Extend curve by arc of specified Radius?

hi

i drew this thing in a way which i feel is the wrong or long way.. is there a better way?

basically, i'd like to extend curves with an arc of a specified radius.. i ended up using tangent circles then trimming.. with a few hundred more of these to do, i'd like to see if there's a better way before proceeding..

thanks

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Permalink Reply by Pascal Golay on January 23, 2013 at 10:35am

Hi Jeff- start Extend, with no selection, and Enter to get past the boundary selection stage. Set Type=Arc and then choose the Center option- at this point you can type in the desired radius and then the center pick will be constrained to that distance. Pick the Center you want and extend away. Any luck?

-Pascal

pascal@mcneel.com

Permalink Reply by Jeff Hammond on January 23, 2013 at 10:50am

yeah.. i think that's it.

i had problems getting the extension to remain coplanar with the existing curve but i think i'm figuring it out now.. 

i'm running out for errands now but will be working on this drawing a little later in the day.. i'll report back.

thanks for helping me!

Permalink Reply by Jeff Hammond on January 23, 2013 at 6:51pm

ok.. that works better.

the wording in that command just tripped me up i think.. 

i wish it would remember the input but i like that it stays active after drawing the arc..

(though i can imagine there are reasons as to why it doesn't remember the value each time?)

Permalink Reply by Chris Tietjen on January 23, 2013 at 11:55am

Here's a Grasshopper solution to you problem.  The result is essentially instantaneous once you enter the input curves using a simple window selection box.

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Permalink Reply by Jeff Hammond on January 23, 2013 at 6:53pm

ha.. i'm on mac ;)

can't wait though... i'm always watching grasshopper videos just to get a little head start..

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