extrude curve along a curve

Hello,

I'm trying to extrude a curve along a cosine curve. that was not a problem with grasshopper nevertheless I don't find the tool which give me the possibility to keep the curve always perpendicular to the rail...

I hope that someone knows a way to do that.

thx

Replies to This Discussion

Permalink Reply by TomTOM on April 11, 2012 at 1:26am

some documents in order to highlight the issue

Attachments:

sinus wave on a circle.ghx, 89 KB
ScreenShot055.bmp, 1.7 MB

Permalink Reply by Danny Boyes on April 11, 2012 at 2:55am

Here's a method using the Orient component to place your 'base' section curve along your rail curve on Horizontal Frames which are aligned to the Tangent of the Curve.

Permalink Reply by Dedackelzucht on April 11, 2012 at 2:58am

Ah ok! I thought it was a 2d problem.

anyway the file.

Best Regards

DeDackel

Attachments:

sinuswaveonacircle_DeDackel.gh, 7 KB

Permalink Reply by TomTOM on April 11, 2012 at 3:05am

Dedackelzucht, I don't know why but I cannot open your GH file...

Permalink Reply by Danny Boyes on April 11, 2012 at 3:26am

I added my own section curve, but it would still work for 2D.

Permalink Reply by TomTOM on April 11, 2012 at 3:04am

could you please send me your file?

Permalink Reply by Danny Boyes on April 11, 2012 at 3:24am

You are using an older version of GH that's why I posted the screen shot. In bottom Right Hand corner of the Grasshopper Window you will see the version number. There was big change to the code at version 0.8.0050 which rendered all previous version unable to open latter ones.

Permalink Reply by TomTOM on April 11, 2012 at 3:39am

Ok i will download the new version.

otherwise I've found a way to devise my surface, I apply translate many curves at different locations and I loft them. the drawback is I have to build multiple 'base' curves to reach the curve rail

Permalink Reply by Danny Boyes on April 11, 2012 at 3:49am

I apply translate many curves at different locations and I loft them

You don't have to loft them. You can just put these curves into the Sweep1 Component as Section Curves. Have a look at my image above again. I only added two components to your definition Horizontal Frames and Orient. Horizontal Frames creates the location to translate the base curve to and Orient does the translation. Sweep1 is still using your rail curve

Permalink Reply by TomTOM on April 11, 2012 at 4:04am

why do you think sweep is better? find attached an update of my file.

Attachments:

sinus wave on a circle.ghx, 68 KB

Permalink Reply by Danny Boyes on April 11, 2012 at 4:30am

It doesn't make any difference to me, but because you keep referring to a rail curve, I thought you would like it to follow your rail curve and Loft will only approximate the curve unless you have a huge amount of sections.

Permalink Reply by TomTOM on April 11, 2012 at 9:15am

I updated my GH, could you please send me your previous GH file?

because I think your idea has a better robustness regarding the curve rail. indeed, with my model I can easily loft for a circle but if I have a freeform(not a circle) that doesn't work with my model.