Custom radial mesh

Replies to This Discussion

Permalink Reply by RENE on November 21, 2017 at 11:41am

Hey Watertech,

Interesting problem. Tried a few things but ran out of time before achieving what you're after. Left a slightly different approach to the initial mesh construction that might help later on.

Will try to come back to it later today.

Good Luck

Attachments:

• radialmesh_edit.gh, 20 KB

Permalink Reply by watertech on November 21, 2017 at 12:25pm

Thanks for your help! Interesting approach, just watch out that if you offset the circle you get something similar to the RadGrid component. What I would like to achieve is quite different from that and you get much more regular mesh faces.

I attach the latest file I've worked on. I managed to get to two lists containing the two sets of segments that need to be tweened. The problem is that the elements of the two lists have a complete different index order and if I try to tween it gets really messy.

I think that working with a good DataTree could make it much easier but I am not really good at it.

Maybe working with each circular sector in a separate branch can facilitate the correspondance between the two segments to tween

It would be even better if the script would create radial meshes for each cell of the voronoi at the same time, but I guess that is also a matter of DataTree

Attachments:

• radial mesh 2.gh, 12 KB

Permalink Reply by Anders Holden Deleuran on November 22, 2017 at 1:39am

Another approach that could work for you might be to utilise Weaverbird's ability to mesh and subdivide closed polylines directly (example here).

Permalink Reply by watertech on November 22, 2017 at 8:11am

Thanks Anders, I tried to connect some closed curves directly into Wb but I get meshes that have more edges than the ones I provide.

I was able to partially solve what I asked but I still can't transform my U and V lines into a clean mesh. If the edges of the new mesh exceeds the number of lines that I have drawn Kangaroo shows an error.

I attach the latest file. The problem should be easy at this point, it is just about creating a clean mesh with a given trapezoidal buondary but I cant figure it out.

Any help would be appreciated thanks!

Attachments:

• radial mesh 3.gh, 16 KB

Permalink Reply by Anders Holden Deleuran on November 22, 2017 at 8:44am

Afraid I don't quite follow your definition, but here's an alternative method (that takes the input polyline edges length into account). Seems to work quite well:

Edit: You'll probably need to fiddle with logic and/or weld the vertices downstream to ensure there aren't doubles at the seams.

Permalink Reply by Anders Holden Deleuran on November 22, 2017 at 8:52am

Forgot to internalise the polyline. Attached the GH definition.

Attachments:

• 171122_Radial_Polyline_Even_Meshing.gh, 8 KB

Permalink Reply by RENE on November 22, 2017 at 8:58am

Elegant and simpler than what I suggested. Yes watertech you're right the circle approach is a bit brute force plus irrelevant. I focused at the end on making the mesh triangles. Still Anders Holden Deleuran's approach is nicer.

Cheers

Permalink Reply by Filippos Filippidis on November 22, 2017 at 1:09pm

I gave it a go with the logic described above and put it in a loop.  I got stuck in generating a clean mesh but by baking the curves and bringing them back into GH and the Wb component the mesh was good.

Based on voronoi as input and modifiable resolution..

After Anders clean solution this will need some re-working!

Pics below:

Attachments:

• GH_watertech.gh, 114 KB

Permalink Reply by RENE on November 22, 2017 at 6:17pm

Another approach that might get it close visually at least, one with BullAnt another with weaverbird, using ander's solution first