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1 | // Created on: 1997-02-10 |
| 2 | // Created by: Alexander BRIVIN |
| 3 | // Copyright (c) 1997-1999 Matra Datavision |
| 4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
| 5 | // |
| 6 | // This file is part of Open CASCADE Technology software library. |
| 7 | // |
| 8 | // This library is free software; you can redistribute it and/or modify it under |
| 9 | // the terms of the GNU Lesser General Public License version 2.1 as published |
| 10 | // by the Free Software Foundation, with special exception defined in the file |
| 11 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 12 | // distribution for complete text of the license and disclaimer of any warranty. |
| 13 | // |
| 14 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 15 | // commercial license or contractual agreement. |
| 16 | |
| 17 | #ifndef _Vrml_LOD_HeaderFile |
| 18 | #define _Vrml_LOD_HeaderFile |
| 19 | |
| 20 | #include <Standard.hxx> |
| 21 | #include <Standard_Type.hxx> |
| 22 | |
| 23 | #include <TColStd_HArray1OfReal.hxx> |
| 24 | #include <gp_Vec.hxx> |
| 25 | #include <Standard_Boolean.hxx> |
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26 | #include <Standard_Transient.hxx> |
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27 | #include <Standard_OStream.hxx> |
| 28 | class gp_Vec; |
| 29 | |
| 30 | |
| 31 | class Vrml_LOD; |
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32 | DEFINE_STANDARD_HANDLE(Vrml_LOD, Standard_Transient) |
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33 | |
| 34 | //! defines a LOD (level of detailization) node of VRML specifying properties |
| 35 | //! of geometry and its appearance. |
| 36 | //! This group node is used to allow applications to switch between |
| 37 | //! various representations of objects automatically. The children of this |
| 38 | //! node typically represent the same object or objects at the varying |
| 39 | //! of Levels Of Detail (LOD), from highest detail to lowest. |
| 40 | //! |
| 41 | //! The specified center point of the LOD is transformed by current |
| 42 | //! transformation into world space, and yhe distancefrom the transformed |
| 43 | //! center to the world-space eye point is calculated. |
| 44 | //! If thedistance is less than the first value in the ranges array, |
| 45 | //! than the first child of the LOD group is drawn. If between |
| 46 | //! the first and second values in the range array, the second child |
| 47 | //! is drawn, etc. |
| 48 | //! If there are N values in the range array, the LOD group should |
| 49 | //! have N+1 children. |
| 50 | //! Specifying too few children will result in the last child being |
| 51 | //! used repeatedly for the lowest lewels of detail; if too many children |
| 52 | //! are specified, the extra children w ll be ignored. |
| 53 | //! Each value in the ranges array should be greater than the previous |
| 54 | //! value, otherwise results are undefined. |
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55 | class Vrml_LOD : public Standard_Transient |
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56 | { |
| 57 | |
| 58 | public: |
| 59 | |
| 60 | |
| 61 | Standard_EXPORT Vrml_LOD(); |
| 62 | |
| 63 | Standard_EXPORT Vrml_LOD(const Handle(TColStd_HArray1OfReal)& aRange, const gp_Vec& aCenter); |
| 64 | |
| 65 | Standard_EXPORT void SetRange (const Handle(TColStd_HArray1OfReal)& aRange); |
| 66 | |
| 67 | Standard_EXPORT Handle(TColStd_HArray1OfReal) Range() const; |
| 68 | |
| 69 | Standard_EXPORT void SetCenter (const gp_Vec& aCenter); |
| 70 | |
| 71 | Standard_EXPORT gp_Vec Center() const; |
| 72 | |
| 73 | Standard_EXPORT Standard_OStream& Print (Standard_OStream& anOStream) const; |
| 74 | |
| 75 | |
| 76 | |
| 77 | |
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78 | DEFINE_STANDARD_RTTIEXT(Vrml_LOD,Standard_Transient) |
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79 | |
| 80 | protected: |
| 81 | |
| 82 | |
| 83 | |
| 84 | |
| 85 | private: |
| 86 | |
| 87 | |
| 88 | Handle(TColStd_HArray1OfReal) myRange; |
| 89 | gp_Vec myCenter; |
| 90 | Standard_Boolean myRangeFlag; |
| 91 | |
| 92 | |
| 93 | }; |
| 94 | |
| 95 | |
| 96 | |
| 97 | |
| 98 | |
| 99 | |
| 100 | |
| 101 | #endif // _Vrml_LOD_HeaderFile |
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