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139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NL_MESH_BLOCK_MANAGER_H
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#define NL_MESH_BLOCK_MANAGER_H
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#include "nel/misc/types_nl.h"
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#include "nel/3d/mesh_geom.h"
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#include "nel/3d/vertex_buffer_heap.h"
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namespace NL3D
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{
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class CMeshBaseInstance;
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class IDriver;
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class CScene;
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class CRenderTrav;
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// ***************************************************************************
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/**
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* A class used to render instances sorted by MeshGeom first, then per material, where possible.
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* This allow optimisation because less renderState swapping are needed.
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* WARNING: if you add MeshGeom to 2 different CMeshBlockManager at same times, it won't work, and will
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* certainly crashes (not checked/assert).
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*
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* NB VBHeap part works, even if no User interface use it. It don't give greate performance Add, but will may be used.
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*
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* \author Lionel Berenguier
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* \author Nevrax France
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* \date 2002
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*/
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class CMeshBlockManager
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{
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public:
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/// Constructor
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CMeshBlockManager();
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~CMeshBlockManager();
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/** Add an instance of a MeshGeom to render. Only CMeshBaseInstance can be added.
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* For now, only CMeshGeom and CMeshMRMGeom are known to work.
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*/
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void addInstance(IMeshGeom *meshGeom, CMeshBaseInstance *inst, float polygonCount);
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/** Flush the manager and effectively render.
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*/
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void flush(IDriver *drv, CScene *scene, CRenderTrav *renderTrav);
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/// \name VBHeap part.
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// @{
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/// release all Heaps => clear memory of meshs registered.
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void releaseVBHeaps();
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/** Add a Heap for a given vertexFormat. Any meshGeom added with addInstance() which has this vertex Format
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* may fit in this heap.
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* return false and fail if the heap can't be allocated or if the heap with same vertexFormat still exist.
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*/
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bool addVBHeap(IDriver *drv, uint vertexFormat, uint maxVertices);
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/// Called by ~IMeshGeom()
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void freeMeshVBHeap(IMeshGeom *mesh);
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// @}
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// ************************
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private:
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// An instance information.
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struct CInstanceInfo
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{
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IMeshGeom *MeshGeom;
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CMeshBaseInstance *MBI;
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float PolygonCount;
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// Next instance to render in the list. -1 if end of list.
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sint32 NextInstance;
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};
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// A VBHeap information.
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struct CVBHeapBlock
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{
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/// List of instances. small realloc are performed, since same vector used each frame.
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std::vector<CInstanceInfo> RdrInstances;
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/// List of MeshGeom. small realloc are performed, since same vector used each frame.
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std::vector<IMeshGeom*> RdrMeshGeoms;
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#if 0 // todo hulud remove / restore VBHeap
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/// The actual VertexBufferHeap
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CVertexBufferHeap VBHeap;
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#endif // todo hulud remove / restore VBHeap
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/// List of MeshGeom to clear VBHeap info.
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std::vector<IMeshGeom*> AllocatedMeshGeoms;
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/// List of Id free in AllocatedMeshGeoms
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std::vector<uint> FreeIds;
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};
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/// Heap Map from vertexFormat to VBHeap Id. NB: do not contains 0th.
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typedef std::map<uint, uint> TVBHeapMap;
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TVBHeapMap _VBHeapMap;
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/** List of Heaps.
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* NB: 0th heap is special: contains all meshs which can't fit in any VBHeap.
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*/
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std::vector<CVBHeapBlock*> _VBHeapBlocks;
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/// Try to allocate a MeshGeom into a specific Heap.
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void allocateMeshVBHeap(IMeshGeom *mesh);
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// render all instance of this meshGeoms, sorting by material, VP etc....
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void render(CVBHeapBlock *hb, IMeshGeom *meshGeom, std::vector<CInstanceInfo> &rdrInstances);
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// current flush setup
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CMeshGeomRenderContext _RenderCtx;
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};
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} // NL3D
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#endif // NL_MESH_BLOCK_MANAGER_H
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/* End of mesh_block_manager.h */
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