metaforce/Runtime/Weapon/CGameProjectile.cpp

#include "Runtime/Weapon/CGameProjectile.hpp"

#include <utility>

#include "Runtime/CStateManager.hpp"
#include "Runtime/Collision/CCollisionActor.hpp"
#include "Runtime/Collision/CInternalRayCastStructure.hpp"
#include "Runtime/MP1/World/CPuddleToadGamma.hpp"
#include "Runtime/World/CGameLight.hpp"
#include "Runtime/World/CHUDBillboardEffect.hpp"
#include "Runtime/World/CPlayer.hpp"
#include "Runtime/World/CScriptDoor.hpp"
#include "Runtime/World/CScriptPlatform.hpp"
#include "Runtime/World/CWallCrawlerSwarm.hpp"

#include "TCastTo.hpp" // Generated file, do not modify include path

namespace urde {
CGameProjectile::CGameProjectile(bool active, const TToken<CWeaponDescription>& wDesc, std::string_view name,
                                 EWeaponType wType, const zeus::CTransform& xf, EMaterialTypes excludeMat,
                                 const CDamageInfo& dInfo, TUniqueId uid, TAreaId aid, TUniqueId owner,
                                 TUniqueId homingTarget, EProjectileAttrib attribs, bool underwater,
                                 const zeus::CVector3f& scale,
                                 std::optional<TLockedToken<CGenDescription>> visorParticle, u16 visorSfx,
                                 bool sendCollideMsg)
: CWeapon(uid, aid, active, owner, wType, name, xf,
          CMaterialFilter::MakeIncludeExclude(
              {EMaterialTypes::Solid, EMaterialTypes::NonSolidDamageable},
              {EMaterialTypes::Projectile, EMaterialTypes::ProjectilePassthrough, excludeMat}),
          CMaterialList(EMaterialTypes::Projectile), dInfo, attribs | GetBeamAttribType(wType),
          CModelData::CModelDataNull())
, x158_visorParticle(std::move(visorParticle))
, x168_visorSfx(visorSfx)
, x170_projectile(wDesc, xf.origin, xf.basis, scale,
                  (attribs & EProjectileAttrib::ParticleOPTS) == EProjectileAttrib::ParticleOPTS)
, x298_previousPos(xf.origin)
, x2a4_projExtent((xe8_projectileAttribs & EProjectileAttrib::BigProjectile) == EProjectileAttrib::BigProjectile ? 0.25f
                                                                                                                 : 0.1f)
, x2c0_homingTargetId(homingTarget)
, x2cc_wpscId(wDesc.GetObjectTag()->id)
, x2e4_24_active(true)
, x2e4_25_startedUnderwater(underwater)
, x2e4_26_waterUpdate(underwater)
, x2e4_27_inWater(underwater)
, x2e4_28_sendProjectileCollideMsg(sendCollideMsg) {}

void CGameProjectile::Accept(urde::IVisitor& visitor) { visitor.Visit(this); }

void CGameProjectile::ResolveCollisionWithActor(const CRayCastResult& res, CActor& act, CStateManager& mgr) {
  const zeus::CVector3f revDir = -x34_transform.basis[1].normalized();
  const TCastToConstPtr<CPlayer> player(act);

  if (!player) {
    return;
  }

  if (!x158_visorParticle || mgr.GetPlayer().GetCameraState() != CPlayer::EPlayerCameraState::FirstPerson) {
    return;
  }

  if (zeus::radToDeg(
          std::acos(mgr.GetCameraManager()->GetCurrentCameraTransform(mgr).basis[1].normalized().dot(revDir))) > 45.f) {
    return;
  }

  // Hit us head on! Draw Billboard!
  std::optional<TToken<CGenDescription>> bb = {*x158_visorParticle};
  auto* effect = new CHUDBillboardEffect(
      bb, {}, mgr.AllocateUniqueId(), true, "VisorAcid", CHUDBillboardEffect::GetNearClipDistance(mgr),
      CHUDBillboardEffect::GetScaleForPOV(mgr), zeus::skWhite, zeus::skOne3f, zeus::skZero3f);
  mgr.AddObject(effect);
  CSfxManager::SfxStart(x168_visorSfx, 1.f, 0.f, false, 0x7f, false, kInvalidAreaId);

  if (!x2e4_28_sendProjectileCollideMsg) {
    return;
  }

  mgr.SendScriptMsg(&mgr.GetPlayer(), GetUniqueId(), EScriptObjectMessage::ProjectileCollide);
}

void CGameProjectile::AcceptScriptMsg(EScriptObjectMessage msg, TUniqueId /*uid*/, CStateManager& mgr) {
  if (msg == EScriptObjectMessage::AddSplashInhabitant) {
    if (!x2e4_27_inWater) {
      x2e4_27_inWater = true;
      x2e4_26_waterUpdate = true;
    }
  } else if (msg == EScriptObjectMessage::UpdateSplashInhabitant) {
    if (!x2e4_26_waterUpdate)
      x2e4_26_waterUpdate = true;
  } else if (msg == EScriptObjectMessage::RemoveSplashInhabitant) {
    if (x2e4_26_waterUpdate) {
      x2e4_26_waterUpdate = false;
      x2e4_27_inWater = false;
    }
  } else if (msg == EScriptObjectMessage::Deleted)
    DeleteProjectileLight(mgr);
}

EProjectileAttrib CGameProjectile::GetBeamAttribType(EWeaponType wType) {
  if (wType == EWeaponType::Ice)
    return EProjectileAttrib::Ice;
  else if (wType == EWeaponType::Wave)
    return EProjectileAttrib::Wave;
  else if (wType == EWeaponType::Plasma)
    return EProjectileAttrib::Plasma;
  else if (wType == EWeaponType::Phazon)
    return EProjectileAttrib::Phazon;

  return EProjectileAttrib::None;
}

void CGameProjectile::DeleteProjectileLight(CStateManager& mgr) {
  if (x2c8_projectileLight != kInvalidUniqueId) {
    mgr.FreeScriptObject(x2c8_projectileLight);
    x2c8_projectileLight = kInvalidUniqueId;
  }
}

void CGameProjectile::CreateProjectileLight(std::string_view name, const CLight& light, CStateManager& mgr) {
  DeleteProjectileLight(mgr);
  x2c8_projectileLight = mgr.AllocateUniqueId();
  mgr.AddObject(new CGameLight(x2c8_projectileLight, GetAreaId(), GetActive(), name, GetTransform(), GetUniqueId(),
                               light, u32(x2cc_wpscId.Value()), 0, 0.f));
}

void CGameProjectile::Chase(float dt, CStateManager& mgr) {
  if (!x170_projectile.IsProjectileActive() || x2c0_homingTargetId == kInvalidUniqueId)
    return;

  if (const TCastToConstPtr<CActor> act = mgr.GetObjectById(x2c0_homingTargetId)) {
    if (!act->GetMaterialList().HasMaterial(EMaterialTypes::Target) &&
        !act->GetMaterialList().HasMaterial(EMaterialTypes::Player)) {
      x2c0_homingTargetId = kInvalidUniqueId;
    } else {
      zeus::CVector3f homingPos = act->GetHomingPosition(mgr, 0.f);

      const TCastToConstPtr<CWallCrawlerSwarm> swarm = act.GetPtr();
      if (swarm) {
        int lockOnId = swarm->GetCurrentLockOnId();
        if (swarm->GetLockOnLocationValid(lockOnId)) {
          homingPos = swarm->GetLockOnLocation(lockOnId);
        } else {
          x2c0_homingTargetId = kInvalidUniqueId;
          return;
        }
      }

      zeus::CVector3f projToPos = homingPos - x170_projectile.GetTranslation();
      if (x2e0_minHomingDist > 0.f && projToPos.magnitude() < x2e0_minHomingDist) {
        x2c0_homingTargetId = kInvalidUniqueId;
        return;
      }

      if (!swarm && !TCastToConstPtr<CPhysicsActor>(act.GetPtr()))
        if (auto tb = act->GetTouchBounds())
          projToPos.z() += (tb->max.z() - tb->min.z()) * 0.5f;

      zeus::CQuaternion qDelta =
          zeus::CQuaternion::shortestRotationArc(x170_projectile.GetTransform().basis[1], projToPos);

      float wThres = qDelta.w() * qDelta.w() * 2.f - 1.f;
      if (wThres > 0.99f)
        return;

      float turnRate;
      if (x2e4_26_waterUpdate)
        turnRate = x170_projectile.GetMaxTurnRate() * 0.5f;
      else
        turnRate = x170_projectile.GetMaxTurnRate();

      float maxTurnDelta = zeus::degToRad(turnRate * dt);
      float turnDelta = std::acos(wThres);
      if (maxTurnDelta < turnDelta) {
        /* Clamp quat to max delta */
        qDelta =
            zeus::CQuaternion(std::cos(maxTurnDelta * 0.5f),
                              (std::sin(maxTurnDelta * 0.5f) / std::sin(turnDelta * 0.5f)) * qDelta.getImaginary());
      }

      zeus::CTransform xf = qDelta.toTransform() * x170_projectile.GetTransform();
      xf.orthonormalize();
      x170_projectile.SetWorldSpaceOrientation(xf);
    }
  }
}

void CGameProjectile::UpdateHoming(float dt, CStateManager& mgr) {
  if (!x2e4_24_active || x2c0_homingTargetId == kInvalidUniqueId || x2a8_homingDt <= 0.f)
    return;

  x2b0_targetHomingTime += dt;

  while (x2b0_targetHomingTime >= x2b8_curHomingTime) {
    Chase(x2a8_homingDt, mgr);
    x2b8_curHomingTime += x2a8_homingDt;
  }
}

void CGameProjectile::UpdateProjectileMovement(float dt, CStateManager& mgr) {
  float useDt = dt;
  if (x2e4_26_waterUpdate)
    useDt = 37.5f * dt * dt;

  x298_previousPos = x34_transform.origin;
  x170_projectile.Update(useDt);
  SetTransform(x170_projectile.GetTransform());
  SetTranslation(x170_projectile.GetTranslation());
  UpdateHoming(dt, mgr);
}

CRayCastResult CGameProjectile::DoCollisionCheck(TUniqueId& idOut, CStateManager& mgr) {
  CRayCastResult res;
  if (x2e4_24_active) {
    zeus::CVector3f posDelta = x34_transform.origin - x298_previousPos;
    rstl::reserved_vector<TUniqueId, 1024> nearList;
    mgr.BuildNearList(nearList, GetProjectileBounds(),
                      CMaterialFilter::MakeExclude(EMaterialTypes::ProjectilePassthrough), this);

    res = RayCollisionCheckWithWorld(idOut, x298_previousPos, x34_transform.origin, posDelta.magnitude(), nearList, mgr);
  }
  return res;
}

void CGameProjectile::ApplyDamageToActors(CStateManager& mgr, const CDamageInfo& dInfo) {
  if (x2c6_pendingDamagee != kInvalidUniqueId) {
    if (const TCastToConstPtr<CActor> act = mgr.ObjectById(x2c6_pendingDamagee)) {
      mgr.ApplyDamage(GetUniqueId(), act->GetUniqueId(), xec_ownerId, dInfo, xf8_filter, x34_transform.basis[1]);
      if ((xe8_projectileAttribs & EProjectileAttrib::PlayerUnFreeze) == EProjectileAttrib::PlayerUnFreeze &&
          mgr.GetPlayer().GetUniqueId() == act->GetUniqueId() && mgr.GetPlayer().GetFrozenState()) {
        mgr.GetPlayer().UnFreeze(mgr);
      }
    }
    x2c6_pendingDamagee = kInvalidUniqueId;
  }

  for (const CProjectileTouchResult& res : x2d0_touchResults) {
    if (const TCastToConstPtr<CActor> act = mgr.GetObjectById(res.GetActorId())) {
      mgr.ApplyDamage(GetUniqueId(), act->GetUniqueId(), xec_ownerId, dInfo, xf8_filter, x34_transform.basis[1]);
      if ((xe8_projectileAttribs & EProjectileAttrib::PlayerUnFreeze) == EProjectileAttrib::PlayerUnFreeze &&
          mgr.GetPlayer().GetUniqueId() == act->GetUniqueId() && mgr.GetPlayer().GetFrozenState()) {
        mgr.GetPlayer().UnFreeze(mgr);
      }
    }
  }

  x2d0_touchResults.clear();
}

void CGameProjectile::FluidFXThink(EFluidState state, CScriptWater& water, CStateManager& mgr) {
  if (x170_projectile.GetWeaponDescription()->xa6_SWTR)
    CWeapon::FluidFXThink(state, water, mgr);
}

CRayCastResult CGameProjectile::RayCollisionCheckWithWorld(TUniqueId& idOut, const zeus::CVector3f& start,
                                                           const zeus::CVector3f& end, float mag,
                                                           const rstl::reserved_vector<TUniqueId, 1024>& nearList,
                                                           CStateManager& mgr) {
  x2d0_touchResults.clear();
  idOut = kInvalidUniqueId;
  x2c6_pendingDamagee = kInvalidUniqueId;
  CRayCastResult res;
  zeus::CVector3f delta = end - start;
  if (!delta.canBeNormalized())
    return res;

  float bestMag = mag;
  zeus::CVector3f dir = delta.normalized();
  CRayCastResult res2 = mgr.RayStaticIntersection(start, dir, mag, xf8_filter);
  if (res2.IsValid()) {
    bestMag = res2.GetT();
    res = res2;
  }

  for (TUniqueId id : nearList) {
    if (CActor* ent = static_cast<CActor*>(mgr.ObjectById(id))) {
      CProjectileTouchResult tRes = CanCollideWith(*ent, mgr);
      if (tRes.GetActorId() == kInvalidUniqueId)
        continue;
      if (tRes.HasRayCastResult()) {
        if (tRes.GetRayCastResult().GetT() < bestMag) {
          ent->Touch(*this, mgr);
          bestMag = tRes.GetRayCastResult().GetT();
          res = tRes.GetRayCastResult();
          x2c6_pendingDamagee = idOut = tRes.GetActorId();
        }
      } else {
        auto tb = ent->GetTouchBounds();
        const CGameProjectile* projObj = nullptr;
        if (const TCastToConstPtr<CScriptDoor> door = ent) {
          tb = door->GetProjectileBounds();
        } else if (const TCastToConstPtr<CGameProjectile> proj = ent) {
          tb.emplace(proj->GetProjectileBounds());
          projObj = proj.GetPtr();
        }
        if (!tb)
          continue;

        CCollidableAABox prim(*tb, ent->GetMaterialList());
        CRayCastResult res3 =
            prim.CastRayInternal(CInternalRayCastStructure(start, dir, mag, {}, CMaterialFilter::skPassEverything));
        if (res3.IsValid()) {
          if (res3.GetT() < bestMag) {
            bestMag = res3.GetT();
            res = res3;
            x2c6_pendingDamagee = idOut = tRes.GetActorId();
          }
        } else if (tb->pointInside(start) || (projObj && projObj->GetProjectileBounds().intersects(*tb))) {
          x2c6_pendingDamagee = idOut = ent->GetUniqueId();
          zeus::CUnitVector3f norm(-dir);
          res = CRayCastResult(0.f, start, {norm, norm.dot(start)}, ent->GetMaterialList());
          break;
        }
      }
    }
  }

  if (x2e4_27_inWater && idOut == kInvalidUniqueId)
    x2e4_27_inWater = false;

  return res;
}

CProjectileTouchResult CGameProjectile::CanCollideWith(CActor& act, CStateManager& mgr) const {
  if (act.GetDamageVulnerability()->GetVulnerability(x12c_curDamageInfo.GetWeaponMode(), false) ==
      EVulnerability::PassThrough) {
    return {kInvalidUniqueId, std::nullopt};
  }

  if (TCastToConstPtr<CScriptTrigger>(act)) {
    return CanCollideWithTrigger(act, mgr);
  } else if (TCastToConstPtr<CScriptPlatform>(act) || TCastToConstPtr<CCollisionActor>(act) ||
             CPatterned::CastTo<MP1::CPuddleToadGamma>(&act)) {
    return CanCollideWithComplexCollision(act, mgr);
  } else {
    return CanCollideWithGameObject(act, mgr);
  }
}

CProjectileTouchResult CGameProjectile::CanCollideWithComplexCollision(const CActor& act,
                                                                       const CStateManager& mgr) const {
  const CPhysicsActor* useAct = nullptr;
  if (const TCastToConstPtr<CScriptPlatform> plat = act) {
    if (plat->HasComplexCollision()) {
      useAct = plat.GetPtr();
    }
  } else if (const MP1::CPuddleToadGamma* toad = CPatterned::CastTo<MP1::CPuddleToadGamma>(&act)) {
    useAct = toad;
  } else if (const TCastToConstPtr<CCollisionActor> cact = act) {
    if (cact->GetOwnerId() == xec_ownerId) {
      return {kInvalidUniqueId, std::nullopt};
    }
    useAct = cact.GetPtr();
  }

  if (!useAct) {
    return {act.GetUniqueId(), std::nullopt};
  }

  const CCollisionPrimitive* prim = useAct->GetCollisionPrimitive();
  const zeus::CTransform xf = useAct->GetPrimitiveTransform();
  const zeus::CVector3f deltaPos = GetTranslation() - x298_previousPos;
  if (!deltaPos.canBeNormalized()) {
    return {kInvalidUniqueId, std::nullopt};
  }

  const zeus::CVector3f dir = deltaPos.normalized();
  float mag = deltaPos.magnitude();
  const CRayCastResult res = prim->CastRayInternal(
      {x298_previousPos, dir, mag, xf,
       CMaterialFilter::MakeIncludeExclude({EMaterialTypes::Solid}, {EMaterialTypes::ProjectilePassthrough})});
  if (res.IsValid()) {
    return {act.GetUniqueId(), {res}};
  }

  if (prim->GetPrimType() == FOURCC('SPHR')) {
    mag *= 2.f;
    const CRayCastResult res2 = prim->CastRayInternal(
        {x298_previousPos - dir * mag, dir, deltaPos.magnitude(), xf,
         CMaterialFilter::MakeIncludeExclude({EMaterialTypes::Solid}, {EMaterialTypes::ProjectilePassthrough})});
    if (res2.IsValid()) {
      return {act.GetUniqueId(), {res2}};
    }
  } else if (const TCastToConstPtr<CCollisionActor> cAct = act) {
    const float rad = cAct->GetSphereRadius();
    if ((x298_previousPos - GetTranslation()).magSquared() < rad * rad) {
      const zeus::CVector3f point = x298_previousPos - dir * rad * 1.125f;
      const zeus::CUnitVector3f revDir(-dir);
      return {act.GetUniqueId(), {{0.f, point, {revDir, point.dot(revDir)}, act.GetMaterialList()}}};
    }
  }

  return {kInvalidUniqueId, std::nullopt};
}

CProjectileTouchResult CGameProjectile::CanCollideWithGameObject(CActor& act, CStateManager& mgr) const {
  const TCastToConstPtr<CGameProjectile> proj = act;
  if (!proj) {
    if (!act.GetMaterialList().HasMaterial(EMaterialTypes::Solid) && !act.HealthInfo(mgr)) {
      return {kInvalidUniqueId, std::nullopt};
    } else if (act.GetUniqueId() == xec_ownerId) {
      return {kInvalidUniqueId, std::nullopt};
    } else if (act.GetUniqueId() == x2c2_lastResolvedObj) {
      return {kInvalidUniqueId, std::nullopt};
    } else if (xf8_filter.GetExcludeList().Intersection(act.GetMaterialList())) {
      return {kInvalidUniqueId, std::nullopt};
    } else if (TCastToPtr<CAi> ai = act) {
      if (!ai->CanBeShot(mgr, int(xe8_projectileAttribs))) {
        return {kInvalidUniqueId, std::nullopt};
      }
    }
  } else if ((xe8_projectileAttribs & EProjectileAttrib::PartialCharge) == EProjectileAttrib::PartialCharge ||
             (proj->xe8_projectileAttribs & EProjectileAttrib::PartialCharge) == EProjectileAttrib::PartialCharge) {
    return {act.GetUniqueId(), std::nullopt};
  } else if ((xe8_projectileAttribs & EProjectileAttrib::PartialCharge) != EProjectileAttrib::PartialCharge &&
             (proj->xe8_projectileAttribs & EProjectileAttrib::PartialCharge) != EProjectileAttrib::PartialCharge) {
    return {kInvalidUniqueId, std::nullopt};
  }
  return {act.GetUniqueId(), std::nullopt};
}

CProjectileTouchResult CGameProjectile::CanCollideWithTrigger(const CActor& act, const CStateManager& mgr) const {
  const bool isWater = TCastToConstPtr<CScriptWater>(act).operator bool();
  if (isWater) {
    bool enteredWater = false;
    if (isWater && !x2e4_25_startedUnderwater) {
      if (!x170_projectile.GetWeaponDescription()->xa4_EWTR) {
        enteredWater = true;
      }
    }
    /* This case is logically unreachable */
    bool leftWater = false;
    if (!isWater && x2e4_25_startedUnderwater) {
      if (!x170_projectile.GetWeaponDescription()->xa5_LWTR) {
        leftWater = true;
      }
    }
    return {(enteredWater || leftWater) ? act.GetUniqueId() : kInvalidUniqueId, std::nullopt};
  }
  return {kInvalidUniqueId, std::nullopt};
}

zeus::CAABox CGameProjectile::GetProjectileBounds() const {
  return {{std::min(x298_previousPos.x(), GetTranslation().x()) - x2a4_projExtent,
           std::min(x298_previousPos.y(), GetTranslation().y()) - x2a4_projExtent,
           std::min(x298_previousPos.z(), GetTranslation().z()) - x2a4_projExtent},
          {std::max(x298_previousPos.x(), GetTranslation().x()) + x2a4_projExtent,
           std::max(x298_previousPos.y(), GetTranslation().y()) + x2a4_projExtent,
           std::max(x298_previousPos.z(), GetTranslation().z()) + x2a4_projExtent}};
}

std::optional<zeus::CAABox> CGameProjectile::GetTouchBounds() const {
  if (x2e4_24_active) {
    return {GetProjectileBounds()};
  }
  return std::nullopt;
}

} // namespace urde