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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 | |
| 19 | #include <Graphic3d_Camera.hxx> |
| 20 | #include <NCollection_Handle.hxx> |
| 21 | #include <Precision.hxx> |
| 22 | #include <SelectMgr_VectorTypes.hxx> |
| 23 | |
| 24 | //! The purpose of this class is to provide unified interface for building |
| 25 | //! selecting frustum depending on current camera projection and orientation |
| 26 | //! matrices, window size and viewport parameters. |
| 27 | class SelectMgr_FrustumBuilder |
| 28 | { |
| 29 | public: |
| 30 | //! Creates new frustum builder with empty matrices |
| 31 | SelectMgr_FrustumBuilder(); |
| 32 | |
| 33 | ~SelectMgr_FrustumBuilder() {}; |
| 34 | |
| 35 | //! Stores current orientation matrix |
| 36 | void SetOrientation (const Graphic3d_Mat4d& theOrientation); |
| 37 | |
| 38 | //! Stores current projection matrix |
| 39 | void SetProjection (const Graphic3d_Mat4d& theProjection); |
| 40 | |
| 41 | //! Stores current window width and height |
| 42 | void SetWindowSize (const Standard_Integer theWidth, |
| 43 | const Standard_Integer theHeight); |
| 44 | |
| 45 | //! Stores current viewport coordinates |
| 46 | void SetViewport (const Standard_Real theX, |
| 47 | const Standard_Real theY, |
| 48 | const Standard_Real theWidth, |
| 49 | const Standard_Real theHeight); |
| 50 | |
| 51 | void InvalidateViewport(); |
| 52 | |
| 53 | //! Calculates signed distance between plane with equation |
| 54 | //! theEq and point thePnt |
| 55 | Standard_Real SignedPlanePntDist (const SelectMgr_Vec3& theEq, |
| 56 | const SelectMgr_Vec3& thePnt) const; |
| 57 | |
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58 | //! Projects 2d screen point onto view frustum plane: |
| 59 | //! theZ = 0 - near plane, |
| 60 | //! theZ = 1 - far plane |
| 61 | SelectMgr_Vec3 ProjectPntOnViewPlane (const Standard_Real& theX, |
| 62 | const Standard_Real& theY, |
| 63 | const Standard_Real& theZ) const; |
| 64 | |
| 65 | private: |
| 66 | |
| 67 | //! Unprojects point from NDC coords to 3d world space |
| 68 | SelectMgr_Vec3 unProject (const gp_Pnt& thePnt) const; |
| 69 | |
| 70 | private: |
| 71 | |
| 72 | Graphic3d_Mat4d myOrientation; |
| 73 | Graphic3d_Mat4d myProjection; |
| 74 | Standard_Integer myWidth; |
| 75 | Standard_Integer myHeight; |
| 76 | NCollection_Vec4<Standard_Real> myViewport; |
| 77 | Standard_Boolean myIsViewportSet; |
| 78 | }; |
| 79 | |
| 80 | #endif // _SelectMgr_FrustumBuilder_HeaderFile |
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