3 methods draw entities

Lesson 3 -- Drawing the Path Boundary
Drawing AutoCAD Entities

Most AutoLISP programs draw entities using one of several methods:

ActiveX functions
The entmake function
The command function

Can anybody give me sample,how to draw entities by "ActiveX" function,second
and third function I've known it,thanks for your reply.
Best regards
Ade Suharna

 

This will place a new line in the current drawing's modelspace on the
current layer:

(setq pt1 (getpoint "\nSelect line start point: ")
pt2 (getpoint pt1 "\nSelect line end point: "))
(setq newline (vlax-invoke (vla-get-modelspace
(vla-get-activedocument
(vlax-get-acad-object)))
"addLine"
pt1
pt2
))

Good luck!
Jeff

 

Hi Jeff,What wrong ??
(setq pt1 (getpoint "\nSelect line start point: ")
pt2 (getpoint pt1 "\nSelect line end point: "))
(setq newline (vlax-invoke (vla-get-modelspace
(vla-get-activedocument
(vlax-get-acad-object)))
"addLine"
pt1
pt2
))
(18.7673 12.5217 0.0)
; error: no function definition: VLAX-GET-ACAD-OBJECT ;>>>> ????

 

Help to fill in,thanks

(setq pt1 (getpoint "\nSelect line start point: ")
pt2 (getpoint pt1 "\nSelect line end point: "))
(setq newline
(vlax-invoke ; >>>>>> call the specified ActiveX method
(vla-get-modelspace ; >>>>>> ?????
(vla-get-activedocument ; >>>>>> ?????
(vlax-get-acad-object ; >>>>>> Retrieves the top level AutoCAD
; >>>>>> application object for the
current
; >>>>>> AutoCAD session
)))
"addLine" : >>>>>> ?????
pt1
pt2
))

 

First, I should have mentioned that (vl-load-com) needs to be run once in a
drawing before the activex commands can be run. That should eliminate the
error you got.
See below

To break it down further, you could do this:
(setq acad (vlax-get-acad-object))
(setq doc (vla-get-activedocument acad));;This could also be written as
(vlax-get-property acad 'activedocument)
(setq mspace (vla-get-modelspace doc));; OR (vlax-get-property doc
'modelspace)
(setq newline (vlax-invoke mspace "addline" pt1 pt2));; this could also be
written using (vla-addline), but then the pt1 & pt2 lists would need to be
converted to vlax-variants which is a whole 'nother "can of worms".

Hope that helps,
Jeff

 

I've tried in ac 2004 it's OK

 

Very very very thanks a lot Jeff,now my knowledge added again