Hi Visose, you just amaze me! People come up with one impossible question after another and you find an answer. I did see the marching cube example, but haven't tried all possibilities with your math surface definition yet..
You're correct that I did two surfaces. Because the surface intersects with itself it was impossible to get the surface normal otherwise. But I understand you've done it in a completely different way. Please hold on with the definition, it'll take me a couple of days trying to understand what you did and try to duplicate it. Thanks for your effort! /Lars On Dec 8, 1:33 pm, visose <[EMAIL PROTECTED]> wrote: > Hi klint, > No need to leave grasshopper for this. I did it by first creating an > unrolled version of the surface using a rectangle, circles and the > planar surface component. Then I copied the trim information from this > surface to the double mobius strip. If you want the definition i can > upload it:http://grasshopper3d.googlegroups.com/web/doublemobiusholes.jpg > Your double mobius appears to be made from two surfaces, you can use > only one. > > Btw, in another thread (with the title "delaunay/voronoi meshes") i > posted a definition that uses the marching cubes algorithm. This will > create any of the isosurfaces you asked for found in the k3dsurf > program by just copy/pasting the formulas. It's slow but it works. > > Here's an example of isosurfaces using this definition (with low > resolution)http://grasshopper3d.googlegroups.com/web/marchingcubes.jpg > > On Dec 8, 11:50 am, klint <[EMAIL PROTECTED]> wrote: > > > Guess it's not possible to cut holes in surfaces. > > > My aim was to replicate this double moebius figure from Rinus Roelofs > > -http://www.rinusroelofs.nl/rhinoceros/rhinoceros-m06.html > > > Did the surface and the circles in GH, and cut the holes in Moi3D > > -http://grasshopper3d.googlegroups.com/web/doublemoebius.gif?hl=en&gsc... > > > /Lars > > > On Dec 5, 1:09 pm, klint <[EMAIL PROTECTED]> wrote: > > > > Thank you for your replies. But I think I have to rephrase my > > > question. In the first post I tried to cut a hole through a surface, > > > that didn't work as expected. But by capping cylinders and tubes, > > > creating solids, the Solid Difference worked perfectly. > > > But if you start with an irregular surface, is it still possible to > > > cut holes in it? Understood from another post that the Rhino command > > > CreateSolid isn't implemented in GH yet. So if you start with an > > > irregular surface there's no way to make it a solid. > > > > On 5 Dec, 03:18, postal256 <[EMAIL PROTECTED]> wrote: > > > > > try to cap the cylinders, then use Solid Difference, then 'BRep > > > > Components', "List Item", and use a slider (integers) to single out > > > > the center column (it will probably be number 0 on the list, so you > > > > could probably skip the slider and just enter 0). > > > > > Eric
