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阅读：1402回复：3
[求助]怎么判断一个点是否在弧段上？
<P>各位大虾，请教一个问题：在AO二次开发中，道路网已经建好，现在已知一个点，通过什么方法可以判断这个点是否在某条弧段上？</P>
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1楼#
发布于：2005-11-09 09:35
<P>这段代码应该是吧！你看看！</P>
<P>Dim pMxDoc As IMxDocument<BR>Set pMxDoc = ThisDocument<BR>Dim pEnumFeature As IEnumFeature<BR>Set pEnumFeature = pMxDoc.FocusMap.FeatureSelection<BR>Dim pFeature As IFeature<BR>pEnumFeature.Reset<BR>Set pFeature = pEnumFeature.Next<BR>If pFeature Is Nothing Then<BR> MsgBox "Please select a valid feature", vbInformation<BR> Exit Sub<BR>End If<BR>Dim pRelationalOperator As IRelationalOperator<BR><FONT color=#e61a6b>Set pRelationalOperator = pFeature.ShapeCopy<BR>Dim pPoint As IPoint<BR>Set pPoint = New esriCore.Point<BR>pPoint.PutCoords InputBox("X coordinate of the point?"), InputBox("Y coordinate of the point?")<BR></FONT>If <FONT color=#ff0033>pRelationalOperator.Contains(pPoint)</FONT> Then MsgBox "Inside" Else MsgBox "Outside"</P> |
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2楼#
发布于：2005-11-09 09:39
<P>在各个几何对象中有一个IRelationalOperator接口，它是专门用来判断几何对象之间的拓扑关系的！<br></P>
[此贴子已经被作者于2005-11-9 10:36:26编辑过]
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3楼#
发布于：2005-11-09 09:47
<P>哦，万分感谢。</P>
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