Julian wrote: > Well, ideally we would develop a full-blown DRC library to run > through all the nodes. BUT, if we just want to check overlaps, it would > be a bit easier. We already store a bounding box dimension for every > element, so it would be pretty straightforward to do a rough check to > see which overlap. For detailed checks (for macros and complex items), > we could always use cairo to render the two elements in question, with > the second element drawn in a transparent color. Then we would check > the pixmap for any pixels with the combined color.
I guess we'd pick a resolution based on some sort of DRC min width/min clearance or something to avoid rounding errors being too large? I can picture this getting pretty large on a large layout. You're right, a full featured DRC engine that could do vector boolean operations would probably make this task easier. > We also already have a "selection group" (really, a GArray of > gerbv_selection_item_t items), so the function could just pass back a > selection group with all the elements together. > > e.g.: > > GArray * > gerbv_return_continuous_path ( &project, inputXcoord , inputYcoord ); > > The return array can easily be passed to the main renderer to display it > as a selected group. > > Alternatively, we could focus on getting a PCB file export working well, > and then do it through PCB maybe? I don't know enough details of what RS274-X features are used by the gerbv export to know if PCB currently supports all of whats needed. Oh, actually... PCB doesn't support blind/buried vias so that would be a limitation. I'd probably rather see it in gerbv just to avoid getting another app in the mix, but a pcb export would be neat. -Dan ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Gerbv-devel mailing list Gerbv-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gerbv-devel
