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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: 5.0.2 (2012/11/22)
#include "Wm5MathematicsPCH.h"
#include "Wm5DistSegment3Triangle3.h"
#include "Wm5DistLine3Triangle3.h"
#include "Wm5DistPoint3Triangle3.h"
namespace Wm5
{
//----------------------------------------------------------------------------
template <typename Real>
DistSegment3Triangle3<Real>::DistSegment3Triangle3 (
const Segment3<Real>& rkSegment, const Triangle3<Real>& rkTriangle)
:
mSegment(&rkSegment),
mTriangle(&rkTriangle)
{
}
//----------------------------------------------------------------------------
template <typename Real>
const Segment3<Real>& DistSegment3Triangle3<Real>::GetSegment () const
{
return *mSegment;
}
//----------------------------------------------------------------------------
template <typename Real>
const Triangle3<Real>& DistSegment3Triangle3<Real>::GetTriangle () const
{
return *mTriangle;
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Triangle3<Real>::Get ()
{
return Math<Real>::Sqrt(GetSquared());
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Triangle3<Real>::GetSquared ()
{
Line3<Real> line(mSegment->Center, mSegment->Direction);
DistLine3Triangle3<Real> queryLT(line, *mTriangle);
Real sqrDist = queryLT.GetSquared();
mSegmentParameter = queryLT.GetLineParameter();
if (mSegmentParameter >= -mSegment->Extent)
{
if (mSegmentParameter <= mSegment->Extent)
{
mClosestPoint0 = queryLT.GetClosestPoint0();
mClosestPoint1 = queryLT.GetClosestPoint1();
mTriangleBary[0] = queryLT.GetTriangleBary(0);
mTriangleBary[1] = queryLT.GetTriangleBary(1);
mTriangleBary[2] = queryLT.GetTriangleBary(2);
}
else
{
mClosestPoint0 = mSegment->P1;
DistPoint3Triangle3<Real> queryPT(mClosestPoint0, *mTriangle);
sqrDist = queryPT.GetSquared();
mClosestPoint1 = queryPT.GetClosestPoint1();
mSegmentParameter = mSegment->Extent;
mTriangleBary[0] = queryPT.GetTriangleBary(0);
mTriangleBary[1] = queryPT.GetTriangleBary(1);
mTriangleBary[2] = queryPT.GetTriangleBary(2);
}
}
else
{
mClosestPoint0 = mSegment->P0;
DistPoint3Triangle3<Real> queryPT(mClosestPoint0, *mTriangle);
sqrDist = queryPT.GetSquared();
mClosestPoint1 = queryPT.GetClosestPoint1();
mSegmentParameter = -mSegment->Extent;
mTriangleBary[0] = queryPT.GetTriangleBary(0);
mTriangleBary[1] = queryPT.GetTriangleBary(1);
mTriangleBary[2] = queryPT.GetTriangleBary(2);
}
return sqrDist;
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Triangle3<Real>::Get (Real t,
const Vector3<Real>& velocity0, const Vector3<Real>& velocity1)
{
Vector3<Real> movedCenter = mSegment->Center + t*velocity0;
Vector3<Real> movedV0 = mTriangle->V[0] + t*velocity1;
Vector3<Real> movedV1 = mTriangle->V[1] + t*velocity1;
Vector3<Real> movedV2 = mTriangle->V[2] + t*velocity1;
Segment3<Real> movedSeg(movedCenter, mSegment->Direction,
mSegment->Extent);
Triangle3<Real> movedTriangle(movedV0, movedV1, movedV2);
return DistSegment3Triangle3<Real>(movedSeg, movedTriangle).Get();
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Triangle3<Real>::GetSquared (Real t,
const Vector3<Real>& velocity0, const Vector3<Real>& velocity1)
{
Vector3<Real> movedCenter = mSegment->Center + t*velocity0;
Vector3<Real> movedV0 = mTriangle->V[0] + t*velocity1;
Vector3<Real> movedV1 = mTriangle->V[1] + t*velocity1;
Vector3<Real> movedV2 = mTriangle->V[2] + t*velocity1;
Segment3<Real> movedSeg(movedCenter, mSegment->Direction,
mSegment->Extent);
Triangle3<Real> movedTriangle(movedV0, movedV1, movedV2);
return DistSegment3Triangle3<Real>(movedSeg, movedTriangle).GetSquared();
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Triangle3<Real>::GetSegmentParameter () const
{
return mSegmentParameter;
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistSegment3Triangle3<Real>::GetTriangleBary (int i) const
{
return mTriangleBary[i];
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Explicit instantiation.
//----------------------------------------------------------------------------
template WM5_MATHEMATICS_ITEM
class DistSegment3Triangle3<float>;
template WM5_MATHEMATICS_ITEM
class DistSegment3Triangle3<double>;
//----------------------------------------------------------------------------
}
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