/usr/include/libwildmagic/Wm5Distance.h is in libwildmagic-dev 5.13-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | // 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)
#ifndef WM5DISTANCE_H
#define WM5DISTANCE_H
#include "Wm5MathematicsLIB.h"
#include "Wm5Vector2.h"
#include "Wm5Vector3.h"
namespace Wm5
{
template <typename Real, typename TVector>
class WM5_MATHEMATICS_ITEM Distance
{
public:
// Abstract base class.
virtual ~Distance ();
// Static distance queries.
virtual Real Get () = 0; // distance
virtual Real GetSquared () = 0; // squared distance
// Function calculations for dynamic distance queries.
virtual Real Get (Real t, const TVector& velocity0,
const TVector& velocity1) = 0;
virtual Real GetSquared (Real fT, const TVector& velocity0,
const TVector& velocity1) = 0;
// Derivative calculations for dynamic distance queries. The defaults
// use finite difference estimates
// f'(t) = (f(t+h)-f(t-h))/(2*h)
// where h = DifferenceStep. A derived class may override these and
// provide implementations of exact formulas that do not require h.
virtual Real GetDerivative (Real t, const TVector& velocity0,
const TVector& velocity1);
virtual Real GetDerivativeSquared (Real t, const TVector& velocity0,
const TVector& velocity1);
// Dynamic distance queries. The function computes the smallest distance
// between the two objects over the time interval [tmin,tmax].
virtual Real Get (Real tmin, Real tmax, const TVector& velocity0,
const TVector& relocity1);
virtual Real GetSquared (Real fTMin, Real fTMax,
const TVector& velocity0, const TVector& velocity1);
// For Newton's method and inverse parabolic interpolation.
int MaximumIterations; // default = 8
Real ZeroThreshold; // default = Math<Real>::ZERO_TOLERANCE
// For derivative approximations.
void SetDifferenceStep (Real differenceStep); // default = 1e-03
Real GetDifferenceStep () const;
// The time at which minimum distance occurs for the dynamic queries.
Real GetContactTime () const;
// Closest points on the two objects. These are valid for static or
// dynamic queries. The set of closest points on a single object need
// not be a single point. In this case, the Boolean member functions
// return 'true'. A derived class may support querying for the full
// contact set.
const TVector& GetClosestPoint0 () const;
const TVector& GetClosestPoint1 () const;
bool HasMultipleClosestPoints0 () const;
bool HasMultipleClosestPoints1 () const;
protected:
Distance ();
Real mContactTime;
TVector mClosestPoint0;
TVector mClosestPoint1;
bool mHasMultipleClosestPoints0;
bool mHasMultipleClosestPoints1;
Real mDifferenceStep, mInvTwoDifferenceStep;
};
typedef Distance<float,Vector2f> Distance2f;
typedef Distance<float,Vector3f> Distance3f;
typedef Distance<double,Vector2d> Distance2d;
typedef Distance<double,Vector3d> Distance3d;
}
#endif
|