What would be the best approach to create the skin for this shape?: http://grasshopper3d.googlegroups.com/web/schwartz2.jpg Discussed in this thread: http://groups.google.com/group/grasshopper3d/browse_thread/thread/fde34cc34beb0921?hl=en# This skin in the screenshot is done by creating panels over several point grids (and culling the unwanted panels). You can't create this object by a continuous surface (i think). The problem is that with this method some panels overlap. The superposed point grids create an unordered point cloud that could be triangulated.
I was thinking that maybe if the delaunay triangulation had a distance threshold, and the points where close enough on the imaginary surface, it would only triangulate on the right spots and wouldn't create triangulations all over the place (well, maybe on edges but the curvature is continuous in this example). In this case, i don't think there's a useful guide geometry. On Dec 2, 2:47 pm, David Rutten <[EMAIL PROTECTED]> wrote: > Delaunay is pretty easy, but it's a 2D algorithm so there's always > some extra stuff that needs doing when using it in a 3D environment. > This is why the PoistSetReconstruction plugin uses Guide geometry, to > convert a 3D point cloud into a 2.5D point cloud. > > Once Delaunay is finished, it's quite easy to bolt a 2D voronoi cell > solver on top. 3D voronoi is much harder to do efficiently. It's not > as easy to discard certain points, which means you end up doing a lot > of unnecessary solid boolean operations slowing the whole thing > down... > > -- > David Rutten > Robert McNeel & Associates > > On Dec 2, 2:29 pm, visose <[EMAIL PROTECTED]> wrote: > > > Very nice. I also used voronoi a couple years ago as one of the > > parameters of urban planning for a school project. The realtime > > manipulation of grasshopper would've come really handy. Is the > > delaunay algorithm much harder to implement? I'd like to use it to > > mesh some unordered point clouds. > > > On Dec 2, 8:29 am, Dimitrie <[EMAIL PROTECTED]> wrote: > > > > hello oompa, > > > as i was also needing some sort of space-partitioning algorithm for an > > > urbanism project tomorrow, i tried and managed to pull up a > > > grasshopper voronoi node, based on david's algorithm > > > you can check it out > > > herehttp://dimitrie.wordpress.com/2008/12/01/grasshopper-voronoi-diagram/ > > > > On Nov 25, 7:44 pm, oompa_l <[EMAIL PROTECTED]> wrote: > > > > > is this possible with grasshopper yet? maybe it always has been...if > > > > anyone has any clues on this, I could use it right now... > > > > > thanks!
