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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 "Wm5IntrPlane3Capsule3.h"
namespace Wm5
{
//----------------------------------------------------------------------------
template <typename Real>
IntrPlane3Capsule3<Real>::IntrPlane3Capsule3 (const Plane3<Real>& plane,
const Capsule3<Real>& capsule)
:
mPlane(&plane),
mCapsule(&capsule)
{
}
//----------------------------------------------------------------------------
template <typename Real>
const Plane3<Real>& IntrPlane3Capsule3<Real>::GetPlane () const
{
return *mPlane;
}
//----------------------------------------------------------------------------
template <typename Real>
const Capsule3<Real>& IntrPlane3Capsule3<Real>::GetCapsule () const
{
return *mCapsule;
}
//----------------------------------------------------------------------------
template <typename Real>
bool IntrPlane3Capsule3<Real>::Test ()
{
Real pDist = mPlane->DistanceTo(mCapsule->Segment.P1);
Real nDist = mPlane->DistanceTo(mCapsule->Segment.P0);
if (pDist*nDist <= (Real)0)
{
// Capsule segment endpoints on opposite sides of the plane.
return true;
}
// Endpoints on same side of plane, but the endpoint spheres (with
// radius of the capsule) might intersect the plane.
return Math<Real>::FAbs(pDist) <= mCapsule->Radius
|| Math<Real>::FAbs(nDist) <= mCapsule->Radius;
}
//----------------------------------------------------------------------------
template <typename Real>
bool IntrPlane3Capsule3<Real>::CapsuleIsCulled () const
{
Real pDist = mPlane->DistanceTo(mCapsule->Segment.P1);
if (pDist < (Real)0)
{
Real nDist = mPlane->DistanceTo(mCapsule->Segment.P0);
if (nDist < (Real)0)
{
if (pDist <= nDist)
{
return pDist <= -mCapsule->Radius;
}
else
{
return nDist <= -mCapsule->Radius;
}
}
}
return false;
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Explicit instantiation.
//----------------------------------------------------------------------------
template WM5_MATHEMATICS_ITEM
class IntrPlane3Capsule3<float>;
template WM5_MATHEMATICS_ITEM
class IntrPlane3Capsule3<double>;
//----------------------------------------------------------------------------
}
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