0024623: Visualization - improve selection mechanism

[occt.git] / src / Select3D / Select3D_SensitivePoint.cxx

// Created on: 1995-03-10
// Created by: Mister rmi
// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2014 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.

#include <Select3D_SensitivePoint.hxx>

#include <TopLoc_Location.hxx>

IMPLEMENT_STANDARD_HANDLE (Select3D_SensitivePoint, Select3D_SensitiveEntity)
IMPLEMENT_STANDARD_RTTIEXT(Select3D_SensitivePoint, Select3D_SensitiveEntity)

//==================================================
// Function: Creation
// Purpose :
//==================================================
Select3D_SensitivePoint::Select3D_SensitivePoint (const Handle(SelectBasics_EntityOwner)& theOwner,
                                                  const gp_Pnt& thePoint)
: Select3D_SensitiveEntity (theOwner)
{
  SetSensitivityFactor (12.0);
  myPoint = thePoint;
}

//==================================================
// Function: Matches
// Purpose :
//==================================================
Standard_Boolean Select3D_SensitivePoint::Matches (SelectBasics_SelectingVolumeManager& theMgr,
                                                   SelectBasics_PickResult& thePickResult)
{
  Standard_Real aDepth      = RealLast();
  Standard_Real aDistToCOG  = RealLast();
  Standard_Boolean isMatched = theMgr.Overlaps (myPoint, aDepth);
  if (isMatched)
    aDistToCOG = aDepth;

  thePickResult = SelectBasics_PickResult (aDepth, aDistToCOG);

  return isMatched;
}

//=======================================================================
//function : Point
//purpose  :
//=======================================================================
gp_Pnt Select3D_SensitivePoint::Point() const
{
  return myPoint;
}

//=======================================================================
//function : GetConnected
//purpose  :
//=======================================================================
Handle(Select3D_SensitiveEntity) Select3D_SensitivePoint::GetConnected()
{
  Handle(Select3D_SensitivePoint) aNewEntity = new Select3D_SensitivePoint (myOwnerId, myPoint);
  return aNewEntity;
}

//=======================================================================
// function : CenterOfGeometry
// purpose  : Returns center of point. If location transformation
//            is set, it will be applied
//=======================================================================
gp_Pnt Select3D_SensitivePoint::CenterOfGeometry() const
{
  return myPoint;
}

//=======================================================================
// function : BoundingBox
// purpose  : Returns bounding box of the point. If location
//            transformation is set, it will be applied
//=======================================================================
Select3D_BndBox3d Select3D_SensitivePoint::BoundingBox()
{
  return Select3D_BndBox3d (SelectMgr_Vec3 (myPoint.X(), myPoint.Y(), myPoint.Z()),
                            SelectMgr_Vec3 (myPoint.X(), myPoint.Y(), myPoint.Z()));
}

//=======================================================================
// function : NbSubElements
// purpose  : Returns the amount of sub-entities in sensitive
//=======================================================================
Standard_Integer Select3D_SensitivePoint::NbSubElements()
{
  return 1;
}