39 lines
990 B
Markdown
39 lines
990 B
Markdown
# Bounds::Expand
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```cpp
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void Expand(float amount)
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void Expand(const Vector3& amount)
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```
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扩展包围盒。输入值会被除以 2 后添加到 extents 上（标量扩展时，每个轴的 extents 增加 `amount * 0.5f`，即实际尺寸增加 `amount`；向量扩展时，各分量分别处理）。
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**参数：**
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- `amount` - 扩展量（标量时各方向均匀扩展，向量时各分量分别扩展）
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**返回：** `void`
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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/Math/Bounds.h>
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#include <XCEngine/Math/Vector3.h>
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using namespace XCEngine::Math;
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Bounds bounds(Vector3(0.0f, 0.0f, 0.0f), Vector3(2.0f, 2.0f, 2.0f));
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bounds.Expand(1.0f);
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// extents becomes (2.0, 2.0, 2.0), size increased by 1 in each direction
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bounds.Expand(Vector3(1.0f, 0.0f, 0.0f));
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// extents becomes (2.5, 2.0, 2.0), only x extended
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```
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## 相关文档
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- [Bounds](bounds.md) - 返回类总览
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- [Encapsulate](encapsulate.md) - 扩展以包含点或 Bounds
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