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26 lines
498 B
Markdown
26 lines
498 B
Markdown
# Vector2::Magnitude
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```cpp
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static float Magnitude(const Vector2& v)
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float Magnitude() const
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```
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计算向量的长度（欧几里得范数）。
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**静态版本参数：**
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- `v` - 要计算长度的向量
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**实例版本：** 计算当前向量的长度。
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**返回：** `float` - 向量长度 sqrt(x * x + y * y)
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**复杂度：** O(1)
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**示例：**
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```cpp
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Vector2 v(3.0f, 4.0f);
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float len = v.Magnitude(); // 5.0f
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float len2 = Vector2::Magnitude(v); // 5.0f
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```
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