复制的关于AddHatch的例子,为何不能运行??

sdsuyan

我复制的AutoCAD VBA帮助中的例子(AppendOuterLoop ),为什么不能运行?能帮我看看吗? 这是个填充半圆的例子. 倒数第二行(hatchObj.Evaluate)语句总是不能运行. ------------------------------------ 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).EndPoint, outerLoop(0).StartPoint)

' Append the outer loop to the hatch object, and display the hatch
hatchObj.AppendOuterLoop (outerLoop)
hatchObj.Evaluate
ZoomAll

End Sub

mccad

原因：比例太大，造成要填充的面积中不能出现填充图案，所以出错。
可以修改圆弧的半径，或在Set hatchObj...后增加：
hatchObj.PatternScale = 0.2