# Bounds::Expand ```cpp void Expand(float amount) void Expand(const Vector3& amount) ``` 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)。 **参数:** - `amount` - 扩展量(标量时各方向均匀扩展,向量时各分量分别扩展) **返回:** `void` **线程安全:** ✅ **复杂度:** O(1) **示例:** ```cpp #include #include using namespace XCEngine::Math; Bounds bounds(Vector3(0.0f, 0.0f, 0.0f), Vector3(2.0f, 2.0f, 2.0f)); bounds.Expand(1.0f); // extents becomes (2.0, 2.0, 2.0), size increased by 1 in each direction bounds.Expand(Vector3(1.0f, 0.0f, 0.0f)); // extents becomes (2.5, 2.0, 2.0), only x extended ``` ## 相关文档 - [Bounds](bounds.md) - 返回类总览 - [Encapsulate](encapsulate.md) - 扩展以包含点或 Bounds