CinematicMgr.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "CinematicMgr.h"
#include "Containers.h"
#include "DB2Structure.h"
#include "M2Stores.h"
#include "Map.h"
#include "MotionMaster.h"
#include "Player.h"
#include "TemporarySummon.h"
 
CinematicMgr::CinematicMgr(Player* playerref)
{
 player = playerref;
 m_cinematicDiff = 0;
 m_lastCinematicCheck = 0;
 m_activeCinematic = nullptr;
 m_activeCinematicCameraIndex = -1;
 m_cinematicLength = 0;
 m_cinematicCamera = nullptr;
 m_remoteSightPosition = Position(0.0f, 0.0f, 0.0f);
 m_CinematicObject = nullptr;
}
 
CinematicMgr::~CinematicMgr()
{
 if (m_cinematicCamera && m_activeCinematic)
 EndCinematic();
}
 
void CinematicMgr::NextCinematicCamera()
{
 // Sanity check for active camera set
 if (!m_activeCinematic || m_activeCinematicCameraIndex >= int32(std::size(m_activeCinematic->Camera)))
 return;
 
 uint32 cinematicCameraId = m_activeCinematic->Camera[++m_activeCinematicCameraIndex];
 if (!cinematicCameraId)
 return;
 
 if (std::vector<FlyByCamera> const* flyByCameras = GetFlyByCameras(cinematicCameraId))
 {
 // Initialize diff, and set camera
 m_cinematicDiff = 0;
 m_cinematicCamera = flyByCameras;
 
 if (!m_cinematicCamera->empty())
 {
 FlyByCamera const& firstCamera = m_cinematicCamera->front();
 Position const& pos = firstCamera.locations;
 if (!pos.IsPositionValid())
 return;
 
 player->GetMap()->LoadGridForActiveObject(pos.GetPositionX(), pos.GetPositionY(), player);
 m_CinematicObject = player->SummonCreature(VISUAL_WAYPOINT, pos.m_positionX, pos.m_positionY, pos.m_positionZ, 0.0f, TEMPSUMMON_TIMED_DESPAWN, 5min);
 if (m_CinematicObject)
 {
 m_CinematicObject->setActive(true);
 player->SetViewpoint(m_CinematicObject, true);
 }
 
 // Get cinematic length
 m_cinematicLength = m_cinematicCamera->back().timeStamp;
 }
 }
}
 
void CinematicMgr::EndCinematic()
{
 if (!m_activeCinematic)
 return;
 
 m_cinematicDiff = 0;
 m_cinematicCamera = nullptr;
 m_activeCinematic = nullptr;
 m_activeCinematicCameraIndex = -1;
 if (m_CinematicObject)
 {
 if (WorldObject* vpObject = player->GetViewpoint())
 if (vpObject == m_CinematicObject)
 player->SetViewpoint(m_CinematicObject, false);
 
 m_CinematicObject->AddObjectToRemoveList();
 }
}
 
void CinematicMgr::UpdateCinematicLocation(uint32 /*diff*/)
{
 if (!m_activeCinematic || m_activeCinematicCameraIndex == -1 || !m_cinematicCamera || m_cinematicCamera->size() == 0)
 return;
 
 Position lastPosition;
 uint32 lastTimestamp = 0;
 Position nextPosition;
 uint32 nextTimestamp = 0;
 
 // Obtain direction of travel
 for (FlyByCamera const& cam : *m_cinematicCamera)
 {
 if (cam.timeStamp > m_cinematicDiff)
 {
 nextPosition.Relocate(cam.locations);
 nextTimestamp = cam.timeStamp;
 break;
 }
 lastPosition.Relocate(cam.locations);
 lastTimestamp = cam.timeStamp;
 }
 float angle = lastPosition.GetAbsoluteAngle(&nextPosition);
 angle -= lastPosition.GetOrientation();
 if (angle < 0)
 angle += 2 * float(M_PI);
 
 // Look for position around 2 second ahead of us.
 int32 workDiff = m_cinematicDiff;
 
 // Modify result based on camera direction (Humans for example, have the camera point behind)
 workDiff += static_cast<int32>(float(CINEMATIC_LOOKAHEAD) * cos(angle));
 
 // Get an iterator to the last entry in the cameras, to make sure we don't go beyond the end
 auto endItr = m_cinematicCamera->rbegin();
 if (endItr != m_cinematicCamera->rend() && workDiff > static_cast<int32>(endItr->timeStamp))
 workDiff = endItr->timeStamp;
 
 // Never try to go back in time before the start of cinematic!
 if (workDiff < 0)
 workDiff = m_cinematicDiff;
 
 // Obtain the previous and next waypoint based on timestamp
 for (FlyByCamera const& cam : *m_cinematicCamera)
 {
 if (static_cast<int32>(cam.timeStamp) >= workDiff)
 {
 nextPosition.Relocate(cam.locations);
 nextTimestamp = cam.timeStamp;
 break;
 }
 lastPosition.Relocate(cam.locations);
 lastTimestamp = cam.timeStamp;
 }
 
 // Never try to go beyond the end of the cinematic
 if (workDiff > static_cast<int32>(nextTimestamp))
 workDiff = static_cast<int32>(nextTimestamp);
 
 // Interpolate the position for this moment in time (or the adjusted moment in time)
 uint32 timeDiff = nextTimestamp - lastTimestamp;
 uint32 interDiff = workDiff - lastTimestamp;
 float xDiff = nextPosition.m_positionX - lastPosition.m_positionX;
 float yDiff = nextPosition.m_positionY - lastPosition.m_positionY;
 float zDiff = nextPosition.m_positionZ - lastPosition.m_positionZ;
 Position interPosition(lastPosition.m_positionX + (xDiff * (float(interDiff) / float(timeDiff))), lastPosition.m_positionY +
 (yDiff * (float(interDiff) / float(timeDiff))), lastPosition.m_positionZ + (zDiff * (float(interDiff) / float(timeDiff))));
 
 // Advance (at speed) to this position. The remote sight object is used
 // to send update information to player in cinematic
 if (m_CinematicObject && interPosition.IsPositionValid())
 m_CinematicObject->MonsterMoveWithSpeed(interPosition.m_positionX, interPosition.m_positionY, interPosition.m_positionZ, 500.0f, false, true);
 
 // If we never received an end packet 10 seconds after the final timestamp then force an end
 if (m_cinematicDiff > m_cinematicLength + 10 * IN_MILLISECONDS)
 EndCinematic();
}