计算曲线长
第一步：在VBAIDE 里先定义 GetCurveLen 宏
Public Sub GetCurveLen()
' 利用VLisp 计算曲线长度
Dim LispPath As String
LispPath = "c:\Getlen.LSP" 'Lisp文件的路径
Dim tempS As String, tempR As Double
tempS = ThisDrawing.GetVariable("users5")
tempR = ThisDrawing.GetVariable("userr5")
Dim obj As AcadEntity, pt As Variant
ThisDrawing.Utility.GetEntity obj, pt, "选择对象:"
ThisDrawing.SetVariable "users5", obj.Handle ' 将对象的句柄放在系统变量里 ThisDrawing.SendCommand "(load " & Chr(34) & Replace(LispPath, "\", "/") & Chr(34) & ")" & vbCr
MsgBox "曲线长度为:" & CStr(ThisDrawing.GetVariable("userr5")) '到userr5里取值
ThisDrawing.SetVariable "users5", tempS '还原系统变量
ThisDrawing.SetVariable "userR5", tempR '还原系统变量
End Sub
第二步：复制下面代码存为*.lsp文件，注意文件名、路径要与上面的lisppath 变量相一致
(defun GetLen( / obj len)
;; 功能:计算曲线长度
(vl-load-com)
(setq obj (vlax-ename->vla-object (handent (getvar "users5"))));;把对对象的句柄放在users5
(setq len (vlax-curve-getDistAtParam obj (vlax-curve-getendParam obj))) (setvar "userr5" len);;把对对象的长度放在userr5
)
(GetLen)
然后运行 GetCurveLen 宏