75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
// system.h
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//
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// Author: J.A. de Jong
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//
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// Description:
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// This header file describes an interface to a system of equations
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// that can be solved using a (non)linear solver.
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//////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef SYSTEM_H
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#define SYSTEM_H
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#include "tasmet_types.h"
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#include "tasmet_assert.h"
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template<typename T>
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class NoGradientNonlinearSystem{
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// A nonlinear system for which the gradient of the residual to
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// the solution vector cannot be obtained.
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public:
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virtual T residual() const=0;
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virtual T residual(const T& guess) { updateSolution(guess); return residual();}
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// Obtain an initial guess of the solution
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virtual T getSolution() const=0;
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// Create a copy of the system
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virtual NoGradientNonlinearSystem* copy() const=0;
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virtual void updateSolution(const T& new_guess)=0;
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virtual ~NoGradientNonlinearSystem(){}
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};
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// Wrapper around a vector-valued system, such that a solver for a
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// multi-dimensional system can be called for a single-DOF system
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template <typename T>
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class SingleDofNoGradient: public NoGradientNonlinearSystem<vd> {
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static_assert(is_same<T,d>::value || is_same<T,c>::value,"Instaniation must be complex or double");
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NoGradientNonlinearSystem<T>* wrapped_system = nullptr;
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public:
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SingleDofNoGradient(const NoGradientNonlinearSystem<T>& wrapped_system);
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virtual vd residual() const;
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virtual vd getSolution() const;
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// Create a copy of the system
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virtual SingleDofNoGradient<T>* copy() const;
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virtual void updateSolution(const vd& new_guess);
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~SingleDofNoGradient();
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};
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class GradientNonlinearSystem: public NoGradientNonlinearSystem<vd> {
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public:
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virtual sdmat jacobian() const=0;
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GradientNonlinearSystem* copy() const=0;
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};
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#endif // SYSTEM_H
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//////////////////////////////////////////////////////////////////////
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