Help with Surface Mapping on a Sphere

Replies to This Discussion

Permalink Reply by peter fotiadis on April 11, 2017 at 10:20am

Tom

I guess(????) that he's attempting to "sculpt" the sphere against the biggest(?) BrepFace (+ holes) - or some user identified BrepFace anyway or a thickened BrepFace Loop.

A task rather impossible given the very problematic collection of curves used (duplicates, overlaps, etc etc). That said in certain "similar" cases Rhino Methods fail without warning.   

Attachments:

• Sphere_Map.gh, 33 KB

Permalink Reply by Clifford Bourque on April 11, 2017 at 11:35am

For the image I used to generate those lines, I brought it into Illustrator and made line work out of it then exported it as a DWG for Rhino...Would it be better to process the image with Grasshopper?

Im kinda stuck with that image of that river..

Permalink Reply by Clifford Bourque on April 19, 2017 at 9:51am

I found importing AI into Rhino is as simple as that, no need to export from AI as DWG, messes it all up! I took some time cleaning up all the lines and created a much cleaner extrusion (its embedded) but not having any luck mapping it to the sphere.

Thanks for any pointers,

Cliff

Permalink Reply by Clifford Bourque on April 19, 2017 at 11:46am

Peter,

Your script worked really well, thank you, indeed my curves were a mess. I cleaned them up and it works quite well!

The final Solid Difference though gives me a jagged line around all the edges..how can I solve this?

Also, how can I tell how deep its cutting into the sphere? I need it to be .25 inches deep.

(P.S. its not so much a big deal, but it doesn't use all the smaller curves to cut into the sphere, just the largest one, is it possible to include those smaller ones?) I haven't tried running it twice and leaving out the big curve, maybe then it'll do it...

Thanks for any pointers and your time,

Cliff

Attachments:

• Sphere Object 2.0.3dm, 530 KB
• Sphere Object 2.0.gh, 17 KB

Permalink Reply by peter fotiadis on April 20, 2017 at 1:38am

Well ... I have bad, bad and bad news:

1. Rhino is NOT CATIA (i.e. if "solid" ops are on demand > long is the path and hilly).

2. I never work with Rhino thus I don't know what is solid's BrepFace count limit.

3. Your "big" curve is very taxing (see 2).

4. Your "big" curve creates artifacts in all my Kepler Quadros (K4200 and up > see 2).

After inspecting what to take ... toggle the doTheMoprh thingy (good luck).

Moral: may the Force (the dark option) be with you.

Attachments:

• Sphere_Map_V2.3dm, 452 KB
• Sphere_Map_V2.gh, 134 KB

Permalink Reply by peter fotiadis on April 20, 2017 at 3:04am

And this ... makes some(?) sense(?) more.

See the added 4th mode, the deltaZ for the mapping Box ... and maybe most importantly the thing at the end that reports the depth.

Note: If I liked meshes I could be tempted to speed up things by using meshes ... but fact is that I hate meshes.

Attachments:

• Sphere_Map_V2A.gh, 140 KB

Permalink Reply by peter fotiadis on April 21, 2017 at 12:44am

And this V2B is a bit more elaborated (added a 5th selection mode plus some other things). Switching entirely to code (V3) is available as well.

Attachments:

• Sphere_Map_V2B.gh, 145 KB

Permalink Reply by Clifford Bourque on April 24, 2017 at 11:21am

Peter,

Thanks so much! You really saved me. Great script, I see it being useful for many other projects.

Here's a pic of what your script helped to accomplish, just finished printing it today.

Thanks again!

Cliff