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Get B-Spline Surface Parameterization Data Example (VB.NET)

This example shows how to get B-spline parameterization data for a selected face or surface.

'----------------------------------------------------------------------------
' Preconditions:
' 1.  Open:

'    <SOLIDWORKS_install_dir>\samples\tutorial\molds\telephone.sldprt
' 2.  Select a face in the graphics area.
' 3.  Open an Immediate Window.
'
' Postconditions:
' View the following parameterization data about the selected surface

' in the Immediate Window:
'
'     * U minimum
'     * U maximum
'     * V minimum
'     * V maximum
'     * Boundary behaviors at U minimum, U maximum, V minimum, V maximum

'       are as defined in swBoundType_e
'     * # of U and V properties
'     * U and V properties as defined in swParameterizationPropertyType_e
'     * U order
'     * V order
'     * # of control point columns
'     * # of control point rows
'     * Control point dimension:
'        3 - non-rational surfaces
'        4 - rational surfaces (weighted control points)
'     * U periodicity
'     * V periodicity
'     * Knot vector in the U direction
'       (# knots = (control point column count) + (U order))
'     * Knot vector in the V direction
'       (# knots = (control point row count) + (V order))
'     * Control point at row=2 and column=3 of the control point matrix
'----------------------------------------------------------------------------
Imports SolidWorks.Interop.sldworks
Imports SolidWorks.Interop.swconst
Imports System
Imports System.Diagnostics

Partial Class SolidWorksMacro

    
Sub main()

        
Dim swModel As ModelDoc2
        
Dim swSelMgr As SelectionMgr
        
Dim swFace As Face2
        
Dim swSurf As Surface
        
Dim swSurfParam As SurfaceParameterizationData
        
Dim swBSurfParam As BSurfParamData
        
Dim sense As Boolean
        Dim UKnots As Object
        Dim VKnots As Object
        Dim vCtrlPts As Object
        Dim i As Integer

        swModel = swApp.ActiveDoc
        swSelMgr = swModel.SelectionManager
        swFace = swSelMgr.GetSelectedObject5(1)
        swSurf = swFace.GetSurface
        swSurfParam = swSurf.Parameterization2
        Debug.Print(
"File = " & swModel.GetPathName)
        Debug.Print(
"  Surface:")
        Debug.Print(
" U minimum is: " & swSurfParam.UMin)
        Debug.Print(
" U minimum bound type is: " & swSurfParam.UMinBoundType)
        Debug.Print(
" U maximum is: " & swSurfParam.UMax)
        Debug.Print(
" U maximum bound type is: " & swSurfParam.UMaxBoundType)
        Debug.Print(
" U property count is: " & swSurfParam.UPropertyNumber)
        
Dim varUProperties As Object
        varUProperties = swSurfParam.UProperties
        Debug.Print(
" U properties: ")
        
For i = 0 To UBound(varUProperties)
            Debug.Print(
"    " & varUProperties(i))
        
Next i

        Debug.Print(
" V minimum is: " & swSurfParam.VMin)
        Debug.Print(
" V minimum bound type is: " & swSurfParam.VMinBoundType)
        Debug.Print(
" V maximum is: " & swSurfParam.VMax)
        Debug.Print(
" V maximum bound type is: " & swSurfParam.VMaxBoundType)
        Debug.Print(
" V property count is: " & swSurfParam.VPropertyNumber)
        
Dim varVProperties As Object
        varVProperties = swSurfParam.VProperties
        Debug.Print(
" V properties: ")
        
For i = 0 To UBound(varVProperties)
            Debug.Print(
"    " & varVProperties(i))
        
Next i

        swBSurfParam = swSurf.GetBSurfParams3(
False, False, swSurfParam, 0.01, sense)

        Debug.Print(
"U order is: " & swBSurfParam.UOrder)
        Debug.Print(
"V order is: " & swBSurfParam.VOrder)
        Debug.Print(
" Control point column count is: " & swBSurfParam.ControlPointColumnCount)
        Debug.Print(
" Control point row count is: " & swBSurfParam.ControlPointRowCount)
        Debug.Print(
" Control point dimension is: " & swBSurfParam.ControlPointDimension)
        Debug.Print(
" U periodicity is: " & swBSurfParam.UPeriodicity)
        Debug.Print(
" V periodicity is: " & swBSurfParam.VPeriodicity)

        UKnots = swBSurfParam.UKnots
        Debug.Print(
"Knot vector in the U direction: ")
        
For i = 0 To UBound(UKnots)
            Debug.Print(UKnots(i))
        
Next i
        VKnots = swBSurfParam.VKnots
        Debug.Print(
"Knot vector in the V direction: ")
        
For i = 0 To UBound(VKnots)
            Debug.Print(VKnots(i))
        
Next i

        
' Get control points in row = 2, column = 3 of the control point matrix
        vCtrlPts = swBSurfParam.GetControlPoints(2, 3)
        Debug.Print(
"Control point at row=2 and column=3: ")
        
For i = 0 To UBound(vCtrlPts)
            Debug.Print(vCtrlPts(i))
        
Next i
    
End Sub


    Public swApp As SldWorks


End Class



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