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AutoCAD 2018 开发者帮助

StartAngle 属性（ActiveX）

2024-5-18 16:55| 发布者: admin| 查看: 65| 评论: 0|原作者: admin|来自: AutoCAD

指定圆弧或椭圆的起始角度。

支持的平台：仅限 Windows

签名

VBA：

object.StartAngle

对象

类型：弧形，椭圆

此属性应用于的对象。

属性值

只读：不

类型：双

以弧度为单位的起始角。

言论

例子

VBA：

Sub Example_StartAngle()
    ' This example creates an ellipse and enters the start and
    ' end angles to create an elliptical arc.
    Dim ellObj As AcadEllipse
    Dim majAxis(0 To 2) As Double
    Dim center(0 To 2) As Double
    Dim radRatio As Double
    
    ' Create an ellipse in model space
    center(0) = 5#: center(1) = 5#: center(2) = 0#
    majAxis(0) = 10: majAxis(1) = 20#: majAxis(2) = 0#
    radRatio = 0.3
    Set ellObj = ThisDrawing.ModelSpace.AddEllipse(center, majAxis, radRatio)
    
    'Enter a start angle of 45 degrees, and an end angle of 270 degrees
    ellObj.startAngle = 45 * (3.14 / 180)
    ellObj.endAngle = 270 * (3.14 / 180)
    ZoomAll
    MsgBox "The ellipse has a start angle of " & ellObj.startAngle * (180 / 3.14) & " and the end angle of " & ellObj.endAngle * (180 / 3.14) & " degrees.", vbInformation, "StartAngle Example"
End Sub

可视化 LISP：

(vl-load-com)
(defun c:Example_StartAngle()
    ;; This example creates an ellipse and enters the start and
    ;; end angles to create an elliptical arc.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    
    ;; Create an ellipse in model space
    (setq center (vlax-3d-point 5 5 0)
          majAxis (vlax-3d-point 10 20 0)
          radRatio 0.3)
  
    (setq modelSpace (vla-get-ModelSpace doc))  
    (setq ellObj (vla-AddEllipse modelSpace center majAxis radRatio))
    
    ;; Enter a start angle of 45 degrees, and an end angle of 270 degrees
    (vla-put-StartAngle ellObj (* 45 (/ 3.14 180)))
    (vla-put-EndAngle ellObj (* 270 (/ 3.14 180)))
    (vla-ZoomAll acadObj)
    (alert (strcat "This ellipse has a start angle of " (rtos (* (vla-get-StartAngle ellObj) (/ 180 3.14)) 2) " and the end angle of " (rtos (* (vla-get-EndAngle ellObj) (/ 180 3.14)) 2) " degrees."))
)