Spiral Stair LISP

[miles150]

where can I find the .lisp that will detail a spiral stair?

[ReMark]

This thread is six years old. If someone had a lisp routine that could automatically create a spiral stair I think they would have posted it by now.

 

Were you looking to create it in 2D or 3D?

[BIGAL]

Yes there is a lisp but its a bit of a cheat as it was done for a demo, back to the spiral though all you need is to draw 1 tread in full 3d then just simply copy & rotate then move to correct z. The code was done in 1991 I need to add a helix option now so the hand rail will be correct.

Edited January 29, 2016 by BIGAL

[Bill Tillman]

Unless you're doing some very repetitive, I'd skip LISP and just layout your stairs. Whether it's 2D or 3D, a LISP program to do spiral stairs is not an easy undertaking. But if you've got the time, then go for it. Just did a quick google search and the topic is covered out there as well as in this forum.

 

Here is one that should get you started.

[SLW210]

I moved the posts to the AutoLISP, Visual LISP & DCL Forum for you.

[BIGAL]

LISP program to do spiral stairs is not an easy undertaking

Sorry Bill to produce the 3d image I posted is 18 lines of code. Helix was not available at the time of writing 1991. Will have a look at your post link.