QuadraticBSpline2d.hpp

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#pragma once
 
#include "QuadraticBSpline.hpp"
 
#include <array>
#include <cassert>
 
#include <Eigen/Dense>
 
namespace polyfem
{
    namespace basis
    {
        class QuadraticBSpline2d
        {
        public:
            QuadraticBSpline2d()
            {
            }
 
            QuadraticBSpline2d(const std::array<double, 4> &knots_u, const std::array<double, 4> &knots_v)
                : spline_u_(knots_u), spline_v_(knots_v)
            {
            }
 
            void init(const std::array<double, 4> &knots_u, const std::array<double, 4> &knots_v);
 
            void interpolate(const Eigen::MatrixXd &ts, Eigen::MatrixXd &result) const;
            double interpolate(const double u, const double v) const;
 
            void derivative(const Eigen::MatrixXd &ts, Eigen::MatrixXd &result) const;
 
        private:
            QuadraticBSpline spline_u_;
            QuadraticBSpline spline_v_;
        };
    } // namespace basis
} // namespace polyfem