#include "trenderer.h"

#include <qmutexlocker></qmutexlocker>

#include "particlesmanager.h"

/*

EXPLANATION:

ParticlesManager improves the old particles system as follows - the particles

manager stores the

last particles configuration which had some particle rendered by a thread.

Under normal cicumstances, this means that every thread has the particles

configuration that rendered

last. In case a trail was set, such frame is that beyond the trail.

This managemer works well on the assumption that each thread builds particle in

an incremental timeline.

*/

//--------------------------------------------------------------------------------------------------

DEFINE_CLASS_CODE(ParticlesManager::FxData, 110)

//--------------------------------------------------------------------------------------------------

typedef std::map<double, particlesmanager::framedata=""> FramesMap;</double,>

//************************************************************************************************

//    Preliminaries

//************************************************************************************************

class ParticlesManagerGenerator final : public TRenderResourceManagerGenerator {

public:

  ParticlesManagerGenerator() : TRenderResourceManagerGenerator(true) {}

  TRenderResourceManager *operator()(void) override {

    return new ParticlesManager;

  }

};

MANAGER_FILESCOPE_DECLARATION(ParticlesManager, ParticlesManagerGenerator);

//************************************************************************************************

//    FrameData implementation

//************************************************************************************************

ParticlesManager::FrameData::FrameData(FxData *fxData)

    : m_fxData(fxData)

    , m_frame((std::numeric_limits<int>::min)())</int>

    , m_calculated(false)

    , m_maxTrail(-1)

    , m_totalParticles(0) {

  m_fxData->addRef();

}

//-------------------------------------------------------------------------

ParticlesManager::FrameData::~FrameData() { m_fxData->release(); }

//-------------------------------------------------------------------------

void ParticlesManager::FrameData::buildMaxTrail() {

  // Store the maximum trail of each particle

  std::list<particle>::iterator it;</particle>

  for (it = m_particles.begin(); it != m_particles.end(); ++it)

    m_maxTrail = std::max(m_maxTrail, it->trail);

}

//-------------------------------------------------------------------------

void ParticlesManager::FrameData::clear() {

  m_frame = (std::numeric_limits<int>::min)();</int>

  m_particles.clear();

  m_random         = TRandom();

  m_calculated     = false;

  m_maxTrail       = -1;

  m_totalParticles = 0;

}

//************************************************************************************************

//    FxData implementation

//************************************************************************************************

ParticlesManager::FxData::FxData() : TSmartObject(m_classCode) {}

//************************************************************************************************

//    ParticlesContainer implementation

//************************************************************************************************

ParticlesManager *ParticlesManager::instance() {

  return static_cast<particlesmanager *="">(</particlesmanager>

      ParticlesManager::gen()->getManager(TRenderer::renderId()));

}

//-------------------------------------------------------------------------

ParticlesManager::ParticlesManager() : m_renderStatus(-1) {}

//-------------------------------------------------------------------------

ParticlesManager::~ParticlesManager() {

  // Release all fxDatas

  std::map<unsigned *="" fxdata="" long,="">::iterator it, end = m_fxs.end();</unsigned>

  for (it = m_fxs.begin(); it != end; ++it) it->second->release();

}

//-------------------------------------------------------------------------

void ParticlesManager::onRenderStatusStart(int renderStatus) {

  m_renderStatus = renderStatus;

}

//-------------------------------------------------------------------------

ParticlesManager::FrameData *ParticlesManager::data(unsigned long fxId) {

  QMutexLocker locker(&m_mutex);

  std::map<unsigned *="" fxdata="" long,="">::iterator it = m_fxs.find(fxId);</unsigned>

  if (it == m_fxs.end()) {

    it = m_fxs.insert(std::make_pair(fxId, new FxData)).first;

    it->second->addRef();

  }

  FxData *fxData = it->second;

  FrameData *d   = fxData->m_frames.localData();

  if (!d) {

    d = new FrameData(fxData);

    fxData->m_frames.setLocalData(d);

  }

  return d;

}