指定椭圆的结束参数。 支持的平台:仅窗口 属性值只读:不 类型:双 有效范围为 0 到。2*PI 言论椭圆的开始和结束参数基于以下公式计算: P(Theta) = A * cos(Theta) + B * sin(Theta) 其中 A 和 B 分别是半长轴和半短轴。 例如,如果您的起始角度为 ,则根据上述公式计算相应的启动参数。同样,如果您的端角为 ,则根据上述公式计算相应的结束参数。Theta1P(Theta1)Theta2P(Theta2) 可以使用角度或参数来创建椭圆。 例子工 务 局: Sub Example_EndParameter()
' This example creates an ellipse and enters the start and
' end parameters 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 parameter of 1.57, and an end parameter of 6.28
ellObj.StartParameter = 1.57
ellObj.EndParameter = 6.28
ZoomAll
' Find the start and end parameters for the ellipse
MsgBox "The ellipse has a start parameter of " & ellObj.StartParameter & " and an end parameter of " & ellObj.EndParameter, vbInformation, "EndParameter Example"
End Sub
Visual LISP: (vl-load-com)
(defun c:Example_EndParameter()
;; This example creates an ellipse and enters the start and
;; end parameters 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 parameter of 1.57, and an end parameter of 6.28
(vla-put-StartParameter ellObj 1.57)
(vla-put-EndParameter ellObj 6.28)
(vla-ZoomAll acadObj)
;; Find the start and end parameters for the ellipse
(alert (strcat "The ellipse has a start parameter of " (rtos (vla-get-StartParameter ellObj) 2) " and an end parameter of " (rtos (vla-get-EndParameter ellObj) 2)))
)
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