茂之钳
8be2f0ba0a
M1 — Draft Analysis (拔模分析): - draft_angle(face, pull_dir): compute draft angle from NURBS surface normal - analyze_draft(body, pull_dir, min_angle): full-model analysis with face classification - DraftFaceType: Positive/Negative/ZeroDraft/Undercut with area-weighted stats - draft_report(): human-readable moldability report - create_draft_face / apply_draft: face rotation stubs (needs mutable surface access) M2 — Incremental Mesh (增量网格): - IncrementalMesher: face_id → mesh fragment mapping with dirty tracking - invalidate_face / rebuild_dirty / rebuild_all: targeted remeshing - merged_mesh(): combine clean face meshes into single HalfedgeMesh - Cache statistics: hit rate + memory estimation M3 — Kinematic Chain (运动链求解): - FourBarLinkage: Grashof classification + Freudenstein position solver - GearPair/GearTrain: ratio-based transmission solver with multi-stage support - CamFollower: 5 motion types (Dwell/CV/SHM/Cycloidal/3-4-5 Polynomial) - Full-cycle analysis for all solvers 7 new files, ~1400 lines of header + implementation
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
#pragma once
|
||
/**
|
||
* @file incremental_mesh.h
|
||
* @brief 增量网格生成
|
||
*
|
||
* B-Rep 参数修改后，仅重建受影响面的 tessellation，而非全量重算。
|
||
* 与 IncrementalUpdateEngine 集成，维护面级网格缓存。
|
||
*
|
||
* @ingroup brep
|
||
*/
|
||
|
||
#include "vde/brep/brep.h"
|
||
#include "vde/mesh/halfedge_mesh.h"
|
||
#include <unordered_map>
|
||
#include <unordered_set>
|
||
#include <vector>
|
||
#include <string>
|
||
|
||
namespace vde::brep {
|
||
|
||
// ═══════════════════════════════════════════════════════════
|
||
// IncrementalMesher
|
||
// ═══════════════════════════════════════════════════════════
|
||
|
||
/**
|
||
* @brief 增量网格生成器
|
||
*
|
||
* 维护 face_id → 三角网格片段的映射。
|
||
* 参数修改时仅标脏受影响面，重建时只重新 tessellate 脏面。
|
||
*
|
||
* @ingroup brep
|
||
*/
|
||
class IncrementalMesher {
|
||
public:
|
||
/// 网格片段：单个面的三角网格
|
||
struct FaceMesh {
|
||
std::vector<core::Point3D> vertices;
|
||
std::vector<std::array<int, 3>> triangles;
|
||
double tessellation_deflection = 0.01;
|
||
};
|
||
|
||
/**
|
||
* @brief 标脏指定面（参数已修改，需要重新 tessellate）
|
||
*
|
||
* @param face_id 面ID
|
||
*/
|
||
void invalidate_face(int face_id);
|
||
|
||
/**
|
||
* @brief 增量重建：仅重新 tessellate 脏面
|
||
*
|
||
* @param body B-Rep 实体（提供几何数据）
|
||
* @param deflection tessellation 精度
|
||
* @return 重建的面数量
|
||
*/
|
||
[[nodiscard]] int rebuild_dirty(const BrepModel& body, double deflection = 0.01);
|
||
|
||
/**
|
||
* @brief 全量重建（清除所有缓存后重建）
|
||
*
|
||
* @param body B-Rep 实体
|
||
* @param deflection tessellation 精度
|
||
* @return 重建的面数量
|
||
*/
|
||
[[nodiscard]] int rebuild_all(const BrepModel& body, double deflection = 0.01);
|
||
|
||
/**
|
||
* @brief 获取单个面的缓存网格
|
||
*
|
||
* @param face_id 面ID
|
||
* @return 缓存网格指针，脏面返回 nullptr
|
||
*/
|
||
[[nodiscard]] const FaceMesh* get_mesh(int face_id) const;
|
||
|
||
/**
|
||
* @brief 获取完整网格（合并所有已缓存面网格）
|
||
*
|
||
* 只包含非脏面的缓存数据。
|
||
*
|
||
* @return 合并后的完整网格
|
||
*/
|
||
[[nodiscard]] mesh::HalfedgeMesh merged_mesh() const;
|
||
|
||
/// 清除所有缓存
|
||
void clear_all();
|
||
|
||
/// 统计
|
||
[[nodiscard]] int dirty_count() const { return static_cast<int>(dirty_set_.size()); }
|
||
[[nodiscard]] int total_faces() const { return static_cast<int>(meshes_.size()); }
|
||
[[nodiscard]] int cache_hits() const { return cache_hits_; }
|
||
[[nodiscard]] int cache_misses() const { return cache_misses_; }
|
||
[[nodiscard]] double hit_rate() const;
|
||
|
||
/// 估计缓存占用内存（字节）
|
||
[[nodiscard]] size_t memory_estimate() const;
|
||
|
||
private:
|
||
std::unordered_map<int, FaceMesh> meshes_; ///< face_id → cached mesh
|
||
std::unordered_set<int> dirty_set_; ///< 脏面集合
|
||
int cache_hits_ = 0;
|
||
int cache_misses_ = 0;
|
||
|
||
/// Tessellate a single face of the BrepModel
|
||
[[nodiscard]] FaceMesh tessellate_face(const BrepModel& body, int face_id,
|
||
double deflection) const;
|
||
|
||
/// Merge vertex arrays from multiple face meshes into one HalfedgeMesh
|
||
[[nodiscard]] mesh::HalfedgeMesh merge_face_meshes(
|
||
const std::vector<const FaceMesh*>& meshes) const;
|
||
};
|
||
|
||
} // namespace vde::brep
|