Create and Transform Mathematical Elliptical Arc Example (VB.NET)
This example shows how to create and transform a mathematical elliptical Arc.
'--------------------------------------------------------------
' Preconditions:
' 1. Create a VB.NET Windows console project.
' 2. Copy and paste this code into the VB.NET project.
' 3. Add a reference to
' install_dir\APISDK\tlb\DraftSight.Interop.dsAutomation.dll.
' 4. Add a reference to System.Windows.Forms.
' 5. Open the Immediate window.
' 6. Start DraftSight.
' 7. Press F5.
'
' Postconditions:
' 1. Connects to DraftSight.
' 2. Gets the active document.
' 3. Creates a mathematical elliptical Arc.
' 4. Gets various mathematical elliptical Arc values.
' 5. Gets the intersection points of the mathematical elliptical Arc
' with a mathematical linear object and plane.
' 6. Sets various values to use to transform the
' mathematical elliptical Arc.
' 7. Applies a mathematical transformation to the
' mathematical elliptical Arc.
' 8. Examine the Immediate window.
'---------------------------------------------------------------
Imports System
Imports DraftSight.Interop.dsAutomation
Imports System.Runtime.InteropServices
Imports System.Windows.Forms
Imports System.Diagnostics
Module Module1
Sub Main()
Dim dsApp As DraftSight.Interop.dsAutomation.Application
'Connects to DraftSight application
dsApp = GetObject(, "DraftSight.Application")
If dsApp Is Nothing Then
Return
End If
'Gets active document
Dim dsDoc As Document = dsApp.GetActiveDocument()
If dsDoc Is Nothing Then
MessageBox.Show("There are no open documents in DraftSight.")
Return
End If
'Aborts any command currently running in DraftSight
'to avoid nested commands
dsApp.AbortRunningCommand()
'Creates a mathematical elliptical Arc
Dim dsMathUtility As MathUtility = dsApp.GetMathUtility()
Dim Center As MathPoint = dsMathUtility.CreatePoint(3.0, 7.0, 0.0)
Dim minorAxis__1 As MathVector = dsMathUtility.CreateVector(1.0, 1.0, 0.0)
Dim majorAxis__2 As MathVector = dsMathUtility.CreateVector(3.0, 1.0, 0.0)
Dim majorRadius As Double = 3.0
Dim minorRadius As Double = 2.0
Dim startAngle As Double = 2.1
Dim endAngle As Double = 1.0
Dim dsMathEllipArc As MathEllipArc = dsMathUtility.CreateEllipArc(Center, majorAxis__2, minorAxis__1, majorRadius, minorRadius, startAngle, _
endAngle)
If dsMathEllipArc Is Nothing Then
Debug.Print("Mathematical elliptical Arc not created.")
Else
Debug.Print("Mathematical elliptical Arc created.")
End If
'Gets length of mathematical elliptical Arc
Dim mathEllipArcLength As Double = dsMathEllipArc.GetLength()
'Gets normal of mathematical elliptical Arc
Dim dsNormal As MathVector = dsMathEllipArc.GetNormal()
'Gets major and minor axes of mathematical elliptical Arc
Dim dsMajorAxis As MathVector = dsMathEllipArc.GetMajorAxis()
Dim dsMinorAxis As MathVector = dsMathEllipArc.GetMinorAxis()
'Gets plane of mathematical elliptical Arc
Dim dsMathPlane As MathPlane = dsMathEllipArc.GetPlane()
'Gets start point of mathematical elliptical Arc
Dim dsStartPoint As MathPoint = dsMathEllipArc.GetStartPoint()
'Gets intersection point of mathematical
'elliptical Arc with a mathematical linear object
Dim dsLinearObject As MathLine = dsMathUtility.CreateLine(1.0, 1.0, 0, 0, 10.0, 12.0, _
dsMathLineType_e.dsMathLineType_Infinite)
Dim intersectionPoint1 As MathPoint = Nothing
Dim intersectionPoint2 As MathPoint = Nothing
Dim result As Integer = dsMathEllipArc.IntersectWithLinearObject(dsLinearObject, intersectionPoint1, intersectionPoint2)
If result = 0 Then
Debug.Print("Mathematical elliptical Arc and linear object do not intersect.")
Else
Debug.Print("Mathematical ellipitcal Arc and linear object do intersect.")
End If
'Gets intersection point of mathematical elliptical Arc with
'a mathematical plane
Dim dsPlaneObject As MathPlane = dsMathUtility.CreateXYPlane()
result = dsMathEllipArc.IntersectWithPlane(dsPlaneObject, intersectionPoint1, intersectionPoint2)
If result = 0 Then
Debug.Print("Mathematical elliptical Arc and plane do not intersect.")
Else
Debug.Print("Mathematical ellipitcal Arc and plane do intersect.")
End If
'Changes major and minor radii
dsMathEllipArc.MajorRadius = 4.0
dsMathEllipArc.MinorRadius = 3.0
'Sets axes of mathematical elliptical Arc
Dim MinorAxis__3 As MathVector = dsMathUtility.CreateVector(2.0, 2.0, 0.0)
Dim MajorAxis__4 As MathVector = dsMathUtility.CreateVector(3.5, 2.3, 0.0)
dsMathEllipArc.SetAxes(MajorAxis__4, MinorAxis__3)
'Sets start angle
dsMathEllipArc.StartAngle = 3.0
'Applies a mathematical transformation to the
'mathematical elliptical Arc
Dim dsProjectionPlane As MathPlane = dsMathUtility.CreateYZPlane()
Dim dsProjectionDirection As MathVector = dsMathUtility.CreateVector(1, 0, 0)
Dim dsProjectionTransformation As MathTransform = dsMathUtility.CreateTransformProjection(dsProjectionPlane, dsProjectionDirection)
dsMathEllipArc.TransformBy(dsProjectionTransformation)
Debug.Print("Mathematical transformation applied to mathematical elliptical Arc.")
End Sub
End Module