Interpolated curve with and without tangents

Hello,
I'm new to Grasshopper, so I think this problem may be easy to solve:

I'm trying to create an interpolated curve within grasshopper via the BzSpan module.
The curve should have a start and end tangent and go through an additional point without tangents.
I'm able to create the desired curve (resulting in a polysurface) within Rhino (rh1.png) with the InterpCrv command, but not within Grasshopper (gh1/2.png).
As I see this, the IntCrv module in GH doesn't allow me to set tangents.

You'd make my day, if you could help me.
Thanks,
Julius

Attachments:

gh1.png, 34 KB
gh2.png, 41 KB
rh1.png, 44 KB

Replies to This Discussion

Permalink Reply by David Rutten on July 30, 2011 at 7:40am

You could write a fairly small VB/C# script for this, but I just added the component. I plan to release later today (barring any horrendous bugs that float to the surface until then).

Both tangents can be zero-length vectors (in which case they are ignored) and periodicity is no longer an option.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Julius on July 30, 2011 at 9:25am

Thanks, David. This is exactly what I needed.

Will you post here, once the update has been released?

Permalink Reply by David Rutten on July 30, 2011 at 9:42am

No, there will be a new features topic on the main forum. You'll also get an update message when you run Grasshopper and there's a newer version available.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Julius on July 30, 2011 at 3:12pm

It seems like there's a bug.

Starting with some simple points and feeding the component with them works. But I have a configuration, where the C output contains 9 curves instead of 3.

Maybe it has to do with some Explode components I use before, which generate vectors later on.

Hopefully I find a way to reproduce the problem.

Attachments:

gh3.png, 66 KB

Permalink Reply by David Rutten on July 30, 2011 at 4:46pm

It's most likely a mismatch in your input data structure. You'll need to have a close look at how the data is structured before it goes into the component. Either post your file or hook up a bunch of Param Viewers and post another screen shot.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Julius on July 30, 2011 at 4:56pm

Added the screenshot.

I think they should behave normally.

Attachments: