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93 lines
3.7 KiB
C++
93 lines
3.7 KiB
C++
// Created on: 1995-03-13
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// Created by: Robert COUBLANC
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// Copyright (c) 1995-1999 Matra Datavision
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// Copyright (c) 1999-2014 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 _Select3D_SensitiveEntity_HeaderFile
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#define _Select3D_SensitiveEntity_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <SelectBasics_SensitiveEntity.hxx>
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#include <Handle_SelectBasics_EntityOwner.hxx>
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#include <Standard_Boolean.hxx>
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#include <Standard_Integer.hxx>
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#include <SelectMgr_SelectingVolumeManager.hxx>
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#include <Standard_Real.hxx>
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#include <Standard_OStream.hxx>
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#include <TopLoc_Location.hxx>
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class Select3D_SensitiveEntity;
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class Handle(Select3D_SensitiveEntity);
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class SelectBasics_EntityOwner;
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//! Abstract framework to define 3D sensitive entities.
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//! As the selection process uses the principle of a
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//! projection of 3D shapes onto a 2D view where
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//! nearness to a rectangle determines whether a shape
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//! is picked or not, all 3D shapes need to be converted
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//! into 2D ones in order to be selected.
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class Select3D_SensitiveEntity : public SelectBasics_SensitiveEntity
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{
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public:
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//! Originally this method intended to return sensitive
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//! entity with new location aLocation, but currently sensitive
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//! entities do not hold a location, instead HasLocation() and
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//! Location() methods call corresponding entity owner's methods.
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//! Thus all entities returned by GetConnected() share the same
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//! location propagated from corresponding selectable object.
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//! You must redefine this function for any type of
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//! sensitive entity which can accept another connected
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//! sensitive entity.//can be connected to another sensitive entity.
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Standard_EXPORT virtual Handle(Select3D_SensitiveEntity) GetConnected();
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//! Checks whether sensitive overlaps current selecting volume.
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//! Stores minimum depth, distance to center of geometry and
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//! closest point detected into thePickResult
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Standard_EXPORT virtual Standard_Boolean Matches (SelectBasics_SelectingVolumeManager& theMgr,
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SelectBasics_PickResult& thePickResult) Standard_OVERRIDE;
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//! Returns the number of sub-entities or elements in
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//! sensitive entity. Is used to determine if entity is
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//! complex and needs to pre-build BVH at the creation of
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//! sensitive entity step or is light-weighted so the tree
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//! can be build on demand with unnoticeable delay
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virtual Standard_Integer NbSubElements() = 0;
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//! Returns bounding box of a sensitive with transformation applied
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virtual Select3D_BndBox3d BoundingBox() = 0;
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//! Returns center of a sensitive with transformation applied
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virtual gp_Pnt CenterOfGeometry() const = 0;
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//! Builds BVH tree for a sensitive if needed
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Standard_EXPORT virtual void BVH() Standard_OVERRIDE;
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//! Clears up all resources and memory
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Standard_EXPORT virtual void Clear() Standard_OVERRIDE;
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DEFINE_STANDARD_RTTI(Select3D_SensitiveEntity, SelectBasics_SensitiveEntity)
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protected:
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Standard_EXPORT Select3D_SensitiveEntity (const Handle(SelectBasics_EntityOwner)& theOwnerId);
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};
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DEFINE_STANDARD_HANDLE(Select3D_SensitiveEntity, SelectBasics_SensitiveEntity)
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#endif // _Select3D_SensitiveEntity_HeaderFile
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