弧长属性 （ActiveX）

签名

工 务 局：

object.ArcLength

对象

类型：弧形

此属性适用的对象。

属性值

只读：是的

类型：双

弧的长度。

言论

没有额外的评论。

例子

工 务 局：

Sub Example_ArcLength()
    ' This example creates an Arc in model space and returns the length of the new Arc
    Dim arcObj As AcadArc
    Dim centerPoint(0 To 2)  As Double
    Dim radius As Double
    Dim startAngleInDegree As Double, endAngleInDegree As Double
    Dim startAngleInRadian As Double, endAngleInRadian As Double
    
    ' Define the Arc
    centerPoint(0) = 0: centerPoint(1) = 0: centerPoint(2) = 0
    radius = 5#
    startAngleInDegree = 10#: endAngleInDegree = 230#

    ' Convert the angles in degrees to angles in radians
    startAngleInRadian = startAngleInDegree * 3.141592 / 180#
    endAngleInRadian = endAngleInDegree * 3.141592 / 180#
    
    ' Create the arc object in model space
    Set arcObj = ThisDrawing.ModelSpace.AddArc(centerPoint, radius, startAngleInRadian, endAngleInRadian)
    ThisDrawing.Application.ZoomAll
    
    ' Return length of new arc
    MsgBox "The length of the new Arc is: " & arcObj.ArcLength
End Sub

Visual LISP：

(vl-load-com)
(defun c:Example_ArcLength()
    ;; This example creates an Arc in model space and returns the length of the new Arc
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
  
    ;; Define the Arc
    (setq centerPoint (vlax-3d-point 0 0 0)  
          radius 5
          startAngleInDegree 10
          endAngleInDegree 230)

    ;; Convert the angles in degrees to angles in radians
    (setq startAngleInRadian (/ (* startAngleInDegree 3.141592) 180))
    (setq endAngleInRadian (/ (* endAngleInDegree 3.141592) 180))
    
    ;; Create the arc object in model space
    (setq modelSpace (vla-get-ModelSpace doc))  
    (setq arcObj (vla-AddArc modelSpace centerPoint radius startAngleInRadian endAngleInRadian))
    (vla-ZoomAll acadObj)
    
    ;; Return length of new arc
    (alert (strcat "The length of the new Arc is: " (rtos (vla-get-ArcLength arcObj) 2)))
)