Calculate Transformations in Part Example (VBA)

This example shows how to calculate transformations between solid bodies in a part, which would make one solid body coincide with another solid body if the transformation matrix is applied.

'--------------------------------------------------------------
' Preconditions:
' 1. Ensure that the specified part file to
'    open exists.
' 2. Open the Immediate window.
' 3. Run the macro.
'
' Postconditions:
' 1. Opens the specified part file.
' 2. Gets the solid bodies in the specified part file.
' 3. Iterates through the solid bodies in the part
'    and calculates transformations between solid
'    bodies.
' 4. Examine the Immediate window.
'----------------------------------------------------------------
Option Explicit

Sub main()

    Dim swApp As SldWorks.SldWorks
    Dim swModel As SldWorks.ModelDoc2
    Dim swModelDocExt As SldWorks.ModelDocExtension
    Dim swSelMgr As SldWorks.SelectionMgr
    Dim file As String
    Dim status As Long
    Dim warnings As Long

    Set swApp = Application.SldWorks    

    file = "C:\Users\Public\Documents\SOLIDWORKS\SOLIDWORKS 2017\tutorial\routing-pipes\routes\Framework (Done).SLDPRT"
    Set swModel = swApp.OpenDoc6(file, swDocPART, swOpenDocOptions_Silent, "", status, warnings)
    If swModel Is Nothing Then Exit Sub    

    Set swModelDocExt = swModel.Extension
    Set swSelMgr = swModel.SelectionManager
    Dim swPart As SldWorks.PartDoc
    Set swPart = swModel
       

    Dim bodies As Variant
    Dim swBody_A As SldWorks.Body2
    Dim swBody_B As SldWorks.Body2

    'Get solid bodies
    Dim bodyType As swBodyType_e
    Dim visibleOnly As Boolean
    bodyType = swSolidBody
    visibleOnly = True
    bodies = swPart.GetBodies2(bodyType, visibleOnly)
    'Iterate through the solid bodies in the part
    'and calculate the transformation matrix between
    'swBody_A and swBody_B 
    'coincide when possible
    If Not IsEmpty(bodies) Then
        Dim i As Long
        Dim j As Long
        Dim maxIndex As Long
        maxIndex = UBound(bodies)
        For i = 0 To maxIndex
            Set swBody_A = bodies(i)
            For j = 0 To maxIndex
                If i <> j Then
                    Set swBody_B = bodies(j)                

                    Dim swXfm As MathTransform
                    Dim bResult As Boolean
                    Set swXfm = Nothing
                    bResult = False
                    bResult = swBody_A.GetCoincidenceTransform2(swBody_B, swXfm)                    

                    Debug.Print i & " -> " & j, swBody_A.Name & " -> " & swBody_B.Name

                    If bResult <> False Then
                        Debug.Print vbTab & "Can coincide."
                        Dim vXfm As Variant
                        vXfm = swXfm.ArrayData
                        Debug.Print vbTab & "Rotation:"
                        Debug.Print vbTab & vXfm(0), vXfm(1), vXfm(2)
                        Debug.Print vbTab & vXfm(3), vXfm(4), vXfm(5)
                        Debug.Print vbTab & vXfm(6), vXfm(7), vXfm(8)
                        Debug.Print vbTab & "Translation:"
                        Debug.Print vbTab & vXfm(9), vXfm(10), vXfm(11)
                        Debug.Print vbTab & "Scaling: " & vXfm(12)
                        

                    Else
                        Debug.Print vbTab & "Cannot coincide."
                    End If
                End If
            Next j
        Next i
    End If
    
End Sub