NumberOfLoops Property (ActiveX)

Gets the number of loops in the hatch boundary.

Supported platforms: Windows only

Signature

VBA:

object.NumberOfLoops

object

Type: Hatch

The object this property applies to.

Property Value

Read-only: Yes

Type: Integer

The number of loops in the hatch boundary.

Remarks

No additional remarks.

Examples

VBA:

Sub Example_NumberOfLoops()
    ' This example creates an associative hatch in model space.
    ' The number of loops in the hatch is then returned.
    
    Dim hatchObj As AcadHatch
    Dim patternName As String
    Dim PatternType As Long
    Dim bAssociativity As Boolean
    
    ' Define the hatch
    patternName = "ANSI31"
    PatternType = 0
    bAssociativity = True
    
    ' Create the associative Hatch object
    Set hatchObj = ThisDrawing.ModelSpace.AddHatch(PatternType, patternName, bAssociativity)
    
    ' Create the outer loop for the hatch.
    ' An arc and a line are used to create a closed loop.
    
    Dim outerLoop(0 To 1) As AcadEntity
    Dim center(0 To 2) As Double
    Dim radius As Double
    Dim startAngle As Double
    Dim endAngle As Double
    center(0) = 5: center(1) = 3: center(2) = 0
    radius = 3
    startAngle = 0
    endAngle = 3.141592
    Set outerLoop(0) = ThisDrawing.ModelSpace.AddArc(center, radius, startAngle, endAngle)
    Set outerLoop(1) = ThisDrawing.ModelSpace.AddLine(outerLoop(0).startPoint, outerLoop(0).endPoint)
        
    ' Append the outer loop to the hatch object
    hatchObj.AppendOuterLoop (outerLoop)
    
    ' Append the first circle as one inner loop
    Dim innerLoop1(0) As AcadEntity
    center(0) = 5: center(1) = 4.5: center(2) = 0
    radius = 1
    Set innerLoop1(0) = ThisDrawing.ModelSpace.AddCircle(center, radius)
    hatchObj.AppendInnerLoop (innerLoop1)
    
    ' Append the second circle as the other inner loop
    Dim innerLoop2(0) As AcadEntity
    radius = 0.5
    Set innerLoop2(0) = ThisDrawing.ModelSpace.AddCircle(center, radius)
    hatchObj.AppendInnerLoop (innerLoop2)
    
    ' Evaluate and display the hatch
    hatchObj.Evaluate
    ThisDrawing.Regen True
    
    ' Find the number of loops in the hatch
    Dim numOfLoops As Integer
    numOfLoops = hatchObj.NumberOfLoops
    MsgBox "The number of loops in the hatch is " & hatchObj.NumberOfLoops, , "NumberOfLoops Example"
               
End Sub

Visual LISP:

(vl-load-com)
(defun c:Example_NumberOfLoops()
    ;; This example creates an associative hatch in model space.
    ;; The number of loops in the hatch is then returned.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    
    ;; Define the hatch
    (setq patternName "ANSI31"
          patternType 0
          bAssociativity :vlax-true)
    
    ;; Create the associative Hatch object
    (setq modelSpace (vla-get-ModelSpace doc))  
    (setq hatchObj (vla-AddHatch modelSpace patternType patternName bAssociativity acHatchObject))
    
    ;; Create the outer loop for the hatch.
    ;; An arc and a line are used to create a closed loop.
    (setq center (vlax-3d-point 5 3 0)  
          radius 3
          startAngle 0
          endAngle 3.141592)

    (setq arc (vla-AddArc modelSpace center radius startAngle endAngle))
    (setq line (vla-AddLine modelSpace (vla-get-StartPoint arc) (vla-get-EndPoint arc)))
  
    (setq outerLoop (vlax-make-safearray vlax-vbObject '(0 . 1)))
    (vlax-safearray-put-element outerLoop 0 arc)
    (vlax-safearray-put-element outerLoop 1 line)
        
    ;; Append the outer loop to the hatch object
    (vla-AppendOuterLoop hatchObj outerLoop)
    
    ;; Append the first circle as one inner loop
    (setq center (vlax-3d-point 5 4.5 0)
          radius 1)

    (setq circle1 (vla-AddCircle modelSpace center radius))

    (setq innerLoop1 (vlax-make-safearray vlax-vbObject '(0 . 0)))
    (vlax-safearray-put-element innerLoop1 0 circle1)
  
    (vla-AppendInnerLoop hatchObj innerLoop1)
    
    ;; Append the second circle as the other inner loop
    (setq radius 0.5)
    (setq innerLoop2 (vlax-make-safearray vlax-vbObject '(0 . 0)))
    (setq circle2 (vla-AddCircle modelSpace center radius))
    (vlax-safearray-put-element innerLoop2 0 circle2)

    (vla-AppendInnerLoop hatchObj innerLoop2)
    (vla-ZoomAll acadObj)
    
    ;; Evaluate and display the hatch
    (vla-Evaluate hatchObj)
    (vla-Regen doc :vlax-true)
    
    ;; Find the number of loops in the hatch
    (setq numOfLoops (vla-get-NumberOfLoops hatchObj))
    (alert (strcat "The number of loops in the hatch is " (itoa numOfLoops)))
)