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1 | // Created on: 2014-11-24 |
2 | // Created by: Varvara POSKONINA |
3 | // Copyright (c) 2005-2014 OPEN CASCADE SAS |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
7 | // This library is free software; you can redistribute it and/or modify it under |
8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
9 | // by the Free Software Foundation, with special exception defined in the file |
10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
11 | // distribution for complete text of the license and disclaimer of any warranty. |
12 | // |
13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
15 | |
16 | #ifndef _SelectMgr_FrustumBuilder_HeaderFile |
17 | #define _SelectMgr_FrustumBuilder_HeaderFile |
18 | |
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19 | #include <Standard_Type.hxx> |
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20 | |
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21 | #include <Graphic3d_Camera.hxx> |
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22 | #include <Precision.hxx> |
23 | #include <SelectMgr_VectorTypes.hxx> |
24 | |
25 | //! The purpose of this class is to provide unified interface for building |
26 | //! selecting frustum depending on current camera projection and orientation |
27 | //! matrices, window size and viewport parameters. |
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28 | class SelectMgr_FrustumBuilder : public Standard_Transient |
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29 | { |
30 | public: |
31 | //! Creates new frustum builder with empty matrices |
32 | SelectMgr_FrustumBuilder(); |
33 | |
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34 | //! Stores current orientation matrix |
35 | void SetOrientation (const Graphic3d_Mat4d& theOrientation); |
36 | |
37 | //! Stores current projection matrix |
38 | void SetProjection (const Graphic3d_Mat4d& theProjection); |
39 | |
40 | //! Stores current window width and height |
41 | void SetWindowSize (const Standard_Integer theWidth, |
42 | const Standard_Integer theHeight); |
43 | |
44 | //! Stores current viewport coordinates |
45 | void SetViewport (const Standard_Real theX, |
46 | const Standard_Real theY, |
47 | const Standard_Real theWidth, |
48 | const Standard_Real theHeight); |
49 | |
50 | void InvalidateViewport(); |
51 | |
52 | //! Calculates signed distance between plane with equation |
53 | //! theEq and point thePnt |
54 | Standard_Real SignedPlanePntDist (const SelectMgr_Vec3& theEq, |
55 | const SelectMgr_Vec3& thePnt) const; |
56 | |
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57 | //! Projects 2d screen point onto view frustum plane: |
58 | //! theZ = 0 - near plane, |
59 | //! theZ = 1 - far plane |
60 | SelectMgr_Vec3 ProjectPntOnViewPlane (const Standard_Real& theX, |
61 | const Standard_Real& theY, |
62 | const Standard_Real& theZ) const; |
63 | |
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64 | DEFINE_STANDARD_RTTI(SelectMgr_FrustumBuilder, Standard_Transient) |
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65 | |
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66 | private: |
67 | |
68 | //! Unprojects point from NDC coords to 3d world space |
69 | SelectMgr_Vec3 unProject (const gp_Pnt& thePnt) const; |
70 | |
71 | private: |
72 | |
73 | Graphic3d_Mat4d myOrientation; |
74 | Graphic3d_Mat4d myProjection; |
75 | Standard_Integer myWidth; |
76 | Standard_Integer myHeight; |
77 | NCollection_Vec4<Standard_Real> myViewport; |
78 | Standard_Boolean myIsViewportSet; |
79 | }; |
80 | |
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81 | DEFINE_STANDARD_HANDLE(SelectMgr_FrustumBuilder, Standard_Transient) |
82 | |
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83 | #endif // _SelectMgr_FrustumBuilder_HeaderFile |