how to change the domain of the inner-pt of the curve?

hi,

with this definition it is possible to change the domain
from the first and last point of the curve to create a subcurve.
the question is: how to change the domain of curve-inner-pts?
for example, i decided to divide the curve in 3 segments,
and wish that the outer segments are to be smaller.

any idea?

thanks in advance

Replies to This Discussion

Permalink Reply by David Rutten on October 4, 2012 at 6:46am

Hi RWNB,

you can change the domain of an entire curve without changing it's shape, but it is not typically possible to reparameterize an arbitrary portion of the curve without changing the shape. If you want to divide based on length, then you should not be using domains to begin with. You can place points on the curve using [Evaluate Length] and then [Shatter] the curve to divide it at the custom parameters.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by RWNB on October 4, 2012 at 7:02am

thanks david.

I must once again come in the grasshopper world. if i ever was in it?

Permalink Reply by Dedackelzucht on October 4, 2012 at 6:53am

Best Regards

DeDackel

Permalink Reply by RWNB on October 4, 2012 at 7:02am

geht das auch noch etwas komplizierter? (:

Permalink Reply by Dedackelzucht on October 4, 2012 at 7:05am

it is not cpmplicated :-)

get the t parameter for each point on the curve

create domains with consec

create 3 subcurve

manipulate the starting domain of the first curve

manipulate the ending domain of the last curve

thats it :-)

Permalink Reply by RWNB on October 4, 2012 at 7:39am

hmmmeeee, (:

i tried to apply your definition to a straight curve.
because of the clarity. (:
it does not work quite right.
can you show me, how can i achieve the result,
what i have shown in the graphic.

thanks

Attachments:

CullCrv.gh, 7 KB

Permalink Reply by Mark on October 4, 2012 at 7:42am

Maybe this is what he means?

Variation of DeDackel solution. This changes the domain of the middle subcurve.

Permalink Reply by RWNB on October 4, 2012 at 8:02am

can you show also the resulted curves in rhino?

Permalink Reply by Mark on October 4, 2012 at 8:14am

Sorry, I had to make some changes. It was not right. It needs more fine tuning for complete control.

Permalink Reply by RWNB on October 5, 2012 at 4:02am

yes, you're right.! )-/

Permalink Reply by Mark on October 5, 2012 at 7:36am

This is what I use for some of my projects. You can choose the Start and End length of a curve and the middle is the subcurve. It's limited, for is about a specific task, but you may be able to modify to fit your needs.