Ah, the "kinky surface" issue. I was wondering where that was popping up.
Thanks for the info on SDK. I find that slightly odd though. Personally, I supply the 4 points in the order that I want them to be, and would prefer it stay that way. When exactly was this change made to grasshopper? Did it always have its own way of doing things, or did it at one time use the SDK function. I ask because I've had this problem in the past (I'm sure you've seen the variable panels video) and have shy'd away from using it just for that reason. Best, Damien On Mar 15, 9:55 am, David Rutten <[email protected]> wrote: > Hi Damien, > > the Rhino SDK function that creates a surface from 4 corners indeed > has 'smarts' build into it that will reorder the points if it feels > that makes for a better surface. > > The Grasshopper component for that reason does not use the SDK > function. Grasshopper instead creates two lines AB and DC and then > creates a ruled surfaces between those two lines. > > I think the problem might be that the extrude component insists on > outputting a single surface for the polyline extrusion, rather than a > polysurfaces with individual faces for each polyline segment. This has > been changed in Grasshoper 0.6, many components that used to output > single surfaces now output breps if the surface contained kinks. > > -- > David Rutten > [email protected] > Robert McNeel & Associates > > On Mar 15, 4:22 am, damien_alomar <[email protected]> wrote: > > > I'm just guessing here, but the Surface 4 Point component is rather > > "unstable" in the sense that corners will get crossed up some times. > > I believe this problem is in the Rhino SDK itself as I've run into > > this with Rhinoscript as well. anyway, if that's the case, then the > > extrusion won't cap bc it would make a non-manifold object. > > > It seams like what you're doing could be done a different way though, > > so do you have to do it exactly that way? Could you generate a plane > > and make the box from that? maybe do a morphed box if you need to... > > > Best, > > Damien > > > On Mar 14, 5:22 pm, David Rutten <[email protected]> wrote: > > > > Hi Alpha, > > > > if a component is red, it means there's at least one error. If it's > > > orange, there is at least one warning and no errors. > > > You can see errors and warnings when you open up the context menu of > > > the component itself. > > > > Sometimes it's not the component but the input parameter that contain > > > the error, in that case you also have to look inside the parameter > > > context menus. > > > > -- > > > David Rutten > > > [email protected] > > > Robert McNeel & Associates > > > > On Mar 14, 7:44 pm, Alpha222 <[email protected]> wrote: > > > > > error??maybe it not an error,i donot know,, > > > > i mean the cap component works well in fact, > > > > but only this time it seems...kinda > > > > disappointing,see:https://grasshopper3d.googlegroups.com/web/ddd.png?hl=en&gsc=P6We7AsA... > > > > > i'd like to post 2 more pictures to convey you my > > > > problem.https://grasshopper3d.googlegroups.com/web/QQ%E6%88%AA%E5%9B%BE%E6%9C... > > > > this is what i expect and below is what the Cap > > > > generate.https://grasshopper3d.googlegroups.com/web/QQ%E6%88%AA%E5%9B%BE%E6%9C... > > > > > any ideas? > > > > > alpha, > > > > > On Mar 15, 1:21 am, David Rutten <[email protected]> wrote: > > > > > > Hi Alpha, > > > > > > what's the error you get on the Cap component? > > > > > > -- > > > > > David Rutten > > > > > [email protected] > > > > > Robert McNeel & Associates > > > > > > On Mar 14, 6:14 pm, Alpha222 <[email protected]> wrote: > > > > > > > hello, > > > > > > > i came across a problen about the Cap component. At first , i have > > > > > > four points ,and they define a surface(using the 4point surface > > > > > > component),then i get the bounding lines using the wireframe > > > > > > component .after that ,i join them together to make a polyline.so i > > > > > > can extrude the polyline to make a surface. > > > > > > > then the problem comes: when i try to cap the surface ,it doesnot > > > > > > work!! i am confused and donot know what to do . > > > > > > > i have posted a screemshot > > > > > > athttps://groups.google.com/group/grasshopper3d/files?hl=en > > > > > > > any help?
