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https://git.dev.opencascade.org/repos/occt.git
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af989e9d1d
- implemented interfaces for LOD at OpenGl, Graphic3d and MeshVS levels; - added LOD managers at Graphic3d and OpenGl levels; - simple mechanism of LOD switching is implemented in LOD manager; - distance to COG metric is temporarily used; - the metric could be redefined using custom LOD selectors; - LODs are added to MeshVS_Mesh in Compute method and are listed as its data sources; - added commands meshgenlod and meshlod to generate LODs for mesh and its topological representation and bind them to its OpenGl structures.
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
// Created on: 2015-11-25
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// Created by: Varvara POSKONINA
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// Copyright (c) 2005-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Graphic3d_LODManager_Header
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#define _Graphic3d_LODManager_Header
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#include <Graphic3d_CStructure.hxx>
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#include <Graphic3d_Camera.hxx>
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#include <Graphic3d_LOD.hxx>
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#include <Graphic3d_LODSelector.hxx>
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#include <Graphic3d_LODDistanceSelector.hxx>
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#include <Graphic3d_SequenceOfGroup.hxx>
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#include <Graphic3d_StructurePtr.hxx>
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#include <NCollection_Vector.hxx>
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#include <Standard.hxx>
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#include <Standard_Handle.hxx>
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class Graphic3d_LODManager : public Standard_Transient
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{
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public:
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Standard_EXPORT virtual ~Graphic3d_LODManager() {};
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Standard_EXPORT void SetSelector (const Handle(Graphic3d_LODSelector)& theSelector)
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{
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mySelector = theSelector;
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}
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Standard_EXPORT inline Standard_Integer NbOfDetailLevels() const
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{
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return myLODs.Size();
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}
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Standard_EXPORT void SetRange (const Standard_Integer theLodIdx,
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const Standard_Real theFrom,
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const Standard_Real theTo);
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Standard_EXPORT Standard_Integer GetCurrentLODIdx (const Handle(Graphic3d_Camera)& theCamera);
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Standard_EXPORT const Graphic3d_SequenceOfGroup& GetCurrentGroups() const;
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Standard_EXPORT virtual Handle(Graphic3d_LOD) AddNewLOD() = 0;
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DEFINE_STANDARD_RTTIEXT (Graphic3d_LODManager, Standard_Transient)
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protected:
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Standard_EXPORT Graphic3d_LODManager (const Handle(Graphic3d_Structure)& theParentStructure);
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Standard_EXPORT virtual void sortLODs() {};
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protected:
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NCollection_Vector<Handle(Graphic3d_LOD)> myLODs;
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private:
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Standard_Integer myCurrentLODIdx;
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Handle(Graphic3d_LODSelector) mySelector;
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Graphic3d_StructurePtr myStructure;
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Graphic3d_WorldViewProjState myPrevCameraState;
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};
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DEFINE_STANDARD_HANDLE (Graphic3d_LODManager, Standard_Transient)
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#endif //_Graphic3d_LODManager_Header
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