Projecting Curves on Loft

Forgive the newbie question. I have been researching for a while and can't seem to get to what i need. I have a lofted surface (see attached) with a vertical orientation in the Z axis. I have generated a voronoi pattern using a grasshopper component. I've also baked this pattern to a collection of polylines. What i'd like to do is project this collection of curves unto the lofted surface. As a subset question, i also want to trim the surface using the voronoi pattern to create "windows" on my wall. How can i achieve this?

I am aware of the project curve unto brep component but can't seem to make it work.

thanks!

Attachments:

Projecting Curves on Loft.JPG, 174 KB

Replies to This Discussion

Permalink Reply by Matt Gaydon on February 19, 2014 at 4:51pm

Hi Omar

I think the component your looking for is 'Map to Surface' Component to map your flat crvs onto your lofted surfaces.Then to create your openings try using 'Item' Compment to select the crvs on the surface you want to cut with then use look at 'Split Srf' Component to split you Lofted surface then use a Look at 'Cull index' Component to remove the surface you want to delete from the list of surfaces output from the Split Surface Component.

Hope this helps

Matt

Permalink Reply by Omar Calderon on February 19, 2014 at 5:16pm

Thanks Matt ! The map to surface asks for a T (target coordinate space) any thoughts on how I extract that from the surface? (If that is what is asking?)

Thanks again!

Permalink Reply by Matt Gaydon on February 19, 2014 at 5:45pm

If I remember right, T Input is the surface you want to map the curves onto. No need to extract data from the surface just plug it in.

Permalink Reply by Omar Calderon on February 19, 2014 at 7:18pm

that work only so far. see attached screen grab. the crvs are now floating a few meters above my voronoi geometry instead of making on the lofted surface. Any insights?

See my def above.

Attachments:

Projecting Curves on Loft.JPG, 118 KB

Permalink Reply by Matt Gaydon on February 19, 2014 at 8:17pm

First think to try is flatten you Curves go into the Map to Surface component is it still fails try to make the base Surface from a Planar surface using the rectangle you used to create the boundary on your Voronoi Curves and plug this into the S input on the Map to Surf. I am guessing the T input is your Lofted Surface already.

No idea why but Planar Srf in GH is called Boundary Srf

Permalink Reply by Omar Calderon on February 19, 2014 at 9:21pm

Matt. The rectangle plug in to the map to surface component did the trick thanks! Don't seem to understand the mechanics of why it works that way but it does! Thanks!

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