85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
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#pragma once
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/**
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* @file parallel_intersection.h
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* @brief 并行曲面/曲线求交
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*
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* OpenMP 并行化曲面-曲面求交和曲线-曲线求交。
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*
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* @ingroup curves
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*/
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#include "vde/core/point.h"
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#include "vde/curves/nurbs_curve.h"
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#include "vde/curves/nurbs_surface.h"
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#include <vector>
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#include <utility>
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namespace vde::curves {
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// ═══════════════════════════════════════════════════════════
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// Parallel Curve Intersection
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// ═══════════════════════════════════════════════════════════
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/**
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* @brief 并行计算一组曲线对的交点
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*
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* 每对曲线独立求交，结果线程安全合并。
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*
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* @param curve_pairs 曲线对列表 ((curve_a_idx, curve_b_idx), ...)
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* @param curves_a 曲线集合 A
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* @param curves_b 曲线集合 B
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* @return 每条曲线对的交点参数列表
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*/
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[[nodiscard]] std::vector<std::vector<std::pair<double, double>>>
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parallel_curve_intersections(
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const std::vector<std::pair<int, int>>& curve_pairs,
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const std::vector<NurbsCurve>& curves_a,
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const std::vector<NurbsCurve>& curves_b);
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// ═══════════════════════════════════════════════════════════
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// Parallel Surface Intersection
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// ═══════════════════════════════════════════════════════════
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/// 曲面交线段
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struct SurfaceIntersectionSegment {
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core::Point3D start;
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core::Point3D end;
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double u_a_start, v_a_start;
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double u_a_end, v_a_end;
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double u_b_start, v_b_start;
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double u_b_end, v_b_end;
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};
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/**
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* @brief 并行计算两曲面的交线
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*
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* 递归细分 + 牛顿精化，边界盒预筛选，并行分发。
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*
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* @param surf_a 曲面 A
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* @param surf_b 曲面 B
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* @param tolerance 精度要求
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* @param max_refinements 最大细分次数
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* @return 交线段列表
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*/
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[[nodiscard]] std::vector<SurfaceIntersectionSegment>
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parallel_surface_intersection(
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const NurbsSurface& surf_a, const NurbsSurface& surf_b,
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double tolerance = 1e-6, int max_refinements = 10);
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/**
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* @brief 并行批量曲面-曲面对求交
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*
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* @param pairs 曲面对索引
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* @param surfaces_a 曲面集合 A
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* @param surfaces_b 曲面集合 B
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* @return 每对曲面的交线段列表
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*/
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[[nodiscard]] std::vector<std::vector<SurfaceIntersectionSegment>>
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parallel_surface_intersections(
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const std::vector<std::pair<int, int>>& pairs,
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const std::vector<NurbsSurface>& surfaces_a,
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const std::vector<NurbsSurface>& surfaces_b,
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double tolerance = 1e-6);
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} // namespace vde::curves
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