AddSpline 方法 (ActiveX)
创建二次或三次 NURBS(非均匀有理 B 样条)曲线。 支持的平台:仅限 Windows 签名VBA: RetVal = object.AddSpline(PointsArray, StartTangent, EndTangent) 返回值 (RetVal)类型:样条 新创建的对象。Spline 言论StartTangent 和 EndTangent 参数指定样条两端的切线。默认情况下,样条曲线处于打开状态。只读属性指示样条曲线是打开还是关闭。Closed 例子VBA: Sub Example_AddSpline()
' This example creates a spline object in model space.
' 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
End Sub
可视化 LISP: (vl-load-com)
(defun c:Example_AddSpline()
;; This example creates a spline object in model space.
(setq acadObj (vlax-get-acad-object))
(setq doc (vla-get-ActiveDocument acadObj))
;; Define the spline
(setq startTan (vlax-3d-point 0.5 0.5 0)
endTan (vlax-3d-point 0.5 0.5 0))
(setq fitPoints (vlax-make-safearray vlax-vbDouble '(0 . 8)))
(vlax-safearray-fill fitPoints '(1 1 0
5 5 0
10 0 0
)
)
;; Create the spline
(setq modelSpace (vla-get-ModelSpace doc))
(setq splineObj (vla-AddSpline modelSpace fitPoints startTan endTan))
(vla-ZoomAll acadObj)
)
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