24 lines
423 B
Markdown
24 lines
423 B
Markdown
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# OBB::GetAxis
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```cpp
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Vector3 GetAxis(int index) const
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```
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获取 OBB 的局部坐标轴。
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**参数：**
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- `index` - 轴索引（0=X轴, 1=Y轴, 2=Z轴）
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**返回：** `Vector3` - 对应轴的方向向量
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**复杂度：** O(1)
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**示例：**
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```cpp
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OBB obb = ...;
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Vector3 xAxis = obb.GetAxis(0); // 局部 X 轴
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Vector3 yAxis = obb.GetAxis(1); // 局部 Y 轴
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Vector3 zAxis = obb.GetAxis(2); // 局部 Z 轴
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```
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