4jcraft/Minecraft.World/Entities/Mobs/Bat.cpp

#include "../../Platform/stdafx.h"
#include "../../Headers/net.minecraft.world.entity.h"
#include "../../Headers/net.minecraft.world.entity.ai.attributes.h"
#include "../../Headers/net.minecraft.world.entity.monster.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "../../Headers/net.minecraft.world.level.tile.h"
#include "../../Headers/net.minecraft.world.phys.h"
#include "Bat.h"

Bat::Bat(Level* level) : AmbientCreature(level) {
    // 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();
    registerAttributes();
    setHealth(getMaxHealth());

    targetPosition = nullptr;

    setSize(.5f, .9f);
    setResting(true);
}

void Bat::defineSynchedData() {
    AmbientCreature::defineSynchedData();

    entityData->define(DATA_ID_FLAGS, (char)0);
}

float Bat::getSoundVolume() { return 0.1f; }

float Bat::getVoicePitch() { return AmbientCreature::getVoicePitch() * .95f; }

int Bat::getAmbientSound() {
    if (isResting() && random->nextInt(4) != 0) {
        return -1;
    }
    return eSoundType_MOB_BAT_IDLE;  //"mob.bat.idle";
}

int Bat::getHurtSound() {
    return eSoundType_MOB_BAT_HURT;  //"mob.bat.hurt";
}

int Bat::getDeathSound() {
    return eSoundType_MOB_BAT_DEATH;  //"mob.bat.death";
}

bool Bat::isPushable() {
    // bats can't be pushed by other mobs
    return false;
}

void Bat::doPush(std::shared_ptr<Entity> e) {
    // bats don't push other mobs
}

void Bat::pushEntities() {
    // bats don't push other mobs
}

void Bat::registerAttributes() {
    AmbientCreature::registerAttributes();

    getAttribute(SharedMonsterAttributes::MAX_HEALTH)->setBaseValue(6);
}

bool Bat::isResting() {
    return (entityData->getByte(DATA_ID_FLAGS) & FLAG_RESTING) != 0;
}

void Bat::setResting(bool value) {
    char current = entityData->getByte(DATA_ID_FLAGS);
    if (value) {
        entityData->set(DATA_ID_FLAGS, (char)(current | FLAG_RESTING));
    } else {
        entityData->set(DATA_ID_FLAGS, (char)(current & ~FLAG_RESTING));
    }
}

bool Bat::useNewAi() { return true; }

void Bat::tick() {
    AmbientCreature::tick();

    if (isResting()) {
        xd = yd = zd = 0;
        y = Mth::floor(y) + 1.0 - bbHeight;
    } else {
        yd *= .6f;
    }
}

inline int signum(double x) { return (x > 0) - (x < 0); }

void Bat::newServerAiStep() {
    AmbientCreature::newServerAiStep();

    if (isResting()) {
        if (!level->isSolidBlockingTile(Mth::floor(x), (int)y + 1,
                                        Mth::floor(z))) {
            setResting(false);
            level->levelEvent(nullptr, LevelEvent::SOUND_BAT_LIFTOFF, (int)x,
                              (int)y, (int)z, 0);
        } else {
            if (random->nextInt(200) == 0) {
                yHeadRot = random->nextInt(360);
            }

            if (level->getNearestPlayer(shared_from_this(), 4.0f) != nullptr) {
                setResting(false);
                level->levelEvent(nullptr, LevelEvent::SOUND_BAT_LIFTOFF,
                                  (int)x, (int)y, (int)z, 0);
            }
        }
    } else {
        if (targetPosition != nullptr &&
            (!level->isEmptyTile(targetPosition->x, targetPosition->y,
                                 targetPosition->z) ||
             targetPosition->y < 1)) {
            delete targetPosition;
            targetPosition = nullptr;
        }
        if (targetPosition == nullptr || random->nextInt(30) == 0 ||
            targetPosition->distSqr((int)x, (int)y, (int)z) < 4) {
            delete targetPosition;
            targetPosition =
                new Pos((int)x + random->nextInt(7) - random->nextInt(7),
                        (int)y + random->nextInt(6) - 2,
                        (int)z + random->nextInt(7) - random->nextInt(7));
        }

        double dx = (targetPosition->x + .5) - x;
        double dy = (targetPosition->y + .1) - y;
        double dz = (targetPosition->z + .5) - z;

        xd = xd + (signum(dx) * .5f - xd) * .1f;
        yd = yd + (signum(dy) * .7f - yd) * .1f;
        zd = zd + (signum(dz) * .5f - zd) * .1f;

        float yRotD = (float)(atan2(zd, xd) * 180 / PI) - 90;
        float rotDiff = Mth::wrapDegrees(yRotD - yRot);
        yya = .5f;
        yRot += rotDiff;

        if (random->nextInt(100) == 0 &&
            level->isSolidBlockingTile(Mth::floor(x), (int)y + 1,
                                       Mth::floor(z))) {
            setResting(true);
        }
    }
}

bool Bat::makeStepSound() { return false; }

void Bat::causeFallDamage(float distance) {}

void Bat::checkFallDamage(double ya, bool onGround) {
    // this method is empty because flying creatures should
    // not trigger the "fallOn" tile calls (such as trampling crops)
}

bool Bat::isIgnoringTileTriggers() { return true; }

bool Bat::hurt(DamageSource* source, float dmg) {
    if (isInvulnerable()) return false;
    if (!level->isClientSide) {
        if (isResting()) {
            setResting(false);
        }
    }

    return AmbientCreature::hurt(source, dmg);
}

void Bat::readAdditionalSaveData(CompoundTag* tag) {
    AmbientCreature::readAdditionalSaveData(tag);

    entityData->set(DATA_ID_FLAGS, tag->getByte(L"BatFlags"));
}

void Bat::addAdditonalSaveData(CompoundTag* entityTag) {
    AmbientCreature::addAdditonalSaveData(entityTag);

    entityTag->putByte(L"BatFlags", entityData->getByte(DATA_ID_FLAGS));
}

bool Bat::canSpawn() {
    int yt = Mth::floor(bb.y0);
    if (yt >= level->seaLevel) return false;

    int xt = Mth::floor(x);
    int zt = Mth::floor(z);

    int br = level->getRawBrightness(xt, yt, zt);
    int maxLight = 4;

    if ((Calendar::GetDayOfMonth() + 1 == 10 &&
         Calendar::GetDayOfMonth() >= 20) ||
        (Calendar::GetMonth() + 1 == 11 && Calendar::GetMonth() <= 3)) {
        maxLight = 7;
    } else if (random->nextBoolean()) {
        return false;
    }

    if (br > random->nextInt(maxLight)) return false;

    return AmbientCreature::canSpawn();
}