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XCSDD/docs/api/math/vector3/sqrmagnitude.md
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Vector3::SqrMagnitude

static float SqrMagnitude(const Vector3& v)
float SqrMagnitude() const

计算向量长度的平方。比 Magnitude 更快,避免了开方运算。

静态版本参数:

  • v - 要计算长度的向量

实例版本: 计算当前向量的长度平方。

返回: float - 向量长度平方 x * x + y * y + z * z

复杂度: O(1)

示例:

Vector3 v(1.0f, 2.0f, 2.0f);
float sqlen = v.SqrMagnitude();                    // 9.0f
float sqlen2 = Vector3::SqrMagnitude(v);          // 9.0f