Grasshopper

algorithmic modeling for Rhino

principle's abstraction of streamline-placement algorithm from http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Stream_lines_2/Chapter_main.html to 3D.

underlying field was an analysis result of karamba - principle stress field

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Comment by Robert Vier on May 6, 2013 at 9:17am

no i did not, although there is a wrapper for qhull around. from the beautiful times when grasshopper did not have 3D voronoi as a native feature ;) if i knew how to attach files here, i would have posted it anyway..

however, it works in a 'typically numeric' way by taking every mesh vertice as a possible starting point for a field line, and per iteration take the one point that is farthest from any existing geometry.. did it with hoopsnake for testing...

best

R

Comment by Manuel Sotomayor Millan on May 6, 2013 at 6:50am

Thanks 

That is exactly where i am stuck. I wanted to get the 3d delaunay algorithm, but most of the libraries i find are on C++ and have now idea on how to build a wrapper. Did you write your own 3d delaunay algorithm??

Comment by Robert Vier on May 6, 2013 at 4:39am

no cgal libraries involved, just the idea! but since their concept works with delaunay triangulation only in 2D, i abstracted it to 3D and arbitrary meshes as a basis to work on via nearest neighbor search .. also this is no component (except one minor c#) yet, but a definition to test the principle first .

best

R

Comment by Manuel Sotomayor Millan on May 5, 2013 at 7:34pm

Hi Robert.

Nice Work. How did you implement the CGAL libraries?? To what language??? 

Did you use swig for that?? I tried to call them from Python, (I think Clemens is friend of yours) he said me to use SWIG for that, but i don have a clue on how to do it.

Any hint???

Thanks in advance.

Nice work by the way.

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