ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / EnvelopeBuilderEx Class / Expand Method / Expand(Double,Double,Double,Boolean) Method
Change in x
Change in y
Change in z
If asRatio = true, the expansion is multiplicative. If false, the expansion is additive.

In This Topic
    Expand(Double,Double,Double,Boolean) Method
    In This Topic
    Moves the X, Y and Z coordinates of the envelope sides toward or away from each other to scale the size of the envelope.
    Syntax
    public void Expand( 
       double dx,
       double dy,
       double dz,
       bool asRatio
    )
    Public Overloads Sub Expand( _
       ByVal dx As Double, _
       ByVal dy As Double, _
       ByVal dz As Double, _
       ByVal asRatio As Boolean _
    ) 

    Parameters

    dx
    Change in x
    dy
    Change in y
    dz
    Change in z
    asRatio
    If asRatio = true, the expansion is multiplicative. If false, the expansion is additive.
    Exceptions
    ExceptionDescription
    This geometry is not Z-Aware.
    ZMin or ZMax is NaN.
    Remarks
    If asRatio = false, the expansion is additive. If you want to increase the envelope width by 5 units, then dx = 5. On the other hand, if you want to decrease the envelope width by 5 units, then dx = -5. Similarly, set dy to increase or decrease the envelope height and dz to increase or decrease the envelope depth.

    If asRatio = true, the expansion is multiplicative. If you want to increase the envelope width by 10%, then dx = 1.1. On the other hand, if you want to decrease the width by 10%, then dx = 0.9. Similarly, set dy to increase or decrease the envelope height and dz to increase or decrease the envelope depth. No negative numbers are allowed when asRatio is set to true.

    The Envelope remains centered at the same position.

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also