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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.
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
// Created on: 2015-10-29
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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_LOD_Header
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#define _Graphic3d_LOD_Header
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#include <Graphic3d_Camera.hxx>
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#include <Graphic3d_SequenceOfGroup.hxx>
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#include <Graphic3d_Structure.hxx>
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#include <Standard.hxx>
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#include <Standard_Macro.hxx>
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#include <Standard_Transient.hxx>
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struct Graphic3d_RangeOfLOD
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{
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public:
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Graphic3d_RangeOfLOD (const Standard_Real theFrom, const Standard_Real theTo)
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: myTo (theTo),
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myFrom (theFrom)
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{
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Standard_ASSERT_RAISE (theFrom < theTo,
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"The upper boundary of the interval must be greater than lower one!");
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}
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Standard_Boolean IsIn (const Standard_Real theVal) const
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{
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return (myFrom < theVal) && (theVal < myTo);
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}
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Standard_Boolean IsLess (const Standard_Real theVal) const
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{
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return theVal < myFrom;
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}
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Standard_Boolean IsGreater (const Standard_Real theVal) const
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{
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return myTo < theVal;
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}
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bool operator < (const Graphic3d_RangeOfLOD& theOther) const
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{
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return myFrom < theOther.myFrom;
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}
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private:
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Standard_Real myFrom;
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Standard_Real myTo;
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};
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class Graphic3d_LOD : public Standard_Transient
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{
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public:
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Standard_EXPORT virtual ~Graphic3d_LOD();
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Standard_EXPORT void SetRange (const Standard_Real theFrom, const Standard_Real theTo);
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Standard_EXPORT const Graphic3d_RangeOfLOD& GetRange() const
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{
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return myRange;
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}
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Standard_EXPORT virtual Handle(Graphic3d_Group) NewGroup (const Handle(Graphic3d_Structure)& /*theParentStruct*/)
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{
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return NULL;
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};
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const Graphic3d_SequenceOfGroup& GetDrawGroups() const
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{
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return myGroups;
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}
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DEFINE_STANDARD_RTTIEXT (Graphic3d_LOD, Standard_Transient)
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protected:
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Standard_EXPORT Graphic3d_LOD() : myRange (-DBL_MAX, DBL_MAX) {};
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protected:
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Graphic3d_SequenceOfGroup myGroups;
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Graphic3d_RangeOfLOD myRange;
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};
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DEFINE_STANDARD_HANDLE (Graphic3d_LOD, Standard_Transient)
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#endif // _Graphic3d_LOD_Header
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