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43 lines
1.4 KiB
43 lines
1.4 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/OdeSolver.h>
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// The TVector template parameter allows you to create solvers with
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// Vector<N,Real> when the dimension N is known at compile time or
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// GVector<Real> when the dimension N is known at run time. Both classes
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// have 'int GetSize() const' that allow OdeSolver-derived classes to query
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// 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 OdeEuler : public OdeSolver<Real, TVector>
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{
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public:
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// Construction and destruction.
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virtual ~OdeEuler() = default;
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OdeEuler(Real tDelta, std::function<TVector(Real, TVector const&)> const& F)
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:
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OdeSolver<Real, TVector>(tDelta, F)
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{
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}
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// Estimate x(t + tDelta) from x(t) using dx/dt = F(t,x). You may
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// allow xIn and xOut to be the same object.
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virtual void Update(Real tIn, TVector const& xIn, Real& tOut, TVector& xOut) override
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{
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TVector fVector = this->mFunction(tIn, xIn);
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tOut = tIn + this->mTDelta;
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xOut = xIn + this->mTDelta * fVector;
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}
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};
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}
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