茂之钳
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
#pragma once
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#include "vde/brep/assembly.h"
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#include <unordered_map>
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#include <string>
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#include <vector>
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namespace vde::brep {
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/// Shared geometry instance (for repeated parts)
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struct GeometryInstance {
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std::string part_name;
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BrepModel geometry; ///< shared geometry data
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size_t use_count = 0; ///< number of references to this geometry
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};
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/**
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* @brief Instance manager for large assemblies.
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*
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* Deduplicates repeated parts by reusing shared geometry.
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* Reduces memory and improves cache coherence for assemblies
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* with thousands of identical components (fasteners, links, panels).
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*
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* @ingroup brep
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*/
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class AssemblyInstancer {
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public:
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/**
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* @brief Register a geometry for instancing.
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* @param name Part name identifier
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* @param geom Geometry to register
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* @return instance ID, reuses existing if same name & geometry matches
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*/
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int register_instance(const std::string& name, const BrepModel& geom);
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/**
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* @brief Create an occurrence of a registered instance.
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* @param assy Target assembly
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* @param parent Parent node (nullptr = root)
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* @param instance_id Instance to place
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* @param transform Local transform for this occurrence
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*/
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void place_instance(Assembly& assy, AssemblyNode* parent,
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int instance_id, const Transform3D& transform);
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/// Total unique geometries
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[[nodiscard]] size_t unique_count() const { return instances_.size(); }
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/// Total placed occurrences
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[[nodiscard]] size_t total_placed() const { return total_placed_; }
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private:
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std::vector<GeometryInstance> instances_;
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size_t total_placed_ = 0;
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};
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} // namespace vde::brep
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