CAD开发者社区 › 首页 ›AutoCAD开发文档› AutoCAD 2020 开发者帮助 › 查看内容

AutoCAD 2020 开发者帮助

ElevateOrder 方法（ActiveX）

2024-5-18 18:20| 发布者: admin| 查看: 91| 评论: 0|原作者: admin|来自: AutoCAD

将样条曲线的顺序提升到给定顺序。

支持的平台：仅限 Windows

签名

VBA：

object.ElevateOrder Order

对象

类型：样条曲线

此方法应用到的对象。

次序

访问：仅输入

类型：整数

大于当前订单的正值。最大订单为 26。

返回值（RetVal）

无返回值。

言论

样条曲线的阶数等于样条曲线的阶数加一（+1）。可以使用属性查询样条的度数。Degree

输入大于当前值的值会均匀地增加样条曲线上的控制点数，以实现更局部的控制。样条阶一旦提升，就不能减少。

当样条曲线被抬高时，该样条曲线将从插值（拟合）样条转换为控制点样条曲线。这意味着在高程之后，样条不再具有拟合切线，并且样条的和属性不再可用。编辑控制点样条曲线的唯一方法是通过属性或 or 方法。StartTangentEndTangentControlPointsSetControlPointGetControlPoint

例子

VBA：

Sub Example_ElevateOrder()
    ' This example creates a spline object in model space.
    ' It then elevates the order of the spline.

    ' 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
    MsgBox "The current order of the spline is " & splineObj.Degree + 1, , "ElevateOrder Example"
    
    ' Elevate the order of the spline
    splineObj.ElevateOrder (splineObj.Degree + 10)
    ThisDrawing.Regen True
    MsgBox "The order of the spline has been raised to " & splineObj.Degree + 1, , "ElevateOrder Example"
    
End Sub

可视化 LISP：

(vl-load-com)
(defun c:Example_ElevateOrder()
    ;; This example creates a spline object in model space.
    ;; It then elevates the order of the spline.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
  
    ;; Create the spline
    (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 '(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)
  
    (alert (strcat "The current order of the spline is " (itoa (1+ (vla-get-Degree splineObj)))))
    
    ;; Elevate the order of the spline
    (vla-ElevateOrder splineObj (+ (vla-get-Degree splineObj) 10))
    (vla-Regen doc :vlax-true)
    (alert (strcat "The order of the spline has been raised to " (itoa (1+ (vla-get-Degree splineObj)))))
)