Yeah, Trim and Split methods are still in progress. I made a bunch of easy ones, but I'll have to eventually get around to trimming BReps and surfaces with curves/surfaces/breps
-- David Rutten Robert McNeel & Associates On Nov 5, 8:35 am, Rchitekt <[EMAIL PROTECTED]> wrote: > Ben, > This is a little bit off topic from Ben's original question, but I > have been working on a modified version of my original waffle script > which would work on a polysurface (Brep) instead of just a single > surface. With the first version, each strut always had a uniform > depth because it was linked to a slider that was driving the extrusion > in the Z-direction. With a definition that works on a polysurface, > each rib would have non-uniform depth, depending on the cross-section > of the solid object you are using for the script. (Here's a > screenshot:http://grasshopper3d.googlegroups.com/web/Waffle_Strut_polysurface.jp... > ) The definition has to take a different approach from my original > definition, because the notches now vary in depth according the cross- > section of the polysurface. I have a working definition that creates > the notches and creates the boundary curves, and my thought was to use > the new Trim command to trim out the small notch area on the boundary > curve. However, the trim command doesn't seem to work the way you > would think that it should. I have an extruded Brep list that > represents the extruded "notch". When I use this Brep list and the > boundary curves, it doesn't seem to trim out the inside of the line > within the Brep. I also tried a second method, where I used the new > split command. I then used the Length component to measure the length > of each individual segment. By using a 2 variable function, I could > check if the segment lengths were short enough to be close to the > notch width and thus giving me a boolean list with true values for > lengths that were long enough... essentially, the segments I want to > keep. By feeding that boolean list to a dispatch component, I could > essentially cull the short segments. However, this doesn't seem to > work either, and this method gives me the same result as the Trim > method. Here's a screenshot of the > definition:http://grasshopper3d.googlegroups.com/web/Waffle_Strut_polysurface_de... > I don't know if the Trim and Split commands are still "in progress" or > if my methods are wrong. If anyone has any feedback to these issues, I > would greatly appreciate it. > Thanks, > Andy > > On Nov 4, 10:14 pm, Rchitekt <[EMAIL PROTECTED]> wrote: > > > Hi Ben, > > I downloaded your file (I had trouble with your .3dm file, but I just > > used my own surface) and see some of the things going on with your > > definition. I think until there is a Join Surfaces component (which I > > think would be really helpful) then I think the method you are using > > will be very difficult. I went back to my original script, to see if > > there was a way that I could extrude the intersection wire according > > to the normal of the surface, instead of just the Z-axis vector... but > > I had issues too. I have installed the new version of grasshopper > > (today's release) and I'm getting a really strange error when I hover > > over the Extrude component in my original definition. Basically, I > > had just solved the intersection between a plane and the surface to > > give me a wire along the surface. I then just extruded the curves in > > the Z-direction, only when I hover over the component I get a message > > that says the extrusion has an invalid topology (here's a screen shot > > of the > > componenthttp://grasshopper3d.googlegroups.com/web/Invalid+Topology.jpg?hl=en&;... > > ) This didn't happen in the previous version of grasshopper. When I > > go to the next component, it does seem to pass on the information and > > continues working, however, if I try to turn on the "Preview" for the > > extrude component, my Rhino scene crashes. I replicated the crash a > > few times, and it always happens every time I turn the preview on for > > the extrude component. I was wondering if this is a bug with the new > > release. I will continue to try to come up with a solution for how to > > get the struts to be extruded according to the normal of the surface. > > -Andy
