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

#include "../../Platform/stdafx.h"
#include "../../Headers/com.mojang.nbt.h"
#include "../../Headers/net.minecraft.world.entity.h"
#include "../../Headers/net.minecraft.world.entity.player.h"
#include "../../Headers/net.minecraft.world.item.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "../../Headers/net.minecraft.world.level.material.h"
#include "../../Headers/net.minecraft.world.level.tile.h"
#include "../../Headers/net.minecraft.world.phys.h"
#include "../../Headers/net.minecraft.world.damagesource.h"
#include "Boat.h"

const double Boat::MAX_SPEED = 0.35;
const double Boat::MAX_COLLISION_SPEED = MAX_SPEED * 0.75;
const double Boat::MIN_ACCELERATION = 0.07;
const double Boat::MAX_ACCELERATION = 0.35;

// 4J - added for common ctor code
void Boat::_init() {
    doLerp = true;
    acceleration = MIN_ACCELERATION;

    lSteps = 0;
    lx = ly = lz = lyr = lxr = 0.0;
    lxd = lyd = lzd = 0.0;

    blocksBuilding = true;
    setSize(1.5f, 0.6f);
    heightOffset = bbHeight / 2.0f;

    // 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();
}

Boat::Boat(Level* level) : Entity(level) { _init(); }

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

void Boat::defineSynchedData() {
    entityData->define(DATA_ID_HURT, 0);
    entityData->define(DATA_ID_HURTDIR, 1);
    entityData->define(DATA_ID_DAMAGE, 0.0f);
}

AABB* Boat::getCollideAgainstBox(std::shared_ptr<Entity> entity) {
    return &entity->bb;
}

AABB* Boat::getCollideBox() { return &bb; }

bool Boat::isPushable() { return true; }

Boat::Boat(Level* level, double x, double y, double z) : Entity(level) {
    _init();
    setPos(x, y + heightOffset, z);

    xd = 0;
    yd = 0;
    zd = 0;

    xo = x;
    yo = y;
    zo = z;
}

double Boat::getRideHeight() { return bbHeight * 0.0f - 0.3f; }

bool Boat::hurt(DamageSource* source, float hurtDamage) {
    if (isInvulnerable()) return false;
    if (level->isClientSide || removed) return true;

    // 4J-JEV: Fix for #88212,
    // Untrusted players shouldn't be able to damage minecarts or boats.
    if (dynamic_cast<EntityDamageSource*>(source) != nullptr) {
        std::shared_ptr<Entity> attacker = source->getDirectEntity();

        if (attacker->instanceof(eTYPE_PLAYER) &&
            !std::dynamic_pointer_cast<Player>(attacker)->isAllowedToHurtEntity(
                shared_from_this())) {
            return false;
        }
    }

    setHurtDir(-getHurtDir());
    setHurtTime(10);

    // 4J Stu - If someone is riding in this, then it can tick multiple times
    // which causes the damage to decrease too quickly. So just make the damage
    // a bit higher to start with for similar behaviour to an unridden one. Only
    // do this change if the riding player is attacking it.
    if (rider.lock() != nullptr && rider.lock() == source->getEntity())
        hurtDamage += 1;

    setDamage(getDamage() + hurtDamage * 10);
    markHurt();

    // 4J Stu - Brought froward from 12w36 to fix #46611 - TU5: Gameplay:
    // Minecarts and boat requires more hits than one to be destroyed in
    // creative mode 4J-PB - Fix for XB1 #175735 - [CRASH] [Multi-Plat]: Code:
    // Gameplay: Placing a boat on harmful surfaces causes the game to crash
    bool creativePlayer = (source->getEntity() != nullptr) &&
                          source->getEntity()->instanceof(eTYPE_PLAYER) &&
                          std::dynamic_pointer_cast<Player>(source->getEntity())
                              ->abilities.instabuild;

    if (creativePlayer || getDamage() > 20 * 2) {
        if (rider.lock() != nullptr) rider.lock()->ride(shared_from_this());
        if (!creativePlayer) spawnAtLocation(Item::boat_Id, 1, 0);
        remove();
    }
    return true;
}

void Boat::animateHurt() {
    setHurtDir(-getHurtDir());
    setHurtTime(10);
    setDamage(getDamage() * 11);
}

bool Boat::isPickable() { return !removed; }

void Boat::lerpTo(double x, double y, double z, float yRot, float xRot,
                  int steps) {
    if (doLerp) {
        lSteps = steps + 5;
    } else {
        double xdiff = x - this->x;
        double ydiff = y - this->y;
        double zdiff = z - this->z;
        double diff = xdiff * xdiff + ydiff * ydiff + zdiff * zdiff;

        if (diff > 1) {
            lSteps = 3;
        } else {
            return;
        }
    }

    lx = x;
    ly = y;
    lz = z;
    lyr = yRot;
    lxr = xRot;

    xd = lxd;
    yd = lyd;
    zd = lzd;
}

void Boat::lerpMotion(double xd, double yd, double zd) {
    lxd = this->xd = xd;
    lyd = this->yd = yd;
    lzd = this->zd = zd;
}

void Boat::tick() {
    Entity::tick();
    if (getHurtTime() > 0) setHurtTime(getHurtTime() - 1);
    if (getDamage() > 0) setDamage(getDamage() - 1);
    xo = x;
    yo = y;
    zo = z;

    int steps = 5;
    double waterPercentage = 0;
    for (int i = 0; i < steps; i++) {
        double y0 = bb.y0 + (bb.y1 - bb.y0) * (i + 0) / steps - 2 / 16.0f;
        double y1 = bb.y0 + (bb.y1 - bb.y0) * (i + 1) / steps - 2 / 16.0f;
        AABB bb2(bb.x0, y0, bb.z0, bb.x1, y1, bb.z1);
        if (level->containsLiquid(&bb2, Material::water)) {
            waterPercentage += 1.0 / steps;
        }
    }

    double lastSpeed = sqrt(xd * xd + zd * zd);
    if (lastSpeed > MAX_COLLISION_SPEED) {
        double xa = cos(yRot * PI / 180);
        double za = sin(yRot * PI / 180);

        for (int i = 0; i < 1 + lastSpeed * 60; i++) {
            double side = (random->nextFloat() * 2 - 1);

            double side2 = (random->nextInt(2) * 2 - 1) * 0.7;
            if (random->nextBoolean()) {
                double xx = x - xa * side * 0.8 + za * side2;
                double zz = z - za * side * 0.8 - xa * side2;
                level->addParticle(eParticleType_splash, xx, y - 2 / 16.0f, zz,
                                   +xd, yd, +zd);
            } else {
                double xx = x + xa + za * side * 0.7;
                double zz = z + za - xa * side * 0.7;
                level->addParticle(eParticleType_splash, xx, y - 2 / 16.0f, zz,
                                   +xd, yd, +zd);
            }
        }
    }

    if (level->isClientSide && doLerp) {
        if (lSteps > 0) {
            double xt = x + (lx - x) / lSteps;
            double yt = y + (ly - y) / lSteps;
            double zt = z + (lz - z) / lSteps;

            double yrd = Mth::wrapDegrees(lyr - yRot);

            yRot += (float)((yrd) / lSteps);
            xRot += (float)((lxr - xRot) / lSteps);

            lSteps--;
            setPos(xt, yt, zt);
            setRot(yRot, xRot);
        } else {
            // Original
            // double xt = x + xd;
            // double yt = y + yd;
            // double zt = z + zd;
            // this->setPos(xt, yt, zt);

            // 4J Stu - Fix for various boat bugs, ensure that we check
            // collision on client-side movement
            move(xd, yd, zd);

            if (onGround) {
                xd *= 0.5f;
                yd *= 0.5f;
                zd *= 0.5f;
            }
            xd *= 0.99f;
            yd *= 0.95f;
            zd *= 0.99f;
        }
        return;
    }

    if (waterPercentage < 1) {
        double bob = waterPercentage * 2 - 1;
        yd += 0.04f * bob;
    } else {
        if (yd < 0) yd /= 2;
        yd += 0.007f;
    }

    if (rider.lock() != nullptr &&
        rider.lock()->instanceof(eTYPE_LIVINGENTITY)) {
        std::shared_ptr<LivingEntity> livingRider =
            std::dynamic_pointer_cast<LivingEntity>(rider.lock());
        double forward = livingRider->yya;

        if (forward > 0) {
            double riderXd = -sin(livingRider->yRot * PI / 180);
            double riderZd = cos(livingRider->yRot * PI / 180);
            xd += riderXd * acceleration * 0.05f;
            zd += riderZd * acceleration * 0.05f;
        }
    }

    double curSpeed = sqrt(xd * xd + zd * zd);

    if (curSpeed > MAX_SPEED) {
        double ratio = MAX_SPEED / curSpeed;

        xd *= ratio;
        zd *= ratio;
        curSpeed = MAX_SPEED;
    }

    if (curSpeed > lastSpeed && acceleration < MAX_ACCELERATION) {
        acceleration += (MAX_ACCELERATION - acceleration) / 35;
        if (acceleration > MAX_ACCELERATION) acceleration = MAX_ACCELERATION;
    } else {
        acceleration -= (acceleration - MIN_ACCELERATION) / 35;
        if (acceleration < MIN_ACCELERATION) acceleration = MIN_ACCELERATION;
    }

    if (onGround) {
        xd *= 0.5f;
        yd *= 0.5f;
        zd *= 0.5f;
    }
    move(xd, yd, zd);

    if ((horizontalCollision && lastSpeed > 0.20)) {
        if (!level->isClientSide && !removed) {
            remove();
            for (int i = 0; i < 3; i++) {
                spawnAtLocation(Tile::wood_Id, 1, 0);
            }
            for (int i = 0; i < 2; i++) {
                spawnAtLocation(Item::stick->id, 1, 0);
            }
        }
    } else {
        xd *= 0.99f;
        yd *= 0.95f;
        zd *= 0.99f;
    }

    xRot = 0;
    double yRotT = yRot;
    double xDiff = xo - x;
    double zDiff = zo - z;
    if (xDiff * xDiff + zDiff * zDiff > 0.001) {
        yRotT = (float)(atan2(zDiff, xDiff) * 180 / PI);
    }

    double rotDiff = Mth::wrapDegrees(yRotT - yRot);

    if (rotDiff > 20) rotDiff = 20;
    if (rotDiff < -20) rotDiff = -20;

    yRot += (float)rotDiff;
    setRot(yRot, xRot);

    if (level->isClientSide) return;

    AABB grown = bb.grow(0.2, 0, 0.2);
    std::vector<std::shared_ptr<Entity> >* entities =
        level->getEntities(shared_from_this(), &grown);
    if (entities != nullptr && !entities->empty()) {
        auto itEnd = entities->end();
        for (auto it = entities->begin(); it != itEnd; it++) {
            std::shared_ptr<Entity> e = (*it);  // entities->at(i);
            if (e != rider.lock() && e->isPushable() &&
                e->GetType() == eTYPE_BOAT) {
                e->push(shared_from_this());
            }
        }
    }

    for (int i = 0; i < 4; i++) {
        int xx = Mth::floor(x + ((i % 2) - 0.5) * 0.8);
        int zz = Mth::floor(z + ((i / 2) - 0.5) * 0.8);

        for (int j = 0; j < 2; j++) {
            int yy = Mth::floor(y) + j;
            int tile = level->getTile(xx, yy, zz);

            if (tile == Tile::topSnow_Id) {
                level->removeTile(xx, yy, zz);
            } else if (tile == Tile::waterLily_Id) {
                level->destroyTile(xx, yy, zz, true);
            }
        }
    }

    if (rider.lock() != nullptr) {
        if (rider.lock()->removed) rider = std::weak_ptr<Entity>();
    }
}

void Boat::positionRider() {
    if (rider.lock() == nullptr) return;

    double xa = cos(yRot * PI / 180) * 0.4;
    double za = sin(yRot * PI / 180) * 0.4;
    rider.lock()->setPos(
        x + xa, y + getRideHeight() + rider.lock()->getRidingHeight(), z + za);
}

void Boat::addAdditonalSaveData(CompoundTag* base) {}

void Boat::readAdditionalSaveData(CompoundTag* base) {}

float Boat::getShadowHeightOffs() { return 0; }

std::wstring Boat::getName() { return L"Boat"; }

bool Boat::interact(std::shared_ptr<Player> player) {
    if ((rider.lock() != nullptr) && rider.lock()->instanceof(eTYPE_PLAYER) &&
        (rider.lock() != player))
        return true;
    if (!level->isClientSide) {
        // 4J HEG - Fixed issue with player not being able to dismount boat
        // (issue #4446)
        player->ride(rider.lock() == player ? nullptr : shared_from_this());
    }
    return true;
}

void Boat::setDamage(float damage) { entityData->set(DATA_ID_DAMAGE, damage); }

float Boat::getDamage() { return entityData->getFloat(DATA_ID_DAMAGE); }

void Boat::setHurtTime(int hurtTime) {
    entityData->set(DATA_ID_HURT, hurtTime);
}

int Boat::getHurtTime() { return entityData->getInteger(DATA_ID_HURT); }

void Boat::setHurtDir(int hurtDir) {
    entityData->set(DATA_ID_HURTDIR, hurtDir);
}

int Boat::getHurtDir() { return entityData->getInteger(DATA_ID_HURTDIR); }

bool Boat::getDoLerp() { return doLerp; }

void Boat::setDoLerp(bool doLerp) { this->doLerp = doLerp; }