It's true, the boolean difference doesn't work with extruded surfaces. I created a boolean difference script with the VB.NET component and also doesn't work, so the problem may be either from the boolean difference sdk (which i doubt) or from the extruded surface component. I couldn't find an example of how to script a extruded surface in the wiki.
Nevertheless, I recreated a definition of what I think you are trying to achieve without extruding a surface. Maybe It will help you. http://grasshopper3d.googlegroups.com/web/woodframe.jpg http://grasshopper3d.googlegroups.com/web/woodframe.ghx On Oct 24, 4:54 pm, Rchitekt <[EMAIL PROTECTED]> wrote: > Thanks. I'm still unsure why the boolean difference isn't working on > this file. I made a separate file where I had a cube and a shpere as > two Breps... and then I used the Boolean Difference to "trim" out one > from the other, and it works like you think it would. Only, when I > try that in this file, it doesn't seem to work. I've been extruding a > planar surface to give me a closed Brep. Both the Notches and the > extruded struts show that they are closed Breps, and yet when I use > the Boolean Difference component, all that I get is a empty Brep set > as a result. Any ideas? > Thanks, > Andy > > On Oct 24, 12:36 am, David Rutten <[EMAIL PROTECTED]> wrote: > > > Hi Andy, > > > trimming is always a bit more tricky, if only because it's not clear > > which remaining parts you want to keep. If you're trimming a single > > surface with a closed loop, it's not ambiguous, but otherwise... > > > I'll look into adding a bunch of trimming components, for I doubt that > > one will do the trick. > > > -- > > David Rutten > > Robert McNeel & Associates > > > On Oct 24, 1:23 am, Rchitekt <[EMAIL PROTECTED]> wrote: > > > > David, > > > I see that there is an "Untrim" surface component in the last install, > > > but is there a trim command that I could use in this case? Would it > > > be something that will be released in the new version? Or should I > > > try to make some sort of work around? > > > Thanks, > > > Andy > > > > On Oct 23, 1:18 pm, Rchitekt <[EMAIL PROTECTED]> wrote: > > > > > I've been working on a waffle system that creates an "egg crate" > > > > structure from any set surface in Rhino. It has parametric sliders to > > > > control how far you want to extrude the surface, the number of > > > > divisions in the x and y axis and the material thickness of the actual > > > > struts. Ideally, this definition would be used to create laser cut > > > > models of any surface, and the notches would be already put into each > > > > strut. I'm having one small problem. I've generated the boundary > > > > curves (the strut outline) and I've been able to create the notches > > > > based on the material thickness. My problem is I can't seem to join > > > > the two... meaning, I can't seem to trim out the notch portion of the > > > > boundary curve and get one unified curve that could be immediately > > > > sent to the laser cutter. I've tried to create solids out of the > > > > struts and the notches and doing a boolean difference, but it didn't > > > > seem to give me any kind of usable output. I'm very close to > > > > finishing this script and I'm just curious if anyone could help me on > > > > this last step. Here's a link to the screenshot of how the script > > > > workshttp://grasshopper3d.googlegroups.com/web/waffle%20system_01.jpg?hl=en > > > > And here is a link to the > > > > definition.http://groups.google.com/group/grasshopper3d/web/waffle%20system_08.g... > > > > Thanks for your help in advance. > > > > Best, > > > > Andy
