Convert Arrays to Variants

From AutoCAD ActiveX

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Use Variants for Array Data

Use Variants in Methods and Properties

Interpret Variant Arrays

ActiveX Automation Basics > Use Variants in Methods and Properties >

Convert Arrays to Variants

AutoCAD ActiveX Automation provides a utility method to convert an array of data into a variant. This method is the CreateTypedArray method, which creates a variant that contains an array of integers, floating numbers, doubles, and so forth. You can pass the resulting variant into any AutoCAD method or property that accepts an array of numbers as a variant.

The CreateTypedArray method takes as input the type of values that are in the array, and the array of data to be converted. It returns the array of values as a variant.

Create a spline with the CreateTypedArray method

The following code converts three arrays using CreateTypedArray: the coordinates for a spline's fit points, and the start and end tangent of the spline. It then passes the variant into the AddSpline method to create the spline.

Sub Ch2_CreateSplineUsingTypedArray()

    ' This example creates a spline object in model space

    ' using the CreateTypedArray method.

    Dim splineObj As AcadSpline

    Dim startTan As Variant

    Dim endTan As Variant

    Dim fitPoints As Variant

          Dim utilObj As Object   ' late bind the Utility object
          Set utilObj = ThisDrawing.Utility
                ' Define the Spline Object
          utilObj.CreateTypedArray _
       startTan, vbDouble, 0.5, 0.5, 0
          utilObj.CreateTypedArray _
       endTan, vbDouble, 0.5, 0.5, 0
          utilObj.CreateTypedArray _
       fitPoints, vbDouble, 0, 0, 0, 5, 5, 0, 10, 0, 0
                Set splineObj = ThisDrawing.ModelSpace.AddSpline _
       (fitPoints, startTan, endTan)
                ' Zoom in on the newly created spline
          ZoomAll
            End Sub

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