请教多段线相交问题
假设图内有大量的多段落线,任取其中一根,如何快速确定其它的多段线是否与所选这根相交?当然不能采用一根根试的办法先用GetBoundingBox返回对象边框的最大和最小点,再。。。
"先用GetBoundingBox返回对象边框的最大和最小点,再。。。"
是用最大和最小点做框选,然后再一根根与框选到的实体比较吗?这样做只是缩小了范围,还有没有其它办法
用这种方法可以做到的
Dim ssetObj As AcadSelectionSet
Set ssetObj = ThisDrawing.SelectionSets.Add("TEST_SSET2")
' Add all the entities that lie within a fence to the selection set
Dim mode As Integer
Dim pointsArray(0 To 11) As Double
mode = acSelectionSetFence
pointsArray(0) = 28.2: pointsArray(1) = 17.2: pointsArray(2) = 0
pointsArray(3) = -5: pointsArray(4) = 13: pointsArray(5) = 0
pointsArray(6) = -3.3: pointsArray(7) = -3.6: pointsArray(8) = 0
pointsArray(9) = 28: pointsArray(10) = -3: pointsArray(11) = 0
ssetObj.SelectByPolygon mode, pointsArray
没看明白,好象回答的不是我的问题
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