That video is really cool. I don't think grasshopper is the ideal platform to achieve something like that. To make it roll over a flat surface would be easy, but to make it roll over a terrain you'll need some sort of collision detection..... I'm thinking having a linked move and rotation component (so it rotates while it moves), then it projects the closest point of the object to the terrain and gets its normal, and this normal is linked to the vector in the move component so it's always perpendicular to the terrain normal.... To make something half decent you'll probably need some scripting components. Of course to make it look real you'll need some sort of physics engine. To deform it as it rolls, I can't think of a way to get even close to what the video produces, but something really simple i guess would be to place a scale component that squishes the vertices (only vertices, not the whole geometry so the tubes are not squished, only shortened) in the z axis or perpendicular to the surface. Nevertheless, I'm sure there are more qualified people here that could help you. I'd be interested too to see what kind of complex motion can be achieve in grasshopper.
The dodecahedron definition: http://grasshopper3d.googlegroups.com/web/dodecahedron.ghx I added a couple of components that remove duplicated lines. On Nov 15, 11:58 pm, Danny Dong <[EMAIL PROTECTED]> wrote: > Amazing stuff! > > Both from Topmod3d and the models Visose made. > > Do you have the GHX file for those shapes? I would really like to see > how you made them... > > hmm, for the manipulating individual points part, maybe I can explain: > I want to to create a structure that will be able to deform, be able > to walk perhaps. > > If I start out with a standard shape like a dodecahedron that has > mathematically based patterns could i deform them based on a series > limiting parameters like topography so that the shape would deform as > it "rolled" over it or as wind blew on it from one side? > > I do want to create an animation eventually, to see how a structure > reacts.... Could I say increase the triangulation on the west side > only when needed and return it back to the original after its not > needed. > > Sorry if this is unclear, But I have an idea in my head and am not > sure which program(s) to execute them in. > maybe this youtube video will help > clarifyhttp://www.youtube.com/watch?v=txZMLS7YD6Q > > On Nov 15, 2:54 pm, visose <[EMAIL PROTECTED]> wrote: > > > and here's a dodecahedron using almost same method but getting the > > vertices using pointXYZ components instead of > > rectangles:http://grasshopper3d.googlegroups.com/web/dodecahedron.jpg > > > On Nov 15, 8:20 pm, visose <[EMAIL PROTECTED]> wrote: > > > > I don't know much about this stuff, but i did an icosahedron using the > > > "cartesian coordinates" i found in its wikipedia page. I doubt this is > > > a good method for doing different types of Archimedean > > > solids:http://grasshopper3d.googlegroups.com/web/icosahedron.jpg > > > Btw, why do you want to manipulate individual points in grasshopper? > > > Once you start manipulating indivual points, the relationships that > > > build the structure are lost, so you might as well bake it and do it > > > in rhino. > > > > On Nov 15, 2:01 am, Danny Dong <[EMAIL PROTECTED]> wrote: > > > > > HI, > > > > > I've used grasshopper somewhat successfully for mediocre tasks, > > > > creating stair, escalators, etc, etc... but nothing super complex. > > > > > By what I mean complex is something that the designer (me) doesnt > > > > already know the outcome of. I think a powerful aspect of GH is that > > > > you can create the code to achieve things you would be able to > > > > conceive of without the aid of parametrization. That being said here > > > > is my issue: > > > > > I am trying to get into more mathematical based GH codes. I am trying > > > > to achieve a fullerene-like (http://www.physics.uc.edu/~pkent/graphics/ > > > > c60_big.jpg) > > > > structure and be able to morph it, add points to it, manipulate the > > > > entire structure and individual points as well. The end result would > > > > probably be an animation. > > > > > Now before I started, I was wondering if there were any general tips > > > > on how to get started because I have no the slightest clue. > > > > > thanks for any help or references > > > > > D
