43 lines
984 B
Markdown
43 lines
984 B
Markdown
# Plane::GetDistanceToPoint
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```cpp
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float GetDistanceToPoint(const Vector3& point) const
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```
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计算点到平面的有符号距离。正值表示点在法线方向一侧，负值表示点在法线相反方向一侧，零值表示点在平面上。
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**参数：**
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- `point` - 要计算的点
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**返回：** `float` - 点到平面的有符号距离
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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/Plane.h>
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#include <XCEngine/Math/Vector3.h>
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#include <cstdio>
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using namespace XCEngine::Math;
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void GetDistanceToPointExample() {
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Plane plane(Vector3::Up(), 0.0f);
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Vector3 point1(0.0f, 2.0f, 0.0f);
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float dist1 = plane.GetDistanceToPoint(point1);
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Vector3 point2(0.0f, -3.0f, 0.0f);
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float dist2 = plane.GetDistanceToPoint(point2);
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}
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```
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## 相关文档
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- [Plane 类总览](plane.md) - 返回类总览
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- [GetClosestPoint](getclosestpoint.md) - 计算平面上最接近点
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- [GetSide](getside.md) - 判断点在哪一侧
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