6f4fca7efb
* Replace int by size_t in for loops. * Various dtor missing and some other warning fixes. * fixed size_t vs int * fixed size_t vs int --------- Co-authored-by: Paddle <PaddleStroke@users.noreply.github.com> Co-authored-by: Aik-Siong Koh <askoh@askoh.com>
123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/***************************************************************************
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* Copyright (c) 2023 Ondsel, Inc. *
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* *
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* This file is part of OndselSolver. *
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* *
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* See LICENSE file for details about copyright. *
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***************************************************************************/
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#include <algorithm>
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#include "Polynomial.h"
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#include "Constant.h"
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#include "Sum.h"
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using namespace MbD;
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MbD::Polynomial::Polynomial(Symsptr var, std::shared_ptr<std::vector<double>> coefficients)
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{
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assert(!coefficients->empty());
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xx = var;
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std::transform(coefficients->begin(), coefficients->end(), coeffs->begin(),
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[&](auto& coeff) { return sptrConstant(coeff); }
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);
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}
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MbD::Polynomial::Polynomial(Symsptr var, std::shared_ptr<std::vector<Symsptr>> coefficients)
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{
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assert(!coefficients->empty());
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xx = var;
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coeffs->insert(coeffs->end(), coefficients->begin(), coefficients->end());
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}
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Symsptr MbD::Polynomial::expandUntil(Symsptr sptr, std::shared_ptr<std::unordered_set<Symsptr>> set)
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{
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auto newCoeffs = std::make_shared<std::vector<Symsptr>>();
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for (size_t i = 0; i < coeffs->size(); i++)
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{
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auto coeff = coeffs->at(i);
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auto newCoeff = coeff->expandUntil(coeff, set);
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newCoeffs->push_back(newCoeff);
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}
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return std::make_shared<Polynomial>(xx, newCoeffs);
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}
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Symsptr MbD::Polynomial::simplifyUntil(Symsptr sptr, std::shared_ptr<std::unordered_set<Symsptr>> set)
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{
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auto newCoeffs = std::make_shared<std::vector<Symsptr>>();
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for (size_t i = 0; i < coeffs->size(); i++)
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{
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auto coeff = coeffs->at(i);
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auto newCoeff = coeff->simplifyUntil(coeff, set);
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newCoeffs->push_back(newCoeff);
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}
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return std::make_shared<Polynomial>(xx, newCoeffs);
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}
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Symsptr MbD::Polynomial::differentiateWRTx()
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{
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//Differentiate powers
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if (coeffs->size() == 1) return sptrConstant(0.0);
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auto newCoeffs = std::make_shared<std::vector<Symsptr>>();
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for (size_t i = 1; i < coeffs->size(); i++)
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{
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auto newCoeff = i * coeffs->at(i)->getValue();
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newCoeffs->push_back(sptrConstant(newCoeff));
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}
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auto poly1 = std::make_shared<Polynomial>(xx, newCoeffs);
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//Differentiate coeffs
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auto coeffDerivs = std::make_shared<std::vector<Symsptr>>();
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std::transform(coeffs->begin(),
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coeffs->end(),
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std::back_inserter(*coeffDerivs),
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[&](auto& coeff) { return coeff->differentiateWRT(xx); }
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);
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auto poly2 = std::make_shared<Polynomial>(xx, coeffDerivs);
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return std::make_shared<Sum>(poly1, poly2);
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}
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Symsptr MbD::Polynomial::integrateWRT(Symsptr var)
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{
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assert(xx == var);
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auto newCoeffs = std::make_shared<std::vector<Symsptr>>();
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newCoeffs->push_back(sptrConstant(0.0));
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for (size_t i = 0; i < coeffs->size(); i++)
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{
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auto newCoeff = coeffs->at(i)->getValue() / (i + 1);
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newCoeffs->push_back(sptrConstant(newCoeff));
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}
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return std::make_shared<Polynomial>(var, newCoeffs);
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}
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double MbD::Polynomial::getValue()
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{
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auto xvalue = xx->getValue();
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auto xpower = 1.0;
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auto answer = 0.0;
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for (size_t i = 0; i < coeffs->size(); i++)
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{
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answer += coeffs->at(i)->getValue() * xpower;
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xpower *= xvalue;
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}
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return answer;
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}
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void MbD::Polynomial::integrationConstant(double integConstant)
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{
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auto coeff0 = coeffs->at(0);
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coeff0->setValue(coeff0->getValue() + integConstant);
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}
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std::ostream& MbD::Polynomial::printOn(std::ostream& s) const
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{
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s << "Polynomial(";
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s << *xx << ", ";
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s << "coeffs{";
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s << *coeffs->at(0);
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for (size_t i = 1; i < coeffs->size(); i++)
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{
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s << ", " << *coeffs->at(i);
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}
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s << "})";
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return s;
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}
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