1 /* Copyright (C) 2011 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 <boost/unordered_map.hpp>
26 
27 class SceneCollector;
28 
29 class CParticleManager
30 {
31 public:
32 	CParticleManager();
33 	~CParticleManager();
34 
35 	CParticleEmitterTypePtr LoadEmitterType(const VfsPath& path);
36 
37 	/**
38 	 * Tell the manager to handle rendering of an emitter that is no longer
39 	 * attached to a unit.
40 	 */
41 	void AddUnattachedEmitter(const CParticleEmitterPtr& emitter);
42 
43 	/**
44 	 * Delete unattached emitters if we don't wish to see them anymore (like in actor viewer)
45 	 */
46 	void ClearUnattachedEmitters();
47 
48 	void RenderSubmit(SceneCollector& collector, const CFrustum& frustum);
49 
50 	void Interpolate(const float simFrameLength);
51 
GetCurrentTime()52 	float GetCurrentTime() const { return m_CurrentTime; }
53 
54 	Status ReloadChangedFile(const VfsPath& path);
55 
56 	/// Random number generator shared between all particle emitters.
57 	boost::mt19937 m_RNG;
58 
59 private:
60 	float m_CurrentTime;
61 
62 	std::list<CParticleEmitterPtr> m_UnattachedEmitters;
63 
64 	boost::unordered_map<VfsPath, CParticleEmitterTypePtr> m_EmitterTypes;
65 };
66 
67 #endif // INCLUDED_PARTICLEMANAGER
68