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89 lines
3.8 KiB
89 lines
3.8 KiB
#pragma once
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#include <base/subface.hpp>
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#include <process.hpp>
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#include <container/stl_alias.hpp>
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#include <container/wrapper/flat_index_group.hpp>
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namespace internal
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{
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/**
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* @brief Numerical integrator for parametric surfaces with trimming curves.
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*
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* This class computes integrals (e.g., area, mass, etc.) over trimmed parametric surfaces
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* by subdividing the parameter domain and applying Gaussian quadrature.
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*
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* The integrator does not own the input data; it holds const references to ensure zero-copy semantics.
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* Users must ensure that the lifetime of input data exceeds that of the integrator.
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*/
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class SI_API integrator_t
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{
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public:
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/**
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* @note This constructor does not copy the data; it stores const references.
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* The caller is responsible for ensuring the validity of the referenced data
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* throughout the lifetime of this integrator.
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*/
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integrator_t(const stl_vector_mp<object_with_index_mapping<subface>>& surfaces,
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const flat_hash_map_mp<uint32_t, parametric_plane_t>& uv_planes)
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: m_subfaces(surfaces), m_uv_planes(uv_planes)
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{
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std::cout << "Integrator initialized with " << surfaces.size() << " subfaces." << std::endl;
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std::cout << "m_uv_planes size: " << m_uv_planes.size() << std::endl;
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}
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/// Default destructor
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~integrator_t() = default;
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double calculate(int gauss_order,
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double (*func)(double u,
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double v,
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const Eigen::Vector3d& p,
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const Eigen::Vector3d& dU,
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const Eigen::Vector3d& dV)) const;
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double calculate_one_subface(const subface& subface,
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const parametric_plane_t& param_plane,
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int gauss_order,
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double (*func)(double u,
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double v,
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const Eigen::Vector3d& p,
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const Eigen::Vector3d& dU,
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const Eigen::Vector3d& dV)) const;
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private:
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/// Non-owning reference to the list of subfaces
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const stl_vector_mp<object_with_index_mapping<subface>>& m_subfaces;
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/// Non-owning reference to the map of parametric planes (ID -> parametric_plane_t)
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const flat_hash_map_mp<uint32_t, parametric_plane_t>& m_uv_planes;
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stl_vector_mp<double> compute_u_breaks(const parametric_plane_t& param_plane, double u_min, double u_max) const;
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stl_vector_mp<double> find_v_intersections_at_u(const subface& subface,
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const parametric_plane_t& param_plane,
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double u_val) const;
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bool is_point_inside_domain(const subface& subface, const parametric_plane_t& param_plane, double u, double v) const;
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bool is_u_near_singularity(double u, double tol = 1e-6) const;
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void sort_and_unique_with_tol(stl_vector_mp<double>& vec, double epsilon = 1e-8) const;
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};
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double newton_method(const std::function<implicit_equation_intermediate(double)>& F,
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double v_initial,
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double tolerance = 1e-8,
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int max_iterations = 100);
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double area_integrand(double u, double v, const Eigen::Vector3d& p, const Eigen::Vector3d& dU, const Eigen::Vector3d& dV)
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{
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return 1.0;
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}
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} // namespace internal
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