/usr/include/libwildmagic/Wm5IntpQdrNonuniform2.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: 5.0.1 (2010/10/01)
#ifndef WM5INTPQUADRATICNONUNIFORM2_H
#define WM5INTPQUADRATICNONUNIFORM2_H
// Quadratic interpolation of a network of triangles whose vertices are of
// the form (x,y,f(x,y)). This code is an implementation of the algorithm
// found in
//
// Zoltan J. Cendes and Steven H. Wong,
// C1 quadratic interpolation over arbitrary point sets,
// IEEE Computer Graphics & Applications,
// pp. 8-16, 1987
#include "Wm5MathematicsLIB.h"
#include "Wm5Delaunay2.h"
namespace Wm5
{
template <typename Real>
class WM5_MATHEMATICS_ITEM IntpQdrNonuniform2
{
public:
// Construction and destruction. If you want IntpQdrNonuniform2 to
// delete the input array during destruction, set owner to 'true'.
// Otherwise, you own the array and must delete it yourself.
//
// The first constructor requires you to specify function values F and
// first-order partial derivative values Fx and Fy. The second
// constructor requires only F, but the Fx and Fy values are estimated
// at the sample points.
IntpQdrNonuniform2 (const Delaunay2<Real>& DT, Real* F, Real* FX,
Real* FY, bool owner);
IntpQdrNonuniform2 (const Delaunay2<Real>& DT, Real* F, bool owner);
~IntpQdrNonuniform2 ();
// Quadratic interpolation. The return value is 'true' if and only if the
// input point is in the convex hull of the input vertices, in which case
// the interpolation is valid.
bool Evaluate (const Vector2<Real>& P, Real& F, Real& FX, Real& FY);
private:
class TriangleData
{
public:
Vector2<Real> Center;
Vector2<Real> Intersect[3];
Real Coeff[19];
};
class Jet
{
public:
Real F, FX, FY;
};
const Delaunay2<Real>* mDT;
Real* mF;
Real* mFX;
Real* mFY;
TriangleData* mTData; // triangle data
bool mFOwner, mFXFYOwner;
void EstimateDerivatives ();
void ProcessTriangles ();
void ComputeCrossEdgeIntersections (int t);
void ComputeCoefficients (int t);
};
typedef IntpQdrNonuniform2<float> IntpQdrNonuniform2f;
typedef IntpQdrNonuniform2<double> IntpQdrNonuniform2d;
}
#endif
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