Determines whether the given spline is rational.
Supported platforms: Windows only
Read-only: Yes
Type: Boolean
No additional remarks.
VBA:
Sub Example_IsRational()
' This example creates a spline object in model space.
' It then determines whether the spline is rational or non-rational
' based on the IsRational property.
' Create the spline
Dim splineObj As AcadSpline
Dim startTan(0 To 2) As Double
Dim endTan(0 To 2) As Double
Dim fitPoints(0 To 8) As Double
startTan(0) = 0.5: startTan(1) = 0.5: startTan(2) = 0
endTan(0) = 0.5: endTan(1) = 0.5: endTan(2) = 0
fitPoints(0) = 1: fitPoints(1) = 1: fitPoints(2) = 0
fitPoints(3) = 5: fitPoints(4) = 5: fitPoints(5) = 0
fitPoints(6) = 10: fitPoints(7) = 0: fitPoints(8) = 0
Set splineObj = ThisDrawing.ModelSpace.AddSpline(fitPoints, startTan, endTan)
ZoomAll
' Display a message according to the IsRational value for the spline.
If splineObj.IsRational Then
MsgBox "The newly created Spline is a rational Spline", , "IsRational Example"
Else
MsgBox "The newly created Spline is a non-rational Spline", , "IsRational Example"
End If
End Sub
Visual LISP:
(vl-load-com)
(defun c:Example_IsRational()
;; This example creates a Spline object in model space and
;; determines whether the Spline is planar
(setq acadObj (vlax-get-acad-object))
(setq doc (vla-get-ActiveDocument acadObj))
;; Define the Spline object
(setq startTan (vlax-3d-point 0.5 0.5 0)
endTan (vlax-3d-point 0.5 0.5 0)
fitPoints (vlax-make-safearray vlax-vbDouble '(0 . 8)))
(vlax-safearray-fill fitPoints '(0 0 0
5 5 0
10 0 0
)
)
;; Create new Spline object
(setq modelSpace (vla-get-ModelSpace doc))
(setq splineObj (vla-AddSpline modelSpace fitPoints startTan endTan))
(vla-ZoomAll acadObj)
;; Display a message according to the IsRational value for the spline.
(if (= (vla-get-IsRational splineObj) :vlax-true)
(alert "The newly created Spline is a rational Spline")
(alert "The newly created Spline is a non-rational Spline")
)
)