AltUnitsPrecision Property (ActiveX)

Specifies the number of decimal places in alternate units.

Supported platforms: Windows only

Signature

VBA:

object.AltUnitsPrecision

object

Type: DimAligned, DimArcLength, DimDiametric, DimOrdinate, DimRadial, DimRadialLarge, DimRotated

The objects this property applies to.

Property Value

Read-only: No

Type: acDimPrecision enum

Use one of the following constants to specify precision:

• acDimPrecisionZero: 0.
• acDimPrecisionOne: 0.0
• acDimPrecisionTwo: 0.00
• acDimPrecisionThree: 0.000
• acDimPrecisionFour: 0.0000
• acDimPrecisionFive: 0.00000
• acDimPrecisionSix: 0.000000
• acDimPrecisionSeven: 0.0000000
• acDimPrecisionEight: 0.00000000

Remarks

The initial value for this property is acDimPrecisionTwo.

Note: This property overrides the value of the DIMALTD system variable for the given dimension.

Examples

VBA:

Sub Example_AltUnitsPrecision()
    ' This example creates an aligned dimension in model space and
    ' uses AltUnitsPrecision to allow the user to change the
    ' precision of the alternate dimension

    Dim dimObj As AcadDimAligned
    Dim point1(0 To 2) As Double, point2(0 To 2) As Double
    Dim location(0 To 2) As Double
    Dim oldPrecision As String, newPrecision As String
    
    ' Define the dimension
    point1(0) = 0: point1(1) = 5: point1(2) = 0
    point2(0) = 5.12345678: point2(1) = 5: point2(2) = 0
    location(0) = 5: location(1) = 7: location(2) = 0
    
    ' Create an aligned dimension object in model space
    Set dimObj = ThisDrawing.ModelSpace.AddDimAligned(point1, point2, location)
    
    ' Enable alternate unit display
    dimObj.AltUnits = True
    
    ThisDrawing.Application.ZoomAll

    ' Store old Precision value as default for input box
    oldPrecision = dimObj.AltUnitsPrecision
    
    ' Allow the user to change the precision for the alternate dimension
    newPrecision = InputBox("Enter a new precision for the alternate dimension.  The value must range from 0 to 8.", "Alternate Dimension Precision", oldPrecision)
    
    Select Case newPrecision
        Case 0: newPrecision = acDimPrecisionZero
        Case 1: newPrecision = acDimPrecisionOne
        Case 2: newPrecision = acDimPrecisionTwo
        Case 3: newPrecision = acDimPrecisionThree
        Case 4: newPrecision = acDimPrecisionFour
        Case 5: newPrecision = acDimPrecisionFive
        Case 6: newPrecision = acDimPrecisionSix
        Case 7: newPrecision = acDimPrecisionSeven
        Case 8: newPrecision = acDimPrecisionEight
        Case Else
            MsgBox "The alternate precision has not been changed."
            Exit Sub
    End Select
    
    dimObj.AltUnitsPrecision = newPrecision   ' Commit changes to precision
    
    ThisDrawing.Regen acAllViewports
    
    ' Read back and display the alternate dimension precision
    newPrecision = dimObj.AltUnitsPrecision
    MsgBox "The alternate dimension precision has been set to " & newPrecision & " decimal places"
End Sub

Visual LISP:

(vl-load-com)
(defun c:Example_AltUnitsPrecision()
    ;; This example creates an aligned dimension in model space and
    ;; uses AltUnitsPrecision to allow the user to change the
    ;; precision of the alternate dimension
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
  
    ;; Define the dimension
    (setq point1 (vlax-3d-point 0 5 0)
          point2 (vlax-3d-point 5.12345678 5 0)
          location (vlax-3d-point 5 7 0))

    ;; Create an aligned dimension object in model space
    (setq modelSpace (vla-get-ModelSpace doc))
    (setq dimObj (vla-AddDimAligned modelSpace point1 point2 location))
    
    ;; Enable alternate unit display
    (vla-put-AltUnits dimObj :vlax-true)
    
    (vla-ZoomAll acadObj)

    ;; Store old Precision value as default for input box
    (setq oldPrecision (vla-get-AltUnitsPrecision dimObj))
    
    ;; Allow the user to change the precision for the alternate dimension
    (if (= (setq newPrecision (getint "\nEnter a new precision for the alternate dimension (0-8): ")) nil) (setq newPrecision oldPrecision))
    
    (cond
      ((= newPrecision 0)(setq newPrecision acDimPrecisionZero))
      ((= newPrecision 1)(setq newPrecision acDimPrecisionOne))
      ((= newPrecision 2)(setq newPrecision acDimPrecisionTwo))
      ((= newPrecision 3)(setq newPrecision acDimPrecisionThree))
      ((= newPrecision 4)(setq newPrecision acDimPrecisionFour))
      ((= newPrecision 5)(setq newPrecision acDimPrecisionFive))
      ((= newPrecision 6)(setq newPrecision acDimPrecisionSix))
      ((= newPrecision 7)(setq newPrecision acDimPrecisionSeven))
      ((= newPrecision 8)(setq newPrecision acDimPrecisionEight))
      ((progn (alert "The alternate precision has not been changed.")(setq newPrecision oldPrecision)))
    )
    
    (vla-put-AltUnitsPrecision dimObj newPrecision)   ;; Commit changes to precision
    
    (vla-Regen doc acAllViewports)
    
    ;; Read back and display the alternate dimension precision
    (setq newPrecision (vla-get-AltUnitsPrecision dimObj))
    (alert (strcat "The alternate dimension precision has been set to " (itoa newPrecision) " decimal places."))
)