metaforce/Runtime/Camera/CPathCamera.cpp

#include "CPathCamera.hpp"
#include "CCameraManager.hpp"
#include "CStateManager.hpp"
#include "CBallCamera.hpp"
#include "World/CScriptCameraHint.hpp"
#include "World/CPlayer.hpp"
#include "World/CScriptDoor.hpp"
#include "GameGlobalObjects.hpp"
#include "TCastTo.hpp"

namespace urde {

CPathCamera::CPathCamera(TUniqueId uid, std::string_view name, const CEntityInfo& info, const zeus::CTransform& xf,
                         bool active, float lengthExtent, float filterMag, float filterProportion, float minEaseDist,
                         float maxEaseDist, u32 flags, EInitialSplinePosition initPos)
: CGameCamera(uid, active, name, info, xf, CCameraManager::ThirdPersonFOV(), CCameraManager::NearPlane(),
              CCameraManager::FarPlane(), CCameraManager::Aspect(), kInvalidUniqueId, 0, 0)
, x188_spline(flags & 1)
, x1dc_lengthExtent(lengthExtent)
, x1e0_filterMag(filterMag)
, x1e4_filterProportion(filterProportion)
, x1e8_initPos(initPos)
, x1ec_flags(flags)
, x1f0_minEaseDist(minEaseDist)
, x1f4_maxEaseDist(maxEaseDist) {}

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

void CPathCamera::AcceptScriptMsg(EScriptObjectMessage msg, TUniqueId uid, CStateManager& mgr) {
  CGameCamera::AcceptScriptMsg(msg, uid, mgr);

  if (GetActive() && msg == EScriptObjectMessage::InitializedInArea)
    x188_spline.Initialize(GetUniqueId(), GetConnectionList(), mgr);
}

void CPathCamera::Think(float dt, CStateManager& mgr) {
  if (!GetActive())
    return;

  if (mgr.GetCameraManager()->GetPathCameraId() != GetUniqueId())
    return;

  if (x188_spline.GetSize() <= 0)
    return;

  zeus::CTransform xf = GetTransform();
  zeus::CVector3f ballLook = mgr.GetCameraManager()->GetBallCamera()->GetLookPos();
  if ((x1ec_flags & 0x10)) {
    if (const CScriptCameraHint* hint = mgr.GetCameraManager()->GetCameraHint(mgr))
      ballLook.z() = hint->GetTranslation().z();
  }

  if (!mgr.GetPlayer().GetVelocity().canBeNormalized() && (ballLook - GetTranslation()).canBeNormalized()) {
    if (x1ec_flags & 4)
      SetTransform(x188_spline.GetInterpolatedSplinePointByLength(x1d4_pos));
    else
      SetTransform(zeus::lookAt(GetTranslation(), ballLook));
    return;
  }

  xf = MoveAlongSpline(dt, mgr);
  SetTranslation(xf.origin);

  if (x1ec_flags & 0x20)
    ClampToClosedDoor(mgr);

  zeus::CVector3f tmp = ballLook - GetTranslation();
  tmp.z() = 0.f;
  if (tmp.canBeNormalized())
    SetTransform(zeus::lookAt(GetTranslation(), ballLook));

  if (x1ec_flags & 4)
    SetTransform(xf);
}

void CPathCamera::ProcessInput(const CFinalInput&, CStateManager& mgr) {
  // Empty
}

static const CMaterialFilter kLineOfSightFilter =
    CMaterialFilter::MakeIncludeExclude({EMaterialTypes::Solid}, {EMaterialTypes::ProjectilePassthrough});

void CPathCamera::Reset(const zeus::CTransform&, CStateManager& mgr) {
  CPlayer& player = mgr.GetPlayer();
  zeus::CVector3f playerPt =
      player.GetTranslation() + zeus::CVector3f(0.f, 0.f, g_tweakPlayer->GetPlayerBallHalfExtent());
  float closestLength = x188_spline.FindClosestLengthOnSpline(0.f, playerPt);

  float negLength = std::max(0.f, closestLength - x1dc_lengthExtent);
  zeus::CVector3f negPoint = x188_spline.GetInterpolatedSplinePointByLength(negLength).origin;

  float posLength = std::min(x188_spline.GetLength(), closestLength + x1dc_lengthExtent);
  zeus::CVector3f posPoint = x188_spline.GetInterpolatedSplinePointByLength(posLength).origin;

  zeus::CTransform camXf = mgr.GetCameraManager()->GetBallCamera()->GetTransform();
  if (player.GetMorphballTransitionState() != CPlayer::EPlayerMorphBallState::Morphed)
    camXf = mgr.GetCameraManager()->GetCurrentCameraTransform(mgr);

  bool neg = false;
  if (x1e8_initPos == EInitialSplinePosition::BallCamBasis) {
    zeus::CVector3f tmp = playerPt - negPoint;
    if (tmp.canBeNormalized()) {
      if (tmp.normalized().dot(camXf.basis[1]) > 0.f)
        neg = true;
    }
  } else {
    neg = x1e8_initPos == EInitialSplinePosition::Negative;
  }

#if 0
    zeus::CVector3f camToSpline = splinePt - camXf.origin;
    mgr.RayStaticIntersection(camXf.origin, camToSpline.normalized(), camToSpline.magnitude(), kLineOfSightFilter);
    zeus::CVector3f camToSpline2 = splinePt2 - camXf.origin;
    mgr.RayStaticIntersection(camXf.origin, camToSpline2.normalized(), camToSpline2.magnitude(), kLineOfSightFilter);
#endif

  zeus::CVector3f viewPoint;
  if (neg) {
    x1d4_pos = negLength;
    viewPoint = negPoint;
  } else {
    x1d4_pos = posLength;
    viewPoint = posPoint;
  }

  if (x1e8_initPos == EInitialSplinePosition::ClampBasis) {
    if (x188_spline.ClampLength(playerPt, false, kLineOfSightFilter, mgr) <= negLength) {
      x1d4_pos = negLength;
      viewPoint = negPoint;
    } else {
      x1d4_pos = posLength;
      viewPoint = posPoint;
    }
  }

  SetTransform(zeus::lookAt(viewPoint, mgr.GetCameraManager()->GetBallCamera()->GetFixedLookPos()));
}

zeus::CTransform CPathCamera::MoveAlongSpline(float t, CStateManager& mgr) {
  zeus::CTransform ret = x34_transform;
  x1d8_time = x188_spline.FindClosestLengthOnSpline(x1d8_time, mgr.GetPlayer().GetTranslation());
  float f30 = x1dc_lengthExtent;
  if (x1ec_flags & 0x8) {
    zeus::CVector3f splineToPlayer =
        mgr.GetPlayer().GetTranslation() - x188_spline.GetInterpolatedSplinePointByLength(x1d8_time).origin;
    float distToPlayer = 0.f;
    splineToPlayer.z() = 0.f;
    if (splineToPlayer.canBeNormalized())
      distToPlayer = splineToPlayer.magnitude();
    float easedDistT = (distToPlayer - x1f0_minEaseDist) / (x1f4_maxEaseDist - x1f0_minEaseDist);
    f30 *= 1.f - std::sin(zeus::degToRad(zeus::clamp(0.f, easedDistT, 1.f) * 90.f));
  }

  float newPos;
  if (x188_spline.IsClosedLoop()) {
    float lenA = x188_spline.ValidateLength(x1d8_time + f30);
    newPos = x188_spline.ValidateLength(x1d8_time - f30);
    float disp = std::fabs(x1d4_pos - x1d8_time);
    float remLen = x188_spline.GetLength() - disp;
    if (x1d4_pos > x1d8_time) {
      if (disp <= remLen)
        newPos = lenA;
    } else {
      if (disp > remLen)
        newPos = lenA;
    }
  } else {
    if (x1d4_pos > x1d8_time)
      newPos = x188_spline.ValidateLength(x1d8_time + f30);
    else
      newPos = x188_spline.ValidateLength(x1d8_time - f30);
  }

  if (x1ec_flags & 0x2) {
    x1d4_pos = newPos;
    ret = x188_spline.GetInterpolatedSplinePointByLength(x1d4_pos);
  } else {
    if (x188_spline.IsClosedLoop()) {
      float absDelta = std::fabs(newPos - x1d4_pos);
      absDelta = std::min(absDelta, x188_spline.GetLength() - absDelta);
      float tBias = zeus::clamp(-1.f, absDelta / x1e4_filterProportion, 1.f) * x1e0_filterMag * t;
      float tmpAbs = std::fabs(x1d4_pos - newPos);
      float absDelta2 = x188_spline.GetLength() - tmpAbs;
      if (x1d4_pos > newPos) {
        if (tmpAbs <= absDelta2)
          tBias *= -1.f;
      } else {
        if (tmpAbs > absDelta2)
          tBias *= -1.f;
      }
      x1d4_pos = x188_spline.ValidateLength(x1d4_pos + tBias);
    } else {
      x1d4_pos = x188_spline.ValidateLength(
          zeus::clamp(-1.f, (newPos - x1d4_pos) / x1e4_filterProportion, 1.f) * x1e0_filterMag * t + x1d4_pos);
    }
    ret = x188_spline.GetInterpolatedSplinePointByLength(x1d4_pos);
  }

  return ret;
}

void CPathCamera::ClampToClosedDoor(CStateManager& mgr) {
  if (TCastToConstPtr<CScriptDoor> door =
          mgr.GetObjectById(mgr.GetCameraManager()->GetBallCamera()->GetTooCloseActorId())) {
    if (!door->IsOpen() && CBallCamera::IsBallNearDoor(GetTranslation(), mgr)) {
      x1d4_pos = (x1d4_pos > x1d8_time) ? x1d8_time - x1dc_lengthExtent : x1d8_time + x1dc_lengthExtent;
      SetTranslation(x188_spline.GetInterpolatedSplinePointByLength(x1d4_pos).origin);
    }
  }
}

} // namespace urde