pokeemerald/src/battle_anim_ice.c

#include "global.h"
#include "battle_anim.h"
#include "bg.h"
#include "field_weather.h"
#include "gpu_regs.h"
#include "graphics.h"
#include "main.h"
#include "palette.h"
#include "random.h"
#include "sprite.h"
#include "task.h"
#include "trig.h"
#include "constants/battle_anim.h"
#include "constants/rgb.h"

// Ice-type (and related) move battle animations.

enum {
   HAILSTRUCTTYPE_NEGATIVE_POS_MOD = 0,
   HAILSTRUCTTYPE_POSITIVE_POS_MOD = 1,
   HAILSTRUCTTYPE_FIXED_POSITION   = 2,
};

// Hail: per-slot spawn rule. type + bPosition pick a battler or fixed screen coords;
// x, y are fallbacks when that battler has no visible sprite.
struct HailStruct {
    s32 x:10;
    s32 y:10;
    s32 bPosition:8;
    s32 type:4;
};

static void AnimUnusedIceCrystalThrow(struct Sprite *);
static void AnimUnusedIceCrystalThrow_Step(struct Sprite *);
static void AnimIcePunchSwirlingParticle(struct Sprite *);
static void AnimIceBeamParticle(struct Sprite *);
static void AnimIceEffectParticle(struct Sprite *);
static void AnimFlickerIceEffectParticle(struct Sprite *);
static void AnimSwirlingSnowball(struct Sprite *);
static void AnimSwirlingSnowball_Step1(struct Sprite *);
static void AnimSwirlingSnowball_Step2(struct Sprite *);
static void AnimSwirlingSnowball_End(struct Sprite *);
static void AnimMoveParticleBeyondTarget(struct Sprite *);
static void AnimWiggleParticleTowardsTarget(struct Sprite *);
static void AnimWaveFromCenterOfTarget(struct Sprite *);
static void InitSwirlingFogAnim(struct Sprite *);
static void AnimSwirlingFogAnim(struct Sprite *);
static void AnimThrowMistBall(struct Sprite *);
static void InitPoisonGasCloudAnim(struct Sprite *);
static void MovePoisonGasCloud(struct Sprite *);
static void AnimHailBegin(struct Sprite *);
static void AnimHailContinue(struct Sprite *);
static void InitIceBallAnim(struct Sprite *);
static void AnimThrowIceBall(struct Sprite *);
static void InitIceBallParticle(struct Sprite *);
static void AnimIceBallParticle(struct Sprite *);
static void AnimTask_HazeScrollingFog_Step(u8);
static void AnimTask_MistBallFog_Step(u8);
static void AnimTask_Hail2(u8);
static bool8 GenerateHailParticle(u8 hailStructId, u8 affineAnimNum, u8 taskId, u8 c);

static const union AnimCmd sAnim_Unused[] =
{
    ANIMCMD_FRAME(0, 5, .hFlip = TRUE),
    ANIMCMD_FRAME(1, 5, .hFlip = TRUE),
    ANIMCMD_JUMP(0),
};

static const union AnimCmd *const sAnims_Unused[] =
{
    sAnim_Unused,
};

// Unused
static const struct SpriteTemplate sUnusedIceCrystalThrowSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjNormal_8x8,
    .anims = gDummySpriteAnimTable,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimUnusedIceCrystalThrow,
};

static const union AnimCmd sAnim_IceCrystalLargeChunk[] =
{
    ANIMCMD_FRAME(0, 1),
    ANIMCMD_END,
};

static const union AnimCmd sAnim_IceCrystalLarge[] =
{
    ANIMCMD_FRAME(4, 1),
    ANIMCMD_END,
};

static const union AnimCmd sAnim_IceCrystalSmall[] =
{
    ANIMCMD_FRAME(6, 1),
    ANIMCMD_END,
};

static const union AnimCmd sAnim_Snowball[] =
{
    ANIMCMD_FRAME(7, 1),
    ANIMCMD_END,
};

static const union AnimCmd sAnim_BlizzardIceCrystal[] =
{
    ANIMCMD_FRAME(8, 1),
    ANIMCMD_END,
};

static const union AnimCmd sAnim_SmallBubblePair[] =
{
    ANIMCMD_FRAME(12, 6),
    ANIMCMD_FRAME(13, 6),
    ANIMCMD_JUMP(0),
};

// Unused, contains just the top left corner of the large ice crystal
static const union AnimCmd *const sAnims_IceCrystalLargeChunk[] =
{
    sAnim_IceCrystalLargeChunk,
};

static const union AnimCmd *const sAnims_IceCrystalLarge[] =
{
    sAnim_IceCrystalLarge,
};

static const union AnimCmd *const sAnims_IceCrystalSmall[] =
{
    sAnim_IceCrystalSmall,
};

static const union AnimCmd *const sAnims_Snowball[] =
{
    sAnim_Snowball,
};

static const union AnimCmd *const sAnims_BlizzardIceCrystal[] =
{
    sAnim_BlizzardIceCrystal,
};

const union AnimCmd *const gAnims_SmallBubblePair[] =
{
    sAnim_SmallBubblePair,
};

static const union AffineAnimCmd sAffineAnim_IceCrystalSpiralInwardLarge[] =
{
    AFFINEANIMCMD_FRAME(0x0, 0x0, 40, 1),
    AFFINEANIMCMD_JUMP(0),
};

static const union AffineAnimCmd *const sAffineAnims_IceCrystalSpiralInwardLarge[] =
{
    sAffineAnim_IceCrystalSpiralInwardLarge,
};

const struct SpriteTemplate gIceCrystalSpiralInwardLarge =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineDouble_ObjBlend_8x16,
    .anims = sAnims_IceCrystalLarge,
    .images = NULL,
    .affineAnims = sAffineAnims_IceCrystalSpiralInwardLarge,
    .callback = AnimIcePunchSwirlingParticle,
};

const struct SpriteTemplate gIceCrystalSpiralInwardSmall =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjBlend_8x8,
    .anims = sAnims_IceCrystalSmall,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimIcePunchSwirlingParticle,
};

static const union AffineAnimCmd sAffineAnim_IceBeamInnerCrystal[] =
{
    AFFINEANIMCMD_FRAME(0x0, 0x0, 10, 1),
    AFFINEANIMCMD_JUMP(0),
};

static const union AffineAnimCmd *const sAffineAnims_IceBeamInnerCrystal[] =
{
    sAffineAnim_IceBeamInnerCrystal,
};

const struct SpriteTemplate gIceBeamInnerCrystalSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineNormal_ObjBlend_8x16,
    .anims = sAnims_IceCrystalLarge,
    .images = NULL,
    .affineAnims = sAffineAnims_IceBeamInnerCrystal,
    .callback = AnimIceBeamParticle,
};

const struct SpriteTemplate gIceBeamOuterCrystalSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjBlend_8x8,
    .anims = sAnims_IceCrystalSmall,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimIceBeamParticle,
};

static const union AffineAnimCmd sAffineAnim_IceCrystalHit[] =
{
    AFFINEANIMCMD_FRAME(0xCE, 0xCE, 0, 0),
    AFFINEANIMCMD_FRAME(0x5, 0x5, 0, 10),
    AFFINEANIMCMD_FRAME(0x0, 0x0, 0, 6),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd *const sAffineAnims_IceCrystalHit[] =
{
    sAffineAnim_IceCrystalHit,
};

const struct SpriteTemplate gIceCrystalHitLargeSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineNormal_ObjBlend_8x16,
    .anims = sAnims_IceCrystalLarge,
    .images = NULL,
    .affineAnims = sAffineAnims_IceCrystalHit,
    .callback = AnimIceEffectParticle,
};

const struct SpriteTemplate gIceCrystalHitSmallSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineNormal_ObjBlend_8x8,
    .anims = sAnims_IceCrystalSmall,
    .images = NULL,
    .affineAnims = sAffineAnims_IceCrystalHit,
    .callback = AnimIceEffectParticle,
};

const struct SpriteTemplate gSwirlingSnowballSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjNormal_8x8,
    .anims = sAnims_Snowball,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimSwirlingSnowball,
};

const struct SpriteTemplate gBlizzardIceCrystalSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjNormal_16x16,
    .anims = sAnims_BlizzardIceCrystal,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimMoveParticleBeyondTarget,
};

const struct SpriteTemplate gPowderSnowSnowballSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjNormal_8x8,
    .anims = sAnims_Snowball,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimMoveParticleBeyondTarget,
};

static const union AnimCmd sAnim_IceGroundSpike[] =
{
    ANIMCMD_FRAME(0, 5),
    ANIMCMD_FRAME(2, 5),
    ANIMCMD_FRAME(4, 5),
    ANIMCMD_FRAME(6, 5),
    ANIMCMD_FRAME(4, 5),
    ANIMCMD_FRAME(2, 5),
    ANIMCMD_FRAME(0, 5),
    ANIMCMD_END,
};

static const union AnimCmd *const sAnims_IceGroundSpike[] =
{
    sAnim_IceGroundSpike,
};

const struct SpriteTemplate gIceGroundSpikeSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_SPIKES,
    .paletteTag = ANIM_TAG_ICE_SPIKES,
    .oam = &gOamData_AffineOff_ObjBlend_8x16,
    .anims = sAnims_IceGroundSpike,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimWaveFromCenterOfTarget,
};

static const union AnimCmd sAnim_Cloud[] =
{
    ANIMCMD_FRAME(0, 8),
    ANIMCMD_FRAME(8, 8),
    ANIMCMD_JUMP(0),
};

static const union AnimCmd *const sAnims_Cloud[] =
{
    sAnim_Cloud,
};

const struct SpriteTemplate gMistCloudSpriteTemplate =
{
    .tileTag = ANIM_TAG_MIST_CLOUD,
    .paletteTag = ANIM_TAG_MIST_CLOUD,
    .oam = &gOamData_AffineOff_ObjBlend_32x16,
    .anims = sAnims_Cloud,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = InitSwirlingFogAnim,
};

const struct SpriteTemplate gSmogCloudSpriteTemplate =
{
    .tileTag = ANIM_TAG_PURPLE_GAS_CLOUD,
    .paletteTag = ANIM_TAG_PURPLE_GAS_CLOUD,
    .oam = &gOamData_AffineOff_ObjBlend_32x16,
    .anims = sAnims_Cloud,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = InitSwirlingFogAnim,
};

static const u8 sHazeBlendAmounts[] =
{
    0, 1, 2, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 6, 6, 7, 8, 8, 8, 9,
};

const struct SpriteTemplate gMistBallSpriteTemplate =
{
    .tileTag = ANIM_TAG_SMALL_BUBBLES,
    .paletteTag = ANIM_TAG_SMALL_BUBBLES,
    .oam = &gOamData_AffineOff_ObjNormal_16x16,
    .anims = gDummySpriteAnimTable,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = AnimThrowMistBall,
};

static const u8 sMistBlendAmounts[] =
{
    0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5,
};

const struct SpriteTemplate gPoisonGasCloudSpriteTemplate =
{
    .tileTag = ANIM_TAG_PURPLE_GAS_CLOUD,
    .paletteTag = ANIM_TAG_PURPLE_GAS_CLOUD,
    .oam = &gOamData_AffineOff_ObjBlend_32x16,
    .anims = sAnims_Cloud,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = InitPoisonGasCloudAnim,
};

static const struct HailStruct sHailCoordData[] =
{
    {.x = 100, .y = 120, .bPosition = B_POSITION_PLAYER_LEFT,    .type = HAILSTRUCTTYPE_FIXED_POSITION},
    {.x = 85,  .y = 120, .bPosition = B_POSITION_PLAYER_LEFT,    .type = HAILSTRUCTTYPE_NEGATIVE_POS_MOD},
    {.x = 242, .y = 120, .bPosition = B_POSITION_OPPONENT_LEFT,  .type = HAILSTRUCTTYPE_POSITIVE_POS_MOD},
    {.x = 66,  .y = 120, .bPosition = B_POSITION_PLAYER_RIGHT,   .type = HAILSTRUCTTYPE_POSITIVE_POS_MOD},
    {.x = 182, .y = 120, .bPosition = B_POSITION_OPPONENT_RIGHT, .type = HAILSTRUCTTYPE_NEGATIVE_POS_MOD},
    {.x = 60,  .y = 120, .bPosition = B_POSITION_PLAYER_LEFT,    .type = HAILSTRUCTTYPE_FIXED_POSITION},
    {.x = 214, .y = 120, .bPosition = B_POSITION_OPPONENT_LEFT,  .type = HAILSTRUCTTYPE_NEGATIVE_POS_MOD},
    {.x = 113, .y = 120, .bPosition = B_POSITION_PLAYER_LEFT,    .type = HAILSTRUCTTYPE_POSITIVE_POS_MOD},
    {.x = 210, .y = 120, .bPosition = B_POSITION_OPPONENT_RIGHT, .type = HAILSTRUCTTYPE_POSITIVE_POS_MOD},
    {.x = 38,  .y = 120, .bPosition = B_POSITION_PLAYER_RIGHT,   .type = HAILSTRUCTTYPE_NEGATIVE_POS_MOD},
};

static const union AffineAnimCmd sAffineAnim_HailParticle_0[] =
{
    AFFINEANIMCMD_FRAME(0x100, 0x100, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_HailParticle_1[] =
{
    AFFINEANIMCMD_FRAME(0xF0, 0xF0, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_HailParticle_2[] =
{
    AFFINEANIMCMD_FRAME(0xE0, 0xE0, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_WeatherBallIceDown[] =
{
    AFFINEANIMCMD_FRAME(0x150, 0x150, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd *const sAffineAnims_HailParticle[] =
{
    sAffineAnim_HailParticle_0,
    sAffineAnim_HailParticle_1,
    sAffineAnim_HailParticle_2,
};

static const union AffineAnimCmd *const sAffineAnims_WeatherBallIceDown[] =
{
    sAffineAnim_WeatherBallIceDown,
};

const struct SpriteTemplate gHailParticleSpriteTemplate =
{
    .tileTag = ANIM_TAG_HAIL,
    .paletteTag = ANIM_TAG_HAIL,
    .oam = &gOamData_AffineNormal_ObjNormal_16x16,
    .anims = gDummySpriteAnimTable,
    .images = NULL,
    .affineAnims = sAffineAnims_HailParticle,
    .callback = AnimHailBegin,
};

const struct SpriteTemplate gWeatherBallIceDownSpriteTemplate =
{
    .tileTag = ANIM_TAG_HAIL,
    .paletteTag = ANIM_TAG_HAIL,
    .oam = &gOamData_AffineNormal_ObjNormal_16x16,
    .anims = gDummySpriteAnimTable,
    .images = NULL,
    .affineAnims = sAffineAnims_WeatherBallIceDown,
    .callback = AnimWeatherBallDown,
};

static const union AnimCmd sAnim_IceBallChunk_0[] =
{
    ANIMCMD_FRAME(0, 1),
    ANIMCMD_END,
};

static const union AnimCmd sAnim_IceBallChunk_1[] =
{
    ANIMCMD_FRAME(16, 4),
    ANIMCMD_FRAME(32, 4),
    ANIMCMD_FRAME(48, 4),
    ANIMCMD_FRAME(64, 4),
    ANIMCMD_END,
};

static const union AnimCmd *const sAnims_IceBallChunk[] =
{
    sAnim_IceBallChunk_0,
    sAnim_IceBallChunk_1,
};

static const union AffineAnimCmd sAffineAnim_IceBallChunk_0[] =
{
    AFFINEANIMCMD_FRAME(0xE0, 0xE0, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_IceBallChunk_1[] =
{
    AFFINEANIMCMD_FRAME(0x118, 0x118, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_IceBallChunk_2[] =
{
    AFFINEANIMCMD_FRAME(0x150, 0x150, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_IceBallChunk_3[] =
{
    AFFINEANIMCMD_FRAME(0x180, 0x180, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd sAffineAnim_IceBallChunk_4[] =
{
    AFFINEANIMCMD_FRAME(0x1C0, 0x1C0, 0, 0),
    AFFINEANIMCMD_END,
};

static const union AffineAnimCmd *const sAffineAnims_IceBallChunk[] =
{
    sAffineAnim_IceBallChunk_0,
    sAffineAnim_IceBallChunk_1,
    sAffineAnim_IceBallChunk_2,
    sAffineAnim_IceBallChunk_3,
    sAffineAnim_IceBallChunk_4,
};

const struct SpriteTemplate gIceBallChunkSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CHUNK,
    .paletteTag = ANIM_TAG_ICE_CHUNK,
    .oam = &gOamData_AffineDouble_ObjNormal_32x32,
    .anims = sAnims_IceBallChunk,
    .images = NULL,
    .affineAnims = sAffineAnims_IceBallChunk,
    .callback = InitIceBallAnim,
};

const struct SpriteTemplate gIceBallImpactShardSpriteTemplate =
{
    .tileTag = ANIM_TAG_ICE_CRYSTALS,
    .paletteTag = ANIM_TAG_ICE_CRYSTALS,
    .oam = &gOamData_AffineOff_ObjNormal_8x8,
    .anims = sAnims_IceCrystalSmall,
    .images = NULL,
    .affineAnims = gDummySpriteAffineAnimTable,
    .callback = InitIceBallParticle,
};

// Unused
static void AnimUnusedIceCrystalThrow(struct Sprite *sprite)
{
    s16 targetX, targetY, attackerX, attackerY;

    sprite->oam.tileNum += 7;
    targetX = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2);
    targetY = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET);
    attackerX = GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_X_2);
    attackerY = GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_Y_PIC_OFFSET);
    sprite->data[0] = gBattleAnimArgs[4];
    sprite->data[1] = gBattleAnimArgs[0] + attackerX;
    sprite->data[2] = gBattleAnimArgs[2] + targetX;
    sprite->data[3] = gBattleAnimArgs[1] + attackerY;
    sprite->data[4] = gBattleAnimArgs[3] + targetY;
    ConvertPosDataToTranslateLinearData(sprite);

    for (;(targetX >= -32 && targetX <= DISPLAY_WIDTH + 32) && (targetY >= -32 && targetY <= DISPLAY_HEIGHT + 32);
           targetX += sprite->data[1], targetY += sprite->data[2])
        ;

    sprite->data[1] = -sprite->data[1];
    sprite->data[2] = -sprite->data[2];
    for (;(attackerX >= -32 && attackerX <= DISPLAY_WIDTH + 32) && (attackerY >= -32 && attackerY <= DISPLAY_HEIGHT + 32);
           attackerX += sprite->data[1], attackerY += sprite->data[2])
        ;

    sprite->x = attackerX;
    sprite->y = attackerY;
    sprite->data[0] = gBattleAnimArgs[4];
    sprite->data[1] = attackerX;
    sprite->data[2] = targetX;
    sprite->data[3] = attackerY;
    sprite->data[4] = targetY;
    ConvertPosDataToTranslateLinearData(sprite);
    sprite->data[3] = gBattleAnimArgs[5];
    sprite->data[4] = gBattleAnimArgs[6];
    sprite->callback = AnimUnusedIceCrystalThrow_Step;
}

static void AnimUnusedIceCrystalThrow_Step(struct Sprite *sprite)
{
    if (sprite->data[0] != 0)
    {
        sprite->data[5] += sprite->data[1];
        sprite->data[6] += sprite->data[2];
        sprite->x2 = sprite->data[5];
        sprite->y2 = sprite->data[6];
        sprite->x2 += Sin(sprite->data[7], sprite->data[3]);
        sprite->y2 += Sin(sprite->data[7], sprite->data[3]);
        sprite->data[7] = (sprite->data[7] + sprite->data[4]) & 0xFF;
        sprite->data[0]--;
    }
    else
    {
        DestroyAnimSprite(sprite);
    }
}

// Animates the swirling ice crystals in Ice Punch.
// arg 0: initial position angle around circle (0-256)
static void AnimIcePunchSwirlingParticle(struct Sprite *sprite)
{
    sprite->data[0] = gBattleAnimArgs[0];
    sprite->data[1] = 60;
    sprite->data[2] = 9;
    sprite->data[3] = 30;
    sprite->data[4] = -512;
    StoreSpriteCallbackInData6(sprite, DestroyAnimSprite);
    sprite->callback = TranslateSpriteInGrowingCircle;
    sprite->callback(sprite);
}

// Animates the ice particles in Ice Beam.
// arg 0: initial x pixel offset
// arg 1: initial y pixel offset
// arg 2: target x offset
// arg 3: target y offset
// arg 4: duration
static void AnimIceBeamParticle(struct Sprite *sprite)
{
    InitSpritePosToAnimAttacker(sprite, TRUE);
    sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2);

    if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
        sprite->data[2] -= gBattleAnimArgs[2];
    else
        sprite->data[2] += gBattleAnimArgs[2];

    sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET) + gBattleAnimArgs[3];
    sprite->data[0] = gBattleAnimArgs[4];
    StoreSpriteCallbackInData6(sprite, DestroyAnimSprite);
    sprite->callback = StartAnimLinearTranslation;
}

// Animates the ice crystals at the end of Ice Punch, Ice Beam, Tri Attack,
// Weather Ball (Hail), Blizzard, and Powder Snow.
// arg 0: target x offset (dual-target branch only; may be negated)
// arg 1: target y offset (dual-target branch only)
// arg 2: 0 = single target; non-zero = dual targets (average positions + args 0–1).
static void AnimIceEffectParticle(struct Sprite *sprite)
{
    if (gBattleAnimArgs[2] == 0)
    {
        InitSpritePosToAnimTarget(sprite, TRUE);
    }
    else
    {
        SetAverageBattlerPositions(gBattleAnimTarget, TRUE, &sprite->x, &sprite->y);
        if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
            gBattleAnimArgs[0] = -gBattleAnimArgs[0];

        sprite->x += gBattleAnimArgs[0];
        sprite->y += gBattleAnimArgs[1];
    }

    StoreSpriteCallbackInData6(sprite, AnimFlickerIceEffectParticle);
    sprite->callback = RunStoredCallbackWhenAffineAnimEnds;
}

static void AnimFlickerIceEffectParticle(struct Sprite *sprite)
{
    sprite->invisible ^= 1;
    sprite->data[0] += 1;
    if (sprite->data[0] == 20)
        DestroySpriteAndMatrix(sprite);
}

// Animates the small snowballs that swirl around the target in Blizzard and Icy Wind.
// arg 0: initial x pixel offset
// arg 1: initial y pixel offset
// arg 2: target x offset
// arg 3: target y offset
// arg 4: particle speed (sub-pixel / fixed-point rate for InitAnimFastLinearTranslationWithSpeed)
// arg 5: 0 = single target, non-zero = dual targets (average positions)
static void AnimSwirlingSnowball(struct Sprite *sprite)
{
    int i;
    s16 tempDataHolder[8];

    InitSpritePosToAnimAttacker(sprite, TRUE);

    sprite->data[0] = gBattleAnimArgs[4];
    sprite->data[1] = sprite->x;
    sprite->data[3] = sprite->y;

    if (!gBattleAnimArgs[5])
    {
        sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2);
        sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET) + gBattleAnimArgs[3];
    }
    else
    {
        SetAverageBattlerPositions(gBattleAnimTarget, TRUE, &sprite->data[2], &sprite->data[4]);
    }

    if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
        sprite->data[2] -= gBattleAnimArgs[2];
    else
        sprite->data[2] += gBattleAnimArgs[2];

    for (i = 0; i < 8; i++)
        tempDataHolder[i] = sprite->data[i];

    InitAnimFastLinearTranslationWithSpeed(sprite);
    sprite->data[1] ^= 1;
    sprite->data[2] ^= 1;

    while (1)
    {
        sprite->data[0] = 1;
        AnimFastTranslateLinear(sprite);

        if (sprite->x + sprite->x2 > DISPLAY_WIDTH + 16
         || sprite->x + sprite->x2 < -16
         || sprite->y + sprite->y2 > DISPLAY_HEIGHT
         || sprite->y + sprite->y2 < -16)
            break;
    }

    sprite->x += sprite->x2;
    sprite->y += sprite->y2;
    sprite->x2 = sprite->y2 = 0;

    for (i = 0; i < 8; i++)
        sprite->data[i] = tempDataHolder[i];

    sprite->callback = InitAnimFastLinearTranslationWithSpeedAndPos;
    StoreSpriteCallbackInData6(sprite, AnimSwirlingSnowball_Step1);
}

static void AnimSwirlingSnowball_Step1(struct Sprite *sprite)
{
    s16 battlerSide;

    sprite->x += sprite->x2;
    sprite->y += sprite->y2;
    sprite->x2 = sprite->y2 = 0;
    sprite->data[0] = 128;

    battlerSide = GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER ? 20 : -20;

    sprite->data[3] = Sin(sprite->data[0], battlerSide);
    sprite->data[4] = Cos(sprite->data[0], 0xF);
    sprite->data[5] = 0;
    sprite->callback = AnimSwirlingSnowball_Step2;
    sprite->callback(sprite);
}

static void AnimSwirlingSnowball_Step2(struct Sprite *sprite)
{
    s16 battlerSide;
    battlerSide = GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER ? 20 : -20;

    if (sprite->data[5] <= 31)
    {
        sprite->x2 = Sin(sprite->data[0], battlerSide) - sprite->data[3];
        sprite->y2 = Cos(sprite->data[0], 15)      - sprite->data[4];
        sprite->data[0] = (sprite->data[0] + 16) & 0xFF;
        sprite->data[5]++;
    }
    else
    {
        sprite->x += sprite->x2;
        sprite->y += sprite->y2;
        sprite->x2 = sprite->y2 = 0;
        sprite->data[3] = sprite->data[4] = 0;
        sprite->callback = AnimSwirlingSnowball_End;
    }
}

static void AnimSwirlingSnowball_End(struct Sprite *sprite)
{
    sprite->data[0] = 1;
    AnimFastTranslateLinear(sprite);

    if (sprite->x + sprite->x2 > 256
     || sprite->x + sprite->x2 < -16
     || sprite->y + sprite->y2 > 256
     || sprite->y + sprite->y2 < -16)
        DestroyAnimSprite(sprite);
}

// Phase 1: straight move from attacker toward the target, stepping in a loop until the
// sprite leaves the screen (simulates starting from off-screen). Phase 2: same linear move
// toward the target, but each frame adds vertical wobble (Sin) so the path wiggles.
// gBlizzardIceCrystalSpriteTemplate (large ice shards) and gPowderSnowSnowballSpriteTemplate
// (small snowballs) — not the gSwirlingSnowball path.
// arg 0: initial x pixel offset
// arg 1: initial y pixel offset
// arg 2: target x offset
// arg 3: target y offset
// arg 4: speed (sub-pixel / fixed-point rate for InitAnimFastLinearTranslationWithSpeed)
// arg 5: amplitude passed to Sin() for vertical wobble on y2 during the wiggle phase
// arg 6: angle added to phase each frame (data[7] += arg6)
// arg 7: 0 = single target, non-zero = dual targets (average positions)
static void AnimMoveParticleBeyondTarget(struct Sprite *sprite)
{
    int i;
    s16 tempDataHolder[8];

    InitSpritePosToAnimAttacker(sprite, TRUE);

    sprite->data[0] = gBattleAnimArgs[4];
    sprite->data[1] = sprite->x;
    sprite->data[3] = sprite->y;

    if (!gBattleAnimArgs[7])
    {
        sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2);
        sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET);
    }
    else
    {
        SetAverageBattlerPositions(gBattleAnimTarget, TRUE, &sprite->data[2], &sprite->data[4]);
    }

    if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
        sprite->data[2] -= gBattleAnimArgs[2];
    else
        sprite->data[2] += gBattleAnimArgs[2];

    sprite->data[4] += gBattleAnimArgs[3];
    InitAnimFastLinearTranslationWithSpeed(sprite);
    for (i = 0; i < 8; i++)
        tempDataHolder[i] = sprite->data[i];

    sprite->data[1] ^= 1;
    sprite->data[2] ^= 1;

    while (1)
    {
        sprite->data[0] = 1;
        AnimFastTranslateLinear(sprite);
        if (sprite->x + sprite->x2 > DISPLAY_WIDTH + 16
         || sprite->x + sprite->x2 < -16
         || sprite->y + sprite->y2 > DISPLAY_HEIGHT
         || sprite->y + sprite->y2 < -16)
            break;
    }

    sprite->x += sprite->x2;
    sprite->y += sprite->y2;
    sprite->x2 = sprite->y2 = 0;

    for (i = 0; i < 8; i++)
        sprite->data[i] = tempDataHolder[i];

    sprite->data[5] = gBattleAnimArgs[5];
    sprite->data[6] = gBattleAnimArgs[6];
    sprite->callback = AnimWiggleParticleTowardsTarget;
}

// Moves particles in a sine wave towards the target.
static void AnimWiggleParticleTowardsTarget(struct Sprite *sprite)
{
    AnimFastTranslateLinear(sprite);
    if (sprite->data[0] == 0)
        sprite->data[0] = 1;

    sprite->y2 += Sin(sprite->data[7], sprite->data[5]);
    sprite->data[7] = (sprite->data[7] + sprite->data[6]) & 0xFF;
    if (sprite->data[0] == 1)
    {
        if (sprite->x + sprite->x2 > DISPLAY_WIDTH + 16
         || sprite->x + sprite->x2 < -16
         || sprite->y + sprite->y2 > DISPLAY_HEIGHT
         || sprite->y + sprite->y2 < -16)
            DestroyAnimSprite(sprite);
    }
}

// Rising ground ice spikes near the end of the Icy Wind move animation.
// arg 0: x offset (dual-target branch only; flipped for opponent attacker)
// arg 1: y offset (dual-target branch only)
// arg 2: 0 = single target (InitSpritePosToAnimTarget), non-zero = dual (average + offsets)
static void AnimWaveFromCenterOfTarget(struct Sprite *sprite)
{
    if (sprite->data[0] == 0)
    {
        if (gBattleAnimArgs[2] == 0)
        {
            InitSpritePosToAnimTarget(sprite, FALSE);
        }
        else
        {
            SetAverageBattlerPositions(gBattleAnimTarget, FALSE, &sprite->x, &sprite->y);

            if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
                gBattleAnimArgs[0] = -gBattleAnimArgs[0];

            sprite->x += gBattleAnimArgs[0];
            sprite->y += gBattleAnimArgs[1];
        }

        sprite->data[0]++;
    }
    else
    {
        if (sprite->animEnded)
            DestroyAnimSprite(sprite);
    }
}

// Mist / Smog: fog puffs. First moves in a straight line (InitAnimLinearTranslation) while
// the callback adds a sine/cos wobble on top; then continues with the wobble callback.
// arg 0: initial x pixel offset (from attacker or from target; which side is set by arg 4)
// arg 1: initial y pixel offset
// arg 2: Y delta added to start Y to get the straight-move destination (end Y of that segment)
// arg 3: number of frames for that straight move (counts down each frame)
// arg 4: 0 = position from attacker, non-zero = position from target (defender)
// arg 5: 0 = single target, non-zero = dual targets (average positions; doubles wobble width)
static void InitSwirlingFogAnim(struct Sprite *sprite)
{
    if (gBattleAnimArgs[4] == 0)
    {
        if (gBattleAnimArgs[5] == 0)
        {
            InitSpritePosToAnimAttacker(sprite, FALSE);
        }
        else
        {
            SetAverageBattlerPositions(gBattleAnimAttacker, FALSE, &sprite->x, &sprite->y);
            if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
                sprite->x -= gBattleAnimArgs[0];
            else
                sprite->x += gBattleAnimArgs[0];

            sprite->y += gBattleAnimArgs[1];
        }

        sprite->data[7] = gBattleAnimAttacker;
    }
    else
    {
        if (gBattleAnimArgs[5] == 0)
        {
            InitSpritePosToAnimTarget(sprite, FALSE);
        }
        else
        {
            SetAverageBattlerPositions(gBattleAnimTarget, FALSE, &sprite->x, &sprite->y);
            if (GetBattlerSide(gBattleAnimTarget) != B_SIDE_PLAYER)
                sprite->x -= gBattleAnimArgs[0];
            else
                sprite->x += gBattleAnimArgs[0];

            sprite->y += gBattleAnimArgs[1];
        }

        sprite->data[7] = gBattleAnimTarget;
    }

    if (gBattleAnimArgs[5] == 0 || !IsDoubleBattle())
        sprite->data[6] = 0x20;
    else
        sprite->data[6] = 0x40;

    if (GetBattlerSide(gBattleAnimTarget) == B_SIDE_PLAYER)
        sprite->y += 8;

    sprite->data[0] = gBattleAnimArgs[3];
    sprite->data[1] = sprite->x;
    sprite->data[2] = sprite->x;
    sprite->data[3] = sprite->y;
    sprite->data[4] = sprite->y + gBattleAnimArgs[2];

    InitAnimLinearTranslation(sprite);

    sprite->data[5] = 64;
    sprite->callback = AnimSwirlingFogAnim;
    sprite->callback(sprite);
}

// Animates swirling fog initialized by InitSwirlingFogAnim.
static void AnimSwirlingFogAnim(struct Sprite *sprite)
{
    if (!AnimTranslateLinear(sprite))
    {
        sprite->x2 += Sin(sprite->data[5], sprite->data[6]);
        sprite->y2 += Cos(sprite->data[5], -6);

        if (sprite->data[5] > 63 && sprite->data[5] < 192)
            sprite->oam.priority = GetBattlerSpriteBGPriority(sprite->data[7]);
        else
            sprite->oam.priority = GetBattlerSpriteBGPriority(sprite->data[7]) + 1;

        sprite->data[5] = (sprite->data[5] + 3) & 0xFF;
    }
    else
    {
        DestroyAnimSprite(sprite);
    }
}

// Adds moving foggy overlay. Used by Haze.
void AnimTask_HazeScrollingFog(u8 taskId)
{
    struct BattleAnimBgData animBg;

    SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG1 | BLDCNT_EFFECT_BLEND | BLDCNT_TGT2_ALL);
    SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(0, 16));

    SetAnimBgAttribute(1, BG_ANIM_PRIORITY, 1);
    SetAnimBgAttribute(1, BG_ANIM_SCREEN_SIZE, 0);

    if (!IsContest())
        SetAnimBgAttribute(1, BG_ANIM_CHAR_BASE_BLOCK, 1);

    gBattle_BG1_X = 0;
    gBattle_BG1_Y = 0;
    SetGpuReg(REG_OFFSET_BG1HOFS, gBattle_BG1_X);
    SetGpuReg(REG_OFFSET_BG1VOFS, gBattle_BG1_Y);

    GetBattleAnimBg1Data(&animBg);
    LoadBgTiles(animBg.bgId, gWeatherFogHorizontalTiles, 0x800, animBg.tilesOffset);
    AnimLoadCompressedBgTilemapHandleContest(&animBg, gBattleAnimFogTilemap, FALSE);
    LoadPalette(&gFogPalette, BG_PLTT_ID(animBg.paletteId), PLTT_SIZE_4BPP);

    gTasks[taskId].func = AnimTask_HazeScrollingFog_Step;
}

static void AnimTask_HazeScrollingFog_Step(u8 taskId)
{
    struct BattleAnimBgData animBg;

    gBattle_BG1_X += -1;
    gBattle_BG1_Y += 0;

    switch (gTasks[taskId].data[12])
    {
    case 0:
        if (++gTasks[taskId].data[10] == 4)
        {
            gTasks[taskId].data[10] = 0;
            gTasks[taskId].data[9]++;
            gTasks[taskId].data[11] = sHazeBlendAmounts[gTasks[taskId].data[9]];

            SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(gTasks[taskId].data[11], 16 - gTasks[taskId].data[11]));
            if (gTasks[taskId].data[11] == 9)
            {
                gTasks[taskId].data[12]++;
                gTasks[taskId].data[11] = 0;
            }
        }
        break;
    case 1:
        if (++gTasks[taskId].data[11] == 0x51)
        {
            gTasks[taskId].data[11] = 9;
            gTasks[taskId].data[12]++;
        }
        break;
    case 2:
        if (++gTasks[taskId].data[10] == 4)
        {
            gTasks[taskId].data[10] = 0;
            gTasks[taskId].data[11]--;

            SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(gTasks[taskId].data[11], 16 - gTasks[taskId].data[11]));
            if (gTasks[taskId].data[11] == 0)
            {
                gTasks[taskId].data[12]++;
                gTasks[taskId].data[11] = 0;
            }
        }
        break;
    case 3:
        GetBattleAnimBg1Data(&animBg);
        ClearBattleAnimBg(1);
        ClearBattleAnimBg(2);
        gTasks[taskId].data[12]++;
        // fall through
    case 4:
        if (!IsContest())
            SetAnimBgAttribute(1, BG_ANIM_CHAR_BASE_BLOCK, 0);

        gBattle_BG1_X = 0;
        gBattle_BG1_Y = 0;
        SetGpuReg(REG_OFFSET_BLDCNT, 0);
        SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(0, 0));
        SetAnimBgAttribute(1, BG_ANIM_PRIORITY, 1);
        DestroyAnimVisualTask(taskId);
        break;
    }
}

// Mist Ball projectile: one frame sets start on the attacker, then TranslateAnimSpriteToTargetMonLocation
// runs the move to the target. Args 0–5 are consumed there. Arg 5 packs two flags in one u16: low byte
// picks which target Y coordinate is used; high byte picks whether attacker coords use mon pic offsets.
static void AnimThrowMistBall(struct Sprite *sprite)
{
    // First two lines are redundant with the code in TranslateAnimSpriteToTargetMonLocation.
    sprite->x = GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_X_2);
    sprite->y = GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_Y_PIC_OFFSET);
    sprite->callback = TranslateAnimSpriteToTargetMonLocation;
}

// Displays misty background in Mist Ball.
void AnimTask_MistBallFog(u8 taskId)
{
    struct BattleAnimBgData animBg;

    SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG1 | BLDCNT_EFFECT_BLEND | BLDCNT_TGT2_ALL);
    SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(0, 16));
    SetAnimBgAttribute(1, BG_ANIM_PRIORITY, 1);
    SetAnimBgAttribute(1, BG_ANIM_SCREEN_SIZE, 0);

    if (!IsContest())
        SetAnimBgAttribute(1, BG_ANIM_CHAR_BASE_BLOCK, 1);

    gBattle_BG1_X = 0;
    gBattle_BG1_Y = 0;
    SetGpuReg(REG_OFFSET_BG1HOFS, gBattle_BG1_X);
    SetGpuReg(REG_OFFSET_BG1VOFS, gBattle_BG1_Y);

    GetBattleAnimBg1Data(&animBg);
    LoadBgTiles(animBg.bgId, gWeatherFogHorizontalTiles, 0x800, animBg.tilesOffset);
    AnimLoadCompressedBgTilemapHandleContest(&animBg, gBattleAnimFogTilemap, FALSE);
    LoadPalette(&gFogPalette, BG_PLTT_ID(animBg.paletteId), PLTT_SIZE_4BPP);

    gTasks[taskId].data[15] = -1;
    gTasks[taskId].func = AnimTask_MistBallFog_Step;
}

static void AnimTask_MistBallFog_Step(u8 taskId)
{
    struct BattleAnimBgData animBg;

    gBattle_BG1_X += gTasks[taskId].data[15];
    gBattle_BG1_Y += 0;

    switch (gTasks[taskId].data[12])
    {
    case 0:
        gTasks[taskId].data[9] += 1;
        gTasks[taskId].data[11] = sMistBlendAmounts[gTasks[taskId].data[9]];
        SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(gTasks[taskId].data[11], 17 - gTasks[taskId].data[11]));
        if (gTasks[taskId].data[11] == 5)
        {
            gTasks[taskId].data[12]++;
            gTasks[taskId].data[11] = 0;
        }
        break;
    case 1:
        if (++gTasks[taskId].data[11] == 0x51)
        {
            gTasks[taskId].data[11] = 5;
            gTasks[taskId].data[12]++;
        }
        break;
    case 2:
        if (++gTasks[taskId].data[10] == 4)
        {
            gTasks[taskId].data[10] = 0;
            gTasks[taskId].data[11] -= 1;
            SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(gTasks[taskId].data[11], 16 - gTasks[taskId].data[11]));
            if (gTasks[taskId].data[11] == 0)
            {
                gTasks[taskId].data[12]++;
                gTasks[taskId].data[11] = 0;
            }
        }
        break;
    case 3:
        GetBattleAnimBg1Data(&animBg);
        ClearBattleAnimBg(1);
        ClearBattleAnimBg(2);

        gTasks[taskId].data[12]++;

        // fall through
    case 4:
        if (!IsContest())
            SetAnimBgAttribute(1, BG_ANIM_CHAR_BASE_BLOCK, 0);

        gBattle_BG1_X = 0;
        gBattle_BG1_Y = 0;
        SetGpuReg(REG_OFFSET_BLDCNT, 0);
        SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(0, 0));
        SetAnimBgAttribute(1, BG_ANIM_PRIORITY, 1);
        DestroyAnimVisualTask(taskId);
        break;
    }
}

// Poison Gas purple cloud: straight approach with wobble, then scripted phases in MovePoisonGasCloud.
// arg 0: timer for first phase (decrements each frame until phase change)
// arg 1: x offset from attacker start
// arg 2: y offset from attacker start
// arg 3: x offset added to target coords for the first InitAnimLinearTranslation endpoint
// arg 4: y offset added to target coords for that endpoint
// arg 5, arg 6: unused (values in the Poison Gas script are ignored here)
// arg 7: 0 = target endpoint uses BATTLER_COORD_X / BATTLER_COORD_Y; non-zero uses X_2 / Y pic offset
static void InitPoisonGasCloudAnim(struct Sprite *sprite)
{
    sprite->data[0] = gBattleAnimArgs[0];

    if (GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_X_2) < GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2))
        sprite->data[7] = 0x8000;

    if (GET_BATTLER_SIDE2(gBattleAnimTarget) == B_SIDE_PLAYER)
    {
        gBattleAnimArgs[1] = -gBattleAnimArgs[1];
        gBattleAnimArgs[3] = -gBattleAnimArgs[3];

        if ((sprite->data[7] & 0x8000) && GET_BATTLER_SIDE2(gBattleAnimAttacker) == B_SIDE_PLAYER)
            sprite->subpriority = gSprites[GetAnimBattlerSpriteId(ANIM_TARGET)].subpriority + 1;

        sprite->data[6] = 1;
    }

    sprite->x = GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_X_2);
    sprite->y = GetBattlerSpriteCoord(gBattleAnimAttacker, BATTLER_COORD_Y_PIC_OFFSET);
    if (gBattleAnimArgs[7])
    {
        sprite->data[1] = sprite->x + gBattleAnimArgs[1];
        sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2) + gBattleAnimArgs[3];
        sprite->data[3] = sprite->y + gBattleAnimArgs[2];
        sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET) + gBattleAnimArgs[4];
        sprite->data[7] |= GetBattlerSpriteBGPriority(gBattleAnimTarget) << 8;
    }
    else
    {
        sprite->data[1] = sprite->x + gBattleAnimArgs[1];
        sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X) + gBattleAnimArgs[3];
        sprite->data[3] = sprite->y + gBattleAnimArgs[2];
        sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y) + gBattleAnimArgs[4];
        sprite->data[7] |= GetBattlerSpriteBGPriority(gBattleAnimTarget) << 8;
    }

    if (IsContest())
    {
        sprite->data[6] = 1;
        sprite->subpriority = 0x80;
    }

    InitAnimLinearTranslation(sprite);
    sprite->callback = MovePoisonGasCloud;
}

static void MovePoisonGasCloud(struct Sprite *sprite)
{
    switch (sprite->data[7] & 0xFF)
    {
    case 0:
        AnimTranslateLinear(sprite);
        sprite->x2 += (16 * gSineTable[sprite->data[5]]) >> 8;
        if (sprite->data[6])
            sprite->data[5] = (sprite->data[5] - 8) & 0xFF;
        else
            sprite->data[5] = (sprite->data[5] + 8) & 0xFF;

        if (sprite->data[0] <= 0)
        {
            sprite->data[0] = 80;
            sprite->x = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X);
            sprite->data[1] = sprite->x;
            sprite->data[2] = sprite->x;
            sprite->y += sprite->y2;
            sprite->data[3] = sprite->y;
            sprite->data[4] = sprite->y + 29;
            sprite->data[7]++;
            if (IsContest())
                sprite->data[5] = 80;
            else if (GET_BATTLER_SIDE2(gBattleAnimTarget) != B_SIDE_PLAYER)
                sprite->data[5] = 204;
            else
                sprite->data[5] = 80;

            sprite->y2 = 0;
            sprite->x2 = (gSineTable[sprite->data[5]] * 32) >> 8;
            sprite->data[5] = (sprite->data[5] + 2) & 0xFF;
            InitAnimLinearTranslation(sprite);
        }
        break;
    case 1:
        AnimTranslateLinear(sprite);
        sprite->x2 += (32 * gSineTable[sprite->data[5]]) >> 8;
        sprite->y2 += (gSineTable[sprite->data[5] + 0x40] * -3) >> 8;
        if (!IsContest())
        {
            if (sprite->data[5] > 63 && sprite->data[5] < 192)
                sprite->oam.priority = sprite->data[7] >> 8;
            else
                sprite->oam.priority = (sprite->data[7] >> 8) + 1;

            sprite->data[5] = (sprite->data[5] + 4) & 0xFF;
        }
        else
        {
            if (sprite->data[5] > 63 && sprite->data[5] < 192)
                sprite->subpriority = 128;
            else
                sprite->subpriority = 140;

            sprite->data[5] = (sprite->data[5] - 4) & 0xFF;
        }

        if (sprite->data[0] <= 0)
        {
            sprite->data[0] = 0x300;
            sprite->data[1] = sprite->x += sprite->x2;
            sprite->data[3] = sprite->y += sprite->y2;
            sprite->data[4] = sprite->y + 4;
            if (IsContest())
                sprite->data[2] = -16;
            else if (GET_BATTLER_SIDE2(gBattleAnimTarget) != B_SIDE_PLAYER)
                sprite->data[2] = DISPLAY_WIDTH + 16;
            else
                sprite->data[2] = -16;

            sprite->data[7]++;
            sprite->x2 = sprite->y2 = 0;
            InitAnimLinearTranslationWithSpeed(sprite);
        }
        break;
    case 2:
        if (AnimTranslateLinear(sprite))
        {
            if (sprite->oam.affineMode & 1)
            {
                FreeOamMatrix(sprite->oam.matrixNum);
                sprite->oam.affineMode = ST_OAM_AFFINE_OFF;
            }

            DestroySprite(sprite);
            gAnimVisualTaskCount--;
        }
        break;
    }
}

#define tState             data[0]
#define tSpriteCount       data[1]
#define tHailAffineAnimNum data[2]
#define tHailStructId      data[3]
#define tInitialDelayTimer data[4]
#define tHailSpawnTimer    data[5]

void AnimTask_Hail(u8 taskId)
{
    struct Task *task = &gTasks[taskId];

    task->func = AnimTask_Hail2;
}

static void AnimTask_Hail2(u8 taskId)
{
    struct Task *task = &gTasks[taskId];
    switch (task->tState)
    {
    case 0:
        if (++task->tInitialDelayTimer > 2)
        {
            task->tInitialDelayTimer = 0;
            task->tHailSpawnTimer = 0;
            task->tHailAffineAnimNum = 0;
            task->tState++;
        }
        break;
    case 1:
        if (task->tHailSpawnTimer == 0)
        {
            if (GenerateHailParticle(task->tHailStructId, task->tHailAffineAnimNum, taskId, 1))
                task->tSpriteCount++;

            if (++task->tHailAffineAnimNum == (int)ARRAY_COUNT(sAffineAnims_HailParticle))
            {
                if (++task->tHailStructId == (int)ARRAY_COUNT(sHailCoordData))
                    task->tState++;
                else
                    task->tState--;
            }
            else
            {
                task->tHailSpawnTimer = 1;
            }

        }
        else
        {
            task->tHailSpawnTimer--;
        }
        break;
    case 2:
        if (task->tSpriteCount == 0)
            DestroyAnimVisualTask(taskId);
        break;
    }
}

#undef tState
#undef tSpriteCount
#undef tHailAffineAnimNum
#undef tHailStructId
#undef tInitialDelayTimer
#undef tHailSpawnTimer

// Hail falling particle sprite vars
#define sSpawnImpactEffect data[0]
#define sTargetX           data[3]
#define sTargetY           data[4]
#define sAffineAnimNum     data[5]
#define sOwnerTaskId       data[6]
#define sOwnerTaskSpriteCountField data[7]

// hailStructId: index into sHailCoordData. affineAnimNum: hail affine variant.
// taskId: owner AnimTask_Hail2. c: gTasks[taskId].data[] index (e.g. tSpriteCount) for sprite bookkeeping.
// Returns TRUE if sprite created.
static bool8 GenerateHailParticle(u8 hailStructId, u8 affineAnimNum, u8 taskId, u8 c)
{
    u8 id;
    s16 battlerX, battlerY;
    s16 spriteX;
    bool8 shouldSpawnImpactEffect = FALSE;

    if (sHailCoordData[hailStructId].type != HAILSTRUCTTYPE_FIXED_POSITION)
    {
        id = GetBattlerAtPosition(sHailCoordData[hailStructId].bPosition);
        if (IsBattlerSpriteVisible(id))
        {
            shouldSpawnImpactEffect = TRUE;
            battlerX = GetBattlerSpriteCoord(id, BATTLER_COORD_X_2);
            battlerY = GetBattlerSpriteCoord(id, BATTLER_COORD_Y_PIC_OFFSET);
            switch (sHailCoordData[hailStructId].type)
            {
            case HAILSTRUCTTYPE_NEGATIVE_POS_MOD:
                battlerX -= GetBattlerSpriteCoordAttr(id, BATTLER_COORD_ATTR_WIDTH) / 6;
                battlerY -= GetBattlerSpriteCoordAttr(id, BATTLER_COORD_ATTR_HEIGHT) / 6;
                break;
            case HAILSTRUCTTYPE_POSITIVE_POS_MOD:
                battlerX += GetBattlerSpriteCoordAttr(id, BATTLER_COORD_ATTR_WIDTH) / 6;
                battlerY += GetBattlerSpriteCoordAttr(id, BATTLER_COORD_ATTR_HEIGHT) / 6;
                break;
            }
        }
        else
        {
            battlerX = sHailCoordData[hailStructId].x;
            battlerY = sHailCoordData[hailStructId].y;
        }
    }
    else
    {
        battlerX = sHailCoordData[hailStructId].x;
        battlerY = sHailCoordData[hailStructId].y;
    }
    spriteX = battlerX - ((battlerY + 8) / 2);
    id = CreateSprite(&gHailParticleSpriteTemplate, spriteX, -8, 18);
    if (id == MAX_SPRITES)
    {
        return FALSE;
    }

    StartSpriteAffineAnim(&gSprites[id], affineAnimNum);
    gSprites[id].sSpawnImpactEffect = shouldSpawnImpactEffect;
    gSprites[id].sTargetX           = battlerX;
    gSprites[id].sTargetY           = battlerY;
    gSprites[id].sAffineAnimNum     = affineAnimNum;
    gSprites[id].sOwnerTaskId       = taskId;
    gSprites[id].sOwnerTaskSpriteCountField = c;
    return TRUE;
}

static void AnimHailBegin(struct Sprite *sprite)
{
    sprite->x += 4;
    sprite->y += 8;

    if (sprite->x < sprite->sTargetX && sprite->y < sprite->sTargetY)
        return;

    if (sprite->sSpawnImpactEffect == 1 && sprite->sAffineAnimNum == 0)
    {
        sprite->data[0] = CreateSprite(&gIceCrystalHitLargeSpriteTemplate,
                                sprite->sTargetX, sprite->sTargetY, sprite->subpriority);

        if (sprite->data[0] != MAX_SPRITES)
        {
            // The sprite template we're using is shared amongst a few other 
            // places, which make the sprite flicker. That's not what we want 
            // here, though. Override the callback.
            gSprites[sprite->data[0]].callback = AnimHailContinue;
            gSprites[sprite->data[0]].sOwnerTaskId = sprite->sOwnerTaskId;
            gSprites[sprite->data[0]].sOwnerTaskSpriteCountField = sprite->sOwnerTaskSpriteCountField;
        }

        FreeOamMatrix(sprite->oam.matrixNum);
        DestroySprite(sprite);
    }
    else
    {
        gTasks[sprite->sOwnerTaskId].data[sprite->sOwnerTaskSpriteCountField]--;
        FreeOamMatrix(sprite->oam.matrixNum);
        DestroySprite(sprite);
    }
}

#undef sSpawnImpactEffect
#undef sTargetX
#undef sTargetY
#undef sAffineAnimNum

// Hail impact VFX sprite vars
#define sTimer data[0]

static void AnimHailContinue(struct Sprite *sprite)
{
    if (++sprite->sTimer == 20)
    {
        gTasks[sprite->sOwnerTaskId].data[sprite->sOwnerTaskSpriteCountField]--;
        FreeOamMatrix(sprite->oam.matrixNum);
        DestroySprite(sprite);
    }
}

#undef sTimer
#undef sOwnerTaskId
#undef sOwnerTaskSpriteCountField

// Initializes the animation for Ice Ball.
// arg 0: initial x pixel offset
// arg 1: initial y pixel offset
// arg 2: target x offset
// arg 3: target y offset
// arg 4: duration
// arg 5: arc height (negative)
static void InitIceBallAnim(struct Sprite *sprite)
{
    u8 animNum = gAnimDisableStructPtr->rolloutTimerStartValue - gAnimDisableStructPtr->rolloutTimer - 1;

    if (animNum > 4)
        animNum = 4;

    StartSpriteAffineAnim(sprite, animNum);
    InitSpritePosToAnimAttacker(sprite, TRUE);

    sprite->data[0] = gBattleAnimArgs[4];

    if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
        gBattleAnimArgs[2] = -gBattleAnimArgs[2];

    sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2) + gBattleAnimArgs[2];
    sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET) + gBattleAnimArgs[3];
    sprite->data[5] = gBattleAnimArgs[5];

    InitAnimArcTranslation(sprite);

    sprite->callback = AnimThrowIceBall;
}

// Throws the ball of ice in Ice Ball.
static void AnimThrowIceBall(struct Sprite *sprite)
{
    if (!TranslateAnimHorizontalArc(sprite))
        return;

    StartSpriteAnim(sprite, 1);
    sprite->callback = RunStoredCallbackWhenAnimEnds;
    StoreSpriteCallbackInData6(sprite, DestroyAnimSprite);
}

// Initializes the particles that scatter at the end of the Ice Ball animation.
static void InitIceBallParticle(struct Sprite *sprite)
{
    s16 xOffset, yOffset;

    sprite->oam.tileNum += 8;
    InitSpritePosToAnimTarget(sprite, TRUE);

    xOffset = (Random2() & 0xFF) + 256;
    yOffset = Random2() & 0x1FF;

    if (yOffset >= 256)
        yOffset = 256 - yOffset;

    sprite->data[1] = xOffset;
    sprite->data[2] = yOffset;
    sprite->callback = AnimIceBallParticle;
}

// Animates the particles created by InitIceBallParticle.
static void AnimIceBallParticle(struct Sprite *sprite)
{
    sprite->data[3] += sprite->data[1];
    sprite->data[4] += sprite->data[2];

    if (sprite->data[1] & 1)
        sprite->x2 = -(sprite->data[3] >> 8);
    else
        sprite->x2 = sprite->data[3] >> 8;

    sprite->y2 = sprite->data[4] >> 8;

    if (++sprite->data[0] == 21)
        DestroyAnimSprite(sprite);
}

void AnimTask_GetIceBallCounter(u8 taskId)
{
    u8 arg = gBattleAnimArgs[0];

    gBattleAnimArgs[arg] = gAnimDisableStructPtr->rolloutTimerStartValue - gAnimDisableStructPtr->rolloutTimer - 1;
    DestroyAnimVisualTask(taskId);
}