center of mass revisited

Here's the text of a macro that inserts a point at the CG, and updates it every time the macro is run. To have this update on every rebuild, you would need to re-implement this as a macro feature. There is no way to do this other than manually or with programming.

Beware word wrap:

' ***********************************************************************

Dim swApp As Object Dim objDoc As Object Dim status As Long Dim CG_3DSketch As Object Dim objNewPoint As Object Dim ObjSelectionMgr As Object Dim objSketchToRename As Object Dim objCG_Point As Object Dim objSketch As Object Dim objSketchPoint As Object

Sub main() Set swApp = CreateObject("SldWorks.Application") Set objDoc = swApp.ActiveDoc MassProperties = objDoc.GetMassProperties2(status) On Error Resume Next X_pt = MassProperties(0) If Err 0 Then X_pt = 0 Y_pt = 0 Z_pt = 0 Else Y_pt = MassProperties(1) Z_pt = MassProperties(2) End If On Error GoTo 0

CG_3DSketch_Name = "Center-Of-Gravity" Set CG_3DSketch = objDoc.FeatureByName(CG_3DSketch_Name) On Error Resume Next Junk = CG_3DSketch.Name If Err 0 Then On Error GoTo 0 objDoc.Insert3DSketch objDoc.CreatePoint2 X_pt, Y_pt, Z_pt objDoc.Insert3DSketch Set objNewPoint = objDoc.FeatureByPositionReverse(0) objDoc.FeatureByPositionReverse(0).Name = CG_3DSketch_Name Set objNewPoint = objDoc.FeatureByPositionReverse(0) objDoc.EditRebuild Else On Error GoTo 0 objDoc.SelectById CG_3DSketch_Name, "SKETCH", 0, 0, 0 objDoc.EditSketch Set objSketch = objDoc.GetActiveSketch2 SketchPointArray = objSketch.GetSketchPoints PointCount = UBound(SketchPointArray) + 1 For i = 0 To (PointCount - 1) Set objSketchPoint = SketchPointArray(i) Junk = objSketchPoint.SetCoords(X_pt, Y_pt, Z_pt) Next i objDoc.EditRebuild End If End Sub

Thanks!

Dale Dunn wrote:

I have one written by someone else that does almost the same thing, only it doesn't update the existing point - it either puts a new point in the existing sketch, or if you have renamed that sketch, it adds another sketch. I can see benefits to both. Maybe merge the two together with options?

WT