I need another script

[Builder Boy]

Is there a plugin to do this, and all I have to do, is specify the length from the endpoint to the arc start point?

[TIG]

To what exactly
If you already have the 3D set of edges I suspect that you simply want to fillet the corners
There are several 'fillet' plugins available already...
My '2D Tools' contains a '2D Fillet' tool, BUT it is one of the tools in the set that actually works in 3D too...
So to use that you'd simply activate the tool, enter the desired radius for the fillet [in the VCB] and pick the two edges forming the corner, repeat for each corner. There is no need to change the radius between fillets unless you want to do so... When you're done you'll have a guide-point at each arc's center, if/when you don't need these you can use 'Delete Guides' to clear them...
In your illustrated example it'd need one type-in for the radius and eight clicks [at two per corner] to do [+ menu...delete guides] that's hardly hard work...

[Builder Boy]

@tig said:

To what exactly
If you already have the 3D set of edges I suspect that you simply want to fillet the corners
There are several 'fillet' plugins available already...
My '2D Tools' contains a '2D Fillet' tool, BUT it is one of the tools in the set that actually works in 3D too...
So to use that you'd simply activate the tool, enter the desired radius for the fillet [in the VCB] and pick the two edges forming the corner, repeat for each corner. There is no need to change the radius between fillets unless you want to do so... When you're done you'll have a guide-point at each arc's center, if/when you don't need these you can use 'Delete Guides' to clear them...
In your illustrated example it'd need one type-in for the radius and eight clicks [at two per corner] to do [+ menu...delete guides] that's hardly hard work...

Nice, but I would like to pre-select the geometry I want to fillet

[jeff hammond]

if you want to pre-select a bunch of corners then enter a single fillet radius for all of them then go with the fillet tool found here: (the one called 2DFillet)

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(www.ohyeahcad.com)

if you want to do that and so much more (such as edit the fillet after the fact.. not to mention all the other possible conversions) then definitely pick up Fredo's latest update of BezierSpline (v 1.4):
http://forums.sketchucation.com/viewtopic.php?t=13563

here's a quick video showing first the ohyeahcad plugin then Fredo's..

[flash=660,405:ooqspbvp]http://www.youtube.com/v/4KP-f2qVBoA?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6&border=1[/flash:ooqspbvp]

[Builder Boy]

Thank you, Jeff Hammond! It's just what I was looking for!