As you asked by email, i uploaded the definition. I changed a couple of things, it's not exactly like in the previous screenshot but it does the same thing: http://grasshopper3d.googlegroups.com/web/doublemobius.ghx
On Dec 8, 2:29 pm, klint <[email protected]> wrote: > 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
