GetTransformationMatrix

Syntax

Sap2000.AreaObj.GetTransformationMatrix

VB6 Procedure

Function GetTransformationMatrix(ByVal Name As String, ByRef Value() As Double,Optional ByVal IsGlobal As Boolean = True) As Long

Parameters

Name

The name of an existing area object.

Value

Value is an array of nine direction cosines that define the transformation matrix.

The following matrix equation shows how the transformation matrix is used to convert items from the area object local coordinate system to the global coordinate system.

In the equation, c0 through c8 are the nine values from the transformation array, (Local1, Local2, Local3) are an item (such as a load) in the object local coordinate system, and (GlobalX, GlobalY, GlobalZ) are the same item in the global coordinate system.

The transformation from the local coordinate system to the present coordinate system is the same as that shown above for the global system if you substitute the present system for the global system.

IsGlobal

If this item is True, the transformation matrix is between the Global coordinate system and the area object local coordinate system.

If this item is False, the transformation matrix is between the present coordinate system and the area object local coordinate system.

Remarks

The function returns zero if the area object transformation matrix is successfully retrieved; otherwise it returns a nonzero value.

VBA Example

Sub GetAreaObjectMatrix()
   'dimension variables
      Dim SapObject As Sap2000.SapObject
      Dim SapModel As cSapModel
      Dim ret As Long
      Dim Value() As Double

   'create Sap2000 object
      Set SapObject = New SAP2000.SapObject

   'start Sap2000 application
      SapObject.ApplicationStart

   'create SapModel object
      Set SapModel = SapObject.SapModel

   'initialize model
      ret = SapModel.InitializeNewModel

   'create model from template
      ret = SapModel.File.NewWall(2, 48, 2, 48)

   'assign area object local axis angle
      ret = SapModel.AreaObj.SetLocalAxes("3", 30)

   'get area object transformation matrix
      ReDim Value(8)
      ret = SapModel.AreaObj.GetTransformationMatrix("3", Value)

   'close Sap2000
      SapObject.ApplicationExit False
      Set SapModel = Nothing
      Set SapObject = Nothing
End Sub

Release Notes

Initial release in version 11.00.