Re: gEDA-user: pcb crooked traces

[Andrew Poelstra <asp11@xxxxxx>]

On Fri, Oct 08, 2010 at 06:31:33PM +0800, Steven Michalske wrote:
> 
> If so...  Guys change the converters and have at your hearts content.
> It should be a 2 hour patch.
>

Then we have file-format compatibility to deal with, and I'm sure there
are weird cases that implicitly depend on the base unit (which should be
rooted out at some point anyway, I know).

For file-format compatibility, setting the scale-factor to 254 if none
is specified, should do the trick.
 
> Now for conversion errors, are you really seeing errors in your metric PCBs?
> 

Maybe not, but we -do- see the cursor position given as 8.0000, 7.9999
instead of whole numbers, and these long strings overlap the GUI sometimes
(I put a patch on the tracker about this when I first got here.) Hard
to read, and irritating.

> As far as I am concirned the internal unit is meaningless provided it
> is fine enough.
> 

Yes, but millimeters cannot be expressed as a whole number of mils.
Mils, however, can be expressed as a whole number of nanometers. So
there's an important distinction.

> ... 
> 
> BTW, I'd vote for 1 unit, and a scale value.  That is if you are
> making a 10 meter antenna,  Then you set the PCB's scale to 0.1mm.
>
+1


Andrew
 


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