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◆ linesHit()
| float mgnear::linesHit |
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int |
n, |
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const Point2d * |
points, |
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bool |
closed, |
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const Point2d & |
pt, |
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float |
tol, |
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Point2d & |
nearpt, |
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int & |
segment, |
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bool * |
inside = (bool*)0, |
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int * |
hitType = (int*)0, |
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int |
flags = -1, |
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int |
ignoreVertex = -1 |
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static |
计算点到折线或多边形的最近距离
- 参数
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| [in] | n | 顶点数 |
| [in] | points | 顶点坐标数组，元素个数为n |
| [in] | closed | 是否为多边形 |
| [in] | pt | 图形外给定的点 |
| [in] | tol | 距离公差，正数，超出则不计算最近点 |
| [out] | nearpt | 图形上的最近点 |
| [out] | segment | 最近点所在线段的序号，[0,n-2]，闭合时为[0,n-1]，负数表示失败 |
| [out] | inside | 是否点中多边形内部 |
| [out] | hitType | 点击类型，见 MgPtInAreaRet |
| [in] | flags | 允许检测的位，{1<<PtInAreaRet} |
| [in] | ignoreVertex | 不捕捉的顶点序号 |
- 返回
- 给定的点到最近点的距离，失败时为极大数
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