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/* Copyright (C) 2019 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "ParticleManager.h"
#include "ps/Filesystem.h"
#include "ps/Profile.h"
#include "renderer/Scene.h"
#include <unordered_map>
static Status ReloadChangedFileCB(void* param, const VfsPath& path)
{
return static_cast<CParticleManager*>(param)->ReloadChangedFile(path);
}
CParticleManager::CParticleManager() :
m_CurrentTime(0.f)
{
RegisterFileReloadFunc(ReloadChangedFileCB, this);
}
CParticleManager::~CParticleManager()
{
UnregisterFileReloadFunc(ReloadChangedFileCB, this);
}
CParticleEmitterTypePtr CParticleManager::LoadEmitterType(const VfsPath& path)
{
std::unordered_map<VfsPath, CParticleEmitterTypePtr>::iterator it = m_EmitterTypes.find(path);
if (it != m_EmitterTypes.end())
return it->second;
CParticleEmitterTypePtr emitterType(new CParticleEmitterType(path, *this));
m_EmitterTypes[path] = emitterType;
return emitterType;
}
void CParticleManager::AddUnattachedEmitter(const CParticleEmitterPtr& emitter)
{
m_UnattachedEmitters.push_back(emitter);
}
void CParticleManager::ClearUnattachedEmitters()
{
m_UnattachedEmitters.clear();
}
void CParticleManager::Interpolate(const float simFrameLength)
{
m_CurrentTime += simFrameLength;
}
struct EmitterHasNoParticles
{
bool operator()(const CParticleEmitterPtr& emitterPtr)
{
CParticleEmitter& emitter = *emitterPtr.get();
for (size_t i = 0; i < emitter.m_Particles.size(); ++i)
{
SParticle& p = emitter.m_Particles[i];
if (p.age < p.maxAge)
return false;
}
return true;
}
};
void CParticleManager::RenderSubmit(SceneCollector& collector, const CFrustum& UNUSED(frustum))
{
PROFILE("submit unattached particles");
// Delete any unattached emitters that have no particles left
m_UnattachedEmitters.remove_if(EmitterHasNoParticles());
// TODO: should do some frustum culling
for (std::list<CParticleEmitterPtr>::iterator it = m_UnattachedEmitters.begin(); it != m_UnattachedEmitters.end(); ++it)
collector.Submit(it->get());
}
Status CParticleManager::ReloadChangedFile(const VfsPath& path)
{
m_EmitterTypes.erase(path);
return INFO::OK;
}
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