Rebuild part of curve

Rhino Rhino for Windows
1

Hi,

It’s possible to rebuild part of a curve?

In illustrator we can change the continuity of the curve, i don’t know if it is possible to do it on Rhino.

Thanks

2

you can “split” the curve at “points” wich you can “rebuild” and rejoin with the other line segments.
if I misinterpreted your question, this should be the right answer:
type the command “pointson” to see control points of a curve. you can disable pointson simply by esc.
click the points and move them to customize the line. you can move easily with the “gumball” activated.

3

Hi Bruno - what is it you need to accomplish? Can you post an example?

-Pascal

4

Hi, thanks by your answer.
CURVE_REBUILD.3dm (27.2 KB)

Please open this file to see what i want.

5

Hi Bruno - try InsertKink at the location of your middle red point, and then turn on the points and move the curve point there.

-Pascal

6

Hi pascal, thanks for the tip but it’s not what I’m looking for.
My problem it’s that the curve has a break point as you see in the example in the bottom.
I can rebuild the curve with a lot of points, but i don’t want to do that because i will change other parts of the curve.

I just want to add or solve that break point, in illustrator there is a command where we can convert anchor points to smooth.

That’s what i’m looking for, see the example image.

7

Hi Bruno - did you actually try InsertKink to add your ‘break point’?

-Pascal

8

Yes, but InsertKink creates a break point in the first and last point in the reconstruction of the curve.

9

To remove the kink, if that is what you are asking for, what I would do is InsertKnot on either side of the existing kink, then RemoveKnot once at the kink. Ideally, the knot insertion should use MidPoints=Yes and snap to the marked midpoints on either side of that knot location.

@TAZ Bruno - probably a better way is to remove curve-degree number of knots at that kink location. Find the degree - the What command will help, and then in RemoveKnot, click on that location degree number of times.

-Pascal

10

That’s it. Thanks very much pascal.

11

@TAZ Bruno - actually, instead of removing all the knots (degree number) try removing degree-1 knots, leaving a simple knot there, not no knots at all - that should modify the shape less than if you remove all of the knots. BTW, One of the developers here cooked up some code that allows me to make a simple ‘RemoveKink’ tool in Python, in version 6/WIP.

-Pascal

12

Thanks, i will try