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Hey skibuf, Sorry I wasn't able to help more but I'm glad you guys were able to come up with something that suits your needs. The internet is great for sharing ideas but sometimes there's just no substitute for sitting down right next to somebody, looking at the screen together and working...

skibuf23, To simplify and clarify, I thought I'd make one last brief post. To model a vehicle at the beginning of a curve, assuming the vehicle was traveling in a straight line before entering the curve, use method 2) as described in the above post. Also, if you are starting from a dead stop...

skibuf23, There are essentially two ways to run Turn.lsp. 1) If you are starting your path as a straight line, your vehicle block needs to be parallel with the straight line with the little circle at the center of the left front wheel of the vehicle block sitting on the endpoint. 2) If you...

skibuf23, If you are trying to simulate a vehicle starting a turn from a standstill with a turned steering wheel, then the starting portion of the polyline needs to be an arc. The vehicle block should be tangent to the arc. You'll see a little circle in the center of the left front tire of the...

thread163-240880 Hey everyone, Just wanted to post an update to the above referenced thread pertaining to the open source Turning path tracker (AutoLISP application) Turn.lsp. In the above thread I posted very brief instructions on how to use the lisp routine to model turn radius paths. This...

See previous thread here: http://www.eng-tips.com/viewthread.cfm?qid=240880&page=4

Addendum to the above. I ran the routine at work today and thought I'd add an additional note for clarity. After step 8 above, where you enter "g" for generated vehicle, another promp will appear. Just hit "Enter" at this prompt. This will enter the default which reads <select previously...

I'm assuming you're referring to Turn.lsp by Tom Haws. The routine can be downloaded from his website here: http://www.hawsedc.com/gnu/turn.php also here: http://hawsedc.constructionnotesmanager.com/gnu/turn.php and from the AutoCAD Wiki here...