Get and Override Mass Properties Example (VBA)

This example shows how to get and override some mass properties of a part.

'-----------------------------------------------------------------------
' Preconditions:
' 1. Ensure the specified document exists.
' 2. Open the Immediate window.
'
' Postconditions: Inspect the Immediate window for the mass properties of
' the part.
'----------------------------------------------------------------------
Dim swApp As SldWorks.SldWorks
Dim Extn As SldWorks.ModelDocExtension
Dim MyMassProp As SldWorks.MassProperty
Dim swModelDoc As SldWorks.ModelDoc2
Dim pmoi As Variant
Dim vValue As Variant
Dim com As Variant
Dim value(2) As Double
Dim errors As Long
Dim warnings As Long
Dim val As Double
Dim params As Variant

Option Explicit
Sub main()

    Set swApp = Application.SldWorks
    Set swModelDoc = swApp.OpenDoc6("c:\Program Files\SolidWorks Corp\SolidWorks\samples\tutorial\api\MassPropertiesDemo.sldprt", swDocPART, swOpenDocOptions_Silent, "", errors, warnings)
    Set Extn = swModelDoc.Extension
   

    ' Create mass properties
    Set MyMassProp = Extn.CreateMassProperty
   

    ' Use document property units (MKS)
    MyMassProp.UseSystemUnits = False
   

    val = MyMassProp.Volume
    Debug.Print "Volume: " & val
    val = MyMassProp.Density
    Debug.Print "Density: " & val
    val = MyMassProp.SurfaceArea
    Debug.Print "Surface area: " & val
  

    Debug.Print ""
    Debug.Print "OverrideMass property is set to " & MyMassProp.OverrideMass
    Debug.Print "Mass is overridden? " & MyMassProp.SetOverrideMassValue(100, swThisConfiguration, Nothing)
    val = MyMassProp.Mass
    Debug.Print "Mass: " & val
    Debug.Print ""
   

    Debug.Print "OverrideCenterOfMass property is set to " & MyMassProp.OverrideCenterOfMass
    value(0) = 0.09
    value(1) = 0.05
    value(2) = 0.06
    com = value
    Debug.Print "Center of mass is overridden? " & MyMassProp.SetOverrideCenterOfMassValue((com), "Coordinate System1", swThisConfiguration, Nothing)
    params = MyMassProp.CenterOfMass
    Debug.Print "Center of mass: X: " & params(0) & " , Y: " & params(1) & ", and Z: " & params(2)
    Debug.Print ""
   

    Debug.Print "OverrideMomentsOfInertia property is set to " & MyMassProp.OverrideMomentsOfInertia
    pmoi = MyMassProp.PrincipleMomentsOfInertia
    Debug.Print "Principal moments of inertia before override: Px: " & pmoi(0) & ", Py: " & pmoi(1) & ", and Pz: " & pmoi(2)
    pmoi(0) = 0.14
    Debug.Print "Principal moments of inertia are overridden? " & MyMassProp.SetOverridePrincipleMomentsOfInertia((pmoi), swThisConfiguration, Nothing)
    pmoi = MyMassProp.PrincipleMomentsOfInertia
    Debug.Print "Principal moments of inertia after override: Px: " & pmoi(0) & ", Py: " & pmoi(1) & ", and Pz: " & pmoi(2)
   

    vValue = MyMassProp.GetMomentOfInertia(0)
    Debug.Print "Moments of inertia before override: Lxx: " & vValue(0) & ", Lxy: " & vValue(1) & ", Lxz: " & vValue(2) & ", Lyx: " & vValue(3) & ", Lyy: " & vValue(4) & ", Lyz: " & vValue(5) & ", Lzx: " & vValue(6) & ", Lzy: " & vValue(7) & ", Lzz: " & vValue(8)
    Debug.Print "Moments of inertia are overridden? " & MyMassProp.SetOverrideMomentsOfInertiaValue(swMomentsOfInertiaReferenceFrame_UserCoordinateSystem, "Coordinate System1", (vValue), swThisConfiguration, Nothing)
    vValue(0) = 0.1
    Debug.Print "Moments of inertia after override: Lxx: " & vValue(0) & ", Lxy: " & vValue(1) & ", Lxz: " & vValue(2) & ", Lyx: " & vValue(3) & ", Lyy: " & vValue(4) & ", Lyz: " & vValue(5) & ", Lzx: " & vValue(6) & ", Lzy: " & vValue(7) & ", Lzz: " & vValue(8)
End Sub