source/graphics/ParticleManager.h

   1 /* Copyright (C) 2019 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef INCLUDED_PARTICLEMANAGER
  19 #define INCLUDED_PARTICLEMANAGER
  20
  21 #include "graphics/ParticleEmitter.h"
  22 #include "graphics/ParticleEmitterType.h"
  23
  24 #include <boost/random/mersenne_twister.hpp>
  25 #include <list>
  26 #include <unordered_map>
  27
  28 class SceneCollector;
  29
  30 class CParticleManager
  31 {
  32 public:
  33         CParticleManager();
  34         ~CParticleManager();
  35
  36         CParticleEmitterTypePtr LoadEmitterType(const VfsPath& path);
  37
  38         /**
  39          * Tell the manager to handle rendering of an emitter that is no longer
  40          * attached to a unit.
  41          */
  42         void AddUnattachedEmitter(const CParticleEmitterPtr& emitter);
  43
  44         /**
  45          * Delete unattached emitters if we don't wish to see them anymore (like in actor viewer)
  46          */
  47         void ClearUnattachedEmitters();
  48
  49         void RenderSubmit(SceneCollector& collector, const CFrustum& frustum);
  50
  51         void Interpolate(const float simFrameLength);
  52
  53         float GetCurrentTime() const { return m_CurrentTime; }
  54
  55         Status ReloadChangedFile(const VfsPath& path);
  56
  57         /// Random number generator shared between all particle emitters.
  58         boost::mt19937 m_RNG;
  59
  60 private:
  61         float m_CurrentTime;
  62
  63         std::list<CParticleEmitterPtr> m_UnattachedEmitters;
  64
  65         std::unordered_map<VfsPath, CParticleEmitterTypePtr> m_EmitterTypes;
  66 };
  67
  68 #endif // INCLUDED_PARTICLEMANAGER