docs: update resources API docs
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docs/api/resources/mesh/get-index-data.md
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docs/api/resources/mesh/get-index-data.md
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# Mesh::GetIndexData
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```cpp
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const void* GetIndexData() const;
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```
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获取网格索引数据的只读指针。
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**参数:** 无
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**返回:** `const void*` - 索引数据指针,如果没有设置则返回 nullptr
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**异常:** 无
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**线程安全:** ✅
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**复杂度:** O(1)
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**示例:**
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```cpp
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#include "XCEngine/Resources/Mesh.h"
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using namespace XCEngine::Resources;
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Mesh mesh;
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mesh.SetIndexData(...);
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const void* indexData = mesh.GetIndexData();
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if (indexData != nullptr) {
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// 安全访问索引数据
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}
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```
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## 相关文档
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- [类总览](mesh.md) - 返回类总览
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