CompositeForm.cpp

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#include "CompositeForm.hpp"
#include <polyfem/State.hpp>
 
namespace polyfem::solver
{
    Eigen::MatrixXd CompositeForm::compute_reduced_adjoint_rhs(const Eigen::VectorXd &x, const State &state) const
    {
        Eigen::VectorXd composite_grad = compose_grad(get_inputs(x));
 
        Eigen::MatrixXd term;
        Eigen::VectorXd tmp_grad;
        for (int i = 0; i < forms_.size(); i++)
        {
            if (i == 0)
                term = composite_grad(i) * forms_[i]->compute_reduced_adjoint_rhs(x, state);
            else
                term += composite_grad(i) * forms_[i]->compute_reduced_adjoint_rhs(x, state);
        }
 
        return term * weight();
    }
 
    void CompositeForm::compute_partial_gradient(const Eigen::VectorXd &x, Eigen::VectorXd &gradv) const
    {
        Eigen::VectorXd composite_grad = compose_grad(get_inputs(x));
 
        gradv.setZero(x.size());
        Eigen::VectorXd tmp_grad;
        for (int i = 0; i < forms_.size(); i++)
        {
            forms_[i]->compute_partial_gradient(x, tmp_grad);
            gradv += composite_grad(i) * tmp_grad;
        }
        gradv *= weight();
    }
 
    Eigen::VectorXd CompositeForm::get_inputs(const Eigen::VectorXd &x) const
    {
        Eigen::VectorXd values;
        values.setZero(forms_.size());
 
        for (int i = 0; i < forms_.size(); i++)
            values(i) = forms_[i]->value(x);
 
        return values;
    }
 
    double CompositeForm::value_unweighted(const Eigen::VectorXd &x) const
    {
        return compose(get_inputs(x));
    }
 
    void CompositeForm::init(const Eigen::VectorXd &x)
    {
        for (const auto &f : forms_)
            f->init(x);
    }
 
    bool CompositeForm::is_step_valid(const Eigen::VectorXd &x0, const Eigen::VectorXd &x1) const
    {
        for (const auto &f : forms_)
        {
            if (f->enabled() && !f->is_step_valid(x0, x1))
                return false;
        }
        return true;
    }
 
    double CompositeForm::max_step_size(const Eigen::VectorXd &x0, const Eigen::VectorXd &x1) const
    {
        double step = 1;
        for (const auto &f : forms_)
            if (f->enabled())
                step = std::min(step, f->max_step_size(x0, x1));
 
        return step;
    }
 
    void CompositeForm::line_search_begin(const Eigen::VectorXd &x0, const Eigen::VectorXd &x1)
    {
        for (const auto &f : forms_)
            f->line_search_begin(x0, x1);
    }
 
    void CompositeForm::line_search_end()
    {
        for (const auto &f : forms_)
            f->line_search_end();
    }
 
    void CompositeForm::post_step(const polysolve::nonlinear::PostStepData &data)
    {
        for (const auto &f : forms_)
            f->post_step(data);
    }
 
    void CompositeForm::solution_changed(const Eigen::VectorXd &new_x)
    {
        AdjointForm::solution_changed(new_x);
        for (const auto &f : forms_)
            f->solution_changed(new_x);
    }
    bool CompositeForm::is_step_collision_free(const Eigen::VectorXd &x0, const Eigen::VectorXd &x1) const
    {
        for (const auto &f : forms_)
        {
            if (f->enabled() && !f->is_step_collision_free(x0, x1))
                return false;
        }
        return true;
    }
} // namespace polyfem::solver