/usr/include/libwildmagic/Wm5Plane3.inl is in libwildmagic-dev 5.13-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// 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: 5.0.0 (2010/01/01)
//----------------------------------------------------------------------------
template <typename Real>
Plane3<Real>::Plane3 ()
{
}
//----------------------------------------------------------------------------
template <typename Real>
Plane3<Real>::~Plane3 ()
{
}
//----------------------------------------------------------------------------
template <typename Real>
Plane3<Real>::Plane3 (const Vector3<Real>& normal, Real constant)
:
Normal(normal),
Constant(constant)
{
}
//----------------------------------------------------------------------------
template <typename Real>
Plane3<Real>::Plane3 (const Vector3<Real>& normal, const Vector3<Real>& p)
:
Normal(normal)
{
Constant = normal.Dot(p);
}
//----------------------------------------------------------------------------
template <typename Real>
Plane3<Real>::Plane3 (const Vector3<Real>& p0, const Vector3<Real>& p1,
const Vector3<Real>& p2)
{
Vector3<Real> edge1 = p1 - p0;
Vector3<Real> edge2 = p2 - p0;
Normal = edge1.UnitCross(edge2);
Constant = Normal.Dot(p0);
}
//----------------------------------------------------------------------------
template <typename Real>
Real Plane3<Real>::DistanceTo (const Vector3<Real>& p) const
{
return Normal.Dot(p) - Constant;
}
//----------------------------------------------------------------------------
template <typename Real>
int Plane3<Real>::WhichSide (const Vector3<Real>& p) const
{
Real distance = DistanceTo(p);
if (distance < (Real)0)
{
return -1;
}
else if (distance > (Real)0)
{
return +1;
}
else
{
return 0;
}
}
//----------------------------------------------------------------------------
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