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field_effect_helpers.c
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#include "global.h"
#include "event_object_movement.h"
#include "field_camera.h"
#include "field_effect.h"
#include "field_effect_helpers.h"
#include "field_weather.h"
#include "fieldmap.h"
#include "gpu_regs.h"
#include "metatile_behavior.h"
#include "palette.h"
#include "sound.h"
#include "sprite.h"
#include "trig.h"
#include "constants/weather.h"
#include "constants/event_objects.h"
#include "constants/field_effects.h"
#include "constants/rgb.h"
#include "constants/songs.h"
#include "constants/rgb.h"
#include "constants/event_objects.h"
#define OBJ_EVENT_PAL_TAG_NONE 0x11FF // duplicate of define in event_object_movement.c
#define PAL_TAG_REFLECTION_OFFSET 0x2000 // reflection tag value is paletteTag + 0x2000
#define PAL_RAW_REFLECTION_OFFSET 0x4000 // raw reflection tag is paletteNum + 0x4000
#define HIGH_BRIDGE_PAL_TAG 0x4010
// Build a unique tag for reflection's palette based on based tag, or paletteNum
#define REFLECTION_PAL_TAG(tag, num) ((tag) == TAG_NONE ? (num) + PAL_RAW_REFLECTION_OFFSET : (tag) + PAL_TAG_REFLECTION_OFFSET)
static void UpdateObjectReflectionSprite(struct Sprite *);
static void LoadObjectReflectionPalette(struct ObjectEvent *objectEvent, struct Sprite *sprite);
static void LoadObjectHighBridgeReflectionPalette(struct ObjectEvent *, struct Sprite *sprite);
static void LoadObjectRegularReflectionPalette(struct ObjectEvent *, struct Sprite *);
static void UpdateGrassFieldEffectSubpriority(struct Sprite *, u8, u8);
static void FadeFootprintsTireTracks_Step0(struct Sprite *);
static void FadeFootprintsTireTracks_Step1(struct Sprite *);
static void UpdateFeetInFlowingWaterFieldEffect(struct Sprite *);
static void UpdateAshFieldEffect_Wait(struct Sprite *);
static void UpdateAshFieldEffect_Show(struct Sprite *);
static void UpdateAshFieldEffect_End(struct Sprite *);
static void SynchroniseSurfAnim(struct ObjectEvent *, struct Sprite *);
static void SynchroniseSurfPosition(struct ObjectEvent *, struct Sprite *);
static void UpdateBobbingEffect(struct ObjectEvent *, struct Sprite *, struct Sprite *);
static void SpriteCB_UnderwaterSurfBlob(struct Sprite *);
static u32 ShowDisguiseFieldEffect(u8, u8, u8);
u32 FldEff_Shadow(void);
// Data used by all the field effects that share UpdateJumpImpactEffect
#define sJumpElevation data[0]
#define sJumpFldEff data[1]
// Data used by all the field effects that share WaitFieldEffectSpriteAnim
#define sWaitFldEff data[0]
#define sReflectionObjEventId data[0]
#define sReflectionObjEventLocalId data[1]
#define sReflectionVerticalOffset data[2]
#define sIsStillReflection data[7]
void SetUpShadow(struct ObjectEvent *objectEvent, struct Sprite *sprite)
{
gFieldEffectArguments[0] = objectEvent->localId;
gFieldEffectArguments[1] = gSaveBlock1Ptr->location.mapNum;
gFieldEffectArguments[2] = gSaveBlock1Ptr->location.mapGroup;
FldEff_Shadow();
}
void SetUpReflection(struct ObjectEvent *objectEvent, struct Sprite *sprite, bool8 stillReflection, bool8 isMirror)
{
struct Sprite *reflectionSprite;
//reflection
reflectionSprite = &gSprites[CreateCopySpriteAt(sprite, sprite->x, sprite->y, 152)];
reflectionSprite->callback = UpdateObjectReflectionSprite;
reflectionSprite->oam.priority = 3;
reflectionSprite->usingSheet = TRUE;
reflectionSprite->anims = gDummySpriteAnimTable;
StartSpriteAnim(reflectionSprite, 0);
reflectionSprite->affineAnims = gDummySpriteAffineAnimTable;
reflectionSprite->affineAnimBeginning = TRUE;
reflectionSprite->subspriteMode = SUBSPRITES_IGNORE_PRIORITY;
reflectionSprite->subspriteTableNum = 0;
reflectionSprite->sReflectionObjEventId = sprite->sReflectionObjEventId;
reflectionSprite->sReflectionObjEventLocalId = objectEvent->localId;
reflectionSprite->sIsStillReflection = stillReflection;
LoadObjectReflectionPalette(objectEvent, reflectionSprite);
if (!stillReflection)
reflectionSprite->oam.affineMode = ST_OAM_AFFINE_NORMAL;
}
static s16 GetReflectionVerticalOffset(struct ObjectEvent *objectEvent)
{
return GetObjectEventGraphicsInfo(objectEvent->graphicsId)->height - 2;
}
#define OBJ_EVENT_PAL_TAG_BRIDGE_REFLECTION 0x1102
static void LoadObjectReflectionPalette(struct ObjectEvent *objectEvent, struct Sprite *reflectionSprite)
{
u8 bridgeType;
u16 bridgeReflectionVerticalOffsets[] = {
[BRIDGE_TYPE_POND_LOW - 1] = 12,
[BRIDGE_TYPE_POND_MED - 1] = 28,
[BRIDGE_TYPE_POND_HIGH - 1] = 44
};
reflectionSprite->sReflectionVerticalOffset = 0;
if ((bridgeType = MetatileBehavior_GetBridgeType(objectEvent->previousMetatileBehavior))
|| (bridgeType = MetatileBehavior_GetBridgeType(objectEvent->currentMetatileBehavior)))
{
reflectionSprite->sReflectionVerticalOffset = bridgeReflectionVerticalOffsets[bridgeType - 1];
LoadObjectHighBridgeReflectionPalette(objectEvent, reflectionSprite);
}
else
{
LoadObjectRegularReflectionPalette(objectEvent, reflectionSprite);
}
}
// Apply a blue tint effect to a palette
static void ApplyPondFilter(u8 paletteNum, u16 *dest)
{
u32 i, r, g, b;
// CpuCopy16(gPlttBufferUnfaded + 0x100 + paletteNum * 16, dest, 32);
u16 *src = gPlttBufferUnfaded + OBJ_PLTT_ID(paletteNum);
*dest++ = *src++; // copy transparency
for (i = 0; i < 16 - 1; i++)
{
r = GET_R(src[i]);
g = GET_G(src[i]);
b = GET_B(src[i]);
b += 10;
if (b > 31)
b = 31;
*dest++ = RGB2(r, g, b);
}
}
// Apply a ice tint effect to a palette
static void ApplyIceFilter(u8 paletteNum, u16 *dest)
{
u32 i, r, g, b;
// CpuCopy16(gPlttBufferUnfaded + 0x100 + paletteNum * 16, dest, 32);
u16 *src = gPlttBufferUnfaded + OBJ_PLTT_ID(paletteNum);
*dest++ = *src++; // copy transparency
for (i = 0; i < 16 - 1; i++)
{
r = GET_R(src[i]);
r -= 5;
if (r > 31)
r = 0;
g = GET_G(src[i]);
g += 3;
if (g > 31)
g = 31;
b = GET_B(src[i]);
b += 16;
if (b > 31)
b = 31;
*dest++ = RGB2(r, g, b);
}
}
static void LoadObjectRegularReflectionPalette(struct ObjectEvent *objectEvent, struct Sprite *sprite)
{
const struct Sprite *mainSprite = &gSprites[objectEvent->spriteId];
u16 baseTag = GetSpritePaletteTagByPaletteNum(mainSprite->oam.paletteNum);
u16 paletteTag = REFLECTION_PAL_TAG(baseTag, mainSprite->oam.paletteNum);
u8 paletteNum = IndexOfSpritePaletteTag(paletteTag);
if (paletteNum <= 16)
{
// Load filtered palette
u16 filteredData[16];
struct SpritePalette filteredPal = {.tag = paletteTag, .data = filteredData};
if (sprite->sIsStillReflection == FALSE)
ApplyPondFilter(mainSprite->oam.paletteNum, filteredData);
else
ApplyIceFilter(mainSprite->oam.paletteNum, filteredData);
paletteNum = LoadSpritePalette(&filteredPal);
UpdateSpritePaletteWithWeather(paletteNum);
}
sprite->oam.paletteNum = paletteNum;
sprite->oam.objMode = ST_OAM_OBJ_BLEND;
}
// When walking on a bridge high above water (Route 120), the reflection is a solid dark blue color.
// This is so the sprite blends in with the dark water metatile underneath the bridge.
static void LoadObjectHighBridgeReflectionPalette(struct ObjectEvent *objectEvent, struct Sprite *sprite)
{
u16 blueData[16];
struct SpritePalette bluePalette = {.tag = HIGH_BRIDGE_PAL_TAG, .data = blueData};
CpuFill16(0x55C9, blueData, PLTT_SIZE_4BPP);
sprite->oam.paletteNum = LoadSpritePalette(&bluePalette);
UpdateSpritePaletteWithWeather(sprite->oam.paletteNum);
}
static void UpdateObjectReflectionSprite(struct Sprite *reflectionSprite)
{
struct ObjectEvent *objectEvent = &gObjectEvents[reflectionSprite->sReflectionObjEventId];
struct Sprite *mainSprite = &gSprites[objectEvent->spriteId];
if (!objectEvent->active || !objectEvent->hasReflection || objectEvent->localId != reflectionSprite->sReflectionObjEventLocalId)
{
reflectionSprite->inUse = FALSE;
FieldEffectFreePaletteIfUnused(reflectionSprite->oam.paletteNum);
return;
}
// Only filter palette if not using the high bridge blue palette
// This is basically a copy of LoadObjectRegularReflectionPalette
if (IndexOfSpritePaletteTag(HIGH_BRIDGE_PAL_TAG) != reflectionSprite->oam.paletteNum)
{
u16 baseTag = GetSpritePaletteTagByPaletteNum(mainSprite->oam.paletteNum);
u16 paletteTag = REFLECTION_PAL_TAG(baseTag, mainSprite->oam.paletteNum);
u8 paletteNum = IndexOfSpritePaletteTag(paletteTag);
if (paletteNum >= 16)
{
// Build filtered palette
u16 filteredData[16];
struct SpritePalette filteredPal = {.tag = paletteTag, .data = filteredData};
// Free palette if unused
reflectionSprite->inUse = FALSE;
FieldEffectFreePaletteIfUnused(reflectionSprite->oam.paletteNum);
reflectionSprite->inUse = TRUE;
if (reflectionSprite->sIsStillReflection == FALSE)
ApplyPondFilter(mainSprite->oam.paletteNum, filteredData);
else
ApplyIceFilter(mainSprite->oam.paletteNum, filteredData);
paletteNum = LoadSpritePalette(&filteredPal);
UpdateSpritePaletteWithWeather(paletteNum);
}
reflectionSprite->oam.paletteNum = paletteNum;
}
reflectionSprite->oam.shape = mainSprite->oam.shape;
reflectionSprite->oam.size = mainSprite->oam.size;
reflectionSprite->oam.matrixNum = mainSprite->oam.matrixNum | ST_OAM_VFLIP;
reflectionSprite->oam.tileNum = mainSprite->oam.tileNum;
reflectionSprite->subspriteTables = mainSprite->subspriteTables;
reflectionSprite->invisible = mainSprite->invisible;
reflectionSprite->x = mainSprite->x;
// sReflectionVerticalOffset is only set for high bridges
reflectionSprite->y = mainSprite->y + GetReflectionVerticalOffset(objectEvent) + reflectionSprite->sReflectionVerticalOffset;
reflectionSprite->centerToCornerVecX = mainSprite->centerToCornerVecX;
reflectionSprite->centerToCornerVecY = mainSprite->centerToCornerVecY;
reflectionSprite->x2 = mainSprite->x2;
reflectionSprite->y2 = -mainSprite->y2;
reflectionSprite->coordOffsetEnabled = mainSprite->coordOffsetEnabled;
//reflection
// if(gSaveBlock1Ptr->location.mapNum == MAP_NUM(TEST_ROOM)){
// // if (MetatileBehavior_IsMirror(objectEvent->currentMetatileBehavior)){
// reflectionSprite->y2 -= 40;
// reflectionSprite->oam.matrixNum = mainSprite->oam.matrixNum;
// if (objectEvent->facingDirection == DIR_NORTH){
// }
// else if (objectEvent->facingDirection == DIR_SOUTH){
// }
// }
if (objectEvent->graphicsId == OBJ_EVENT_GFX_FISHERMAN_SOUTH){
reflectionSprite->y2 -= 16;
}
if (objectEvent->hideReflection == TRUE)
reflectionSprite->invisible = TRUE;
// Support "virtual" sprites which can't be rotated via affines
if (reflectionSprite->subspriteTables[0].subsprites)
{
reflectionSprite->oam.affineMode = ST_OAM_AFFINE_OFF;
return;
}
if (reflectionSprite->sIsStillReflection == FALSE)
{
// Sets the reflection sprite's rot/scale matrix to the correct
// water reflection matrix based on the main sprite's facing direction.
// If the sprite is facing east, then it's flipped, and its matrixNum is 1.
reflectionSprite->oam.matrixNum = (mainSprite->oam.matrixNum & ST_OAM_HFLIP) ? 1 : 0;
}
}
#undef sReflectionObjEventId
#undef sReflectionObjEventLocalId
#undef sReflectionVerticalOffset
#undef sIsStillReflection
extern const struct SpriteTemplate *const gFieldEffectObjectTemplatePointers[];
#define sPrevX data[0]
#define sPrevY data[1]
u8 CreateWarpArrowSprite(void)
{
u8 spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_ARROW], 0, 0, 82);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
// Can use either gender's palette, so try to use the one that should be loaded
sprite->oam.paletteNum = LoadPlayerObjectEventPalette(gSaveBlock2Ptr->playerGender);
sprite->oam.priority = 1;
sprite->coordOffsetEnabled = TRUE;
sprite->invisible = TRUE;
}
return spriteId;
}
void SetSpriteInvisible(u8 spriteId)
{
gSprites[spriteId].invisible = TRUE;
}
void ShowWarpArrowSprite(u8 spriteId, u8 direction, s16 x, s16 y)
{
struct Sprite *sprite = &gSprites[spriteId];
if (sprite->invisible || sprite->sPrevX != x || sprite->sPrevY != y)
{
s16 x2, y2;
SetSpritePosToMapCoords(x, y, &x2, &y2);
sprite = &gSprites[spriteId];
sprite->x = x2 + 8;
sprite->y = y2 + 8;
sprite->invisible = FALSE;
sprite->sPrevX = x;
sprite->sPrevY = y;
StartSpriteAnim(sprite, direction - 1);
}
}
#undef sPrevX
#undef sPrevY
static const u8 sShadowEffectTemplateIds[] = {
FLDEFFOBJ_SHADOW_S,
FLDEFFOBJ_SHADOW_M,
FLDEFFOBJ_SHADOW_L,
FLDEFFOBJ_SHADOW_XL
};
const u16 gShadowVerticalOffsets[] = {
4,
4,
4,
16
};
// Sprite data for FLDEFF_SHADOW
#define sLocalId data[0]
#define sMapNum data[1]
#define sMapGroup data[2]
#define sYOffset data[3]
u32 FldEff_Shadow(void)
{
u8 objectEventId;
const struct ObjectEventGraphicsInfo *graphicsInfo;
u8 spriteId;
u8 i;
for (i = 0; i < MAX_SPRITES; i++)
{
// Return early if a shadow sprite already exists
if (gSprites[i].data[0] == gFieldEffectArguments[0] && gSprites[i].callback == UpdateShadowFieldEffect)
return 0;
}
objectEventId = GetObjectEventIdByLocalIdAndMap(gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
graphicsInfo = GetObjectEventGraphicsInfo(gObjectEvents[objectEventId].graphicsId);
if (graphicsInfo->shadowSize == SHADOW_SIZE_NONE) // don't create a shadow at all
return 0;
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[sShadowEffectTemplateIds[graphicsInfo->shadowSize]], 0, 0, 0x94);
if (spriteId != MAX_SPRITES)
{
// SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(8, 12));
gSprites[spriteId].oam.objMode = 1; // BLEND
gSprites[spriteId].coordOffsetEnabled = TRUE;
gSprites[spriteId].sLocalId = gFieldEffectArguments[0];
gSprites[spriteId].sMapNum = gFieldEffectArguments[1];
gSprites[spriteId].sMapGroup = gFieldEffectArguments[2];
#if OW_LARGE_OW_SUPPORT
gSprites[spriteId].sYOffset = gShadowVerticalOffsets[graphicsInfo->shadowSize];
#else
gSprites[spriteId].sYOffset = (graphicsInfo->height >> 1) - gShadowVerticalOffsets[graphicsInfo->shadowSize];
#endif
}
return 0;
}
void UpdateShadowFieldEffect(struct Sprite *sprite)
{
u8 objectEventId;
if (TryGetObjectEventIdByLocalIdAndMap(sprite->sLocalId, sprite->sMapNum, sprite->sMapGroup, &objectEventId))
{
FieldEffectStop(sprite, FLDEFF_SHADOW);
}
else
{
struct ObjectEvent *objectEvent = &gObjectEvents[objectEventId];
struct Sprite *linkedSprite = &gSprites[objectEvent->spriteId];
sprite->oam.priority = linkedSprite->oam.priority;
sprite->x = linkedSprite->x;
#if OW_LARGE_OW_SUPPORT
// Read 'live' size from linked sprite
sprite->y = linkedSprite->y - linkedSprite->centerToCornerVecY - sprite->sYOffset;
#else
sprite->y = linkedSprite->y + sprite->sYOffset;
#endif
sprite->invisible = linkedSprite->invisible;
if (!objectEvent->active || !objectEvent->hasShadow
|| MetatileBehavior_IsPokeGrass(objectEvent->currentMetatileBehavior)
|| MetatileBehavior_IsSurfableWaterOrUnderwater(objectEvent->currentMetatileBehavior)
|| MetatileBehavior_IsSurfableWaterOrUnderwater(objectEvent->previousMetatileBehavior))
{
FieldEffectStop(sprite, FLDEFF_SHADOW);
}
}
}
#undef sLocalId
#undef sMapNum
#undef sMapGroup
#undef sYOffset
// Sprite data for FLDEFF_TALL_GRASS and FLDEFF_LONG_GRASS
#define sElevation data[0]
#define sX data[1]
#define sY data[2]
#define sMapNum data[3] // Lower 8 bits
#define sLocalId data[3] >> 8 // Upper 8 bits
#define sMapGroup data[4]
#define sCurrentMap data[5]
#define sObjectMoved data[7]
u32 FldEff_TallGrass(void)
{
u8 spriteId;
s16 x = gFieldEffectArguments[0];
s16 y = gFieldEffectArguments[1];
u16 tileBehavior;
tileBehavior = MapGridGetMetatileBehaviorAt(x, y);
SetSpritePosToOffsetMapCoords(&x, &y, 8, 8);
if (MetatileBehavior_IsTallGrassAutumn(tileBehavior))
{
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TALL_GRASS_AUTUMN], x, y, 0);
}
else
{
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TALL_GRASS], x, y, 0);
}
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = ElevationToPriority(gFieldEffectArguments[2]);
// sprite->oam.priority = gFieldEffectArguments[3];
sprite->sElevation = gFieldEffectArguments[2];
sprite->sX = gFieldEffectArguments[0];
sprite->sY = gFieldEffectArguments[1];
sprite->sMapNum = gFieldEffectArguments[4]; // Also sLocalId
sprite->sMapGroup = gFieldEffectArguments[5];
sprite->sCurrentMap = gFieldEffectArguments[6];
if (gFieldEffectArguments[7])
SeekSpriteAnim(sprite, 4); // Skip to end of anim
}
return 0;
}
void UpdateTallGrassFieldEffect(struct Sprite *sprite)
{
u8 metatileBehavior;
u8 localId;
u8 objectEventId;
u8 mapNum = sprite->sCurrentMap >> 8;
u8 mapGroup = sprite->sCurrentMap;
if (gCamera.active && (gSaveBlock1Ptr->location.mapNum != mapNum || gSaveBlock1Ptr->location.mapGroup != mapGroup))
{
sprite->sX -= gCamera.x;
sprite->sY -= gCamera.y;
sprite->sCurrentMap = ((u8)gSaveBlock1Ptr->location.mapNum << 8) | (u8)gSaveBlock1Ptr->location.mapGroup;
}
localId = sprite->sLocalId;
mapNum = sprite->sMapNum;
mapGroup = sprite->sMapGroup;
metatileBehavior = MapGridGetMetatileBehaviorAt(sprite->sX, sprite->sY);
if (TryGetObjectEventIdByLocalIdAndMap(localId, mapNum, mapGroup, &objectEventId)
|| !MetatileBehavior_IsTallGrass(metatileBehavior)
|| (sprite->sObjectMoved && sprite->animEnded))
{
FieldEffectStop(sprite, FLDEFF_TALL_GRASS);
}
else
{
// Check if the object that triggered the effect has moved away
struct ObjectEvent *objectEvent = &gObjectEvents[objectEventId];
if ((objectEvent->currentCoords.x != sprite->sX || objectEvent->currentCoords.y != sprite->sY)
&& (objectEvent->previousCoords.x != sprite->sX || objectEvent->previousCoords.y != sprite->sY))
sprite->sObjectMoved = TRUE;
// Metatile behavior var re-used as subpriority
metatileBehavior = 0;
if (sprite->animCmdIndex == 0)
metatileBehavior = 4;
UpdateObjectEventSpriteInvisibility(sprite, FALSE);
UpdateGrassFieldEffectSubpriority(sprite, sprite->sElevation, metatileBehavior);
}
}
u32 FldEff_JumpTallGrass(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 12);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_JUMP_TALL_GRASS], gFieldEffectArguments[0], gFieldEffectArguments[1], 0);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sJumpElevation = gFieldEffectArguments[2];
sprite->sJumpFldEff = FLDEFF_JUMP_TALL_GRASS;
}
return 0;
}
u8 FindTallGrassFieldEffectSpriteId(u8 localId, u8 mapNum, u8 mapGroup, s16 x, s16 y)
{
u8 i;
for (i = 0; i < MAX_SPRITES; i ++)
{
if (gSprites[i].inUse)
{
struct Sprite *sprite = &gSprites[i];
if (sprite->callback == UpdateTallGrassFieldEffect
&& (x == sprite->sX && y == sprite->sY)
&& localId == (u8)(sprite->sLocalId)
&& mapNum == (sprite->sMapNum & 0xFF)
&& mapGroup == sprite->sMapGroup)
return i;
}
}
return MAX_SPRITES;
}
u32 FldEff_LongGrass(void)
{
u8 spriteId;
s16 x = gFieldEffectArguments[0];
s16 y = gFieldEffectArguments[1];
SetSpritePosToOffsetMapCoords(&x, &y, 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_LONG_GRASS], x, y, 0);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = ElevationToPriority(gFieldEffectArguments[2]);
sprite->sElevation = gFieldEffectArguments[2];
sprite->sX = gFieldEffectArguments[0];
sprite->sY = gFieldEffectArguments[1];
sprite->sMapNum = gFieldEffectArguments[4]; // Also sLocalId
sprite->sMapGroup = gFieldEffectArguments[5];
sprite->sCurrentMap = gFieldEffectArguments[6];
if (gFieldEffectArguments[7])
SeekSpriteAnim(sprite, 6); // Skip to end of anim
}
return 0;
}
void UpdateLongGrassFieldEffect(struct Sprite *sprite)
{
u8 metatileBehavior;
u8 localId;
u8 objectEventId;
u8 mapNum = sprite->sCurrentMap >> 8;
u8 mapGroup = sprite->sCurrentMap;
if (gCamera.active && (gSaveBlock1Ptr->location.mapNum != mapNum || gSaveBlock1Ptr->location.mapGroup != mapGroup))
{
sprite->sX -= gCamera.x;
sprite->sY -= gCamera.y;
sprite->sCurrentMap = ((u8)gSaveBlock1Ptr->location.mapNum << 8) | (u8)gSaveBlock1Ptr->location.mapGroup;
}
localId = sprite->sLocalId;
mapNum = sprite->sMapNum;
mapGroup = sprite->sMapGroup;
metatileBehavior = MapGridGetMetatileBehaviorAt(sprite->sX, sprite->sY);
if (TryGetObjectEventIdByLocalIdAndMap(localId, mapNum, mapGroup, &objectEventId)
|| !MetatileBehavior_IsLongGrass(metatileBehavior)
|| (sprite->sObjectMoved && sprite->animEnded))
{
FieldEffectStop(sprite, FLDEFF_LONG_GRASS);
}
else
{
// Check if the object that triggered the effect has moved away
struct ObjectEvent *objectEvent = &gObjectEvents[objectEventId];
if ((objectEvent->currentCoords.x != sprite->sX || objectEvent->currentCoords.y != sprite->sY)
&& (objectEvent->previousCoords.x != sprite->sX || objectEvent->previousCoords.y != sprite->sY))
sprite->sObjectMoved = TRUE;
UpdateObjectEventSpriteInvisibility(sprite, FALSE);
UpdateGrassFieldEffectSubpriority(sprite, sprite->sElevation, 0);
}
}
#undef sElevation
#undef sX
#undef sY
#undef sMapNum
#undef sLocalId
#undef sMapGroup
#undef sCurrentMap
#undef sObjectMoved
// Effectively unused as it's not possible in vanilla to jump onto long grass (no adjacent ledges, and can't ride the Acro Bike in it).
// The graphics for this effect do not visually correspond to long grass either. Perhaps these graphics were its original design?
u32 FldEff_JumpLongGrass(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_JUMP_LONG_GRASS], gFieldEffectArguments[0], gFieldEffectArguments[1], 0);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sJumpElevation = gFieldEffectArguments[2];
sprite->sJumpFldEff = FLDEFF_JUMP_LONG_GRASS;
}
return 0;
}
// Sprite data for FLDEFF_SHORT_GRASS
#define sLocalId data[0]
#define sMapNum data[1]
#define sMapGroup data[2]
#define sPrevX data[3]
#define sPrevY data[4]
u32 FldEff_ShortGrass(void)
{
u8 objectEventId = GetObjectEventIdByLocalIdAndMap(gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
struct ObjectEvent *objectEvent = &gObjectEvents[objectEventId];
u8 spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_SHORT_GRASS], 0, 0, 0);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &(gSprites[spriteId]);
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gSprites[objectEvent->spriteId].oam.priority;
sprite->sLocalId = gFieldEffectArguments[0];
sprite->sMapNum = gFieldEffectArguments[1];
sprite->sMapGroup = gFieldEffectArguments[2];
sprite->sPrevX = gSprites[objectEvent->spriteId].x;
sprite->sPrevY = gSprites[objectEvent->spriteId].y;
}
return 0;
}
void UpdateShortGrassFieldEffect(struct Sprite *sprite)
{
u8 objectEventId;
if (TryGetObjectEventIdByLocalIdAndMap(sprite->sLocalId, sprite->sMapNum, sprite->sMapGroup, &objectEventId) || !gObjectEvents[objectEventId].inShortGrass)
{
FieldEffectStop(sprite, FLDEFF_SHORT_GRASS);
}
else
{
const struct ObjectEventGraphicsInfo *graphicsInfo = GetObjectEventGraphicsInfo(gObjectEvents[objectEventId].graphicsId);
struct Sprite *linkedSprite = &gSprites[gObjectEvents[objectEventId].spriteId];
s16 parentY = linkedSprite->y;
s16 parentX = linkedSprite->x;
if (parentX != sprite->sPrevX || parentY != sprite->sPrevY)
{
// Parent sprite moved, try to restart the animation
sprite->sPrevX = parentX;
sprite->sPrevY = parentY;
if (sprite->animEnded)
StartSpriteAnim(sprite, 0);
}
sprite->x = parentX;
sprite->y = parentY;
// Offset the grass sprite halfway down the parent sprite.
sprite->y2 = (graphicsInfo->height >> 1) - 8;
sprite->subpriority = linkedSprite->subpriority - 1;
sprite->oam.priority = linkedSprite->oam.priority;
UpdateObjectEventSpriteInvisibility(sprite, linkedSprite->invisible);
}
}
#undef sLocalId
#undef sMapNum
#undef sMapGroup
#undef sPrevX
#undef sPrevY
// Sprite data for FLDEFF_SAND_FOOTPRINTS, FLDEFF_DEEP_SAND_FOOTPRINTS, and FLDEFF_BIKE_TIRE_TRACKS
#define sState data[0]
#define sTimer data[1]
#define sFldEff data[7]
u32 FldEff_SandFootprints(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_SAND_FOOTPRINTS], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sFldEff = FLDEFF_SAND_FOOTPRINTS;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return 0;
}
u32 FldEff_DeepSandFootprints(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_DEEP_SAND_FOOTPRINTS], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sFldEff = FLDEFF_DEEP_SAND_FOOTPRINTS;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_TracksBug(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TRACKS_BUG], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_TRACKS_BUG;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return 0;
}
u32 FldEff_MudFootprints(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_MUD_FOOTPRINTS], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_MUD_FOOTPRINTS;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_TracksSpot(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TRACKS_SPOT], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_TRACKS_SPOT;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return 0;
}
u32 FldEff_BikeTireTracks(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_BIKE_TIRE_TRACKS], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sFldEff = FLDEFF_BIKE_TIRE_TRACKS;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_TracksSlither(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TRACKS_SLITHER], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_TRACKS_SLITHER;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_BikeTireTracksSnow(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_BIKE_TIRE_TRACKS_SNOW], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sFldEff = FLDEFF_BIKE_TIRE_TRACKS_SNOW;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_TracksSlitherSnow(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TRACKS_SLITHER_SNOW], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_TRACKS_SLITHER_SNOW;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_SnowFootprints(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_SNOW_FOOTPRINTS], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sFldEff = FLDEFF_SNOW_FOOTPRINTS;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return 0;
}
u32 FldEff_DeepSnowFootprints(void)
{
u8 spriteId;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_DEEP_SNOW_FOOTPRINTS], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->sFldEff = FLDEFF_DEEP_SNOW_FOOTPRINTS;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return spriteId;
}
u32 FldEff_TracksBugSnow(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TRACKS_BUG_SNOW], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_TRACKS_BUG_SNOW;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return 0;
}
u32 FldEff_TracksSpotSnow(void)
{
u8 spriteId;
struct Sprite *sprite;
SetSpritePosToOffsetMapCoords((s16 *)&gFieldEffectArguments[0], (s16 *)&gFieldEffectArguments[1], 8, 8);
spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_TRACKS_SPOT_SNOW], gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
if (spriteId != MAX_SPRITES)
{
sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
sprite->oam.priority = gFieldEffectArguments[3];
sprite->data[7] = FLDEFF_TRACKS_SPOT_SNOW;
StartSpriteAnim(sprite, gFieldEffectArguments[4]);
}
return 0;
}
void (*const gFadeFootprintsTireTracksFuncs[])(struct Sprite *) = {
FadeFootprintsTireTracks_Step0,
FadeFootprintsTireTracks_Step1
};
void UpdateFootprintsTireTracksFieldEffect(struct Sprite *sprite)
{
gFadeFootprintsTireTracksFuncs[sprite->sState](sprite);
}
static void FadeFootprintsTireTracks_Step0(struct Sprite *sprite)
{
// Wait 40 frames before the flickering starts.
if (++sprite->sTimer > 40)
sprite->sState = 1;
UpdateObjectEventSpriteInvisibility(sprite, FALSE);
}
static void FadeFootprintsTireTracks_Step1(struct Sprite *sprite)
{
sprite->invisible ^= 1;
sprite->sTimer++;
UpdateObjectEventSpriteInvisibility(sprite, sprite->invisible);
if (sprite->sTimer > 56)
FieldEffectStop(sprite, sprite->sFldEff);
}
#undef sState
#undef sTimer
#undef sFldEff
// Sprite data for FLDEFF_SPLASH
#define sLocalId data[0]
#define sMapNum data[1]
#define sMapGroup data[2]
u32 FldEff_Splash(void)
{
u8 objectEventId = GetObjectEventIdByLocalIdAndMap(gFieldEffectArguments[0], gFieldEffectArguments[1], gFieldEffectArguments[2]);
struct ObjectEvent *objectEvent = &gObjectEvents[objectEventId];
u8 spriteId = CreateSpriteAtEnd(gFieldEffectObjectTemplatePointers[FLDEFFOBJ_SPLASH], 0, 0, 0);
if (objectEvent->graphicsId == OBJ_EVENT_GFX_GASTLY
|| objectEvent->graphicsId == OBJ_EVENT_GFX_HAUNTER
|| objectEvent->graphicsId == OBJ_EVENT_GFX_MISDREAVUS
|| objectEvent->graphicsId == OBJ_EVENT_GFX_MISMAGIUS
|| objectEvent->graphicsId == OBJ_EVENT_GFX_PHANTUMP
|| objectEvent->graphicsId == OBJ_EVENT_GFX_SHUPPET){
return 0;
}
if (spriteId != MAX_SPRITES)
{
struct Sprite *linkedSprite;
const struct ObjectEventGraphicsInfo *graphicsInfo = GetObjectEventGraphicsInfo(objectEvent->graphicsId);
struct Sprite *sprite = &gSprites[spriteId];
sprite->coordOffsetEnabled = TRUE;
linkedSprite = &gSprites[objectEvent->spriteId];
sprite->oam.priority = linkedSprite->oam.priority;
sprite->sLocalId = gFieldEffectArguments[0];
sprite->sMapNum = gFieldEffectArguments[1];
sprite->sMapGroup = gFieldEffectArguments[2];