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Get Assembly Bounding Box Using Components Example (VB.NET)

This example shows how to get a bounding box for an assembly.

'--------------------------------------------
' Preconditions:
' 1. Open an assembly document.
' 2. Ensure that all components in the assembly are fully resolved.
' 3. Open the Immediate window.
' 4. Run the macro.
'
' Postconditions:
' 1. Adds a 3D sketch to the assembly showing the bounding box.
' 2. Examine the graphics area and Immediate window to verify.
'
' NOTES:
' * Because all assembly component bounding boxes are
'   approximated, the bounding box for the assembly
'   is also approximated.
' * Resulting bounding box is oriented with the assembly
'   coordinate system.
'----------------------------------------------
Imports SolidWorks.Interop.sldworks
Imports SolidWorks.Interop.swconst
Imports System.Runtime.InteropServices
Imports System
Imports System.Diagnostics
 
Partial Class SolidWorksMacro
 
    Function GetMax(ByVal Val1 As DoubleByVal Val2 As DoubleByVal Val3 As DoubleAs Double
        ' Finds maximum of 3 values
        GetMax = Val1
        If Val2 > GetMax Then
            GetMax = Val2
        End If
        If Val3 > GetMax Then
            GetMax = Val3
        End If
    End Function

    Function GetMin(ByVal Val1 As DoubleByVal Val2 As DoubleByVal Val3 As DoubleAs Double
        ' Finds minimum of 3 values
        GetMin = Val1
        If Val2 < GetMin Then
            GetMin = Val2
        End If
        If Val3 < GetMin Then
            GetMin = Val3
        End If
    End Function

    Public Sub Main()
 
        Const MaxDouble As Double = 1.79769313486231E+308
        Const MinDouble As Double = -1.79769313486231E+308
        Dim swModel As ModelDoc2
        Dim swAssy As AssemblyDoc
        Dim swConfigurationMgr As ConfigurationManager
        Dim swConfig As Configuration
        Dim swRootComp As Component2
        Dim vChild As Object
        Dim swChildComp As Component2
        Dim vBox As Object
        Dim X_max As Double
        Dim X_min As Double
        Dim Y_max As Double
        Dim Y_min As Double
        Dim Z_max As Double
        Dim Z_min As Double
        Dim swSketchMgr As SketchManager
        Dim swSketchPt(8) As SketchPoint
        Dim swSketchSeg(12) As SketchSegment
        Dim i As Integer
 
        swApp = CreateObject("SldWorks.Application")
        swModel = swApp.ActiveDoc
        swAssy = swModel
        swConfigurationMgr = swModel.ConfigurationManager
        swConfig = swConfigurationMgr.ActiveConfiguration
        swRootComp = swConfig.GetRootComponent3(True)
 
 
        ' Initialize values
        X_max = MinDouble
        X_min = MaxDouble
        Y_max = MinDouble
        Y_min = MaxDouble
        Z_max = MinDouble
        Z_min = MaxDouble
 
        vChild = swRootComp.GetChildren
        For i = 0 To UBound(vChild)
            swChildComp = vChild(i)
            If swChildComp.Visible = swComponentVisibilityState_e.swComponentVisible Then
                vBox = swChildComp.GetBox(FalseFalse)
                X_max = GetMax(vBox(0), vBox(3), X_max)
                X_min = GetMin(vBox(0), vBox(3), X_min)
                Y_max = GetMax(vBox(1), vBox(4), Y_max)
                Y_min = GetMin(vBox(1), vBox(4), Y_min)
                Z_max = GetMax(vBox(2), vBox(5), Z_max)
                Z_min = GetMin(vBox(2), vBox(5), Z_min)
            End If
        Next i
 
        Debug.Print("Assembly Bounding Box (" + swModel.GetPathName + ") = ")
        Debug.Print("  (" + Str(X_min * 1000.0#) + "," + Str(Y_min * 1000.0#) + "," + Str(Z_min * 1000.0#) + ") mm")
        Debug.Print("  (" + Str(X_max * 1000.0#) + "," + Str(Y_max * 1000.0#) + "," + Str(Z_max * 1000.0#) + ") mm") 
        swSketchMgr = swModel.SketchManager

        swSketchMgr.Insert3DSketch(True)
        swSketchMgr.AddToDB = True
 

 
        ' Draw points at each corner of bounding box
        swSketchPt(0) = swSketchMgr.CreatePoint(X_min, Y_min, Z_min)
        swSketchPt(1) = swSketchMgr.CreatePoint(X_min, Y_min, Z_max)
        swSketchPt(2) = swSketchMgr.CreatePoint(X_min, Y_max, Z_min)
        swSketchPt(3) = swSketchMgr.CreatePoint(X_min, Y_max, Z_max)
        swSketchPt(4) = swSketchMgr.CreatePoint(X_max, Y_min, Z_min)
        swSketchPt(5) = swSketchMgr.CreatePoint(X_max, Y_min, Z_max)
        swSketchPt(6) = swSketchMgr.CreatePoint(X_max, Y_max, Z_min)
        swSketchPt(7) = swSketchMgr.CreatePoint(X_max, Y_max, Z_max)
 
        ' Draw bounding box
        swSketchSeg(0) = swSketchMgr.CreateLine(X_min, Y_min, Z_min, X_max, Y_min, Z_min)
        swSketchSeg(1) = swSketchMgr.CreateLine(X_max, Y_min, Z_min, X_max, Y_min, Z_max)
        swSketchSeg(2) = swSketchMgr.CreateLine(X_max, Y_min, Z_max, X_min, Y_min, Z_max)
        swSketchSeg(3) = swSketchMgr.CreateLine(X_min, Y_min, Z_max, X_min, Y_min, Z_min)
        swSketchSeg(4) = swSketchMgr.CreateLine(X_min, Y_min, Z_min, X_min, Y_max, Z_min)
        swSketchSeg(5) = swSketchMgr.CreateLine(X_min, Y_min, Z_max, X_min, Y_max, Z_max)
        swSketchSeg(6) = swSketchMgr.CreateLine(X_max, Y_min, Z_min, X_max, Y_max, Z_min)
        swSketchSeg(7) = swSketchMgr.CreateLine(X_max, Y_min, Z_max, X_max, Y_max, Z_max)
        swSketchSeg(8) = swSketchMgr.CreateLine(X_min, Y_max, Z_min, X_max, Y_max, Z_min)
        swSketchSeg(9) = swSketchMgr.CreateLine(X_max, Y_max, Z_min, X_max, Y_max, Z_max)
        swSketchSeg(10) = swSketchMgr.CreateLine(X_max, Y_max, Z_max, X_min, Y_max, Z_max)
        swSketchSeg(11) = swSketchMgr.CreateLine(X_min, Y_max, Z_max, X_min, Y_max, Z_min)
 
        swSketchMgr.AddToDB = False
        swSketchMgr.Insert3DSketch(True)
 
 
    End Sub
 
    ''' <summary>
    ''' The SldWorks swApp variable is pre-assigned for you.
    ''' </summary>
    Public swApp As SldWorks
 
 
End Class


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