// Created on: 2014-05-22
// Created by: Varvara POSKONINA
// Copyright (c) 2005-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _SelectMgr_BaseFrustum_HeaderFile
#define _SelectMgr_BaseFrustum_HeaderFile

#include <SelectMgr_BaseIntersector.hxx>

//! This class is an interface for different types of selecting frustums,
//! defining different selection types, like point, box or polyline
//! selection. It contains signatures of functions for detection of
//! overlap by sensitive entity and initializes some data for building
//! the selecting frustum
class SelectMgr_BaseFrustum : public SelectMgr_BaseIntersector
{
public:

  //! Creates new selecting volume with pixel toletance set to 2,
  //! orthographic camera and empty frustum builder
  Standard_EXPORT SelectMgr_BaseFrustum();

  //! Destructor
  virtual ~SelectMgr_BaseFrustum() {}

  //! Nullifies the builder created in the constructor and copies the pointer given
  Standard_EXPORT void SetBuilder (const Handle(SelectMgr_FrustumBuilder)& theBuilder);

  //! Return camera definition.
  virtual const Handle(Graphic3d_Camera)& Camera() const Standard_OVERRIDE { return myCamera; }

  //! Passes camera projection and orientation matrices to builder
  Standard_EXPORT virtual void SetCamera (const Handle(Graphic3d_Camera)& theCamera) Standard_OVERRIDE;

  //! Passes camera projection and orientation matrices to builder
  Standard_EXPORT virtual void SetCamera (const Graphic3d_Mat4d& theProjection,
                                          const Graphic3d_Mat4d& theWorldView,
                                          const Standard_Boolean theIsOrthographic,
                                          const Graphic3d_WorldViewProjState& theWVPState = Graphic3d_WorldViewProjState()) Standard_OVERRIDE;

  //! @return current camera projection transformation common for all selecting volumes
  Standard_EXPORT virtual const Graphic3d_Mat4d& ProjectionMatrix() const Standard_OVERRIDE;

  //! @return current camera world view transformation common for all selecting volumes
  Standard_EXPORT virtual const Graphic3d_Mat4d& WorldViewMatrix() const Standard_OVERRIDE;

  //! @return current camera world view projection transformation state
  Standard_EXPORT virtual const Graphic3d_WorldViewProjState& WorldViewProjState() const Standard_OVERRIDE;

  Standard_EXPORT virtual void SetPixelTolerance (const Standard_Integer theTol) Standard_OVERRIDE;

  Standard_EXPORT virtual void SetWindowSize (const Standard_Integer theWidth,
                                              const Standard_Integer theHeight) Standard_OVERRIDE;

  Standard_EXPORT virtual void WindowSize (Standard_Integer& theWidth,
                                           Standard_Integer& theHeight) const Standard_OVERRIDE;

  //! Passes viewport parameters to builder
  Standard_EXPORT virtual void SetViewport (const Standard_Real theX,
                                            const Standard_Real theY,
                                            const Standard_Real theWidth,
                                            const Standard_Real theHeight) Standard_OVERRIDE;



  //! SAT intersection test between defined volume and given axis-aligned box
  Standard_EXPORT virtual Standard_Boolean OverlapsBox (const SelectMgr_Vec3& theBoxMin,
                                                        const SelectMgr_Vec3& theBoxMax,
                                                        const SelectMgr_ViewClipRange& theClipRange,
                                                        SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;

  //! Returns true if selecting volume is overlapped by axis-aligned bounding box
  //! with minimum corner at point theMinPt and maximum at point theMaxPt
  Standard_EXPORT virtual Standard_Boolean OverlapsBox (const SelectMgr_Vec3& theBoxMin,
                                                        const SelectMgr_Vec3& theBoxMax,
                                                        Standard_Boolean*     theInside = NULL) const Standard_OVERRIDE;

  //! Intersection test between defined volume and given point
  Standard_EXPORT virtual Standard_Boolean OverlapsPoint (const gp_Pnt& thePnt,
                                                          const SelectMgr_ViewClipRange& theClipRange,
                                                          SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;

  //! Intersection test between defined volume and given point
  //! Does not perform depth calculation, so this method is defined as
  //! helper function for inclusion test. Therefore, its implementation
  //! makes sense only for rectangular frustum with box selection mode activated.
  Standard_EXPORT virtual Standard_Boolean OverlapsPoint (const gp_Pnt& thePnt) const Standard_OVERRIDE;

  //! SAT intersection test between defined volume and given ordered set of points,
  //! representing line segments. The test may be considered of interior part or
  //! boundary line defined by segments depending on given sensitivity type
  Standard_EXPORT virtual Standard_Boolean OverlapsPolygon (const TColgp_Array1OfPnt& theArrayOfPnts,
                                                            Select3D_TypeOfSensitivity theSensType,
                                                            const SelectMgr_ViewClipRange& theClipRange,
                                                            SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;

  //! Checks if line segment overlaps selecting frustum
  Standard_EXPORT virtual Standard_Boolean OverlapsSegment (const gp_Pnt& thePnt1,
                                                            const gp_Pnt& thePnt2,
                                                            const SelectMgr_ViewClipRange& theClipRange,
                                                            SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;

  //! SAT intersection test between defined volume and given triangle. The test may
  //! be considered of interior part or boundary line defined by triangle vertices
  //! depending on given sensitivity type
  Standard_EXPORT virtual Standard_Boolean OverlapsTriangle (const gp_Pnt& thePt1,
                                                             const gp_Pnt& thePt2,
                                                             const gp_Pnt& thePt3,
                                                             Select3D_TypeOfSensitivity theSensType,
                                                             const SelectMgr_ViewClipRange& theClipRange,
                                                             SelectBasics_PickResult& thePickResult) const Standard_OVERRIDE;

  //! Dumps the content of me into the stream
  Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const Standard_OVERRIDE;

  DEFINE_STANDARD_RTTIEXT(SelectMgr_BaseFrustum, SelectMgr_BaseIntersector)

protected:
  Standard_Integer    myPixelTolerance;      //!< Pixel tolerance
  Standard_Boolean    myIsOrthographic;      //!< Defines if current camera is orthographic

  Handle(SelectMgr_FrustumBuilder) myBuilder; //!< A tool implementing methods for volume build
  Handle(Graphic3d_Camera)         myCamera;  //!< camera definition
};

#endif // _SelectMgr_BaseFrustum_HeaderFile