mapping from one mesh to another

Hi all,

I've been trying to map one mesh to another using the MeshCP and MEval components, hoping to use for mapping one "pattern," or "gradient" from one to another, and from 2d to 3d and vice versa.

I noticed that while the process works for 2d to 3d, it somehow doesn't work for 3d to 2d as in the attached gh file with geometries internalized. It seems like the MEval component isn't returning the right outpout points in this case.

Side note..it seems like MEval does not exist in rhinocommon and so can't be used in the C# environment? What would the work around be if this workflow is to be written in code?

Any help would be greatly appreciated!

Best,

Tim

Attachments:

meshmap.gh, 121 KB

Replies to This Discussion

Permalink Reply by Timothy Tai on May 24, 2017 at 1:27pm

Hi all,

a little update:

The same strategy failed using the MeshMap component from Kangaroo.

Please find attached an updated gh file.

Thanks again,

Tim

Attachments:

meshmap.gh, 138 KB

Permalink Reply by Daniel Piker on May 24, 2017 at 2:15pm

Maybe it is because your source mesh is periodic, but the target mesh isn't.

In Rhinocommon the functions I think you are looking for are:

http://developer.rhino3d.com/api/RhinoCommonWin/html/M_Rhino_Geomet...

and

http://developer.rhino3d.com/api/RhinoCommonWin/html/M_Rhino_Geomet...

Permalink Reply by Daniel Piker on May 24, 2017 at 2:20pm

Here's an example of how the meshmap component works. Internally it uses exactly the methods I just linked to above.

Attachments:

meshmap.gh, 25 KB

Permalink Reply by Timothy Tai on May 24, 2017 at 3:01pm

Hi Daniel,

Thanks a lot for the response and the file - that was how I thought it should work as well.

Please find attached an updated file. It work when the uv subdivision is set at 20 with a non periodic mesh; however, it seems like when the subdivision is set to 10, or 30, it doesn't work anymore.

Any idea why?

Thanks!

Attachments:

meshmap_v2.gh, 166 KB

Permalink Reply by Timothy Tai on May 24, 2017 at 3:13pm

another approach/question would be, is there a way to split the periodic mesh along a seam?

so that the start and end edges coincide but are not the same. Thanks again!

Permalink Reply by Timothy Tai on May 25, 2017 at 11:32am

Hi all,

If anyone is interested, I've come up with a work around by moving one of the edge loops out of the original mesh and thus avoid the mesh being welded into a periodic one. This opened up mesh is then map to the flat rectangular one as originally intended.

It requires using the MLoop component provided here:

http://www.grasshopper3d.com/group/milkbox/forum/topics/mesh-pipe-a...

Attachments: