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57 lines
1.6 KiB
57 lines
1.6 KiB
3 months ago
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// David Eberly, Geometric Tools, Redmond WA 98052
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// Copyright (c) 1998-2021
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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// https://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
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// Version: 4.0.2019.08.13
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#pragma once
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#include <Mathematics/GVector.h>
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#include <functional>
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// The differential equation is dx/dt = F(t,x). The TVector template
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// parameter allows you to create solvers with Vector<N,Real> when the
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// dimension N is known at compile time or GVector<Real> when the dimension
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// N is known at run time. Both classes have 'int GetSize() const' that
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// allow OdeSolver-derived classes to query for the dimension.
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namespace gte
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{
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template <typename Real, typename TVector>
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class OdeSolver
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{
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public:
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// Abstract base class.
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virtual ~OdeSolver() = default;
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protected:
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OdeSolver(Real tDelta, std::function<TVector(Real, TVector const&)> const& F)
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:
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mTDelta(tDelta),
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mFunction(F)
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{
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}
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public:
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// Member access.
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inline void SetTDelta(Real tDelta)
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{
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mTDelta = tDelta;
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}
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inline Real GetTDelta() const
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{
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return mTDelta;
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}
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// Estimate x(t + tDelta) from x(t) using dx/dt = F(t,x). The
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// derived classes implement this so that it is possible for xIn and
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// xOut to be the same object.
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virtual void Update(Real tIn, TVector const& xIn, Real& tOut, TVector& xOut) = 0;
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protected:
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Real mTDelta;
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std::function<TVector(Real, TVector const&)> mFunction;
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};
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}
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