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1 | // Created on: 2011-10-11 |
| 2 | // Created by: Roman KOZLOV |
| 3 | // Copyright (c) 2011-2014 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 __IVTK_IVIEW_H__ |
| 17 | #define __IVTK_IVIEW_H__ |
| 18 | |
| 19 | #include <IVtk_Interface.hxx> |
| 20 | #include <gp_XY.hxx> |
| 21 | #include <gp_XYZ.hxx> |
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22 | #include <gp_Pnt.hxx> |
| 23 | #include <Graphic3d_Mat4d.hxx> |
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24 | |
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25 | class IVtk_IView; |
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26 | DEFINE_STANDARD_HANDLE( IVtk_IView, IVtk_Interface ) |
| 27 | |
| 28 | //! @class IVtk_IView |
| 29 | //! @brief Interface for obtaining view transformation parameters. |
| 30 | //! |
| 31 | //! These parameters are used by selection algorithm to compute |
| 32 | //! projections of selectable (active) 3D shapes. |
| 33 | class IVtk_IView : public IVtk_Interface |
| 34 | { |
| 35 | |
| 36 | public: |
| 37 | typedef Handle(IVtk_IView) Handle; |
| 38 | |
| 39 | //! Destructor |
| 40 | virtual ~IVtk_IView() { } |
| 41 | |
| 42 | //! @return true if this is a perspective view, and false otherwise. |
| 43 | virtual bool IsPerspective() const = 0; |
| 44 | |
| 45 | //! @return The focal distance of the view |
| 46 | virtual double GetDistance() const = 0; |
| 47 | |
| 48 | //! @return The world coordinates of the view position |
| 49 | virtual void GetPosition (double& theX, double& theY, double& theZ) const = 0; |
| 50 | |
| 51 | //! @return The "view up" direction of the view |
| 52 | virtual void GetViewUp (double& theDx, double& theDy, double& theDz) const = 0; |
| 53 | |
| 54 | //! @return The projection direction vector of this view |
| 55 | virtual void GetDirectionOfProjection (double& theDx, |
| 56 | double& theDy, |
| 57 | double& theDz) const = 0; |
| 58 | |
| 59 | //! @return Three doubles contaning scale components of the view transformation |
| 60 | virtual void GetScale (double& theX, double& theY, double& theZ) const = 0; |
| 61 | |
| 62 | //! @return The current view's zoom factor (for parallel projection) |
| 63 | virtual double GetParallelScale() const = 0; |
| 64 | |
| 65 | //! @return The current view angle (for perspective projection) |
| 66 | virtual double GetViewAngle() const = 0; |
| 67 | |
| 68 | //! @return Two doubles containing the display coordinates of the view window center |
| 69 | virtual void GetViewCenter (double& theX, double& theY) const = 0; |
| 70 | |
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71 | //! Gets window size in screen coordinates in pixels |
| 72 | virtual void GetWindowSize (int& theX, int& theY) const = 0; |
| 73 | |
| 74 | //! Gets camera projection and orientation matrices |
| 75 | virtual void GetCamera (Graphic3d_Mat4d& theProj, |
| 76 | Graphic3d_Mat4d& theOrient, |
| 77 | Standard_Boolean& theIsOrtho) const = 0; |
| 78 | |
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79 | //! Converts 3D display coordinates into 3D world coordinates. |
| 80 | //! @param [in] theDisplayPnt 2d point of display coordinates |
| 81 | //! @param [out] theWorldPnt 3d point of world coordinates |
| 82 | //! @return true if conversion was successful, false otherwise |
| 83 | virtual bool DisplayToWorld (const gp_XY& theDisplayPnt, gp_XYZ& theWorldPnt) const = 0; |
| 84 | |
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85 | //! Gets viewport coordinates |
| 86 | virtual void GetViewport (Standard_Real& theX, |
| 87 | Standard_Real& theY, |
| 88 | Standard_Real& theWidth, |
| 89 | Standard_Real& theHeight) const = 0; |
| 90 | |
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91 | DEFINE_STANDARD_RTTI(IVtk_IView, IVtk_Interface) |
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92 | }; |
| 93 | |
| 94 | #endif // __IVTK_IVIEW_H__ |
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