        \
+    0,                        \
+    0,                        \
+    3, /* lowest priority */  \
+    0,                        \
+    0                         \
+}
+
+#define ANIM_END        0xFFFF
+#define AFFINE_ANIM_END 0x7FFF
+
+// forward declarations
+const union AnimCmd * const gDummySpriteAnimTable[];
+const union AffineAnimCmd * const gDummySpriteAffineAnimTable[];
+const struct SpriteTemplate gDummySpriteTemplate;
+
+// Unreferenced error message.
+// It means "The DMA transfer request table has exceeded its limit."
+static const u8 sDmaOverErrorMsg[] =
+    _(
+    "DMA OVER\n"
+    "DMAてんそう\n"
+    "リクエストテーブルが\n"
+    "オーバーしました"
+    );
+
+// Unreferenced data.
+static const u8 sUnknownData[24] =
+{
+    0x01, 0x04, 0x10, 0x40,
+    0x02, 0x04, 0x08, 0x20,
+    0x02, 0x04, 0x08, 0x20,
+    0x01, 0x04, 0x10, 0x40,
+    0x02, 0x04, 0x08, 0x20,
+    0x02, 0x04, 0x08, 0x20,
+};
+
+static const u8 sCenterToCornerVecTable[3][4][2] =
+{
+    {   // square
+        {  -4,  -4 },
+        {  -8,  -8 },
+        { -16, -16 },
+        { -32, -32 },
+    },
+    {   // horizontal rectangle
+        {  -8,  -4 },
+        { -16,  -4 },
+        { -16,  -8 },
+        { -32, -16 },
+    },
+    {   // vertical rectangle
+        {  -4,  -8 },
+        {  -4, -16 },
+        {  -8, -16 },
+        { -16, -32 },
+    },
+};
+
+static const struct Sprite sDummySprite =
+{
+    .oam = DUMMY_OAM_DATA,
+    .anims = gDummySpriteAnimTable,
+    .images = NULL,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .template = &gDummySpriteTemplate,
+    .subspriteTables = NULL,
+    .callback = SpriteCallbackDummy,
+    .pos1 = { 304, 160 },
+    .pos2 = {   0,   0 },
+    .centerToCornerVecX = 0,
+    .centerToCornerVecY = 0,
+    .animNum = 0,
+    .animCmdIndex = 0,
+    .animDelayCounter = 0,
+    .animPaused = 0,
+    .affineAnimPaused = 0,
+    .animLoopCounter = 0,
+    .data = {0},
+    .inUse = 0,
+    .coordOffsetEnabled = 0,
+    .invisible = 0,
+    .flags_3 = 0,
+    .flags_4 = 0,
+    .flags_5 = 0,
+    .flags_6 = 0,
+    .flags_7 = 0,
+    .hFlip = 0,
+    .vFlip = 0,
+    .animBeginning = 0,
+    .affineAnimBeginning = 0,
+    .animEnded = 0,
+    .affineAnimEnded = 0,
+    .usingSheet = 0,
+    .flags_f = 0,
+    .sheetTileStart = 0,
+    .subspriteTableNum = 0,
+    .subspriteMode = 0,
+    .subpriority = 0xFF
+};
+
+const struct OamData gDummyOamData = DUMMY_OAM_DATA;
+
+static const union AnimCmd sDummyAnim = { ANIM_END };
+
+const union AnimCmd * const gDummySpriteAnimTable[] = { &sDummyAnim };
+
+static const union AffineAnimCmd sDummyAffineAnim = { AFFINE_ANIM_END };
+
+const union AffineAnimCmd * const gDummySpriteAffineAnimTable[] = { &sDummyAffineAnim };
+
+const struct SpriteTemplate gDummySpriteTemplate =
+{
+    .tileTag = 0,
+    .paletteTag = 0xFFFF,
+    .oam = &gDummyOamData,
+    .anims = gDummySpriteAnimTable,
+    .images = NULL,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = SpriteCallbackDummy
+};
+
+// TODO: Find out what these are used for.
+static const u16 sOamBitmasks[9] =
+{
+    0xFF00, 0x00FF, 0x001F,
+    0xFE00, 0x01FF, 0x03E0,
+    0xFC00, 0x03FF, 0xFC00,
+};
+
+static const AnimFunc sAnimFuncs[] =
+{
+    ContinueAnim,
+    BeginAnim,
+};
+
+static const AnimFunc sAffineAnimFuncs[] =
+{
+    ContinueAffineAnim,
+    BeginAffineAnim,
+};
+
+static const AnimCmdFunc sAnimCmdFuncs[] =
+{
+    AnimCmd_loop,
+    AnimCmd_jump,
+    AnimCmd_end,
+    AnimCmd_frame,
+};
+
+static const AffineAnimCmdFunc sAffineAnimCmdFuncs[] =
+{
+    AffineAnimCmd_loop,
+    AffineAnimCmd_jump,
+    AffineAnimCmd_end,
+    AffineAnimCmd_frame,
+};
+
+static const struct OamDimensions sOamDimensions[3][4] =
+{
+    {   // square
+        {  8,  8 },
+        { 16, 16 },
+        { 32, 32 },
+        { 64, 64 },
+    },
+    {   // horizontal rectangle
+        { 16,  8 },
+        { 32,  8 },
+        { 32, 16 },
+        { 64, 32 },
+    },
+    {   // vertical rectangle
+        {  8, 16 },
+        {  8, 32 },
+        { 16, 32 },
+        { 32, 64 },
+    },
+};
+
+static u16 sSpriteTileRangeTags[MAX_SPRITES];
+static u16 sSpriteTileRanges[MAX_SPRITES * 2];
+static struct AffineAnimState sAffineAnimStates[OAM_MATRIX_COUNT];
+static u16 sSpritePaletteTags[16];
+
+u8 gSpriteOrder[MAX_SPRITES];
+bool8 gShouldProcessSpriteCopyRequests;
+u8 gSpriteCopyRequestCount;
+struct SpriteCopyRequest gSpriteCopyRequests[MAX_SPRITE_COPY_REQUESTS];
+u8 gOamLimit;
+u16 gReservedSpriteTileCount;
+u8 gSpriteTileAllocBitmap[128];
+s16 gSpriteCoordOffsetX;
+s16 gSpriteCoordOffsetY;
+u32 gOamMatrixAllocBitmap;
+struct OamMatrix gOamMatrices[OAM_MATRIX_COUNT];
+u8 gReservedSpritePaletteCount;
+
+EWRAM_DATA struct Sprite gSprites[MAX_SPRITES + 1] = {0};
+EWRAM_DATA u16 gSpritePriorities[MAX_SPRITES] = {0};
+EWRAM_DATA u8 gAffineAnimsDisabled = {0};
+
+void ResetSpriteData(void)
+{
+    ResetOamRange(0, 128);
+    ResetAllSprites();
+    ClearSpriteCopyRequests();
+    ResetAffineAnimData();
+    FreeSpriteTileRanges();
+    gOamLimit = 64;
+    gReservedSpriteTileCount = 0;
+    AllocSpriteTiles(0);
+    gSpriteCoordOffsetX = 0;
+    gSpriteCoordOffsetY = 0;
+}
+
+void AnimateSprites(void)
+{
+    u8 i;
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+
+        if (sprite->inUse)
+        {
+            sprite->callback(sprite);
+
+            if (sprite->inUse)
+                AnimateSprite(sprite);
+        }
+    }
+}
+
+void BuildOamBuffer(void)
+{
+    u8 temp;
+    UpdateOamCoords();
+    BuildSpritePriorities();
+    SortSprites();
+    temp = gMain.oamLoadDisabled;
+    gMain.oamLoadDisabled = TRUE;
+    AddSpritesToOamBuffer();
+    CopyMatricesToOamBuffer();
+    gMain.oamLoadDisabled = temp;
+    gShouldProcessSpriteCopyRequests = TRUE;
+}
+
+static void UpdateOamCoords(void)
+{
+    u8 i;
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        if (sprite->inUse && !sprite->invisible)
+        {
+            if (sprite->coordOffsetEnabled)
+            {
+                sprite->oam.x = sprite->pos1.x + sprite->pos2.x + sprite->centerToCornerVecX + gSpriteCoordOffsetX;
+                sprite->oam.y = sprite->pos1.y + sprite->pos2.y + sprite->centerToCornerVecY + gSpriteCoordOffsetY;
+            }
+            else
+            {
+                sprite->oam.x = sprite->pos1.x + sprite->pos2.x + sprite->centerToCornerVecX;
+                sprite->oam.y = sprite->pos1.y + sprite->pos2.y + sprite->centerToCornerVecY;
+            }
+        }
+    }
+}
+
+static void BuildSpritePriorities(void)
+{
+    u16 i;
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        u16 priority = sprite->subpriority | (sprite->oam.priority << 8);
+        gSpritePriorities[i] = priority;
+    }
+}
+
+static void SortSprites(void)
+{
+    u8 i;
+    for (i = 1; i < MAX_SPRITES; i++)
+    {
+        u8 j = i;
+        struct Sprite *sprite1 = &gSprites[gSpriteOrder[i - 1]];
+        struct Sprite *sprite2 = &gSprites[gSpriteOrder[i]];
+        u16 sprite1Priority = gSpritePriorities[gSpriteOrder[i - 1]];
+        u16 sprite2Priority = gSpritePriorities[gSpriteOrder[i]];
+        s16 sprite1Y = sprite1->oam.y;
+        s16 sprite2Y = sprite2->oam.y;
+
+        if (sprite1Y >= DISPLAY_HEIGHT)
+            sprite1Y = sprite1Y - 256;
+
+        if (sprite2Y >= DISPLAY_HEIGHT)
+            sprite2Y = sprite2Y - 256;
+
+        if (sprite1->oam.affineMode == ST_OAM_AFFINE_DOUBLE
+         && sprite1->oam.size == 3)
+        {
+            u32 shape = sprite1->oam.shape;
+            if (shape == ST_OAM_SQUARE || shape == 2)
+            {
+                if (sprite1Y > 128)
+                    sprite1Y = sprite1Y - 256;
+            }
+        }
+
+        if (sprite2->oam.affineMode == ST_OAM_AFFINE_DOUBLE
+         && sprite2->oam.size == 3)
+        {
+            u32 shape = sprite2->oam.shape;
+            if (shape == ST_OAM_SQUARE || shape == ST_OAM_V_RECTANGLE)
+            {
+                if (sprite2Y > 128)
+                    sprite2Y = sprite2Y - 256;
+            }
+        }
+
+        while (j > 0
+            && ((sprite1Priority > sprite2Priority)
+             || (sprite1Priority == sprite2Priority && sprite1Y < sprite2Y)))
+        {
+            u8 temp = gSpriteOrder[j];
+            gSpriteOrder[j] = gSpriteOrder[j - 1];
+            gSpriteOrder[j - 1] = temp;
+
+            // UB: If j equals 1, then j-- makes j equal 0.
+            // Then, gSpriteOrder[-1] gets accessed below.
+            // Although this doesn't result in a bug in the ROM,
+            // the behavior is undefined.
+            j--;
+
+            sprite1 = &gSprites[gSpriteOrder[j - 1]];
+            sprite2 = &gSprites[gSpriteOrder[j]];
+            sprite1Priority = gSpritePriorities[gSpriteOrder[j - 1]];
+            sprite2Priority = gSpritePriorities[gSpriteOrder[j]];
+            sprite1Y = sprite1->oam.y;
+            sprite2Y = sprite2->oam.y;
+
+            if (sprite1Y >= DISPLAY_HEIGHT)
+                sprite1Y = sprite1Y - 256;
+
+            if (sprite2Y >= DISPLAY_HEIGHT)
+                sprite2Y = sprite2Y - 256;
+
+            if (sprite1->oam.affineMode == ST_OAM_AFFINE_DOUBLE
+             && sprite1->oam.size == 3)
+            {
+                u32 shape = sprite1->oam.shape;
+                if (shape == ST_OAM_SQUARE || shape == ST_OAM_V_RECTANGLE)
+                {
+                    if (sprite1Y > 128)
+                        sprite1Y = sprite1Y - 256;
+                }
+            }
+
+            if (sprite2->oam.affineMode == ST_OAM_AFFINE_DOUBLE
+             && sprite2->oam.size == 3)
+            {
+                u32 shape = sprite2->oam.shape;
+                if (shape == ST_OAM_SQUARE || shape == ST_OAM_V_RECTANGLE)
+                {
+                    if (sprite2Y > 128)
+                        sprite2Y = sprite2Y - 256;
+                }
+            }
+        }
+    }
+}
+
+static void CopyMatricesToOamBuffer(void)
+{
+    u8 i;
+    for (i = 0; i < OAM_MATRIX_COUNT; i++)
+    {
+        u32 base = 4 * i;
+        gMain.oamBuffer[base + 0].affineParam = gOamMatrices[i].a;
+        gMain.oamBuffer[base + 1].affineParam = gOamMatrices[i].b;
+        gMain.oamBuffer[base + 2].affineParam = gOamMatrices[i].c;
+        gMain.oamBuffer[base + 3].affineParam = gOamMatrices[i].d;
+    }
+}
+
+static void AddSpritesToOamBuffer(void)
+{
+    u8 i = 0;
+    u8 oamIndex = 0;
+
+    while (i < MAX_SPRITES)
+    {
+        struct Sprite *sprite = &gSprites[gSpriteOrder[i]];
+        if (sprite->inUse && !sprite->invisible && AddSpriteToOamBuffer(sprite, &oamIndex))
+            break;
+        i++;
+    }
+
+    gMain.objCount = oamIndex;
+
+    while (oamIndex < gOamLimit)
+    {
+        gMain.oamBuffer[oamIndex] = gDummyOamData;
+        oamIndex++;
+    }
+}
+
+u8 CreateSprite(const struct SpriteTemplate *template, s16 x, s16 y, u8 subpriority)
+{
+    u8 i;
+
+    for (i = 0; i < MAX_SPRITES; i++)
+        if (!gSprites[i].inUse)
+            return CreateSpriteAt(i, template, x, y, subpriority);
+
+    return MAX_SPRITES;
+}
+
+u8 CreateSpriteAtEnd(const struct SpriteTemplate *template, s16 x, s16 y, u8 subpriority)
+{
+    s16 i;
+
+    for (i = MAX_SPRITES - 1; i > -1; i--)
+        if (!gSprites[i].inUse)
+            return CreateSpriteAt(i, template, x, y, subpriority);
+
+    return MAX_SPRITES;
+}
+
+u8 CreateInvisibleSprite(void (*callback)(struct Sprite *))
+{
+    u8 index = CreateSprite(&gDummySpriteTemplate, 0, 0, 31);
+
+    if (index == MAX_SPRITES)
+    {
+        return MAX_SPRITES;
+    }
+    else
+    {
+        gSprites[index].invisible = TRUE;
+        gSprites[index].callback = callback;
+        return index;
+    }
+}
+
+static u8 CreateSpriteAt(u8 index, const struct SpriteTemplate *template, s16 x, s16 y, u8 subpriority)
+{
+    struct Sprite *sprite = &gSprites[index];
+
+    ResetSprite(sprite);
+
+    sprite->inUse = TRUE;
+    sprite->animBeginning = TRUE;
+    sprite->affineAnimBeginning = TRUE;
+    sprite->usingSheet = TRUE;
+
+    sprite->subpriority = subpriority;
+    sprite->oam = *template->oam;
+    sprite->anims = template->anims;
+    sprite->affineAnims = template->affineAnims;
+    sprite->template = template;
+    sprite->callback = template->callback;
+    sprite->pos1.x = x;
+    sprite->pos1.y = y;
+
+    CalcCenterToCornerVec(sprite, sprite->oam.shape, sprite->oam.size, sprite->oam.affineMode);
+
+    if (template->tileTag == 0xFFFF)
+    {
+        s16 tileNum;
+        sprite->images = template->images;
+        tileNum = AllocSpriteTiles((u8)(sprite->images->size / TILE_SIZE_4BPP));
+        if (tileNum == -1)
+        {
+            ResetSprite(sprite);
+            return MAX_SPRITES;
+        }
+        sprite->oam.tileNum = tileNum;
+        sprite->usingSheet = FALSE;
+        sprite->sheetTileStart = 0;
+    }
+    else
+    {
+        sprite->sheetTileStart = GetSpriteTileStartByTag(template->tileTag);
+        SetSpriteSheetFrameTileNum(sprite);
+    }
+
+    if (sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK)
+        InitSpriteAffineAnim(sprite);
+
+    if (template->paletteTag != 0xFFFF)
+        sprite->oam.paletteNum = IndexOfSpritePaletteTag(template->paletteTag);
+
+    return index;
+}
+
+u8 CreateSpriteAndAnimate(const struct SpriteTemplate *template, s16 x, s16 y, u8 subpriority)
+{
+    u8 i;
+
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+
+        if (!gSprites[i].inUse)
+        {
+            u8 index = CreateSpriteAt(i, template, x, y, subpriority);
+
+            if (index == MAX_SPRITES)
+                return MAX_SPRITES;
+
+            gSprites[i].callback(sprite);
+
+            if (gSprites[i].inUse)
+                AnimateSprite(sprite);
+
+            return index;
+        }
+    }
+
+    return MAX_SPRITES;
+}
+
+void DestroySprite(struct Sprite *sprite)
+{
+    if (sprite->inUse)
+    {
+        if (!sprite->usingSheet)
+        {
+            u16 i;
+            u16 tileEnd = (sprite->images->size / TILE_SIZE_4BPP) + sprite->oam.tileNum;
+            for (i = sprite->oam.tileNum; i < tileEnd; i++)
+                FREE_SPRITE_TILE(i);
+        }
+        ResetSprite(sprite);
+    }
+}
+
+void ResetOamRange(u8 a, u8 b)
+{
+    u8 i;
+
+    for (i = a; i < b; i++)
+    {
+        struct OamData *oamBuffer = gMain.oamBuffer;
+        oamBuffer[i] = *(struct OamData *)&gDummyOamData;
+    }
+}
+
+void LoadOam(void)
+{
+    if (!gMain.oamLoadDisabled)
+        CpuCopy32(gMain.oamBuffer, (void *)OAM, sizeof(gMain.oamBuffer));
+}
+
+static void ClearSpriteCopyRequests(void)
+{
+    u8 i;
+
+    gShouldProcessSpriteCopyRequests = FALSE;
+    gSpriteCopyRequestCount = 0;
+
+    for (i = 0; i < MAX_SPRITE_COPY_REQUESTS; i++)
+    {
+        gSpriteCopyRequests[i].src = 0;
+        gSpriteCopyRequests[i].dest = 0;
+        gSpriteCopyRequests[i].size = 0;
+    }
+}
+
+static void ResetOamMatrices(void)
+{
+    u8 i;
+    for (i = 0; i < OAM_MATRIX_COUNT; i++)
+    {
+        // set to identity matrix
+        gOamMatrices[i].a = 0x0100;
+        gOamMatrices[i].b = 0x0000;
+        gOamMatrices[i].c = 0x0000;
+        gOamMatrices[i].d = 0x0100;
+    }
+}
+
+void SetOamMatrix(u8 matrixNum, u16 a, u16 b, u16 c, u16 d)
+{
+    gOamMatrices[matrixNum].a = a;
+    gOamMatrices[matrixNum].b = b;
+    gOamMatrices[matrixNum].c = c;
+    gOamMatrices[matrixNum].d = d;
+}
+
+static void ResetSprite(struct Sprite *sprite)
+{
+    *sprite = sDummySprite;
+}
+
+void CalcCenterToCornerVec(struct Sprite *sprite, u8 shape, u8 size, u8 affineMode)
+{
+    u8 x = sCenterToCornerVecTable[shape][size][0];
+    u8 y = sCenterToCornerVecTable[shape][size][1];
+
+    if (affineMode & ST_OAM_AFFINE_DOUBLE_MASK)
+    {
+        x *= 2;
+        y *= 2;
+    }
+
+    sprite->centerToCornerVecX = x;
+    sprite->centerToCornerVecY = y;
+}
+
+static s16 AllocSpriteTiles(u16 tileCount)
+{
+    u16 i;
+    s16 start;
+    u16 numTilesFound;
+
+    if (tileCount == 0)
+    {
+        // Free all unreserved tiles if the tile count is 0.
+        for (i = gReservedSpriteTileCount; i < TOTAL_OBJ_TILE_COUNT; i++)
+            FREE_SPRITE_TILE(i);
+
+        return 0;
+    }
+
+    i = gReservedSpriteTileCount;
+
+    for (;;)
+    {
+        while (SPRITE_TILE_IS_ALLOCATED(i))
+        {
+            i++;
+
+            if (i == TOTAL_OBJ_TILE_COUNT)
+                return -1;
+        }
+
+        start = i;
+        numTilesFound = 1;
+
+        while (numTilesFound != tileCount)
+        {
+            i++;
+
+            if (i == TOTAL_OBJ_TILE_COUNT)
+                return -1;
+
+            if (!SPRITE_TILE_IS_ALLOCATED(i))
+                numTilesFound++;
+            else
+                break;
+        }
+
+        if (numTilesFound == tileCount)
+            break;
+    }
+
+    for (i = start; i < tileCount + start; i++)
+        ALLOC_SPRITE_TILE(i);
+
+    return start;
+}
+
+u8 SpriteTileAllocBitmapOp(u16 bit, u8 op)
+{
+    u8 index = bit / 8;
+    u8 shift = bit % 8;
+    u8 val = bit % 8;
+    u8 retVal = 0;
+
+    if (op == 0)
+    {
+        val = ~(1 << val);
+        gSpriteTileAllocBitmap[index] &= val;
+    }
+    else if (op == 1)
+    {
+        val = (1 << val);
+        gSpriteTileAllocBitmap[index] |= val;
+    }
+    else
+    {
+        retVal = 1 << shift;
+        retVal &= gSpriteTileAllocBitmap[index];
+    }
+
+    return retVal;
+}
+
+void SpriteCallbackDummy(struct Sprite *sprite)
+{
+}
+
+void ProcessSpriteCopyRequests(void)
+{
+    if (gShouldProcessSpriteCopyRequests)
+    {
+        u8 i = 0;
+
+        while (gSpriteCopyRequestCount > 0)
+        {
+            CpuCopy16(gSpriteCopyRequests[i].src, gSpriteCopyRequests[i].dest, gSpriteCopyRequests[i].size);
+            gSpriteCopyRequestCount--;
+            i++;
+        }
+
+        gShouldProcessSpriteCopyRequests = FALSE;
+    }
+}
+
+static void RequestSpriteFrameImageCopy(u16 index, u16 tileNum, const struct SpriteFrameImage *images)
+{
+    if (gSpriteCopyRequestCount < MAX_SPRITE_COPY_REQUESTS)
+    {
+        gSpriteCopyRequests[gSpriteCopyRequestCount].src = images[index].data;
+        gSpriteCopyRequests[gSpriteCopyRequestCount].dest = OBJ_VRAM0 + TILE_SIZE_4BPP * tileNum;
+        gSpriteCopyRequests[gSpriteCopyRequestCount].size = images[index].size;
+        gSpriteCopyRequestCount++;
+    }
+#if DEBUG
+    else
+    {
+        Crash(sDmaOverErrorMsg);
+    }
+#endif
+}
+
+void RequestSpriteCopy(const void *src, u8 *dest, u16 size)
+{
+    if (gSpriteCopyRequestCount < MAX_SPRITE_COPY_REQUESTS)
+    {
+        gSpriteCopyRequests[gSpriteCopyRequestCount].src = src;
+        gSpriteCopyRequests[gSpriteCopyRequestCount].dest = dest;
+        gSpriteCopyRequests[gSpriteCopyRequestCount].size = size;
+        gSpriteCopyRequestCount++;
+    }
+#if DEBUG
+    else
+    {
+        Crash(sDmaOverErrorMsg);
+    }
+#endif
+}
+
+// these two functions are unused.
+void CopyFromSprites(u8 *dest)
+{
+    u32 i;
+    u8 *src = (u8 *)gSprites;
+    for (i = 0; i < sizeof(struct Sprite) * MAX_SPRITES; i++)
+    {
+        *dest = *src;
+        dest++;
+        src++;
+    }
+}
+
+void CopyToSprites(u8 *src)
+{
+    u32 i;
+    u8 *dest = (u8 *)gSprites;
+    for (i = 0; i < sizeof(struct Sprite) * MAX_SPRITES; i++)
+    {
+        *dest = *src;
+        src++;
+        dest++;
+    }
+}
+
+static void ResetAllSprites(void)
+{
+    u8 i;
+
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        ResetSprite(&gSprites[i]);
+        gSpriteOrder[i] = i;
+    }
+
+    ResetSprite(&gSprites[i]);
+    sub_814A590();
+}
+
+void FreeSpriteTiles(struct Sprite *sprite)
+{
+    if (sprite->template->tileTag != 0xFFFF)
+        FreeSpriteTilesByTag(sprite->template->tileTag);
+}
+
+void FreeSpritePalette(struct Sprite *sprite)
+{
+    FreeSpritePaletteByTag(sprite->template->paletteTag);
+}
+
+void FreeSpriteOamMatrix(struct Sprite *sprite)
+{
+    if (sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK)
+    {
+        FreeOamMatrix(sprite->oam.matrixNum);
+        sprite->oam.affineMode = ST_OAM_AFFINE_OFF;
+    }
+}
+
+void DestroySpriteAndFreeResources(struct Sprite *sprite)
+{
+    FreeSpriteTiles(sprite);
+    FreeSpritePalette(sprite);
+    FreeSpriteOamMatrix(sprite);
+    DestroySprite(sprite);
+}
+
+// Loads the mon name, level, and hp sprites into OAM.
+void DrawPartyMenuMonText(u32 a1, u32 a2, const u16 *a3, u16 a4, u32 baseTileNumber)
+{
+    const u16 *d = a3;
+    struct OamData *oam = &gMain.oamBuffer[gMain.objCount];
+    while (!(gMain.objCount & 0x80) && (s16)(d[0] + 1) != 0)
+    {
+        u16 *x = (u16 *)oam;
+        x[0] = (d[0] & sOamBitmasks[0]) | ((d[0] + a2) & sOamBitmasks[1]) | ((a4 & sOamBitmasks[2]) << 8);
+        x[1] = (d[1] & sOamBitmasks[3]) | ((d[1] + a1) & sOamBitmasks[4]) | ((a4 & sOamBitmasks[5]) << 4);
+        x[2] = (d[2] & sOamBitmasks[6]) | ((d[2] + baseTileNumber) & sOamBitmasks[7]) | (a4 & sOamBitmasks[8]);
+        oam++;
+        gMain.objCount++;
+        d += 3;
+    }
+}
+
+void AnimateSprite(struct Sprite *sprite)
+{
+    sAnimFuncs[sprite->animBeginning](sprite);
+
+    if (!gAffineAnimsDisabled)
+        sAffineAnimFuncs[sprite->affineAnimBeginning](sprite);
+}
+
+static void BeginAnim(struct Sprite *sprite)
+{
+    s16 imageValue;
+    u8 duration;
+    u8 hFlip;
+    u8 vFlip;
+
+    sprite->animCmdIndex = 0;
+    sprite->animEnded = FALSE;
+    sprite->animLoopCounter = 0;
+    imageValue = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.imageValue;
+
+    if (imageValue != -1)
+    {
+        sprite->animBeginning = FALSE;
+        duration = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.duration;
+        hFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.hFlip;
+        vFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.vFlip;
+
+        if (duration)
+            duration--;
+
+        sprite->animDelayCounter = duration;
+
+        if (!(sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK))
+            SetSpriteOamFlipBits(sprite, hFlip, vFlip);
+
+        if (sprite->usingSheet)
+            sprite->oam.tileNum = sprite->sheetTileStart + imageValue;
+        else
+            RequestSpriteFrameImageCopy(imageValue, sprite->oam.tileNum, sprite->images);
+    }
+}
+
+static void ContinueAnim(struct Sprite *sprite)
+{
+    if (sprite->animDelayCounter)
+    {
+        u8 hFlip;
+        u8 vFlip;
+        DecrementAnimDelayCounter(sprite);
+        hFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.hFlip;
+        vFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.vFlip;
+        if (!(sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK))
+            SetSpriteOamFlipBits(sprite, hFlip, vFlip);
+    }
+    else if (!sprite->animPaused)
+    {
+        s16 type;
+        s16 funcIndex;
+        sprite->animCmdIndex++;
+        type = sprite->anims[sprite->animNum][sprite->animCmdIndex].type;
+        funcIndex = 3;
+        if (type < 0)
+            funcIndex = type + 3;
+        sAnimCmdFuncs[funcIndex](sprite);
+    }
+}
+
+static void AnimCmd_frame(struct Sprite *sprite)
+{
+    s16 imageValue;
+    u8 duration;
+    u8 hFlip;
+    u8 vFlip;
+
+    imageValue = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.imageValue;
+    duration = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.duration;
+    hFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.hFlip;
+    vFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.vFlip;
+
+    if (duration)
+        duration--;
+
+    sprite->animDelayCounter = duration;
+
+    if (!(sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK))
+        SetSpriteOamFlipBits(sprite, hFlip, vFlip);
+
+    if (sprite->usingSheet)
+        sprite->oam.tileNum = sprite->sheetTileStart + imageValue;
+    else
+        RequestSpriteFrameImageCopy(imageValue, sprite->oam.tileNum, sprite->images);
+}
+
+static void AnimCmd_end(struct Sprite *sprite)
+{
+    sprite->animCmdIndex--;
+    sprite->animEnded = TRUE;
+}
+
+static void AnimCmd_jump(struct Sprite *sprite)
+{
+    s16 imageValue;
+    u8 duration;
+    u8 hFlip;
+    u8 vFlip;
+
+    sprite->animCmdIndex = sprite->anims[sprite->animNum][sprite->animCmdIndex].jump.target;
+
+    imageValue = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.imageValue;
+    duration = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.duration;
+    hFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.hFlip;
+    vFlip = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.vFlip;
+
+    if (duration)
+        duration--;
+
+    sprite->animDelayCounter = duration;
+
+    if (!(sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK))
+        SetSpriteOamFlipBits(sprite, hFlip, vFlip);
+
+    if (sprite->usingSheet)
+        sprite->oam.tileNum = sprite->sheetTileStart + imageValue;
+    else
+        RequestSpriteFrameImageCopy(imageValue, sprite->oam.tileNum, sprite->images);
+}
+
+static void AnimCmd_loop(struct Sprite *sprite)
+{
+    if (sprite->animLoopCounter)
+        ContinueAnimLoop(sprite);
+    else
+        BeginAnimLoop(sprite);
+}
+
+static void BeginAnimLoop(struct Sprite *sprite)
+{
+    sprite->animLoopCounter = sprite->anims[sprite->animNum][sprite->animCmdIndex].loop.count;
+    JumpToTopOfAnimLoop(sprite);
+    ContinueAnim(sprite);
+}
+
+static void ContinueAnimLoop(struct Sprite *sprite)
+{
+    sprite->animLoopCounter--;
+    JumpToTopOfAnimLoop(sprite);
+    ContinueAnim(sprite);
+}
+
+static void JumpToTopOfAnimLoop(struct Sprite *sprite)
+{
+    if (sprite->animLoopCounter)
+    {
+        sprite->animCmdIndex--;
+
+        while (sprite->anims[sprite->animNum][sprite->animCmdIndex - 1].type != -3)
+        {
+            if (sprite->animCmdIndex == 0)
+                break;
+            sprite->animCmdIndex--;
+        }
+
+        sprite->animCmdIndex--;
+    }
+}
+
+static void BeginAffineAnim(struct Sprite *sprite)
+{
+    if ((sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK) && sprite->affineAnims[0][0].type != 32767)
+    {
+        struct AffineAnimFrameCmd frameCmd;
+        u8 matrixNum = GetSpriteMatrixNum(sprite);
+        AffineAnimStateRestartAnim(matrixNum);
+        GetAffineAnimFrame(matrixNum, sprite, &frameCmd);
+        sprite->affineAnimBeginning = FALSE;
+        sprite->affineAnimEnded = FALSE;
+        ApplyAffineAnimFrame(matrixNum, &frameCmd);
+        sAffineAnimStates[matrixNum].delayCounter = frameCmd.duration;
+    }
+}
+
+static void ContinueAffineAnim(struct Sprite *sprite)
+{
+    if (sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK)
+    {
+        u8 matrixNum = GetSpriteMatrixNum(sprite);
+
+        if (sAffineAnimStates[matrixNum].delayCounter)
+        {
+            AffineAnimDelay(matrixNum, sprite);
+        }
+        else if (!sprite->affineAnimPaused)
+        {
+            s16 type;
+            s16 funcIndex;
+            sAffineAnimStates[matrixNum].animCmdIndex++;
+            type = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].type;
+            funcIndex = 3;
+            if (type >= 32765)
+                funcIndex = type - 32765;
+            sAffineAnimCmdFuncs[funcIndex](matrixNum, sprite);
+        }
+    }
+}
+
+static void AffineAnimDelay(u8 matrixNum, struct Sprite *sprite)
+{
+    if (!DecrementAffineAnimDelayCounter(sprite, matrixNum))
+    {
+        struct AffineAnimFrameCmd frameCmd;
+        GetAffineAnimFrame(matrixNum, sprite, &frameCmd);
+        ApplyAffineAnimFrameRelativeAndUpdateMatrix(matrixNum, &frameCmd);
+    }
+}
+
+static void AffineAnimCmd_loop(u8 matrixNum, struct Sprite *sprite)
+{
+    if (sAffineAnimStates[matrixNum].loopCounter)
+        ContinueAffineAnimLoop(matrixNum, sprite);
+    else
+        BeginAffineAnimLoop(matrixNum, sprite);
+}
+
+static void BeginAffineAnimLoop(u8 matrixNum, struct Sprite *sprite)
+{
+    sAffineAnimStates[matrixNum].loopCounter = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].loop.count;
+    JumpToTopOfAffineAnimLoop(matrixNum, sprite);
+    ContinueAffineAnim(sprite);
+}
+
+static void ContinueAffineAnimLoop(u8 matrixNum, struct Sprite *sprite)
+{
+    sAffineAnimStates[matrixNum].loopCounter--;
+    JumpToTopOfAffineAnimLoop(matrixNum, sprite);
+    ContinueAffineAnim(sprite);
+}
+
+static void JumpToTopOfAffineAnimLoop(u8 matrixNum, struct Sprite *sprite)
+{
+    if (sAffineAnimStates[matrixNum].loopCounter)
+    {
+        sAffineAnimStates[matrixNum].animCmdIndex--;
+
+        while (sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex - 1].type != 32765)
+        {
+            if (sAffineAnimStates[matrixNum].animCmdIndex == 0)
+                break;
+            sAffineAnimStates[matrixNum].animCmdIndex--;
+        }
+
+        sAffineAnimStates[matrixNum].animCmdIndex--;
+    }
+}
+
+static void AffineAnimCmd_jump(u8 matrixNum, struct Sprite *sprite)
+{
+    struct AffineAnimFrameCmd frameCmd;
+    sAffineAnimStates[matrixNum].animCmdIndex = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].jump.target;
+    GetAffineAnimFrame(matrixNum, sprite, &frameCmd);
+    ApplyAffineAnimFrame(matrixNum, &frameCmd);
+    sAffineAnimStates[matrixNum].delayCounter = frameCmd.duration;
+}
+
+static void AffineAnimCmd_end(u8 matrixNum, struct Sprite *sprite)
+{
+    struct AffineAnimFrameCmd dummyFrameCmd = {0};
+    sprite->affineAnimEnded = TRUE;
+    sAffineAnimStates[matrixNum].animCmdIndex--;
+    ApplyAffineAnimFrameRelativeAndUpdateMatrix(matrixNum, &dummyFrameCmd);
+}
+
+static void AffineAnimCmd_frame(u8 matrixNum, struct Sprite *sprite)
+{
+    struct AffineAnimFrameCmd frameCmd;
+    GetAffineAnimFrame(matrixNum, sprite, &frameCmd);
+    ApplyAffineAnimFrame(matrixNum, &frameCmd);
+    sAffineAnimStates[matrixNum].delayCounter = frameCmd.duration;
+}
+
+static void CopyOamMatrix(u8 destMatrixIndex, struct OamMatrix *srcMatrix)
+{
+    gOamMatrices[destMatrixIndex].a = srcMatrix->a;
+    gOamMatrices[destMatrixIndex].b = srcMatrix->b;
+    gOamMatrices[destMatrixIndex].c = srcMatrix->c;
+    gOamMatrices[destMatrixIndex].d = srcMatrix->d;
+}
+
+static u8 GetSpriteMatrixNum(struct Sprite *sprite)
+{
+    u8 matrixNum = 0;
+    if (sprite->oam.affineMode & ST_OAM_AFFINE_ON_MASK)
+        matrixNum = sprite->oam.matrixNum;
+    return matrixNum;
+}
+
+static void SetSpriteOamFlipBits(struct Sprite *sprite, u8 hFlip, u8 vFlip)
+{
+    sprite->oam.matrixNum &= 0x7;
+    sprite->oam.matrixNum |= (((hFlip ^ sprite->hFlip) & 1) << 3);
+    sprite->oam.matrixNum |= (((vFlip ^ sprite->vFlip) & 1) << 4);
+}
+
+static void AffineAnimStateRestartAnim(u8 matrixNum)
+{
+    sAffineAnimStates[matrixNum].animCmdIndex = 0;
+    sAffineAnimStates[matrixNum].delayCounter = 0;
+    sAffineAnimStates[matrixNum].loopCounter = 0;
+}
+
+static void AffineAnimStateStartAnim(u8 matrixNum, u8 animNum)
+{
+    sAffineAnimStates[matrixNum].animNum = animNum;
+    sAffineAnimStates[matrixNum].animCmdIndex = 0;
+    sAffineAnimStates[matrixNum].delayCounter = 0;
+    sAffineAnimStates[matrixNum].loopCounter = 0;
+    sAffineAnimStates[matrixNum].xScale = 0x0100;
+    sAffineAnimStates[matrixNum].yScale = 0x0100;
+    sAffineAnimStates[matrixNum].rotation = 0;
+}
+
+static void AffineAnimStateReset(u8 matrixNum)
+{
+    sAffineAnimStates[matrixNum].animNum = 0;
+    sAffineAnimStates[matrixNum].animCmdIndex = 0;
+    sAffineAnimStates[matrixNum].delayCounter = 0;
+    sAffineAnimStates[matrixNum].loopCounter = 0;
+    sAffineAnimStates[matrixNum].xScale = 0x0100;
+    sAffineAnimStates[matrixNum].yScale = 0x0100;
+    sAffineAnimStates[matrixNum].rotation = 0;
+}
+
+static void ApplyAffineAnimFrameAbsolute(u8 matrixNum, struct AffineAnimFrameCmd *frameCmd)
+{
+    sAffineAnimStates[matrixNum].xScale = frameCmd->xScale;
+    sAffineAnimStates[matrixNum].yScale = frameCmd->yScale;
+    sAffineAnimStates[matrixNum].rotation = frameCmd->rotation << 8;
+}
+
+static void DecrementAnimDelayCounter(struct Sprite *sprite)
+{
+    if (!sprite->animPaused)
+        sprite->animDelayCounter--;
+}
+
+static bool8 DecrementAffineAnimDelayCounter(struct Sprite *sprite, u8 matrixNum)
+{
+    if (!sprite->affineAnimPaused)
+        --sAffineAnimStates[matrixNum].delayCounter;
+    return sprite->affineAnimPaused;
+}
+
+static void ApplyAffineAnimFrameRelativeAndUpdateMatrix(u8 matrixNum, struct AffineAnimFrameCmd *frameCmd)
+{
+    struct ObjAffineSrcData srcData;
+    struct OamMatrix matrix;
+    sAffineAnimStates[matrixNum].xScale += frameCmd->xScale;
+    sAffineAnimStates[matrixNum].yScale += frameCmd->yScale;
+    sAffineAnimStates[matrixNum].rotation = (sAffineAnimStates[matrixNum].rotation + (frameCmd->rotation << 8)) & ~0xFF;
+    srcData.xScale = ConvertScaleParam(sAffineAnimStates[matrixNum].xScale);
+    srcData.yScale = ConvertScaleParam(sAffineAnimStates[matrixNum].yScale);
+    srcData.rotation = sAffineAnimStates[matrixNum].rotation;
+    ObjAffineSet(&srcData, &matrix, 1, 2);
+    CopyOamMatrix(matrixNum, &matrix);
+}
+
+static s16 ConvertScaleParam(s16 scale)
+{
+    s32 val = 0x10000;
+    return val / scale;
+}
+
+static void GetAffineAnimFrame(u8 matrixNum, struct Sprite *sprite, struct AffineAnimFrameCmd *frameCmd)
+{
+    frameCmd->xScale = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].frame.xScale;
+    frameCmd->yScale = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].frame.yScale;
+    frameCmd->rotation = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].frame.rotation;
+    frameCmd->duration = sprite->affineAnims[sAffineAnimStates[matrixNum].animNum][sAffineAnimStates[matrixNum].animCmdIndex].frame.duration;
+}
+
+static void ApplyAffineAnimFrame(u8 matrixNum, struct AffineAnimFrameCmd *frameCmd)
+{
+    struct AffineAnimFrameCmd dummyFrameCmd = {0};
+
+    if (frameCmd->duration)
+    {
+        frameCmd->duration--;
+        ApplyAffineAnimFrameRelativeAndUpdateMatrix(matrixNum, frameCmd);
+    }
+    else
+    {
+        ApplyAffineAnimFrameAbsolute(matrixNum, frameCmd);
+        ApplyAffineAnimFrameRelativeAndUpdateMatrix(matrixNum, &dummyFrameCmd);
+    }
+}
+
+void StartSpriteAnim(struct Sprite *sprite, u8 animNum)
+{
+    sprite->animNum = animNum;
+    sprite->animBeginning = TRUE;
+    sprite->animEnded = FALSE;
+}
+
+void StartSpriteAnimIfDifferent(struct Sprite *sprite, u8 animNum)
+{
+    if (sprite->animNum != animNum)
+        StartSpriteAnim(sprite, animNum);
+}
+
+void SeekSpriteAnim(struct Sprite *sprite, u8 animCmdIndex)
+{
+    u8 temp = sprite->animPaused;
+    sprite->animCmdIndex = animCmdIndex - 1;
+    sprite->animDelayCounter = 0;
+    sprite->animBeginning = FALSE;
+    sprite->animEnded = FALSE;
+    sprite->animPaused = FALSE;
+    ContinueAnim(sprite);
+    if (sprite->animDelayCounter)
+        sprite->animDelayCounter++;
+    sprite->animPaused = temp;
+}
+
+void StartSpriteAffineAnim(struct Sprite *sprite, u8 animNum)
+{
+    u8 matrixNum = GetSpriteMatrixNum(sprite);
+    AffineAnimStateStartAnim(matrixNum, animNum);
+    sprite->affineAnimBeginning = TRUE;
+    sprite->affineAnimEnded = FALSE;
+}
+
+void StartSpriteAffineAnimIfDifferent(struct Sprite *sprite, u8 animNum)
+{
+    u8 matrixNum = GetSpriteMatrixNum(sprite);
+    if (sAffineAnimStates[matrixNum].animNum != animNum)
+        StartSpriteAffineAnim(sprite, animNum);
+}
+
+void ChangeSpriteAffineAnim(struct Sprite *sprite, u8 animNum)
+{
+    u8 matrixNum = GetSpriteMatrixNum(sprite);
+    sAffineAnimStates[matrixNum].animNum = animNum;
+    sprite->affineAnimBeginning = TRUE;
+    sprite->affineAnimEnded = FALSE;
+}
+
+void ChangeSpriteAffineAnimIfDifferent(struct Sprite *sprite, u8 animNum)
+{
+    u8 matrixNum = GetSpriteMatrixNum(sprite);
+    if (sAffineAnimStates[matrixNum].animNum != animNum)
+        ChangeSpriteAffineAnim(sprite, animNum);
+}
+
+void SetSpriteSheetFrameTileNum(struct Sprite *sprite)
+{
+    if (sprite->usingSheet)
+    {
+        s16 tileOffset = sprite->anims[sprite->animNum][sprite->animCmdIndex].frame.imageValue;
+        if (tileOffset < 0)
+            tileOffset = 0;
+        sprite->oam.tileNum = sprite->sheetTileStart + tileOffset;
+    }
+}
+
+static void ResetAffineAnimData(void)
+{
+    u8 i;
+
+    gAffineAnimsDisabled = 0;
+    gOamMatrixAllocBitmap = 0;
+
+    ResetOamMatrices();
+
+    for (i = 0; i < OAM_MATRIX_COUNT; i++)
+        AffineAnimStateReset(i);
+}
+
+u8 AllocOamMatrix(void)
+{
+    u8 i = 0;
+    u32 bit = 1;
+    u32 bitmap = gOamMatrixAllocBitmap;
+
+    while (i < OAM_MATRIX_COUNT)
+    {
+        if (!(bitmap & bit))
+        {
+            gOamMatrixAllocBitmap |= bit;
+            return i;
+        }
+
+        i++;
+        bit <<= 1;
+    }
+
+    return 0xFF;
+}
+
+void FreeOamMatrix(u8 matrixNum)
+{
+    u8 i = 0;
+    u32 bit = 1;
+
+    while (i < matrixNum)
+    {
+        i++;
+        bit <<= 1;
+    }
+
+    gOamMatrixAllocBitmap &= ~bit;
+    SetOamMatrix(matrixNum, 0x100, 0, 0, 0x100);
+}
+
+void InitSpriteAffineAnim(struct Sprite *sprite)
+{
+    u8 matrixNum = AllocOamMatrix();
+    if (matrixNum != 0xFF)
+    {
+        CalcCenterToCornerVec(sprite, sprite->oam.shape, sprite->oam.size, sprite->oam.affineMode);
+        sprite->oam.matrixNum = matrixNum;
+        sprite->affineAnimBeginning = TRUE;
+        AffineAnimStateReset(matrixNum);
+    }
+}
+
+void SetOamMatrixRotationScaling(u8 matrixNum, s16 xScale, s16 yScale, u16 rotation)
+{
+    struct ObjAffineSrcData srcData;
+    struct OamMatrix matrix;
+    srcData.xScale = ConvertScaleParam(xScale);
+    srcData.yScale = ConvertScaleParam(yScale);
+    srcData.rotation = rotation;
+    ObjAffineSet(&srcData, &matrix, 1, 2);
+    CopyOamMatrix(matrixNum, &matrix);
+}
+
+u16 LoadSpriteSheet(const struct SpriteSheet *sheet)
+{
+    s16 tileStart = AllocSpriteTiles(sheet->size / TILE_SIZE_4BPP);
+
+    if (tileStart < 0)
+    {
+        return 0;
+    }
+    else
+    {
+        AllocSpriteTileRange(sheet->tag, (u16)tileStart, sheet->size / TILE_SIZE_4BPP);
+        CpuCopy16(sheet->data, OBJ_VRAM0 + TILE_SIZE_4BPP * tileStart, sheet->size);
+        return (u16)tileStart;
+    }
+}
+
+void LoadSpriteSheets(const struct SpriteSheet *sheets)
+{
+    u8 i;
+    for (i = 0; sheets[i].data != NULL; i++)
+        LoadSpriteSheet(&sheets[i]);
+}
+
+u16 AllocTilesForSpriteSheet(struct SpriteSheet *sheet)
+{
+    s16 tileStart = AllocSpriteTiles(sheet->size / TILE_SIZE_4BPP);
+
+    if (tileStart < 0)
+    {
+        return 0;
+    }
+    else
+    {
+        AllocSpriteTileRange(sheet->tag, (u16)tileStart, sheet->size / TILE_SIZE_4BPP);
+        return (u16)tileStart;
+    }
+}
+
+void AllocTilesForSpriteSheets(struct SpriteSheet *sheets)
+{
+    u8 i;
+    for (i = 0; sheets[i].data != NULL; i++)
+        AllocTilesForSpriteSheet(&sheets[i]);
+}
+
+void LoadTilesForSpriteSheet(const struct SpriteSheet *sheet)
+{
+    const u8 *data = sheet->data;
+    u16 tileStart = GetSpriteTileStartByTag(sheet->tag);
+    CpuCopy16(data, OBJ_VRAM0 + TILE_SIZE_4BPP * tileStart, sheet->size);
+}
+
+void LoadTilesForSpriteSheets(struct SpriteSheet *sheets)
+{
+    u8 i;
+    for (i = 0; sheets[i].data != NULL; i++)
+        LoadTilesForSpriteSheet(&sheets[i]);
+}
+
+void FreeSpriteTilesByTag(u16 tag)
+{
+    u8 index = IndexOfSpriteTileTag(tag);
+    if (index != 0xFF)
+    {
+        u16 i;
+        u16 *rangeStarts;
+        u16 *rangeCounts;
+        u16 start;
+        u16 count;
+        rangeStarts = sSpriteTileRanges;
+        start = rangeStarts[index * 2];
+        rangeCounts = sSpriteTileRanges + 1;
+        count = rangeCounts[index * 2];
+
+        for (i = start; i < start + count; i++)
+            FREE_SPRITE_TILE(i);
+
+        sSpriteTileRangeTags[index] = 0xFFFF;
+    }
+}
+
+void FreeSpriteTileRanges(void)
+{
+    u8 i;
+
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        sSpriteTileRangeTags[i] = 0xFFFF;
+        SET_SPRITE_TILE_RANGE(i, 0, 0);
+    }
+}
+
+u16 GetSpriteTileStartByTag(u16 tag)
+{
+    u8 index = IndexOfSpriteTileTag(tag);
+    if (index == 0xFF)
+        return 0xFFFF;
+    return sSpriteTileRanges[index * 2];
+}
+
+static u8 IndexOfSpriteTileTag(u16 tag)
+{
+    u8 i;
+
+    for (i = 0; i < MAX_SPRITES; i++)
+        if (sSpriteTileRangeTags[i] == tag)
+            return i;
+
+    return 0xFF;
+}
+
+u16 GetSpriteTileTagByTileStart(u16 start)
+{
+    u8 i;
+
+    for (i = 0; i < MAX_SPRITES; i++)
+    {
+        if (sSpriteTileRangeTags[i] != 0xFFFF && sSpriteTileRanges[i * 2] == start)
+            return sSpriteTileRangeTags[i];
+    }
+
+    return 0xFFFF;
+}
+
+static void AllocSpriteTileRange(u16 tag, u16 start, u16 count)
+{
+    u8 freeIndex = IndexOfSpriteTileTag(0xFFFF);
+    sSpriteTileRangeTags[freeIndex] = tag;
+    SET_SPRITE_TILE_RANGE(freeIndex, start, count);
+}
+
+void RequestSpriteSheetCopy(const struct SpriteSheet *sheet)
+{
+    const u8 *data = sheet->data;
+    u16 tileStart = GetSpriteTileStartByTag(sheet->tag);
+    RequestSpriteCopy(data, OBJ_VRAM0 + tileStart * TILE_SIZE_4BPP, sheet->size);
+}
+
+u16 LoadSpriteSheetDeferred(const struct SpriteSheet *sheet)
+{
+    s16 tileStart = AllocSpriteTiles(sheet->size / TILE_SIZE_4BPP);
+
+    if (tileStart < 0)
+    {
+        return 0;
+    }
+    else
+    {
+        AllocSpriteTileRange(sheet->tag, (u16)tileStart, sheet->size / TILE_SIZE_4BPP);
+        RequestSpriteSheetCopy(sheet);
+        return (u16)tileStart;
+    }
+}
+
+void FreeAllSpritePalettes(void)
+{
+    u8 i;
+    gReservedSpritePaletteCount = 0;
+    for (i = 0; i < 16; i++)
+        sSpritePaletteTags[i] = 0xFFFF;
+}
+
+u8 LoadSpritePalette(const struct SpritePalette *palette)
+{
+    u8 index = IndexOfSpritePaletteTag(palette->tag);
+
+    if (index != 0xFF)
+        return index;
+
+    index = IndexOfSpritePaletteTag(0xFFFF);
+
+    if (index == 0xFF)
+    {
+        return 0xFF;
+    }
+    else
+    {
+        sSpritePaletteTags[index] = palette->tag;
+        DoLoadSpritePalette(palette->data, index * 16);
+        return index;
+    }
+}
+
+void LoadSpritePalettes(const struct SpritePalette *palettes)
+{
+    u8 i;
+    for (i = 0; palettes[i].data != NULL; i++)
+        if (LoadSpritePalette(&palettes[i]) == 0xFF)
+            break;
+}
+
+static void DoLoadSpritePalette(const u16 *src, u16 paletteOffset)
+{
+    LoadPalette(src, paletteOffset + 0x100, 32);
+}
+
+u8 AllocSpritePalette(u16 tag)
+{
+    u8 index = IndexOfSpritePaletteTag(0xFFFF);
+    if (index == 0xFF)
+    {
+        return 0xFF;
+    }
+    else
+    {
+        sSpritePaletteTags[index] = tag;
+        return index;
+    }
+}
+
+u8 IndexOfSpritePaletteTag(u16 tag)
+{
+    u8 i;
+    for (i = gReservedSpritePaletteCount; i < 16; i++)
+        if (sSpritePaletteTags[i] == tag)
+            return i;
+
+    return 0xFF;
+}
+
+u16 GetSpritePaletteTagByPaletteNum(u8 paletteNum)
+{
+    return sSpritePaletteTags[paletteNum];
+}
+
+void FreeSpritePaletteByTag(u16 tag)
+{
+    u8 index = IndexOfSpritePaletteTag(tag);
+    if (index != 0xFF)
+        sSpritePaletteTags[index] = 0xFFFF;
+}
+
+void SetSubspriteTables(struct Sprite *sprite, const struct SubspriteTable *subspriteTables)
+{
+    sprite->subspriteTables = subspriteTables;
+    sprite->subspriteTableNum = 0;
+    sprite->subspriteMode = SUBSPRITES_ON;
+}
+
+bool8 AddSpriteToOamBuffer(struct Sprite *sprite, u8 *oamIndex)
+{
+    if (*oamIndex >= gOamLimit)
+        return 1;
+
+    if (!sprite->subspriteTables || sprite->subspriteMode == SUBSPRITES_OFF)
+    {
+        gMain.oamBuffer[*oamIndex] = sprite->oam;
+        (*oamIndex)++;
+        return 0;
+    }
+    else
+    {
+        return AddSubspritesToOamBuffer(sprite, &gMain.oamBuffer[*oamIndex], oamIndex);
+    }
+}
+
+bool8 AddSubspritesToOamBuffer(struct Sprite *sprite, struct OamData *destOam, u8 *oamIndex)
+{
+    const struct SubspriteTable *subspriteTable;
+    struct OamData *oam;
+
+    if (*oamIndex >= gOamLimit)
+        return 1;
+
+    subspriteTable = &sprite->subspriteTables[sprite->subspriteTableNum];
+    oam = &sprite->oam;
+
+    if (!subspriteTable || !subspriteTable->subsprites)
+    {
+        *destOam = *oam;
+        (*oamIndex)++;
+        return 0;
+    }
+    else
+    {
+        u16 tileNum;
+        u16 baseX;
+        u16 baseY;
+        u8 subspriteCount;
+        u8 hFlip;
+        u8 vFlip;
+        u8 i;
+
+        tileNum = oam->tileNum;
+        subspriteCount = subspriteTable->subspriteCount;
+        hFlip = ((s32)oam->matrixNum >> 3) & 1;
+        vFlip = ((s32)oam->matrixNum >> 4) & 1;
+        baseX = oam->x - sprite->centerToCornerVecX;
+        baseY = oam->y - sprite->centerToCornerVecY;
+
+        for (i = 0; i < subspriteCount; i++, (*oamIndex)++)
+        {
+            u16 x;
+            u16 y;
+
+            if (*oamIndex >= gOamLimit)
+                return 1;
+
+            x = subspriteTable->subsprites[i].x;
+            y = subspriteTable->subsprites[i].y;
+
+            if (hFlip)
+            {
+                s8 width = sOamDimensions[subspriteTable->subsprites[i].shape][subspriteTable->subsprites[i].size].width;
+                s16 right = x;
+                right += width;
+                x = right;
+                x = ~x + 1;
+            }
+
+            if (vFlip)
+            {
+                s8 height = sOamDimensions[subspriteTable->subsprites[i].shape][subspriteTable->subsprites[i].size].height;
+                s16 bottom = y;
+                bottom += height;
+                y = bottom;
+                y = ~y + 1;
+            }
+
+            destOam[i] = *oam;
+            destOam[i].shape = subspriteTable->subsprites[i].shape;
+            destOam[i].size = subspriteTable->subsprites[i].size;
+            destOam[i].x = (s16)baseX + (s16)x;
+            destOam[i].y = baseY + y;
+            destOam[i].tileNum = tileNum + subspriteTable->subsprites[i].tileOffset;
+
+            if (sprite->subspriteMode != SUBSPRITES_IGNORE_PRIORITY)
+                destOam[i].priority = subspriteTable->subsprites[i].priority;
+        }
+    }
+
+    return 0;
+}