mirror of
https://gitea.wildfiregames.com/0ad/0ad.git
synced 2026-07-16 19:55:19 +00:00
Vladislav Belov
120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/* Copyright (C) 2026 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "ParticleManager.h"
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#include "ps/Filesystem.h"
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#include "ps/Profile.h"
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#include "renderer/backend/IDevice.h"
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#include "renderer/Scene.h"
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#include <algorithm>
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#include <cstddef>
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#include <memory>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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class CFrustum;
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static Status ReloadChangedFileCB(void* param, const VfsPath& path)
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{
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return static_cast<CParticleManager*>(param)->ReloadChangedFile(path);
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}
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CParticleManager::CParticleManager(Renderer::Backend::IDevice& device)
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: m_UseInstancing{device.GetCapabilities().instancing}
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{
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RegisterFileReloadFunc(ReloadChangedFileCB, this);
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}
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CParticleManager::~CParticleManager()
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{
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UnregisterFileReloadFunc(ReloadChangedFileCB, this);
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}
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CParticleEmitterType* CParticleManager::LoadEmitterType(const VfsPath& path)
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{
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if (auto it{m_EmitterTypes.find(path)}; it != m_EmitterTypes.end())
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return it->second.get();
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std::unique_ptr<CParticleEmitterType> emitterType{
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std::make_unique<CParticleEmitterType>(*this)};
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if (!emitterType->Load(path))
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return nullptr;
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return m_EmitterTypes.emplace(path, std::move(emitterType)).first->second.get();
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}
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void CParticleManager::AddUnattachedEmitter(std::unique_ptr<CParticleEmitter> emitter)
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{
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emitter->m_Active = false;
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m_UnattachedEmitters.emplace_back(std::move(emitter));
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}
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void CParticleManager::ClearUnattachedEmitters()
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{
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m_UnattachedEmitters.clear();
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}
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void CParticleManager::Interpolate(const float simFrameLength)
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{
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m_CurrentTime += simFrameLength;
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}
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struct ParticleAlive
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{
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bool operator()(const SParticle& particle) const
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{
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return particle.age < particle.maxAge;
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}
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};
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struct EmitterHasNoParticles
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{
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bool operator()(const std::unique_ptr<CParticleEmitter>& emitter) const
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{
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return std::none_of(emitter->m_Particles.begin(), emitter->m_Particles.end(), ParticleAlive{});
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}
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};
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void CParticleManager::RenderSubmit(SceneCollector& collector, const CFrustum&)
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{
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PROFILE("submit unattached particles");
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// Delete any unattached emitters that have no particles left
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std::erase_if(m_UnattachedEmitters, EmitterHasNoParticles());
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// TODO: should do some frustum culling
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for (std::unique_ptr<CParticleEmitter>& emitter : m_UnattachedEmitters)
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collector.Submit(emitter.get());
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}
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Status CParticleManager::ReloadChangedFile(const VfsPath& path)
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{
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if (auto it = m_EmitterTypes.find(path); it != m_EmitterTypes.end())
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{
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// We can't erase an emitter type because emitters might hold
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// a reference to it.
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it->second->Load(path);
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}
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return INFO::OK;
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}
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