RFVertex.CalcNormal

Description

Calculates the normal vector of the vertex.

Syntax

Function RFVertex.CalcNormal(pNormal As RFVector3) As RFErrorCode

The CalcNormal syntax has these parts:

Remarks

• The vertex normal vector is defined by averaging normal vectors of adjacent faces in reference to the current coordinate system of the parent shell to which the vertex belongs. The current coordinate system of a shell can be either local or global which can be set by RFShell.SetCoordinateMode method.
  

Sample

Dim rfErr As RapidForm.RFErrorCode
Dim vtObj As RapidForm.RFVertex

    ' Assign the RFVertex interface object.
    Set vtObj = RapidForm.Vertex
    
    ' Pick a vertex.
    Dim pickedID As RFEntityID
    rfErr = RapidForm.SelectTools.PickEntity(RF_PICK_VERTEX, 1, pickedID)
    
    ' If an error happens, exit the subroutine.
    If rfErr <> RF_SUCCESS Then
        MsgBox RapidForm.Application.GetErrorMessage(rfErr)
        Exit Sub
    End If
    
    rfErr = vtObj.SetID(pickedID)
    
    ' Calculate the normal vector of the vertex.
    Dim nmVec As RFVector3
    rfErr = vtObj.CalcNormal(nmVec)