ActiveUCS Property （ActiveX）

签名

工 务 局：

object.ActiveUCS

对象

类型：文档

此属性适用的对象。

属性值

只读：不

类型：UCS

图形的活动 UCS。

言论

只有在将 UCS 重置为活动 UCS 后，对当前活动 UCS 所做的更改才会变得可见。

如果在当前 UCS 未保存时尝试获取活动的 UCS 值，则会发生错误。建议您在获取活动的 UCS 值之前确认 UCSNAME 系统变量的值不为空。或者，您可以添加新的 UCS 对象并将其设置为活动，然后再获取活动的 UCS 值。

例子

工 务 局：

Sub Example_ActiveUCS()
    ' This example returns the current saved UCS (or saves a new one dynamically)
    ' and then sets a new UCS.
    ' Finally, it returns the UCS to the previous setting.
    
    Dim newUCS As AcadUCS
    Dim currUCS As AcadUCS
    Dim origin(0 To 2) As Double
    Dim xAxis(0 To 2) As Double
    Dim yAxis(0 To 2) As Double
    
    ' Get the current saved UCS of the active document. If the current UCS is
    ' not saved, then add a new UCS to the UserCoordinateSystems collection
    If ThisDrawing.GetVariable("UCSNAME") = "" Then
        ' Current UCS is not saved so get the data and save it
        With ThisDrawing
            Set currUCS = .UserCoordinateSystems.Add( _
                            .GetVariable("UCSORG"), _
                            .Utility.TranslateCoordinates(.GetVariable("UCSXDIR"), acUCS, acWorld, 0), _
                            .Utility.TranslateCoordinates(.GetVariable("UCSYDIR"), acUCS, acWorld, 0), _
                            "OriginalUCS")
        End With
    Else
        Set currUCS = ThisDrawing.ActiveUCS  'current UCS is saved
    End If
    
    MsgBox "The current UCS is " & currUCS.name, vbInformation, "ActiveUCS Example"
    
    ' Create a UCS and make it current
    origin(0) = 0: origin(1) = 0: origin(2) = 0
    xAxis(0) = 1: xAxis(1) = 1: xAxis(2) = 0
    yAxis(0) = -1: yAxis(1) = 1: yAxis(2) = 0
    Set newUCS = ThisDrawing.UserCoordinateSystems.Add(origin, xAxis, yAxis, "TestUCS")
    ThisDrawing.ActiveUCS = newUCS
    MsgBox "The new UCS is " & newUCS.name, vbInformation, "ActiveUCS Example"
    
    ' Reset the UCS to its previous setting
    ThisDrawing.ActiveUCS = currUCS
    MsgBox "The UCS is reset to " & currUCS.name, vbInformation, "ActiveUCS Example"
End Sub

Visual LISP：

(vl-load-com)
(defun c:Example_ActiveUCS()
    ;; This example returns the current saved UCS (or saves a new one dynamically)
    ;; and then sets a new UCS.
    ;; Finally, it returns the UCS to the previous setting.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    (setq UCSs (vla-get-UserCoordinateSystems doc))
  
    ;; Get the current saved UCS of the active document. If the current UCS is
    ;; not saved, then add a new UCS to the UserCoordinateSystems collection
    (if (= (vlax-variant-value (vla-GetVariable doc "UCSNAME")) "")
        (progn
	           (setq utility (vla-get-Utility doc))
            (setq currUCS (vla-Add UCSs
	                                  (vla-GetVariable doc "UCSORG")
	                                  (vla-TranslateCoordinates utility (vla-GetVariable doc "UCSXDIR") acUCS acWorld :vlax-false)
	                                  (vla-TranslateCoordinates utility (vla-GetVariable doc "UCSYDIR") acUCS acWorld :vlax-false)
	                                  "OriginalUCS"
			                       )
            )
        )
        (setq currUCS (vla-get-ActiveUCS doc))  ;; current UCS is saved
    )
    
    (alert (strcat "The current UCS is " (vla-get-Name currUCS)))
    
    ;; Create a UCS and make it current
    (setq origin (vlax-3d-point 0 0 0)
          xAxis (vlax-3d-point 1 1 0)
          yAxis (vlax-3d-point -1 1 0))

    (setq newUCS (vla-Add UCSs origin xAxis yAxis "TestUCS"))
    (vla-put-ActiveUCS doc newUCS)
    (alert (strcat "The new UCS is " (vla-get-Name newUCS)))
    
    ;; Restore the previous UCS
    (vla-put-ActiveUCS doc currUCS)
    (alert (strcat "The UCS is restored to " (vla-get-Name currUCS)))
)