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

#include "../../Platform/stdafx.h"
#include "../../Headers/net.minecraft.world.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "../../Headers/net.minecraft.world.item.h"
#include "../../Headers/net.minecraft.world.entity.ai.attributes.h"
#include "../../Headers/net.minecraft.world.entity.item.h"
#include "../../Headers/net.minecraft.world.entity.player.h"
#include "../../Headers/net.minecraft.world.effect.h"
#include "../../Headers/net.minecraft.world.entity.h"
#include "../../Headers/net.minecraft.world.entity.monster.h"
#include "../../Headers/com.mojang.nbt.h"
#include "../../Util/BasicTypeContainers.h"
#include "Spider.h"
#include "../../../Minecraft.Client/Textures/Textures.h"
#include "../../Util/SoundTypes.h"

Spider::Spider(Level* level) : Monster(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());

    this->setSize(1.4f, 0.9f);
}

void Spider::defineSynchedData() {
    Monster::defineSynchedData();

    entityData->define(DATA_FLAGS_ID, (uint8_t)0);
}

void Spider::tick() {
    Monster::tick();

    if (!level->isClientSide) {
        // this is to synchronize the spiders' climb state
        // in multiplayer (to stop them from "flashing")
        setClimbing(horizontalCollision);
    }
}

void Spider::registerAttributes() {
    Monster::registerAttributes();

    getAttribute(SharedMonsterAttributes::MAX_HEALTH)->setBaseValue(16);
    getAttribute(SharedMonsterAttributes::MOVEMENT_SPEED)->setBaseValue(0.8f);
}

std::shared_ptr<Entity> Spider::findAttackTarget() {
#ifndef _FINAL_BUILD
#ifdef _DEBUG_MENUS_ENABLED
    if (app.GetMobsDontAttackEnabled()) {
        return std::shared_ptr<Player>();
    }
#endif
#endif

    float br = getBrightness(1);
    if (br < 0.5f) {
        double maxDist = 16;
        return level->getNearestAttackablePlayer(shared_from_this(), maxDist);
    }
    return std::shared_ptr<Entity>();
}

int Spider::getAmbientSound() { return eSoundType_MOB_SPIDER_AMBIENT; }

int Spider::getHurtSound() { return eSoundType_MOB_SPIDER_AMBIENT; }

int Spider::getDeathSound() { return eSoundType_MOB_SPIDER_DEATH; }

void Spider::playStepSound(int xt, int yt, int zt, int t) {
    playSound(eSoundType_MOB_SPIDER_STEP, 0.15f, 1);
}

void Spider::checkHurtTarget(std::shared_ptr<Entity> target, float d) {
    float br = getBrightness(1);
    if (br > 0.5f && random->nextInt(100) == 0) {
        attackTarget = nullptr;
        return;
    }

    if (d > 2 && d < 6 && random->nextInt(10) == 0) {
        if (onGround) {
            double xdd = target->x - x;
            double zdd = target->z - z;
            float dd = (float)sqrt(xdd * xdd + zdd * zdd);
            xd = (xdd / dd * 0.5f) * 0.8f + xd * 0.2f;
            zd = (zdd / dd * 0.5f) * 0.8f + zd * 0.2f;
            yd = 0.4f;
        }
    } else {
        Monster::checkHurtTarget(target, d);
    }
}

int Spider::getDeathLoot() { return Item::string->id; }

void Spider::dropDeathLoot(bool wasKilledByPlayer, int playerBonusLevel) {
    Monster::dropDeathLoot(wasKilledByPlayer, playerBonusLevel);

    if (wasKilledByPlayer && (random->nextInt(3) == 0 ||
                              random->nextInt(1 + playerBonusLevel) > 0)) {
        spawnAtLocation(Item::spiderEye_Id, 1);
    }
}

/**
 * The the spiders act as if they're always on a ladder, which enables them
 * to climb walls.
 */

bool Spider::onLadder() { return isClimbing(); }

void Spider::makeStuckInWeb() {
    // do nothing - spiders don't get stuck in web
}

MobType Spider::getMobType() { return ARTHROPOD; }

bool Spider::canBeAffected(MobEffectInstance* newEffect) {
    if (newEffect->getId() == MobEffect::poison->id) {
        return false;
    }
    return Monster::canBeAffected(newEffect);
}

bool Spider::isClimbing() {
    return (entityData->getByte(DATA_FLAGS_ID) & 0x1) != 0;
}

void Spider::setClimbing(bool value) {
    uint8_t flags = entityData->getByte(DATA_FLAGS_ID);
    if (value) {
        flags |= 0x1;
    } else {
        flags &= ~0x1;
    }
    entityData->set(DATA_FLAGS_ID, flags);
}

MobGroupData* Spider::finalizeMobSpawn(
    MobGroupData* groupData, int extraData /*= 0*/)  // 4J Added extraData param
{
    groupData = Monster::finalizeMobSpawn(groupData);

#ifndef _CONTENT_PACKAGE
    // 4J-JEV: Added for spider-jockey spawn-egg.
    if ((level->random->nextInt(100) == 0) || (extraData != 0))
#else
    if (level->random->nextInt(100) == 0)
#endif
    {
        std::shared_ptr<Skeleton> skeleton =
            std::shared_ptr<Skeleton>(new Skeleton(level));
        skeleton->moveTo(x, y, z, yRot, 0);
        skeleton->finalizeMobSpawn(NULL);
        level->addEntity(skeleton);
        skeleton->ride(shared_from_this());
    }

    if (groupData == NULL) {
        groupData = new SpiderEffectsGroupData();

        if (level->difficulty > Difficulty::NORMAL &&
            level->random->nextFloat() <
                SPIDER_SPECIAL_EFFECT_CHANCE * level->getDifficulty(x, y, z)) {
            ((SpiderEffectsGroupData*)groupData)
                ->setRandomEffect(level->random);
        }
    }
    if (dynamic_cast<SpiderEffectsGroupData*>(groupData) != NULL) {
        int effect = ((SpiderEffectsGroupData*)groupData)->effectId;
        if (effect > 0 && MobEffect::effects[effect] != NULL) {
            addEffect(new MobEffectInstance(effect, Integer::MAX_VALUE));
        }
    }

    return groupData;
}

const float Spider::SPIDER_SPECIAL_EFFECT_CHANCE = .1f;

Spider::SpiderEffectsGroupData::SpiderEffectsGroupData() { effectId = 0; }

void Spider::SpiderEffectsGroupData::setRandomEffect(Random* random) {
    int selection = random->nextInt(5);
    if (selection <= 1) {
        effectId = MobEffect::movementSpeed->id;
    } else if (selection <= 2) {
        effectId = MobEffect::damageBoost->id;
    } else if (selection <= 3) {
        effectId = MobEffect::regeneration->id;
    } else if (selection <= 4) {
        effectId = MobEffect::invisibility->id;
    }
}