Adding Text to a DXF file

[johnggold]

I write machine control software in C - directly generating stripped down simple DXF files in R12 export format.

 

Normally only LINE and ARC functions are required as the output is a series of enclosed convex polygons consisting of straight lines, arcs.

 

For one application, I have been requested to add a label to each polygon in its centre.

 

I need a basic AutoCAD command that writes text to an X,Y coordinate position, and that is R12 compatible.

 

Thanks.

[BlackBox]

I believe this AutoLISP command will work:

 

(command "._text" '([color=red]xCoord[/color] [color=red]yCoord[/color]) [color=red]TextHeight[/color] [color=red]RotationAngle[/color] [color=red]TextString[/color] "" "")

 

 

Just replace the red place holders with the described values you require.

[fuccaro]

That lisp will insert a piece of string using the current text style. Since the text style may or may not contain the text height, a problem will occur if Autolisp doesn't send the data as are expected.

Johnggold, it must be an AutoCAD command? If you write the file with your C program and assuming we are talking about an ASCII dxf file, you could put in something like this:

(0 . "TEXT")

(1 . "Blah-blah... content goes here")

(8 . "Layer name")

(10 Xposition Yposition)

 

For short text, this is the shortest DXF lisp (I think). There is no Zpozition in the last line, you asked for R12.

 

I didn't test it, but it should work.

[johnggold]

Thanks. I will try that. zposition is not needed as its all 2D.

[fuccaro]

In the mean time I tested the solution I proposed. Well, the information is correct, but the topic is "AutoLisp like". With other words: it will not work in that form. Try this:

  0
TEXT
10
Xpos
20
Ypos
 1
text goes here

Searching for the minimal code, I see that also it worked without the layer code. The text goes on the layer 0