Topic: Center of curve

[Gliderider]

I'm attempting to write a routine to return the PI (point of intersection) of a curve (either simple arc or polyline arc). I was hoping someone could give some direction on how to return the radius point of a poyline arc.
Thanks

[Gliderider]

Never mind... I was trying to make it harder than it needed to be, sometimes you can't see the forest for the trees...
sorted it with

Code: [Select]

(setq ent (entsel)
        pt  (osnap (cadr ent) "nea")
crv-rp (osnap pt "cen"))


[cjw]

how to return the radius point of a poyline arc.

hopes this link can help you...
http://www.afralisp.net/lisp/Bulges1.htm

[TimSpangler]

how to return the radius point of a poyline arc.

Are you talking about the center point?

[Gliderider]

Yes, Center point/Radius point; tomato, tomahto

[Daniel J. Ellis]

i.e. one's right, one's wrong? lol

DJE

[Mark]

Here's a fine tutorial from Mr. Madsen.

http://www.theswamp.org/index.php?topic=467.0

[Gliderider]

Thanks Mark and Mr. Madsen, that's very informative. I always wondered what 'Parameters' were.