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Rotate Assembly Component on Axis Using IDragOperator::DragAsUI Example (VBA)

This example shows how to rotate an assembly component about an assembly axis using IDragOperator::DragAsUI.

' Preconditions:
' 1. Assembly document is open.
' 2. Component in the assembly document is selected.
' Postconditions: Transform matrix is set.

Option Explicit
Const PI                As Double = 3.14159
Const RadPerDeg         As Double = PI / 180#

'   DragOperator::TransformType
'       Translation     0
'       Transform is translation-only.
'       Axial rotation  1
'       Transform is rotation-only.
'       General         2
'       Transform can be translation, rotation, or both.
'   DragOperator::DragMode
'       Minimum Move    0
'       Move smallest number of geometries.
'       Maximum Move    1
'       Move geometries rigidly if possible.
'       Relaxation      2
'       Solve geometries using relaxation.

Sub main()

    Dim swApp                   As SldWorks.SldWorks
    Dim swModel                 As SldWorks.ModelDoc2
    Dim swAssy                  As SldWorks.AssemblyDoc
    Dim swDragOp                As SldWorks.DragOperator
    Dim swSelMgr                As SldWorks.SelectionMgr
    Dim swComp(1)               As SldWorks.Component2
    Dim vComp                   As Variant
    Dim swXform                 As SldWorks.MathTransform
    Dim swMathUtil              As SldWorks.MathUtility
    Dim swOriginPt              As SldWorks.MathPoint
    Dim swX_Axis                As SldWorks.MathVector
    Dim nPts(2)                 As Double
    Dim vData                   As Variant
    Dim i                       As Long
    Dim bRet                    As Boolean

    Set swApp = CreateObject("SldWorks.Application")
    Set swModel = swApp.ActiveDoc
    Set swAssy = swModel
    Set swDragOp = swAssy.GetDragOperator
    Set swSelMgr = swModel.SelectionManager
    Set swComp(0) = swSelMgr.GetSelectedObjectsComponent(1)
    Set swComp(1) = swSelMgr.GetSelectedObjectsComponent(2)
    Set swMathUtil = swApp.GetMathUtility

    vComp = swComp

    nPts(0) = 0#
    nPts(1) = 0#
    nPts(2) = 0#

    vData = nPts

    Set swOriginPt = swMathUtil.CreatePoint(vData)

    nPts(0) = 1#
    nPts(1) = 0#
    nPts(2) = 0#
    vData = nPts

    Set swX_Axis = swMathUtil.CreateVector(vData)

    ' This is an incremental rotation,
    ' so angle is always the same.
    Set swXform = swMathUtil.CreateTransformRotateAxis(swOriginPt, swX_Axis, 1# * RadPerDeg)

    bRet = swDragOp.AddComponent(swComp(0), False)
    Debug.Assert bRet

    swDragOp.DynamicClearanceEnabled = False

    ' Axial rotation
    swDragOp.TransformType = 1

    ' Solve by relaxation
    swDragOp.DragMode = 2

    bRet = swDragOp.BeginDrag
    Debug.Assert bRet

    For i = 0 To 500
        bRet = swDragOp.DragAsUI(swXform)
    Next i

    bRet = swDragOp.EndDrag
    Debug.Assert bRet

End Sub

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