4jcraft/Minecraft.World/Entities/Monster.cpp

#include "../Platform/stdafx.h"
#include "../Headers/net.minecraft.world.h"
#include "../Headers/net.minecraft.world.phys.h"
#include "../Headers/net.minecraft.world.level.h"
#include "../Headers/net.minecraft.world.entity.player.h"
#include "../Headers/net.minecraft.world.damagesource.h"
#include "../Headers/net.minecraft.world.effect.h"
#include "../Headers/net.minecraft.world.item.enchantment.h"
#include "Monster.h"
#include "../../Minecraft.Client/Minecraft.h"

void Monster::_init() { attackDamage = 2; }

Monster::Monster(Level* level) : PathfinderMob(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

    // 4J Stu - Only the most derived classes should call this
    // this->defineSynchedData();

    _init();

    xpReward = Enemy::XP_REWARD_MEDIUM;
}

void Monster::aiStep() {
    float br = getBrightness(1);
    if (br > 0.5f) {
        noActionTime += 2;
    }

    PathfinderMob::aiStep();
}

void Monster::tick() {
    PathfinderMob::tick();
    if (!level->isClientSide && (level->difficulty == Difficulty::PEACEFUL ||
                                 Minecraft::GetInstance()->isTutorial()))
        remove();
}

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

    std::shared_ptr<Player> player =
        level->getNearestAttackablePlayer(shared_from_this(), 16);
    if (player != NULL && canSee(player)) return player;
    return std::shared_ptr<Player>();
}

bool Monster::hurt(DamageSource* source, int dmg) {
    if (PathfinderMob::hurt(source, dmg)) {
        std::shared_ptr<Entity> sourceEntity = source->getEntity();
        if (rider.lock() == sourceEntity || riding == sourceEntity) return true;

        if (sourceEntity != shared_from_this()) {
            this->attackTarget = sourceEntity;
        }
        return true;
    }
    return false;
}

/**
 * Performs hurt action, returns if successful
 *
 * @param target
 * @return
 */
bool Monster::doHurtTarget(std::shared_ptr<Entity> target) {
    int dmg = attackDamage;
    if (hasEffect(MobEffect::damageBoost)) {
        dmg += (3 << getEffect(MobEffect::damageBoost)->getAmplifier());
    }
    if (hasEffect(MobEffect::weakness)) {
        dmg -= (2 << getEffect(MobEffect::weakness)->getAmplifier());
    }

    DamageSource* damageSource = DamageSource::mobAttack(
        std::dynamic_pointer_cast<Mob>(shared_from_this()));
    bool didHurt = target->hurt(damageSource, dmg);
    delete damageSource;

    if (didHurt) {
        int fireAspect = EnchantmentHelper::getFireAspect(
            std::dynamic_pointer_cast<Mob>(shared_from_this()));
        if (fireAspect > 0) {
            target->setOnFire(fireAspect * 4);
        }

        std::shared_ptr<Mob> mob = std::dynamic_pointer_cast<Mob>(target);
        if (mob != NULL) {
            ThornsEnchantment::doThornsAfterAttack(shared_from_this(), mob,
                                                   random);
        }
    }

    return didHurt;
}

void Monster::checkHurtTarget(std::shared_ptr<Entity> target, float distance) {
    if (attackTime <= 0 && distance < 2.0f && target->bb->y1 > bb->y0 &&
        target->bb->y0 < bb->y1) {
        attackTime = 20;
        doHurtTarget(target);
    }
}

float Monster::getWalkTargetValue(int x, int y, int z) {
    return 0.5f - level->getBrightness(x, y, z);
}

bool Monster::isDarkEnoughToSpawn() {
    int xt = Mth::floor(x);
    int yt = Mth::floor(bb->y0);
    int zt = Mth::floor(z);
    if (level->getBrightness(LightLayer::Sky, xt, yt, zt) > random->nextInt(32))
        return false;

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

    if (level->isThundering()) {
        int tmp = level->skyDarken;
        level->skyDarken = 10;
        br = level->getRawBrightness(xt, yt, zt);
        level->skyDarken = tmp;
    }

    return br <= random->nextInt(8);
}

bool Monster::canSpawn() {
    // 4J Stu
    // Fix for #8265 - AI: Monsters will flash briefly on the screen around
    // Monster Spawners when the game settings are set to Peaceful.
    return isDarkEnoughToSpawn() && PathfinderMob::canSpawn() &&
           level->difficulty > Difficulty::PEACEFUL;
}