Thanks again Julian, Yes, I got the rendering to work, and upon further inspection, see where you are using the same functions in the "easier" method. I did reply to the list with a couple more questions, but I had some attachments and it is caught up in moderation.
I'll take a look at DRC. I have looked at this before and come to the same realization that you really need to compare the final polygons that are created. Never thought about rendering to a surface and looking at the pixels between objects. I also thought about the idea of creating the polygons (nets) and then expanding each polygon by half the clearance value desired, then rendering two nets and looking for overlaps. I saw in a previous post where you talked about using different colors and transparency to achieve this. The problem I have always come up with here is the complexity of actually figuring out the final net polygons from the 1000s of nets that get created. I'll take a look at the surface option and see what I can figure out. If you are a moderator and can free my other message, that would be great. I think there might be a copy or two of this message stuck out there in moderation as well since I originally sent it a couple times from an email that wasn't signed up to the list. If you can delete those duplicates, it would be great. Thanks, Curtis On 4/1/2011 4:22 PM, Julian Lamb wrote: > Curtis, > No, nothing has ever been started on the DRC side. One option is > to write a routine that steps through the netlist of each layer, and > then use your own geometry calcs to calculate the clearance between > every other net in the layer. There is a bounding box calculation > done for every net already, so you can use that to eliminate 99% of > the checks by making sure the two nets are even close. > The width check will basically just involve stepping through the > net and looking for the minimum line width for drawn lines. > However, this will honestly be a difficult endeavor. With macros, > polygons, knockouts, step and repeats, etc...this will be very > difficult to do. > The other idea is to render the layer to a surface, and then > inspect the surface to figure out pixels between objects. > > Did you get your cairo PNG rendering to work? Did the zoom_to_fit > function do the trick? > Julian > > On 04/01/2011 03:53 PM, Curtis C. Pope wrote: >> Hi everyone. In searching the list, I found a topic "probe >> connectivity?" from back in 2009 where it looked like someone was going >> to start prototyping a DRC function. Does anyone know if there was any >> work done on that? I am looking for basic width/clearance checks and >> would love a starting point. I am using libgerbv to write my own >> rendering engine and DRC for my website. >> >> Any help/info would be greatly appreciated. >> >> Thanks, >> Curtis >> HobbyPCB >> >> ------------------------------------------------------------------------------ >> >> >> Create and publish websites with WebMatrix >> Use the most popular FREE web apps or write code yourself; >> WebMatrix provides all the features you need to develop and >> publish your website. http://p.sf.net/sfu/ms-webmatrix-sf >> _______________________________________________ >> Gerbv-devel mailing list >> Gerbv-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/gerbv-devel > > ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf _______________________________________________ Gerbv-devel mailing list Gerbv-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gerbv-devel
