IntegrationPlan.h

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/*******************************************************************************
 * Copyright (C) 2017-2026 Theodore Chang
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
#ifndef INTEGRATIONPLAN_H
#define INTEGRATIONPLAN_H
 
#include <armadillo/arma>
 
class IntegrationPlan final {
public:
    enum class Type {
        GAUSS,
        HERMITE,
        CHEBYSHEV,
        LOBATTO,
        RADAU,
        LAGUERRE,
        IRONS,
        TRIANGLE
    };
 
private:
    arma::mat int_pts;
 
    template<Type> void generate(unsigned, unsigned) { throw std::invalid_argument("not supported"); }
 
public:
    const unsigned n_rows = 0;
    const unsigned n_cols = 0;
 
    explicit IntegrationPlan(unsigned, unsigned, Type);
 
    [[nodiscard]] const arma::mat& get_data() const;
 
    double operator()(unsigned, unsigned) const;
 
    void print() const;
};
 
template<> void IntegrationPlan::generate<IntegrationPlan::Type::GAUSS>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::HERMITE>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::CHEBYSHEV>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::LOBATTO>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::RADAU>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::LAGUERRE>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::IRONS>(unsigned, unsigned);
template<> void IntegrationPlan::generate<IntegrationPlan::Type::TRIANGLE>(unsigned, unsigned);
 
#endif