/usr/include/libwildmagic/Wm5Segment3.h is in libwildmagic-dev 5.13-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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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)
#ifndef WM5SEGMENT3_H
#define WM5SEGMENT3_H
#include "Wm5MathematicsLIB.h"
#include "Wm5Vector3.h"
namespace Wm5
{
template <typename Real>
class Segment3
{
public:
// The segment is represented as (1-s)*P0+s*P1, where P0 and P1 are the
// endpoints of the segment and 0 <= s <= 1.
//
// Some algorithms involving segments might prefer a centered
// representation similar to how oriented bounding boxes are defined.
// This representation is C+t*D, where C = (P0+P1)/2 is the center of
// the segment, D = (P1-P0)/Length(P1-P0) is a unit-length direction
// vector for the segment, and |t| <= e. The value e = Length(P1-P0)/2
// is the 'extent' (or radius or half-length) of the segment.
// Construction and destruction.
Segment3 (); // uninitialized
~Segment3 ();
// The constructor computes C, D, and E from P0 and P1.
Segment3 (const Vector3<Real>& p0, const Vector3<Real>& p1);
// The constructor computes P0 and P1 from C, D, and E.
Segment3 (const Vector3<Real>& center, const Vector3<Real>& direction,
Real extent);
// Call this function when you change P0 or P1.
void ComputeCenterDirectionExtent ();
// Call this function when you change C, D, or e.
void ComputeEndPoints ();
// End-point representation.
Vector3<Real> P0, P1;
// Center-direction-extent representation.
Vector3<Real> Center;
Vector3<Real> Direction;
Real Extent;
};
#include "Wm5Segment3.inl"
typedef Segment3<float> Segment3f;
typedef Segment3<double> Segment3d;
}
#endif
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