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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2010/10/01)
#include "Wm5MathematicsPCH.h"
#include "Wm5DistSegment3Box3.h"
#include "Wm5DistLine3Box3.h"
#include "Wm5DistPoint3Box3.h"
namespace Wm5
{
//----------------------------------------------------------------------------
template <typename Real>
DistSegment3Box3<Real>::DistSegment3Box3 (const Segment3<Real>& segment,
const Box3<Real>& box)
:
mSegment(&segment),
mBox(&box)
{
}
//----------------------------------------------------------------------------
template <typename Real>
const Segment3<Real>& DistSegment3Box3<Real>::GetSegment () const
{
return *mSegment;
}
//----------------------------------------------------------------------------
template <typename Real>
const Box3<Real>& DistSegment3Box3<Real>::GetBox () const
{
return *mBox;
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Box3<Real>::Get ()
{
return Math<Real>::Sqrt(GetSquared());
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Box3<Real>::GetSquared ()
{
Line3<Real> line(mSegment->Center, mSegment->Direction);
DistLine3Box3<Real> queryLB(line, *mBox);
Real sqrDistance = queryLB.GetSquared();
Real lineParameter = queryLB.GetLineParameter();
if (lineParameter >= -mSegment->Extent)
{
if (lineParameter <= mSegment->Extent)
{
mClosestPoint0 = queryLB.GetClosestPoint0();
mClosestPoint1 = queryLB.GetClosestPoint1();
}
else
{
DistPoint3Box3<Real> queryPB(mSegment->P1, *mBox);
sqrDistance = queryPB.GetSquared();
mClosestPoint0 = queryPB.GetClosestPoint0();
mClosestPoint1 = queryPB.GetClosestPoint1();
}
}
else
{
DistPoint3Box3<Real> queryPB(mSegment->P0, *mBox);
sqrDistance = queryPB.GetSquared();
mClosestPoint0 = queryPB.GetClosestPoint0();
mClosestPoint1 = queryPB.GetClosestPoint1();
}
return sqrDistance;
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Box3<Real>::Get (Real t, const Vector3<Real>& velocity0,
const Vector3<Real>& velocity1)
{
Vector3<Real> movedCenter0 = mSegment->Center + t*velocity0;
Vector3<Real> movedCenter1 = mBox->Center + t*velocity1;
Segment3<Real> movedSegment(movedCenter0, mSegment->Direction,
mSegment->Extent);
Box3<Real> movedBox(movedCenter1,mBox->Axis, mBox->Extent);
return DistSegment3Box3<Real>(movedSegment, movedBox).Get();
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Box3<Real>::GetSquared (Real t,
const Vector3<Real>& velocity0, const Vector3<Real>& velocity1)
{
Vector3<Real> movedCenter0 = mSegment->Center + t*velocity0;
Vector3<Real> movedCenter1 = mBox->Center + t*velocity1;
Segment3<Real> movedSegment(movedCenter0, mSegment->Direction,
mSegment->Extent);
Box3<Real> movedBox(movedCenter1,mBox->Axis, mBox->Extent);
return DistSegment3Box3<Real>(movedSegment, movedBox).GetSquared();
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Explicit instantiation.
//----------------------------------------------------------------------------
template WM5_MATHEMATICS_ITEM
class DistSegment3Box3<float>;
template WM5_MATHEMATICS_ITEM
class DistSegment3Box3<double>;
//----------------------------------------------------------------------------
}
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