realign UV subdivisions?

Hi all,

When I use SDivide to subdivide a Brep, the subdivisions are based on the surface rather than floor levels. If I use contour for example, I can subdivide the surface based on a specified floor-to-floor height. Example file is attached.

Is there a way to get the UV values on a surface from points on the contour lines? Or is there a way to realign the SDivide so that it divides the surface at specific points (for example, where the surface intersects a floor rather than an even subdivision). I would like to do some Curve On Surface stuff from the UV values

Any help would be great!!

Attachments:

crvOnSrf.3dm, 652 KB
crvOnSrf.gh, 4 KB
crvOnSrf.jpg, 4.9 MB

Replies to This Discussion

Permalink Reply by Mateusz Zwierzycki on May 9, 2012 at 5:22pm

use the "surface closest point" component, beside closest point as 3d point, it outputs uv values.

Permalink Reply by jfchn on May 9, 2012 at 6:40pm

Awesome! thanks a lot

I have one more question now, perhaps the surface was not made correctly in Rhino, but I can't figure out how to model it correctly...

when I look at the UV points they are ordered in an odd manner, see attached.

this causes problems when i want to break the grid of points into cells, each cell having 4 pts (ie: point A, point B, point C, point D). because the points are ordered oddly, I get criss crossing when I draw the lines, see below:

any ideas?

Permalink Reply by jfchn on May 9, 2012 at 6:49pm

here are the files

Attachments:

uv.3dm, 787 KB
crvOnSrf.gh, 8 KB

Permalink Reply by Mateusz Zwierzycki on May 11, 2012 at 8:22pm

easiest way :

sort points by Z values first (each level = data tree branch)
then do a little trick :

make bounding box of your building
create a circle based on box centroid
for each point find a closest point on circle
sort points from each level(=branch) with "sort" component - as K input values from closest point on circle (parameter on curve)
you can rotate your circle in Z axis to adjust which one point should be first/last

how to sort points by z value and place them in branches according to level ?

here is def in which I do it, copy needed components :

http://www.grasshopper3d.com/forum/topics/collecting-outside-points...

(components : pcomp -> cset -> vb (in which input your points as D))

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