23 lines
415 B
Markdown
23 lines
415 B
Markdown
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# Ray::GetPoint
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```cpp
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Vector3 GetPoint(float t) const
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```
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获取射线上指定距离处的点。
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**参数：**
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- `t` - 沿射线方向的参数距离
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**返回：** `Vector3` - 射线上的点 `origin + direction * t`
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**复杂度：** O(1)
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**示例：**
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```cpp
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Ray ray(cameraPosition, mouseRayDir.Normalized());
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float t = 100.0f;
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Vector3 point = ray.GetPoint(t); // 沿射线方向 100 单位处的点
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```
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