ObjectHeyhoBall.cc

#include "ObjectHeyhoBall.hh"
 
#include "game/field/ObjectDirector.hh"
 
#include "game/kart/Reaction.hh"
 
namespace Kinoko::Field {

ObjectHeyhoBall::ObjectHeyhoBall(const System::MapdataGeoObj &params)
    : ObjectProjectile(params), StateManager(this, STATE_ENTRIES),
      m_airtime(static_cast<f32>(params.setting(1))), m_initPos(params.pos()) {
    registerManagedObject();
}

ObjectHeyhoBall::~ObjectHeyhoBall() = default;

void ObjectHeyhoBall::init() {
    m_nextStateId = 0;
    m_shipPos.setZero();
    m_workingPos = pos();
    m_intensity = ExplosionIntensity::ExplosionLoseItem;
 
    resize(BLAST_RADIUS, 0.0f);
 
    const auto &flowTable = ObjectDirector::Instance()->flowTable();
    m_blastRadiusRatio = BLAST_RADIUS /
            static_cast<f32>(parse<s16>(flowTable.set(flowTable.slot(id()))->params.sphere.radius));
}

Kart::Reaction ObjectHeyhoBall::onCollision(Kart::KartObject * /*kartObj*/,
        Kart::Reaction /*reactionOnKart*/, Kart::Reaction /*reactionOnObj*/,
        EGG::Vector3f &hitDepth) {
    if (m_currentStateId == 3) {
        if (m_intensity == ExplosionIntensity::ExplosionLoseItem) {
            return Kart::Reaction::ExplosionLoseItem;
        }
 
        hitDepth.setZero();
        return Kart::Reaction::SpinSomeSpeed;
    }
 
    return Kart::Reaction::WallAllSpeed;
}

void ObjectHeyhoBall::initProjectile(const EGG::Vector3f &pos) {
    m_shipPos = pos;
    m_xzDir = (m_initPos + EGG::Vector3f::ey * -BALL_RADIUS) - m_shipPos;
    m_xzDir.y = 0.0f;
    m_xzDir.normalise2();
 
    EGG::Vector2f xzDist = EGG::Vector2f(m_shipPos.x - m_initPos.x, m_shipPos.z - m_initPos.z);
    m_xzSpeed = EGG::Mathf::sqrt(xzDist.dot()) / m_airtime;
    m_yDist = m_initPos.y + -BALL_RADIUS - m_shipPos.y;
    m_initYSpeed = m_yDist / m_airtime + 0.5f * 4.0f * m_airtime;
}

void ObjectHeyhoBall::enterFalling() {
    if (!getUnit()) {
        loadAABB(0.0f);
        resize(BLAST_RADIUS, 0.0f);
    }
}

void ObjectHeyhoBall::calcFalling() {
    f32 currentHeight = m_workingPos.y + (m_initYSpeed - 4.0f * static_cast<f32>(m_currentFrame));
    if (currentHeight > m_initPos.y + -BALL_RADIUS) {
        m_workingPos.y = currentHeight;
        m_workingPos.x += m_xzDir.x * m_xzSpeed;
        m_workingPos.z += m_xzDir.z * m_xzSpeed;
    } else {
        m_nextStateId = 2;
        m_workingPos = (m_workingPos + m_initPos + EGG::Vector3f::ey * -BALL_RADIUS) * 0.5f;
    }
}

void ObjectHeyhoBall::calcExploding() {
    constexpr u32 EXPLODE_FRAMES = 46;
    constexpr EGG::Vector3f BALL_SCALE = EGG::Vector3f(1.001f, 1.001f, 1.001f);

    constexpr u32 SPIN_FRAME = 32;
 
    if (m_currentFrame >= EXPLODE_FRAMES) {
        setScale(BALL_SCALE);
 
        if (getUnit()) {
            unregisterCollision();
        }
 
        m_nextStateId = 0;
        m_intensity = ExplosionIntensity::ExplosionLoseItem;
    } else {
        f32 shrinkFrames = static_cast<f32>(m_currentFrame) - 40.0f;
        f32 scale = 1.2f * m_blastRadiusRatio + -m_scaleChangeRate * shrinkFrames * shrinkFrames;
 
        scale = std::min(m_blastRadiusRatio, scale);
        setScale(scale);
 
        m_intensity = m_currentFrame >= SPIN_FRAME ? ExplosionIntensity::SpinSomeSpeed :
                                                     ExplosionIntensity::ExplosionLoseItem;
    }
}
 
} // namespace Kinoko::Field