Re: gEDA-user: pcb, next mm issue

[Stefan Salewski <mail@xxxxxxxxxxxx>]

Some further investigation:

Joinings depends on zoom factor.
If I draw the some trace while zommed in very much, joining is much
better. Seems that endpoints of lines are not mapped to exact
grid-points, but depends on screen/mouse coordinate. I think this should
not be the case. Coordinates of entered endpoints of traces should not
depend on zooming factor when grid is active -- endpoints should be
always exact grid points nearest to mouse pointer.


Am Sonntag, den 19.10.2008, 22:56 +0200 schrieb Stefan Salewski:
> Generally I am using mm grid units in pcb, because most of my elements
> have mm spacing, i.e. FPGA 0.5mm.
> 
> I have noticed that pcb does not connect adjoining diagonal line
> segments (traces) very well -- sometimes pieces of traces on same
> diagonal are joined to one large trace, but often they are not joined,
> so short selectable pieces remain. This is not a big problem, but I
> assume this makes pcb- and gerber files larger ...
> 
> It was my assumption that this may be related to rounding, because pcb
> program has to "see" that adjoining traces have same direction.
> 
> Indeed, with mil grid units segments are joined to one larger trace
> perfectly. Tested with 0.1mm and 5mil grid size.
> 
> Best regards
> 
> Stefan Salewski
>  




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