Topic: Ok , This is quirky.

[Denzuki]

I have run into an issue that I haven't been able to resolve.

I created a lisp routine that does several things including placing a polyline boundary around several other polylines. The placement is determined by points which I also use the routine to determine (no user input). What's happening is  when the code activates to place the polyline boundary, it is placing 3 of the 6 points according to the input I currently input via dialog box and then it placed the other 3 points per the previous placement. I have tried making the point variables local. I have also tried purging the drawing and shutting the software and computer off and rebooting. I have verified via the command line that the point definitions are what they are supposed to be. I have even tried running the routine three times in a row and each time the polyline boundary referenced 3 points from the previous placement. I've gone through the code line by line and do not see any discrepancies. Any ideas. thanks

[Lee Mac]

Are you supplying the points for the polyline to an AutoCAD command? If so, is Object Snap disabled for the point input?

[Denzuki]

Yes, Osnaps are disabled.

[Denzuki]

and yes it is the Pline command

[Kerry]

Hi Denzuki,
I can't think of anything other than the points discussed.

Reduce your code to the bare minimum that illustrates the error.

I've found that this sometimes helps in locating glitches.

Post the reduced code for someone here to run an eye over.

Regards,
Kerry

ps:
Sounds to me like a list that is being cons'd to that has existing values ... but guesses don't count.

[Denzuki]

thanks, will try to get it posted soon.
BTW, just thinking quirkylike, is there any difference if the pline is being drawn clockwise versus counterclockwise? I'm just trying to think of any reason why.

[Kerry]

... clockwise versus counterclockwise

No distinction that I'm aware of.

[CAB]

In my limited experience most quirkiness is cause by the operator/programmer.

[Denzuki]

Oh CAB, I definitely agree with that statement!!

[squirreldip]

Without seeing the code all of us are stabbing in the dark...

However...  Are the missing points colinear to other points, i.e. a missing point is precisely between two other points?

[Denzuki]

OK, I found it. It had to do with the x and y layout of determining points. I had the y's in the x's place and vice versa and the wrong x or y values being multiplied to the wrong lines of code. I will be more thorough next time. Thanks for all the help though.