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415 lines
22 KiB
415 lines
22 KiB
5 days ago
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#if defined(DEBUG) && not defined(RELEASE_BRANCH)
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#include <fstream>
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#include <filesystem>
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#endif
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#include <calculate_integral.hpp>
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#include <algorithm/operate_on_merged_set_intervals.hpp>
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inline uint32_t scan_interval_boarder(double l, double r, stl_vector_mp<double>& parallel_line)
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{
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std::sort(parallel_line.begin(), parallel_line.end());
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auto unique_end_iter = std::unique(parallel_line.begin(), parallel_line.end(), sorted_double_equal);
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parallel_line.erase(unique_end_iter, parallel_line.end());
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auto begin_iter =
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std::find_if(parallel_line.begin(), parallel_line.end(), [&](double x) { return x - l > strict_epsilon; });
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auto end_iter = std::find_if(parallel_line.begin(), parallel_line.end(), [&](double x) { return r - x <= strict_epsilon; });
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return std::distance(begin_iter, end_iter);
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}
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struct chain_vertex_property_t {
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uint64_t total_count : 32;
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uint64_t neg_delta_u : 8;
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uint64_t pos_delta_u : 8;
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uint64_t neg_delta_v : 8;
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uint64_t pos_delta_v : 8;
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inline chain_vertex_property_t& operator+=(const chain_vertex_property_t& x) noexcept
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{
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this->total_count += x.total_count;
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this->neg_delta_u += x.neg_delta_u;
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this->pos_delta_u += x.pos_delta_u;
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this->neg_delta_v += x.neg_delta_v;
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this->pos_delta_v += x.pos_delta_v;
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return *this;
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}
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inline chain_vertex_property_t operator~() noexcept
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{
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chain_vertex_property_t res{};
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res.total_count = this->total_count;
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res.neg_delta_u = this->pos_delta_u;
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res.pos_delta_u = this->neg_delta_u;
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res.neg_delta_v = this->pos_delta_v;
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res.pos_delta_v = this->neg_delta_v;
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return res;
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}
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};
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void calculate_integral(uint8_t q,
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const baked_blobtree_t& tree,
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const pcurve_relation_graph_t& pcurve_relation_graph,
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stl_vector_mp<stl_vector_mp<Eigen::Vector4d>>& integral_points,
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stl_vector_mp<stl_vector_mp<double>>& surface_integral_weights,
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stl_vector_mp<stl_vector_mp<double>>& volume_integral_weights)
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{
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using algorithm::operate_on_merged_set_intervals;
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const auto& subfaces = tree.subfaces;
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const auto& subface_types = tree.subface_types;
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flat_hash_map_mp<Eigen::Vector2d, chain_vertex_property_t, chain_end_hasher> chain_ends{};
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stl_vector_mp<std::pair<Eigen::Vector2d, chain_vertex_property_t>> subchain_ends{};
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stl_vector_mp<double> line_parallel_to_u{}, line_parallel_to_v{};
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stl_vector_mp<double> intersection_u{}, intersection_v{};
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stl_vector_mp<Eigen::Vector3d> param_integral_points{};
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auto tensor_product_result = calculate_tensor_product_points(q);
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const auto& subface_nodes = pcurve_relation_graph.nodes<0>();
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integral_points.resize(subface_nodes.size());
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surface_integral_weights.resize(subface_nodes.size());
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volume_integral_weights.resize(subface_nodes.size());
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for (auto subface_node : subface_nodes) {
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// early exit: iff no active patch
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if (subface_node.edges<edge_bidirection::to_next>().empty()) continue;
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chain_ends.clear();
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line_parallel_to_u.clear();
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line_parallel_to_v.clear();
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intersection_u.clear();
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intersection_v.clear();
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param_integral_points.clear();
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const auto subface_index = subface_node.index();
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const auto subface_ptr = subfaces[subface_index];
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const auto subface_type = subface_types[subface_index];
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auto map_param_to_point_with_weight =
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std::bind(internal::get_map_param_to_point_with_weight_ptr(subface_type), subface_ptr, std::placeholders::_1);
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const auto subface_range_u = internal::get_range_u(subface_type), subface_range_v = internal::get_range_v(subface_type);
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const auto u_range = subface_range_u.first, v_range = subface_range_v.first;
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auto& int_p = integral_points[subface_index];
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auto& sur_int_w = surface_integral_weights[subface_index];
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auto& vol_int_w = volume_integral_weights[subface_index];
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auto transform_integral_points = [&] {
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std::for_each(param_integral_points.begin(), param_integral_points.end(), [&](const Eigen::Vector3d& p) {
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auto [world_p, surface_weight, volume_weight] = map_param_to_point_with_weight(Eigen::Vector2d{p.x(), p.y()});
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int_p.emplace_back(std::move(world_p));
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sur_int_w.emplace_back(p.z() * surface_weight);
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vol_int_w.emplace_back(p.z() * volume_weight);
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});
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};
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auto edges_to_chains = subface_node.edges<edge_bidirection::to_prev>();
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auto edges_to_patches = subface_node.edges<edge_bidirection::to_next>();
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// if no chain on subface, then just return tensor-product points as result
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// only one condition is permitted: subface is self sealing, as sphere
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if (bool empty_chains = edges_to_chains.empty(), limited_range = u_range < infinity && v_range < infinity;
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empty_chains && limited_range) {
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// if this subface is permitted to be plane, then just take use of tensor product points
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int_p.reserve(q * q);
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sur_int_w.reserve(q * q);
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vol_int_w.reserve(q * q);
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std::for_each(tensor_product_result.begin(), tensor_product_result.end(), [&](const Eigen::Vector3d& p) {
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Eigen::Vector2d transform_p{p.x() * u_range, p.y() * v_range};
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auto [world_p, surface_weight, volume_weight] = map_param_to_point_with_weight(transform_p);
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int_p.emplace_back(std::move(world_p));
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sur_int_w.emplace_back(p.z() * surface_weight);
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vol_int_w.emplace_back(p.z() * volume_weight);
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});
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continue;
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} else if (empty_chains)
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assert(limited_range);
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Eigen::AlignedBox2d subface_aabb{};
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for (auto edge_to_chain : edges_to_chains)
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for (const auto& [_, aabb] : edge_to_chain.property().subchains) subface_aabb.extend(aabb);
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// EDIT: change aabb bound to uv range if they exist, so we can include any valid interval
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if (u_range < infinity) {
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subface_aabb.min().x() = .0;
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subface_aabb.max().x() = u_range;
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}
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if (v_range < infinity) {
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subface_aabb.min().y() = .0;
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subface_aabb.max().y() = v_range;
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}
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// on boarder u = x
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auto scan_u_boarder_interval = [&](double x) {
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return u_line_subface_intersection(pcurve_relation_graph,
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subface_index,
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x,
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subface_aabb.min().y(),
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subface_aabb.max().y(),
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true,
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true);
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};
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// on boarder v = x
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auto scan_v_boarder_interval = [&](double x) {
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return v_line_subface_intersection(pcurve_relation_graph,
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subface_index,
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x,
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subface_aabb.min().x(),
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subface_aabb.max().x(),
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true,
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true);
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};
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auto expand_integral_on_u_ = [&](auto i, double l, double r, auto b0_iter, auto b1_iter, auto int_x, auto int_w) {
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auto x = gl_integrator.x_interval(q, i, l, r);
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if (x - b0_iter[1] > strict_epsilon) b0_iter += 2;
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if (x - b1_iter[1] > strict_epsilon) b1_iter += 2;
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expand_integral_on_u(q,
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pcurve_relation_graph,
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subface_index,
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x,
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subface_aabb.min().x(),
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subface_aabb.max().x(),
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x - b0_iter[0] > strict_epsilon,
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x - b1_iter[0] > strict_epsilon,
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gl_integrator.w_interval(q, i, l, r),
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int_x,
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int_w,
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param_integral_points);
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};
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auto expand_integral_on_v_ = [&](auto i, double l, double r, auto b0_iter, auto b1_iter, auto int_x, auto int_w) {
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auto x = gl_integrator.x_interval(q, i, l, r);
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if (x - b0_iter[1] > strict_epsilon) b0_iter += 2;
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if (x - b1_iter[1] > strict_epsilon) b1_iter += 2;
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expand_integral_on_v(q,
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pcurve_relation_graph,
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subface_index,
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x,
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subface_aabb.min().y(),
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subface_aabb.max().y(),
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x - b0_iter[0] > strict_epsilon,
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x - b1_iter[0] > strict_epsilon,
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gl_integrator.w_interval(q, i, l, r),
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int_x,
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int_w,
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param_integral_points);
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};
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auto expand_integral_on_u_by_gl = [&](auto i, double l, double r, auto b0_iter, auto b1_iter) {
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expand_integral_on_u_(i, l, r, b0_iter, b1_iter, gl_integrator.x_interval, gl_integrator.w_interval);
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};
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auto expand_integral_on_u_by_ts = [&](auto i, double l, double r, auto b0_iter, auto b1_iter) {
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expand_integral_on_u_(i, l, r, b0_iter, b1_iter, ts_integrator.x_interval, ts_integrator.w_interval);
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};
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auto expand_integral_on_v_by_gl = [&](auto i, double l, double r, auto b0_iter, auto b1_iter) {
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expand_integral_on_v_(i, l, r, b0_iter, b1_iter, gl_integrator.x_interval, gl_integrator.w_interval);
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};
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auto expand_integral_on_v_by_ts = [&](auto i, double l, double r, auto b0_iter, auto b1_iter) {
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expand_integral_on_v_(i, l, r, b0_iter, b1_iter, ts_integrator.x_interval, ts_integrator.w_interval);
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};
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for (auto edge_to_chain : edges_to_chains) {
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const auto chain_index = edge_to_chain.to().index();
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const auto& subchains = edge_to_chain.property().subchains;
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subchain_ends.clear();
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for (uint32_t subchain_index = 0; subchain_index < subchains.size(); subchain_index++) {
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const auto& vertices = subchains[subchain_index].vertices;
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auto vertex_iter = vertices.begin();
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auto prev_vertex_iter = vertex_iter;
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vertex_iter++;
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chain_vertex_property_t vertex_property{};
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auto update_vertex_property = [&] {
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auto prev_to_cur_delta = *vertex_iter - *prev_vertex_iter;
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vertex_property = {};
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vertex_property.total_count = 1;
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// condition below: negative, near parallel, positive
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if (prev_to_cur_delta.x() < -strict_epsilon)
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vertex_property.neg_delta_u = 1;
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else if (prev_to_cur_delta.x() >= strict_epsilon)
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vertex_property.pos_delta_u = 1;
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else
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line_parallel_to_v.emplace_back(vertex_iter->x());
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if (prev_to_cur_delta.y() < -strict_epsilon)
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vertex_property.neg_delta_v = 1;
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else if (prev_to_cur_delta.y() >= strict_epsilon)
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vertex_property.pos_delta_v = 1;
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else
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line_parallel_to_u.emplace_back(vertex_iter->y());
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};
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update_vertex_property();
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subchain_ends.emplace_back(*prev_vertex_iter, vertex_property);
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prev_vertex_iter++, vertex_iter++;
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auto prev_vertex_property = vertex_property;
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for (; prev_vertex_iter != vertices.end() - 1; prev_vertex_iter++, vertex_iter++) {
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update_vertex_property();
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if ((prev_vertex_property.neg_delta_u && vertex_property.pos_delta_u) //
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|| (prev_vertex_property.pos_delta_u && vertex_property.neg_delta_u))
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line_parallel_to_v.emplace_back(vertex_iter->x());
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if ((prev_vertex_property.neg_delta_v && vertex_property.pos_delta_v) //
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|| (prev_vertex_property.pos_delta_v && vertex_property.neg_delta_v))
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line_parallel_to_u.emplace_back(vertex_iter->y());
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prev_vertex_property = vertex_property;
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}
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subchain_ends.emplace_back(*prev_vertex_iter, ~vertex_property);
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}
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// handle subchain end, and insert ends into chain ends
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auto subchain_end_iter = subchain_ends.begin();
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chain_ends[subchain_end_iter->first] += subchain_end_iter->second;
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subchain_end_iter++;
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for (; subchain_end_iter != subchain_ends.end() - 1; subchain_end_iter += 2) {
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// HINT: the vertex of iter, iter + 1 should be the same except for periodical remapping
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const auto& p = subchain_end_iter->first;
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auto& property = subchain_end_iter->second;
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property += (subchain_end_iter + 1)->second;
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if (property.neg_delta_u >= 2 || property.pos_delta_u >= 2) line_parallel_to_v.emplace_back(p.x());
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if (property.neg_delta_v >= 2 || property.pos_delta_v >= 2) line_parallel_to_u.emplace_back(p.y());
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}
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// CAUTION: avoid ring
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if (subchain_ends.front().first != subchain_ends.back().first)
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chain_ends[subchain_end_iter->first] += subchain_end_iter->second;
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}
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// handle each chain end, try to figure out if there is intersection point or near parallel tagent
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for (const auto& [p, property] : chain_ends) {
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if (property.total_count > 1) {
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intersection_u.emplace_back(p.x());
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intersection_v.emplace_back(p.y());
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}
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if (property.neg_delta_u >= 2 || property.pos_delta_u >= 2) line_parallel_to_v.emplace_back(p.x());
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if (property.neg_delta_v >= 2 || property.pos_delta_v >= 2) line_parallel_to_u.emplace_back(p.y());
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}
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const auto line_parallel_to_u_size =
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scan_interval_boarder(subface_aabb.min().y(), subface_aabb.max().y(), line_parallel_to_u);
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const auto line_parallel_to_v_size =
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scan_interval_boarder(subface_aabb.min().x(), subface_aabb.max().x(), line_parallel_to_v);
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#if defined(DEBUG) && not defined(RELEASE_BRANCH)
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auto path = std::filesystem::current_path().parent_path().parent_path().parent_path().parent_path()
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/ "surface_integral_v2" / "plot";
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// append to given subface's meta data
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std::ofstream file(path / std::string("subface_" + std::to_string(subface_index) + ".meta"),
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std::ios::out | std::ios::app);
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file << std::scientific << std::setprecision(16) << subface_aabb.min().x() << " ";
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file << std::scientific << std::setprecision(16) << subface_aabb.min().y() << " ";
|
||
|
|
file << std::scientific << std::setprecision(16) << subface_aabb.max().x() << " ";
|
||
|
|
file << std::scientific << std::setprecision(16) << subface_aabb.max().y() << " ";
|
||
|
|
file << "\n\n";
|
||
|
|
|
||
|
|
// output parallel line u = x
|
||
|
|
for (const auto u : line_parallel_to_v) file << std::scientific << std::setprecision(16) << u << " ";
|
||
|
|
file << "\n";
|
||
|
|
for (const auto u : intersection_u) file << std::scientific << std::setprecision(16) << u << " ";
|
||
|
|
file << "\n";
|
||
|
|
// output parallel line v = x
|
||
|
|
for (const auto v : line_parallel_to_u) file << std::scientific << std::setprecision(16) << v << " ";
|
||
|
|
file << "\n";
|
||
|
|
for (const auto v : intersection_v) file << std::scientific << std::setprecision(16) << v << " ";
|
||
|
|
file << "\n";
|
||
|
|
|
||
|
|
file.close();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// always expand on direction of less parallel line, since this will generate less interval for integral
|
||
|
|
// HINT: if less line parallel to direction u, then the integral should expand on direction v
|
||
|
|
// iff either side of the interval is near parallel line, then corresponding half of the interval should use tanh-sinh
|
||
|
|
// integrator otherwise we will always use gauss-legendre integrator
|
||
|
|
if (line_parallel_to_v_size <= line_parallel_to_u_size) {
|
||
|
|
intersection_u.emplace_back(subface_aabb.min().x());
|
||
|
|
intersection_u.emplace_back(subface_aabb.max().x());
|
||
|
|
std::sort(intersection_u.begin(), intersection_u.end());
|
||
|
|
auto unique_end = std::unique(intersection_u.begin(), intersection_u.end(), sorted_double_equal);
|
||
|
|
auto start_boarder_intervals = scan_v_boarder_interval(subface_aabb.min().y());
|
||
|
|
auto end_boarder_intervals = scan_v_boarder_interval(subface_aabb.max().y());
|
||
|
|
auto b0_iter = start_boarder_intervals.begin(), b1_iter = end_boarder_intervals.begin();
|
||
|
|
operate_on_merged_set_intervals(line_parallel_to_v.begin(),
|
||
|
|
line_parallel_to_v.end(),
|
||
|
|
intersection_u.begin(),
|
||
|
|
unique_end,
|
||
|
|
double_less,
|
||
|
|
[&](double l, double r, bool l_exact_gl, bool r_exact_gl) {
|
||
|
|
if (l_exact_gl)
|
||
|
|
for (auto i = 0; i < q / 2; ++i)
|
||
|
|
expand_integral_on_v_by_gl(i, l, r, b0_iter, b1_iter);
|
||
|
|
else
|
||
|
|
for (auto i = 0; i < q / 2; ++i)
|
||
|
|
expand_integral_on_v_by_ts(i, l, r, b0_iter, b1_iter);
|
||
|
|
|
||
|
|
if (r_exact_gl)
|
||
|
|
for (auto i = q / 2; i < q; ++i)
|
||
|
|
expand_integral_on_v_by_gl(i, l, r, b0_iter, b1_iter);
|
||
|
|
else
|
||
|
|
for (auto i = q / 2; i < q; ++i)
|
||
|
|
expand_integral_on_v_by_ts(i, l, r, b0_iter, b1_iter);
|
||
|
|
});
|
||
|
|
// integral_plan.axis_to_expand = axis::v;
|
||
|
|
} else {
|
||
|
|
intersection_v.emplace_back(subface_aabb.min().y());
|
||
|
|
intersection_v.emplace_back(subface_aabb.max().y());
|
||
|
|
std::sort(intersection_v.begin(), intersection_v.end());
|
||
|
|
auto unique_end = std::unique(intersection_v.begin(), intersection_v.end(), sorted_double_equal);
|
||
|
|
auto start_boarder_intervals = scan_u_boarder_interval(subface_aabb.min().x());
|
||
|
|
auto end_boarder_intervals = scan_u_boarder_interval(subface_aabb.max().x());
|
||
|
|
auto b0_iter = start_boarder_intervals.begin(), b1_iter = end_boarder_intervals.begin();
|
||
|
|
operate_on_merged_set_intervals(line_parallel_to_u.begin(),
|
||
|
|
line_parallel_to_u.end(),
|
||
|
|
intersection_v.begin(),
|
||
|
|
unique_end,
|
||
|
|
double_less,
|
||
|
|
[&](double l, double r, bool l_exact_gl, bool r_exact_gl) {
|
||
|
|
if (l_exact_gl)
|
||
|
|
for (auto i = 0; i < q / 2; ++i)
|
||
|
|
expand_integral_on_u_by_gl(i, l, r, b0_iter, b1_iter);
|
||
|
|
else
|
||
|
|
for (auto i = 0; i < q / 2; ++i)
|
||
|
|
expand_integral_on_u_by_ts(i, l, r, b0_iter, b1_iter);
|
||
|
|
|
||
|
|
if (r_exact_gl)
|
||
|
|
for (auto i = q / 2; i < q; ++i)
|
||
|
|
expand_integral_on_u_by_gl(i, l, r, b0_iter, b1_iter);
|
||
|
|
else
|
||
|
|
for (auto i = q / 2; i < q; ++i)
|
||
|
|
expand_integral_on_u_by_ts(i, l, r, b0_iter, b1_iter);
|
||
|
|
});
|
||
|
|
// integral_plan.axis_to_expand = axis::u;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(DEBUG) && not defined(RELEASE_BRANCH)
|
||
|
|
// append to given subface's meta data
|
||
|
|
file.open(path / std::string("subface_" + std::to_string(subface_index) + ".int2d"));
|
||
|
|
|
||
|
|
for (const auto& integral_points : param_integral_points)
|
||
|
|
file << integral_points[0] << " " << integral_points[1] << " " << integral_points[2] << "\n";
|
||
|
|
|
||
|
|
file.close();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// transform integral points in [u, v] to [x, y, z] with related weights
|
||
|
|
transform_integral_points();
|
||
|
|
|
||
|
|
int_p.shrink_to_fit();
|
||
|
|
sur_int_w.shrink_to_fit();
|
||
|
|
vol_int_w.shrink_to_fit();
|
||
|
|
|
||
|
|
#if defined(DEBUG) && not defined(RELEASE_BRANCH)
|
||
|
|
// append to given subface's meta data
|
||
|
|
file.open(path / std::string("subface_" + std::to_string(subface_index) + ".int3d"));
|
||
|
|
|
||
|
|
for (const auto& integral_points : int_p)
|
||
|
|
file << integral_points[0] << " " << integral_points[1] << " " << integral_points[2] << "\n";
|
||
|
|
file << "\n";
|
||
|
|
|
||
|
|
for (const auto& weight : sur_int_w) file << weight << "\n";
|
||
|
|
file << "\n";
|
||
|
|
|
||
|
|
for (const auto& weight : vol_int_w) file << weight << "\n";
|
||
|
|
file << "\n";
|
||
|
|
|
||
|
|
file.close();
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|