Locate Apex of Conical Face Example (VBA)

This example shows how to locate the apex of a conical face.

'----------------------------------------------
' Preconditions:
' 1. Open a part or assembly containing a conical face.
' 2. Select the conical face.
' 3. Open the Immediate window.
'
' Postconditions:
' 1. Creates a 3D sketch with a single point at the apex of
'    the conical face.
' 2. Examine the Immediate window.
'
' NOTE: Conical face can be truncated.
'------------------------------------------------

Option Explicit

 

Sub main()

 

    Dim swApp                   As SldWorks.SldWorks

    Dim swMathUtil              As SldWorks.MathUtility

    Dim swModel                 As SldWorks.ModelDoc2

    Dim swSelMgr                As SldWorks.SelectionMgr

    Dim swFace                  As SldWorks.face2

    Dim swSurf                  As SldWorks.surface

    Dim vCone                   As Variant

    Dim nAxis(2)                As Double

    Dim vAxis                   As Variant

    Dim swAxis                  As SldWorks.MathVector

    Dim nOrigin(2)              As Double

    Dim vOrigin                 As Variant

    Dim swOrigin                As SldWorks.MathPoint

    Dim swApex                  As SldWorks.MathPoint

    Dim swApexPt                As SldWorks.SketchPoint

    

    Set swApp = Application.SldWorks

    Set swMathUtil = swApp.GetMathUtility

    Set swModel = swApp.ActiveDoc

    Set swSelMgr = swModel.SelectionManager

    Set swFace = swSelMgr.GetSelectedObject5(1)

    Set swSurf = swFace.GetSurface: Debug.Assert swSurf.IsCone

    

    vCone = swSurf.ConeParams

    

    nOrigin(0) = vCone(0):  nOrigin(1) = vCone(1):  nOrigin(2) = vCone(2)

    vOrigin = nOrigin

    Set swOrigin = swMathUtil.CreatePoint((vOrigin))

    

    nAxis(0) = vCone(3):    nAxis(1) = vCone(4):    nAxis(2) = vCone(5)

    vAxis = nAxis

    Set swAxis = swMathUtil.CreateVector((vAxis))

    

    Set swAxis = swAxis.Scale(vCone(6) / Tan(vCone(7)))

    

    Set swApex = swOrigin.AddVector(swAxis)

    

    Debug.Print "File = " & swModel.GetPathName

    Debug.Print "  origin         = (" & vCone(0) * 1000# & ", " & vCone(1) * 1000# & ", " & vCone(2) * 1000# & ") mm"

    Debug.Print "  axis           = (" & vCone(3) & ", " & vCone(4) & ", " & vCone(5) & ")"

    Debug.Print "  radius         = " & vCone(6) * 1000# & " mm"

    ' 1 radian = 180º/p = 57.295779513º or approximately 57.3º

    Debug.Print "  half angle     = " & vCone(7) * 57.3 & " deg"

    Debug.Print "  Apex           = " & swApex.ArrayData(0) * 1000# & ", " & swApex.ArrayData(1) * 1000# & ", " & swApex.ArrayData(2) * 1000# & ") mm"

    

    swModel.Insert3DSketch2 False

    swModel.SetAddToDB True

    

    Set swApexPt = swModel.CreatePoint2(swApex.ArrayData(0), swApex.ArrayData(1), swApex.ArrayData(2))

    

    swModel.SetAddToDB False

    swModel.Insert3DSketch2 True

End Sub