Change End Bulge of a Curve!

Hello All,
thanks in advance for the answers!
I have a dream: to understand how to move the CVs of a curve so that it maintains the curvature (G1 + G2 like the "End Bulge" command.. but with Grasshopper).
With the command "End Bulge" I noticed that G2 moves perpendicular to G1!
But with an increase which is not equal... and is different, every time, depending on the angle between G0 and G1 and G2.
How do I predict the position of G2 compared to G1 simulating the "End Bulge" command?

Thank you for your professional answers.

^___^

Below you can see an example with a curve crimson ... If I move G1 of 1 unit G2 moves of 0.42 units (perpendicular) .. If I move of 2 units the next step is 0.46 unit... 3 units --> step 0,50 units... etc.

And each time changes depending on the initial conditions (G0/G1/G2 angle).

Replies to This Discussion

Permalink Reply by Lucius Santo on September 21, 2012 at 2:54pm

Please ^_^

No one can help me?

Maybe I scared you with an image a little bit complex, sorry (and sorry for my english)!

m-____-m

Maybe this image is less chaotic...

Permalink Reply by David Rutten on September 21, 2012 at 3:52pm

The algorithm for EndBulge is rather complex and very deep down. I've asked the math guys in Seattle whether it makes sense to expose it in the SDK and if so, in what way. I'm afraid there's no quick solution to this.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Lucius Santo on September 21, 2012 at 5:22pm

Dho! +__+

Thanks anyway. You've been very kind!