Cornu spiral or Track transition curve

[Semtex77]

Hello,

is there a way in VW to create a Cornu spiral in 2d?

/w Regards

[RonMan]

No, not that I know of. Some crazy soul could create a script that would implement the math, but I doubt you will find any takers.

RonMan

[grant_PD]

seek and find out the wizard known as Islandmon. He's lurking about this forum somewhere, and there's nothing he doesn't know how to build.

[Semtex77]

Hey Ron and Grant!

Thanks for your answers

I know it is a tough question, sorry.

I hoped there might be already an script to built clothoids.

I need this special kind of curve to get a smooth road because normal curves won t fit in this case and i need it in a parametric kind of way.

Right now i try to figure it out via Javascript but i have no clue how VectorScript is being programmed.

Thanks a lot for your tips

[islandmon]

This is an interesting problem and deserves a VW solution. I checked out the math and started to work on it .. but have some other project issues at the moment.

soon come ; )

[rDesign]

I don't know if any of this helps (because this is so far beyond my abilities), but I found this posting about making clothoids in ACAD: clothoids - open cad format

Tim

[Semtex77]

-Hej Islandmon,

wow it is a really an honour that you you gonna help me out in this case but take your time if you have serious tasks to fulfill. I don t want to bug you guys too hard with that but I hoped that maybe someone else had my issue before and solved it somehow.

But thank you so much in advance

-rDesign

Thanks a lot for your research. Sounds good to me . I already found a lisp-autocad file but i don t have a clue either how to convert it into vector-script.

[islandmon]

Here you go ... enjoy !

CAD_CornuSpiral.mcd

[Semtex77]

Hej Islandmon

thanks a lot Islandmon that was a great help!!!!