[讨论]：SPLINE的CLOSED属性不可更改

LADESIGNER

为什么对于Polyline
[php]
(vla-put-closed plineobj :vla-true)
(vla-put-closed plineobj :vla-false)
[/php]
可用，而对于Spline
[php]
(vla-put-closed splineobj :vla-true)
(vla-put-closed splineobj :vla-false)
[/php]
返回
; 错误: ActiveX 服务器返回错误: 类型不匹配。
甚至这样也不行：
[php]
(vla-put-closed splineobj (vla-get-closed splineobj )
[/php]
还是返回
; 错误: ActiveX 服务器返回错误: 类型不匹配。

难道对于Splineclosed属性是只读的？

carrot1983

Closed Property
Specifies whether the 3D polyline, lightweight polyline, polyline, or spline is open or closed.
应该是跟多段线一样的。。。说不定是你哪里出错了。。

LADESIGNER

不会的，试过很多次了。楼主试过可以么？

帮助里是这么说的
Closed Property       
Applies To
3DPoly, LightweightPolyline, Polyline, Spline

Description

Specifies if the 3DPoly, lightweightpolyline, polyline or spline is open or closed.
When you close a spline, you make it tangent continuous at both ends. If the spline's start point and endpoint are already the same, closing the spline makes it tangent continuous at both points.
When you open a closed spline, if the spline's start point and endpoint were the same before the close, this property returns the spline to its original state. The start point and endpoint remain the same but lose their tangent continuity.

When you open a closed spline, if the spline's start point and endpoint were not the same before the close, this property returns the spline to its original state and removes tangent continuity.

明确的说对于SPLNE可用。

晓东工具里有 xdrx_curve_setclosed

调用格式：(xdrx_curve_setclosed <实体或者选择集>)
功    能：封闭曲线
返 回 值：成功返回T 否 NIL
说    明：实体类型：×POLYLINE,SPLINE

不知道是否是用了这个属性。也许只对VLISP是只读的。

雨箭风刀

试了一下中文版，的确有问题。大概是bug，不知道英文板如何。

carrot1983

顺带问一下。怎么实现那个MLine的closed的特性。因为它好像没有这个特性。。。

oracling

这个都有，先学习一下

LADESIGNER

英文版和中文版的内核是一样的。
不知道VBA或VB是否可以。