just an idea, but can't you use the curve parameters to decide which part to trim. when i trim a curve in rhino with parameters ranging from "0 to x" the result is either "0 to y" or "y to x"... but this would only work for curves as surfaces keep the untrim information.
quirin On Mar 6, 12:48 pm, KCCaine <[email protected]> wrote: > Without knowing exactly what jojo had in mind I can add the following, > which might help him/her get a clearer understanding (I know it would > help me!): > > When you capture a trimmed surface into grasshopper is does come in as > described by Rhino. If you generate a grid of UV points on this > surface these populate over the trimmed surface. However, if you try > to extract an isoparametric subset of the same surface this operation > works on an untrimmed surface. This is also true of the surface box > command. This seems much the same as if you were to rebuild the > surface in Rhino, but the Rhino rebuild function allows you to > maintain the surface as trimmed. Is it possible to have a retrim (true/ > false) option on these types of operations? > > Thx > > KwaiChang > > On Mar 6, 10:46 am, David Rutten <[email protected]> wrote: > > > Ok, the answer is no. > > > Trimming is always tricky in 2D because it's not obvious which parts > > are meant to be kept. > > I'll add a Split component to multiple breps and breps+curves, but I'm > > not sure how a Trim component would work. > > > If you have any ideas, I'd love to hear them. > > > -- > > David Rutten > > [email protected] > > Robert McNeel & Associates > > > On Mar 5, 11:26 pm, CMRHM <[email protected]> wrote: > > > > Sorry for not asking clearly. I mean trimming two interconnected > > > surfaces. There is no custom curves involved. > > > > But may be you provided the answer already, I will try remaping and > > > projecting tonight. > > > > On Mar 5, 4:19 pm, David Rutten <[email protected]> wrote: > > > > > You can copy trims fro another surface, either by remapping the curves > > > > onto the new UV domain or by projecting the curves, but I haven't > > > > added a component yet that will allow you to trim with custom curves. > > > > > Using the Solid components is the closest you can get at the moment. > > > > > -- > > > > David Rutten > > > > [email protected] > > > > Robert McNeel & Associates > > > > > On Mar 5, 10:55 pm, CMRHM <[email protected]> wrote: > > > > > > Hi, David: > > > > > > Is there a component in GH for trimming a surface? I can't find it. It > > > > > looks SubSrf is close, but it is not. > > > > > > Thanks. > > > > > > On Mar 5, 2:11 pm, David Rutten <[email protected]> wrote: > > > > > > > Hi Jojo, > > > > > > > 1) I don't follow. If you reference a trimmed surface in Grasshopper > > > > > > it gets importer as a trimmed surface. The geometry is not altered > > > > > > in > > > > > > the slightest. This is probably one of those: "I know that you > > > > > > believe > > > > > > you understand what you think I said, but I'm not sure you realize > > > > > > that what you heard is not what I meant." moments... > > > > > > > 2) Sorry, can't do. The geometry that Grasshopper generates is drawn > > > > > > on top of the Rhino model. I.e. Rhino has no idea it all exists and > > > > > > thus is unable to include it in selection logic. Someday we might be > > > > > > able to get around this, but it will almost certainly involve a > > > > > > special working mode/command. > > > > > > > 3) I'm working on Undo/Redo. The project got shelved a while ago as > > > > > > I > > > > > > was trying to get these damn data-trees up and running. > > > > > > > -- > > > > > > David Rutten > > > > > > [email protected] > > > > > > Robert McNeel & Associates > > > > > > > On Mar 5, 5:20 pm, jojowasmydog <[email protected]> wrote: > > > > > > > > Firstly, I have use grasshoppers for two school projects and I > > > > > > > totally > > > > > > > in love with the program! Thanks for the great work! If it could > > > > > > > be > > > > > > > better, I would suggest this possible options. > > > > > > > > 1) Recognization of Trim surface: when surface is trim in rhino, > > > > > > > grasshopper does not recognice and reconstruct the uv curve > > > > > > > according > > > > > > > to the new geometry of the surface, it would be good if there is a > > > > > > > buttom to make grasshopper recognice the end of the trim edge. > > > > > > > > 2) selecting in rhino and feekback to grashopper: quite often, > > > > > > > when a > > > > > > > project gets bigger, I really wish I can select from rhino and > > > > > > > know > > > > > > > which line is drawn in grasshopper. > > > > > > > > 3) Record history inside grasshopper: this is a bit like the undo > > > > > > > function but a bit more complicated in a sense. I try Generative > > > > > > > component and they have this already. Would be great if > > > > > > > grasshopper > > > > > > > can undo. And also have a record history.- Hide quoted text - > > > - Show quoted text -
