Set transform of derived part in part document

<?xml encoding=”UTF-8″>By Adam Nagy

In theory you should be able to just move a derived part component inside the host part document using DerivedPartTransformDef.SetTransformation(). This does change the transformation of the DerivedPartTransformDef object but not the derived component itself. You can solve this issue by assigning the modified DerivedPartTransformDef object back to DerivedPartComponent.Definition:

Sub ChangeTranformation()
Dim oApp As Inventor.Application
Set oApp = ThisApplication
Dim oDoc As PartDocument
Set oDoc = oApp.ActiveDocument
Dim oCD As PartComponentDefinition
Set oCD = oDoc.ComponentDefinition
Dim oFeat As PartFeature
Set oFeat = oCD.Features(1)
If oFeat.Type = kReferenceFeatureObject Then
Dim oRef As ReferenceFeature
Set oRef = oFeat
Debug.Print oRef.name & "   " & oRef.Type
Dim oRefComps As ReferenceComponents
Set oRefComps = oCD.ReferenceComponents
Dim oDeComp As DerivedPartComponent
Set oDeComp = oRefComps.DerivedPartComponents(1)
Dim oTrDef As DerivedPartTransformDef
Set oTrDef = oDeComp.Definition
Dim oMat As Matrix
Call oTrDef.GetTransformation(oMat, False)
Dim oGeom As TransientGeometry
Set oGeom = ThisApplication.TransientGeometry
Dim oMatDelta As Matrix
Set oMatDelta = oGeom.CreateMatrix
Dim oVect As Vector
Set oVect = oGeom.CreateVector(2, 0, 0)
Call oMatDelta.SetTranslation(oVect, False)
Call oMat.PostMultiplyBy(oMatDelta)
' SetTransformation has no affect ...
Call oTrDef.SetTransformation(oMat, False)
' ... until you assign it back ...
oDeComp.Definition = oTrDef
' Updating the doc should not do any harm,
' but might not be needed
oDoc.Update
End If
End Sub