circle

Previous Topic Next Topic
 
classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view
|

circle

Jim Son Chou
Hi, All:

 

We are trying to find the radius of curvature of an arch.  Is there a plug
in that can perform this kind of operation?

 

Jim
Reply | Threaded
Open this post in threaded view
|

Re: circle

Jonathan Hilmer
Just in case a plugin doesn't already exist:

There are simpler equations, but I think this is one of the few that
will work in all cases.

r = ( (d^2+e^2) / (4a^2) - f/a )^(1/2)

Where 'r' is the radius and the other variables are 3x3 or 4x4
matrices involving the set of X,Y points.  The matrices are defined at
http://mathworld.wolfram.com/Circle.html, equations #31-34.




On 7/25/06, Jim Son Chou <[hidden email]> wrote:

> Hi, All:
>
>
>
> We are trying to find the radius of curvature of an arch.  Is there a plug
> in that can perform this kind of operation?
>
>
>
> Jim