如何在VB6中求取两个对象交点的办法
本帖最后由 作者 于 2006-4-27 17:33:40 编辑 <br /><br /> <P>在VB6中如何用样条曲线spline组合成填充区域.线条相交,在CAD操作界面中可以手动填冲,在VB6中如何采用代码来填冲．下面这个示例中用的都是已知交点，用交点重新组合就可以构建填充区域了！</P><PRE class=Code>Sub Example_AppendOuterLoop()' This example creates an associative hatch in model space.
Dim hatchObj As AcadHatch
Dim patternName As String
Dim PatternType As Long
Dim bAssociativity As Boolean
' Define the hatch
patternName = "ANSI31"
PatternType = 0
bAssociativity = True
' Create the associative Hatch object
Set hatchObj = ThisDrawing.ModelSpace.AddHatch(PatternType, patternName, bAssociativity)
' Create the outer loop for the hatch.
' An arc and a line are used to create a closed loop.
Dim outerLoop(0 To 1) As AcadEntity
Dim center(0 To 2) As Double
Dim radius As Double
Dim startAngle As Double
Dim endAngle As Double
center(0) = 5: center(1) = 3: center(2) = 0
radius = 1
startAngle = 0
endAngle = 3.141592
Set outerLoop(0) = ThisDrawing.ModelSpace.AddArc(center, radius, startAngle, endAngle)
Set outerLoop(1) = ThisDrawing.ModelSpace.AddLine(outerLoop(0).startPoint, outerLoop(0).endPoint)
' Append the outer loop to the hatch object, and display the hatch
hatchObj.AppendOuterLoop (outerLoop)
hatchObj.Evaluate
ZoomAll
End Sub</PRE><PRE class=Code> </PRE> 晕死了，最后还是用这个办法解决的。求到交点再重新组合点来构建填冲区域。
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