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# Vector3::ProjectOnPlane
```cpp
static Vector3 ProjectOnPlane(const Vector3& vector, const Vector3& planeNormal)
```
将向量投影到平面上(减去沿平面法线的分量)。
**参数:**
- `vector` - 要投影的向量
- `planeNormal` - 平面法线
**返回:** `Vector3` - 平面上的投影向量
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**线程安全:** ✅
**复杂度:** O(1)
**示例:**
```cpp
Vector3 v(1.0f, 1.0f, 1.0f);
Vector3 normal(0.0f, 1.0f, 0.0f); // XZ 平面
Vector3 projected = Vector3::ProjectOnPlane(v, normal); // (1, 0, 1)
```
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## 相关文档
- [Vector3 类总览](vector3.md) - 返回类总览
- [`Project`](project.md) - 投影到法线上