4jcraft/Minecraft.World/Entities/ItemEntity.cpp
2026-03-21 16:29:02 -05:00

293 lines
9.2 KiB
C++

#include "../Platform/stdafx.h"
#include "../Util/JavaMath.h"
#include "../Headers/net.minecraft.stats.h"
#include "../Headers/net.minecraft.world.entity.h"
#include "../Headers/net.minecraft.world.level.h"
#include "../Headers/net.minecraft.world.level.tile.h"
#include "../Headers/net.minecraft.world.phys.h"
#include "../Headers/net.minecraft.world.item.h"
#include "../Headers/net.minecraft.world.entity.player.h"
#include "../Headers/net.minecraft.world.level.material.h"
#include "../Headers/net.minecraft.world.damagesource.h"
#include "../Headers/com.mojang.nbt.h"
#include "ItemEntity.h"
#include "../Util/SoundTypes.h"
void ItemEntity::_init() {
age = 0;
throwTime = 0;
health = 5;
bobOffs = (float)(Math::random() * PI * 2);
// 4J Stu - This function call had to be moved here from the Entity ctor to
// ensure that the derived version of the function is called
this->defineSynchedData();
setSize(0.25f, 0.25f);
heightOffset = bbHeight / 2.0f;
}
void ItemEntity::_init(Level* level, double x, double y, double z) {
_init();
setPos(x, y, z);
yRot = (float)(Math::random() * 360);
xd = (float)(Math::random() * 0.2f - 0.1f);
yd = +0.2f;
zd = (float)(Math::random() * 0.2f - 0.1f);
}
ItemEntity::ItemEntity(Level* level, double x, double y, double z)
: Entity(level) {
_init(level, x, y, z);
}
ItemEntity::ItemEntity(Level* level, double x, double y, double z,
std::shared_ptr<ItemInstance> item)
: Entity(level) {
_init(level, x, y, z);
setItem(item);
}
bool ItemEntity::makeStepSound() { return false; }
ItemEntity::ItemEntity(Level* level) : Entity(level) { _init(); }
void ItemEntity::defineSynchedData() {
getEntityData()->defineNULL(DATA_ITEM, NULL);
}
void ItemEntity::tick() {
Entity::tick();
if (throwTime > 0) throwTime--;
xo = x;
yo = y;
zo = z;
yd -= 0.04f;
noPhysics = checkInTile(x, (bb->y0 + bb->y1) / 2, z);
// 4J - added parameter here so that these don't care about colliding with
// other entities
move(xd, yd, zd, true);
bool moved = (int)xo != (int)x || (int)yo != (int)y || (int)zo != (int)z;
if (moved || tickCount % 25 == 0) {
if (level->getMaterial(Mth::floor(x), Mth::floor(y), Mth::floor(z)) ==
Material::lava) {
yd = 0.2f;
xd = (random->nextFloat() - random->nextFloat()) * 0.2f;
zd = (random->nextFloat() - random->nextFloat()) * 0.2f;
MemSect(31);
playSound(eSoundType_RANDOM_FIZZ, 0.4f,
2.0f + random->nextFloat() * 0.4f);
MemSect(0);
}
if (!level->isClientSide) {
mergeWithNeighbours();
}
}
float friction = 0.98f;
if (onGround) {
friction = 0.6f * 0.98f;
int t = level->getTile(Mth::floor(x), Mth::floor(bb->y0) - 1,
Mth::floor(z));
if (t > 0) {
friction = Tile::tiles[t]->friction * 0.98f;
}
}
xd *= friction;
yd *= 0.98f;
zd *= friction;
if (onGround) {
yd *= -0.5f;
}
tickCount++;
age++;
if (!level->isClientSide && age >= LIFETIME) {
remove();
}
}
void ItemEntity::mergeWithNeighbours() {
std::vector<std::shared_ptr<Entity> >* neighbours =
level->getEntitiesOfClass(typeid(*this), bb->grow(0.5, 0, 0.5));
for (AUTO_VAR(it, neighbours->begin()); it != neighbours->end(); ++it) {
std::shared_ptr<ItemEntity> entity =
std::dynamic_pointer_cast<ItemEntity>(*it);
merge(entity);
}
delete neighbours;
}
bool ItemEntity::merge(std::shared_ptr<ItemEntity> target) {
if (target == shared_from_this()) return false;
if (!target->isAlive() || !this->isAlive()) return false;
std::shared_ptr<ItemInstance> myItem = this->getItem();
std::shared_ptr<ItemInstance> targetItem = target->getItem();
if (targetItem->getItem() != myItem->getItem()) return false;
if (targetItem->hasTag() ^ myItem->hasTag()) return false;
if (targetItem->hasTag() && !targetItem->getTag()->equals(myItem->getTag()))
return false;
if (targetItem->getItem()->isStackedByData() &&
targetItem->getAuxValue() != myItem->getAuxValue())
return false;
if (targetItem->count < myItem->count)
return target->merge(
std::dynamic_pointer_cast<ItemEntity>(shared_from_this()));
if (targetItem->count + myItem->count > targetItem->getMaxStackSize())
return false;
targetItem->count += myItem->count;
target->throwTime = std::max(target->throwTime, this->throwTime);
target->age = std::min(target->age, this->age);
target->setItem(targetItem);
remove();
return true;
}
void ItemEntity::setShortLifeTime() {
// reduce lifetime to one minute
age = LIFETIME - (60 * SharedConstants::TICKS_PER_SECOND);
}
bool ItemEntity::updateInWaterState() {
return level->checkAndHandleWater(bb, Material::water, shared_from_this());
}
void ItemEntity::burn(int dmg) { hurt(DamageSource::inFire, dmg); }
bool ItemEntity::hurt(DamageSource* source, float damage) {
// 4J - added next line: found whilst debugging an issue with item entities
// getting into a bad state when being created by a cactus, since entities
// insides cactuses get hurt and therefore depending on the timing of things
// they could get removed from the client when they weren't supposed to be.
// Are there really any cases were we would want an itemEntity to be locally
// hurt?
if (level->isClientSide) return false;
if (isInvulnerable()) return false;
if (getItem() != NULL && getItem()->id == Item::netherStar_Id &&
source->isExplosion())
return false;
markHurt();
health -= damage;
if (health <= 0) {
remove();
}
return false;
}
void ItemEntity::addAdditonalSaveData(CompoundTag* entityTag) {
entityTag->putShort(L"Health", (uint8_t)health);
entityTag->putShort(L"Age", (short)age);
if (getItem() != NULL)
entityTag->putCompound(L"Item", getItem()->save(new CompoundTag()));
}
void ItemEntity::readAdditionalSaveData(CompoundTag* tag) {
health = tag->getShort(L"Health") & 0xff;
age = tag->getShort(L"Age");
CompoundTag* itemTag = tag->getCompound(L"Item");
setItem(ItemInstance::fromTag(itemTag));
if (getItem() == NULL) remove();
}
void ItemEntity::playerTouch(std::shared_ptr<Player> player) {
if (level->isClientSide) return;
std::shared_ptr<ItemInstance> item = getItem();
// 4J Stu - Fix for duplication glitch
if (item->count <= 0) {
remove();
return;
}
int orgCount = item->count;
if (throwTime == 0 && player->inventory->add(item)) {
// if (item.id == Tile.treeTrunk.id)
// player.awardStat(Achievements.mineWood); if (item.id ==
// Item.leather.id) player.awardStat(Achievements.killCow); if (item.id
// == Item.diamond.id) player.awardStat(Achievements.diamonds); if
// (item.id == Item.blazeRod.id)
// player.awardStat(Achievements.blazeRod);
if (item->id == Item::diamond_Id) {
player->awardStat(GenericStats::diamonds(),
GenericStats::param_diamonds());
#ifdef _EXTENDED_ACHIEVEMENTS
if (getItem()->getItem()->id) {
std::shared_ptr<Player> pThrower =
level->getPlayerByName(getThrower());
if ((pThrower != nullptr) && (pThrower != player)) {
pThrower->awardStat(GenericStats::diamondsToYou(),
GenericStats::param_diamondsToYou());
}
}
#endif
}
if (item->id == Item::blazeRod_Id)
player->awardStat(GenericStats::blazeRod(),
GenericStats::param_blazeRod());
playSound(
eSoundType_RANDOM_POP, 0.2f,
((random->nextFloat() - random->nextFloat()) * 0.7f + 1.0f) * 2.0f);
player->take(shared_from_this(), orgCount);
// System.out.println(item.count + ", " + orgCount);
if (item->count <= 0) remove();
}
}
std::wstring ItemEntity::getAName() {
return L""; // L"item." + getItem()->getDescriptionId();
// return I18n.get("item." + item.getDescriptionId());
}
void ItemEntity::changeDimension(int i) {
Entity::changeDimension(i);
if (!level->isClientSide) mergeWithNeighbours();
}
std::shared_ptr<ItemInstance> ItemEntity::getItem() {
std::shared_ptr<ItemInstance> result =
getEntityData()->getItemInstance(DATA_ITEM);
if (result == NULL) {
if (level != NULL) {
app.DebugPrintf("Item entity %d has no item?!\n", entityId);
// level.getLogger().severe("Item entity " + entityId + " has no
// item?!");
}
return std::shared_ptr<ItemInstance>(new ItemInstance(Tile::stone));
}
return result;
}
void ItemEntity::setItem(std::shared_ptr<ItemInstance> item) {
getEntityData()->set(DATA_ITEM, item);
getEntityData()->markDirty(DATA_ITEM);
}
bool ItemEntity::isAttackable() { return false; }
void ItemEntity::setThrower(const std::wstring& thrower) {
this->thrower = thrower;
}
std::wstring ItemEntity::getThrower() { return this->thrower; }