西风逍遥游
4377e062dd
Squashed onto current main. Adds src/engine/common/Assert.h (EV_PARAM_CHECK / EV_ASSERT backed by zeroerr), an EVENGINE_ENABLE_ASSERTS option (non-Debug builds strip ZEROERR_NO_ASSERT unless enabled), parameter checks at key entry points, Doxygen comments across headers, Doxyfile + make docs / CMake docs targets, and Windows setup + code conventions in AGENTS.md.
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
#pragma once
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#include "spatial/Bounds.h"
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#include "spatial/QueryIds.h"
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#include <unordered_map>
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#include <unordered_set>
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#include <vector>
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namespace eve::spatial {
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/**
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* @brief Uniform-grid spatial hash for 2D AABB queries (map / particle / entity culling).
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* Items are registered in every overlapped cell.
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*/
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class SpatialHash2D {
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public:
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explicit SpatialHash2D(float cellSize = 64.f);
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~SpatialHash2D() = default;
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SpatialHash2D(const SpatialHash2D &) = delete;
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SpatialHash2D &operator=(const SpatialHash2D &) = delete;
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void clear();
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void setCellSize(float cellSize);
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float getCellSize() const { return cellSize_; }
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bool insert(int id, float minX, float minY, float maxX, float maxY);
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bool remove(int id);
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bool update(int id, float minX, float minY, float maxX, float maxY);
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bool contains(int id) const;
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int getCount() const { return static_cast<int>(items_.size()); }
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int queryPoint(float x, float y);
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int queryRect(float minX, float minY, float maxX, float maxY);
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int queryCircle(float cx, float cy, float radius);
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int getResultCount() const { return results_.getCount(); }
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int getResultId(int index) const { return results_.getId(index); }
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private:
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void cellRange(const AABB2 &b, int &minCX, int &minCY, int &maxCX, int &maxCY) const;
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void insertCells(int id, const AABB2 &b);
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void eraseCells(int id, const AABB2 &b);
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void queryCells(int minCX, int minCY, int maxCX, int maxCY, const AABB2 *rect, float cx,
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float cy, float radius, bool useCircle, bool usePoint);
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float cellSize_ = 64.f;
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std::unordered_map<int, AABB2> items_;
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std::unordered_map<uint64_t, std::vector<int>> cells_;
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QueryIds results_;
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};
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} // namespace eve::spatial
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