3D PATTERN ON SURFACE

Replies to This Discussion

Permalink Reply by Joseph Oster on November 10, 2017 at 6:48am

I see a surface (layer 'Livello 09'), a grid of points (layer 'point grid') on the surface, and two layers that appear to have the same set of diagonal lines in diamond patterns between the points: 'Predefinito' and 'GRASSHOPPER'.  But I don't know what you want to do?

Permalink Reply by chiar molino on November 10, 2017 at 6:55am

yes I forgot to delete useless levels. I have to morph and distribute a geometry on that surface. The lines you see are the directions in which I want to deforme the geometry. It mean that the pattern have to follow tha surface's curvature. Is it possible ? I want to create ellipses with this blu directions. because I need this geometry to follow those lines. pleeeease help me ='(

Permalink Reply by Joseph Oster on November 10, 2017 at 7:22am

You didn't include the geometry you want to distribute?  And this screen shot is generated from GH code you haven't posted.  Trying to help but you'll have to make it clearer.

Maybe study this?

http://www.grasshopper3d.com/forum/topics/map-a-geometry-on-a-surfa...

Permalink Reply by chiar molino on November 10, 2017 at 7:45am

ok you're right.  It's somenthing like the last pic of the link you sent me. the one with circles. but my geometry (that Is an ellipse) have to follow the curves you see in the file. the line you see in my gh code are the base of my pattern. Im giving you the code. thank u so much

Attachments:

• shape.gh, 7 KB

Permalink Reply by Joseph Oster on November 10, 2017 at 8:11am

I don't have Lunchbox "Triangle Panels C" so can't help you, sorry.  I still don't see any shape?  Your description isn't clear enough for me.

Permalink Reply by chiar molino on November 10, 2017 at 8:27am

yes I know because it's hard for me to explain here what I need, thank u anyway 

Permalink Reply by chiar molino on November 10, 2017 at 9:35am

last question , can I deforme and morh a geometry following not just isocurves but also other curves?

Permalink Reply by chiar molino on November 10, 2017 at 9:57am

can I tell grasshopper that I want my blue geometry following the red line's direction?

Permalink Reply by Joseph Oster on November 10, 2017 at 11:32am

Here are a couple of ideas to play with.

Instead of using Lunchbox's "Triangle Panels C" (not that there's anything wrong with it, I just don't have it), I used Paneling Tools 'ptSrfDomNum' and 'ptToDiamond'.  I reduced the div count from 48 to 12 just because too many divisions take too long!  That number can be increased, of course, when you're happy with results at a lower resolution.  These diagonals aren't quite the same as yours... in between them. 

I used 'CrvSrf' to get the diagonal lines in both directions, then used those lines to 'SrfSplit'.  Since this results in trimmed surfaces, I re-created each sub-surface using 'EdgeSrf'; I don't know how closely these match the original surface?  I used 'Prune' to ignore sub-surfaces without four edges.

Then I tried 'Map To Surface (Map Srf)' in the cyan group to map an ellipse (or two...) to each sub-surface using a scaled reference surface ('BBox').

And 'Box Morph (Morph)' in the yellow group to morph an extruded, capped (solid) ellipse to each sub-surface.

Attachments:

• morph_2017Nov9a.gh, 37 KB

Permalink Reply by chiar molino on November 10, 2017 at 11:42am

thank you so much, it's not what I m looking for, but it's helping me =)

Permalink Reply by Joseph Oster on November 10, 2017 at 11:55am

I'm exploring this myself and this is a direction that makes sense to me.  A lot depends on what curves/geometry you supply and how the various parameters are set.

Just FYI, when I bump the div count up from 12 to 48, 'SrfSplit' takes 4.1 minutes and 'Box Morph' takes ~26 seconds.

Permalink Reply by chiar molino on November 10, 2017 at 11:58am

yes you re right. My problem is that the directions that I have to follow are not casual but they are related to the curvature of the surface. =)