Exploding objects converts the objects from single objects to their constituent parts but has no visible effect.
For example, exploding forms simple lines and arcs from 3D polygons, polylines, polygon meshes, and regions. It replaces a block reference with copies of the simple objects that compose the block.
This example creates a lightweight polyline object. It then explodes the polyline into separate objects. The example then loops through the resulting objects and displays a message box containing the name of each object and its index in the list of exploded objects.
Sub Ch4_ExplodePolyline()
Dim plineObj As AcadLWPolyline
Dim points(0 To 11) As Double
' Define the 2D polyline points
points(0) = 1: points(1) = 1
points(2) = 1: points(3) = 2
points(4) = 2: points(5) = 2
points(6) = 3: points(7) = 2
points(8) = 4: points(9) = 4
points(10) = 4: points(11) = 1
' Create a light weight Polyline object
Set plineObj = ThisDrawing.ModelSpace.AddLightWeightPolyline(points)
' Set the bulge on one segment to vary the
' type of objects in the polyline
plineObj.SetBulge 3, -0.5
plineObj.Update
' Explode the polyline
Dim explodedObjects As Variant
explodedObjects = plineObj.Explode
' Loop through the exploded objects
' and display a message box with
' the type of each object
Dim I As Integer
For I = 0 To UBound(explodedObjects)
explodedObjects(I).Update
MsgBox "Exploded Object " & I & ": " & explodedObjects(I).ObjectName
explodedObjects(I).Update
Next
End Sub