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0024623: Visualization - improve selection mechanism
Redesign of selection mechanism: - implemented 3-level BVH tree for selection; - selection now calculates in 3D space; - intersection tests were moved to SelectMgr_BaseFrustum descendants; - removed .cdl files in Select3D and .cdl related to selection in MeshVS; - SelectMgr_ViewerSelectors are now shared between local and global contexts; - transformations of sensitive entities are now stored in SelectMgr_SelectableObject only. Sensitive entities are independent from transformations, it is applied to SelectMgr_SelectingVolumeManager instance only; - connected and multiple connected interactive objects are now represented by their child objects only for SelectMgr_SelectionManager; - if interactive object has child objects, they will be stored as separate objects in SelectMgr_SelectionManager now. - test cases bugs/vis/bug24623_1, bug24623_2, bug24623_3, bug24623_4 to test performance and memory issues.
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vpa
bugmaster
143
src/SelectMgr/SelectMgr_BaseFrustum.hxx
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143
src/SelectMgr/SelectMgr_BaseFrustum.hxx
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// Created on: 2014-05-22
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// Created by: Varvara POSKONINA
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// Copyright (c) 2005-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _SelectMgr_BaseFrustum_HeaderFile
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#define _SelectMgr_BaseFrustum_HeaderFile
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#include <Bnd_Box.hxx>
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#include <gp_Pnt.hxx>
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#include <gp_Pln.hxx>
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#include <Graphic3d_Camera.hxx>
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#include <Graphic3d_ClipPlane.hxx>
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#include <Graphic3d_SequenceOfHClipPlane.hxx>
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#include <NCollection_Handle.hxx>
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#include <TColgp_HArray1OfPnt.hxx>
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#include <TColgp_Array1OfPnt2d.hxx>
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#include <Select3D_BndBox3d.hxx>
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#include <SelectMgr_FrustumBuilder.hxx>
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#include <Select3D_TypeOfSensitivity.hxx>
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#include <SelectMgr_VectorTypes.hxx>
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//! This class is an interface for different types of selecting frustums,
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//! defining different selection types, like point, box or polyline
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//! selection. It contains signatures of functions for detection of
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//! overlap by sensitive entity and initializes some data for building
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//! the selecting frustum
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class SelectMgr_BaseFrustum
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{
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public:
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//! Creates new selecting volume with pixel toletance set to 2,
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//! orthographic camera and empty frustum builder
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SelectMgr_BaseFrustum();
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virtual ~SelectMgr_BaseFrustum() {};
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//! Passes camera projection and orientation matrices to builder
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void SetCamera (const Handle(Graphic3d_Camera)& theCamera);
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//! Passes camera projection and orientation matrices to builder
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void SetCamera (const Graphic3d_Mat4d& theProjection,
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const Graphic3d_Mat4d& theOrientation,
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const Standard_Integer theIsOrthographic);
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void SetPixelTolerance (const Standard_Real theTol);
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void SetWindowSize (const Standard_Integer theWidth, const Standard_Integer theHeight);
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//! Passes viewport parameters to builder
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void SetViewport (const Standard_Real theX,
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const Standard_Real theY,
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const Standard_Real theWidth,
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const Standard_Real theHeight);
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//! Nullifies the builder created in the constructor and copies the pointer given
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void SetBuilder (const NCollection_Handle<SelectMgr_FrustumBuilder>& theBuilder);
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//! Builds volume according to the point and given pixel tolerance
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virtual void Build (const gp_Pnt2d& /*thePoint*/) {};
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//! Builds volume according to the selected rectangle
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virtual void Build (const gp_Pnt2d& /*theMinPt*/,
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const gp_Pnt2d& /*theMaxPt*/) {};
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//! Builds volume according to the triangle given
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virtual void Build (const gp_Pnt2d& /*theP1*/,
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const gp_Pnt2d& /*theP2*/,
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const gp_Pnt2d& /*theP3*/) {};
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//! Builds selecting volumes set according to polyline points
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virtual void Build (const TColgp_Array1OfPnt2d& /*thePoints*/) {};
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virtual NCollection_Handle<SelectMgr_BaseFrustum> Transform (const gp_Trsf& /*theTrsf*/) { return NULL; }
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//! SAT intersection test between defined volume and given axis-aligned box
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virtual const Standard_Boolean Overlaps (const BVH_Box<Standard_Real, 3>& theBndBox,
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Standard_Real& theDepth);
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//! Returns true if selecting volume is overlapped by axis-aligned bounding box
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//! with minimum corner at point theMinPt and maximum at point theMaxPt
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virtual const Standard_Boolean Overlaps (const SelectMgr_Vec3& theMinPt,
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const SelectMgr_Vec3& theMaxPt);
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//! Intersection test between defined volume and given point
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virtual const Standard_Boolean Overlaps (const gp_Pnt& thePt,
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Standard_Real& theDepth);
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//! SAT intersection test between defined volume and given ordered set of points,
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//! representing line segments. The test may be considered of interior part or
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//! boundary line defined by segments depending on given sensitivity type
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virtual const Standard_Boolean Overlaps (const Handle(TColgp_HArray1OfPnt)& theArrayOfPts,
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Select3D_TypeOfSensitivity theSensType,
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Standard_Real& theDepth);
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//! Checks if line segment overlaps selecting frustum
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virtual const Standard_Boolean Overlaps (const gp_Pnt& thePt1,
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const gp_Pnt& thePt2,
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Standard_Real& theDepth);
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//! SAT intersection test between defined volume and given triangle. The test may
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//! be considered of interior part or boundary line defined by triangle vertices
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//! depending on given sensitivity type
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virtual const Standard_Boolean Overlaps (const gp_Pnt& thePt1,
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const gp_Pnt& thePt2,
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const gp_Pnt& thePt3,
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Select3D_TypeOfSensitivity theSensType,
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Standard_Real& theDepth);
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//! Measures distance between 3d projection of user-picked
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//! screen point and given point theCOG
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virtual const Standard_Real DistToGeometryCenter (const gp_Pnt& theCOG);
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virtual SelectMgr_Vec3 DetectedPoint (const Standard_Real theDepth) const;
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//! Checks if the point of sensitive in which selection was detected belongs
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//! to the region defined by clipping planes
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virtual const Standard_Boolean IsClipped (const Graphic3d_SequenceOfHClipPlane& thePlanes,
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const Standard_Real theDepth);
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protected:
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Standard_Real myPixelTolerance; //!< Pixel tolerance
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Standard_Boolean myIsOrthographic; //!< Defines if current camera is orthographic
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NCollection_Handle<SelectMgr_FrustumBuilder> myBuilder; //!< A tool implementing methods for volume build
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};
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#endif // _SelectMgr_BaseFrustum_HeaderFile
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