/usr/include/libwildmagic/Wm5Cone3.h is in libwildmagic-dev 5.13-1+b2.
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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 WM5CONE3_H
#define WM5CONE3_H
#include "Wm5MathematicsLIB.h"
#include "Wm5Vector3.h"
namespace Wm5
{
template <typename Real>
class Cone3
{
public:
// An acute cone is Dot(A,X-V) = |X-V| cos(t) where V is the vertex, A
// is the unit-length direction of the axis of the cone, and T is the
// cone angle with 0 < t < pi/2. The cone interior is defined by the
// inequality Dot(A,X-V) >= |X-V| cos(t). Since cos(t) > 0, we can avoid
// computing square roots. The solid cone is defined by the inequality
// Dot(A,X-V)^2 >= Dot(X-V,X-V) cos(t)^2. This is an infinite,
// single-sided cone.
//
// The cone may be truncated by a plane perpendicular to its axis at a
// height h from the vertex (distance from the vertex to the intersection
// of the plane and the axis). The infinite cone has h = infinity. The
// finite cone has a disk of intersection between the plane and infinite
// cone. The radius r of the disk is r = h*tan(t).
// Construction and destruction.
Cone3 (); // uninitialized
~Cone3 ();
// The axis must be unit-length and the angle must be in (0,pi/2). For
// an infinite cone, set 'height' to Math<Real>::MAX_FLOAT.
Cone3 (const Vector3<Real>& vertex, const Vector3<Real>& axis,
const Real angle, const Real height);
// The axis must be unit-length. The pair (cosAngle,sinAngle) must be
// strictly in the first quadrant of the plane to guarantee that the
// cone angle is in (0,pi/2). For an infinite cone, set 'height' to
// Math<Real>::MAX_FLOAT.
Cone3 (const Vector3<Real>& vertex, const Vector3<Real>& axis,
const Real cosAngle, const Real sinAngle, const Real height);
Vector3<Real> Vertex, Axis;
Real CosAngle, SinAngle, Height;
};
#include "Wm5Cone3.inl"
typedef Cone3<float> Cone3f;
typedef Cone3<double> Cone3d;
}
#endif
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