IsPeriodic Property （ActiveX）

签名

工 务 局：

object.IsPeriodic

对象

类型：样条

此属性适用的对象。

属性值

只读：是的

类型：布尔

• True：样条是周期性的。
• False：样条曲线不是周期性的。

言论

没有额外的评论。

例子

工 务 局：

Sub Example_IsPeriodic()
    ' This example creates a Spline object in model space and
    ' determines if the Spline is periodic

    Dim splineObj As AcadSpline
    Dim startTan(0 To 2) As Double, endTan(0 To 2) As Double
    Dim fitPoints(0 To 8) As Double
    Dim UserMessage As String
    
    ' Define the Spline object
    startTan(0) = 0.5: startTan(1) = 0.5: startTan(2) = 0
    endTan(0) = 0.5: endTan(1) = 0.5: endTan(2) = 0
    fitPoints(0) = 0: fitPoints(1) = 0: fitPoints(2) = 0: fitPoints(3) = 5
    fitPoints(4) = 5: fitPoints(5) = 0: fitPoints(6) = 10: fitPoints(7) = 0: fitPoints(8) = 0
    
    ' Create new Spline object
    Set splineObj = ThisDrawing.ModelSpace.AddSpline(fitPoints, startTan, endTan)
    ThisDrawing.Application.ZoomAll
    
    ' Display whether or not new Spline is periodic
    UserMessage = IIf(splineObj.IsPeriodic, "is periodic", "is not periodic")
    
    MsgBox "The new Spline " & UserMessage
    
End Sub

Visual LISP：

(vl-load-com)
(defun c:Example_IsPeriodic()
    ;; This example creates a Spline object in model space and
    ;; determines if the Spline is periodic
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    
    ;; Define the Spline object
    (setq startTan (vlax-3d-point 0.5 0.5 0)
          endTan (vlax-3d-point 0.5 0.5 0)
          fitPoints (vlax-make-safearray vlax-vbDouble '(0 . 8)))
    (vlax-safearray-fill fitPoints '(0 0 0
				     5 5 0
				     10 0 0
				    )
    )
    
    ;; Create new Spline object
    (setq modelSpace (vla-get-ModelSpace doc))
    (setq splineObj (vla-AddSpline modelSpace fitPoints startTan endTan))
    (vla-ZoomAll acadObj)
    
    ;; Display whether or not new Spline is periodic
    (setq UserMessage (if (= (vla-get-IsPeriodic splineObj) :vlax-true) "is periodic" "is not periodic"))
    
    (alert (strcat "The new Spline " UserMessage))
)