Mail Archives: geda-user/2015/09/13/12:06:53
DJ, thank you for your comments! You catched lots of errors!
> "Angular data is stored in signed integer,"
>
> Not floating point? What about 7 evenly rotated LEDs, or 22.5 degree
> rotations? Given location is nanometers, you should have an equally
> precise unit for other measurements.
Good point. I want to avoid floating point. What about 0.001 degrees?
> Also, specify where 0 degrees points.
Yes sir.
> Why limit yourself to 32 layers? PCB has no such limitation.
I know. Have you seen a board more then 32 conductive layers? I want to keep
the layer stack fixed.
> You don't have a paste layer group.
That is true. I missed it. It'll be in the next version.
> You don't support multiple silk layers on top/bottom (different
> colors?)
Is this really needed? It is so rare, one can define an addition layer, and
tell the fab house "I want layer 1234 in color pink on top of the regular
white top-silk".
Is this doable?
> PCB doesn't support rotated ovals (i.e. general ellipses). Do you
> want to?
>
> Arc is missing radius. Do you want to support arcs with different
> width/height? What about segments of rotated ellipses? Arbitrary
> splines?
As primitive object, I only want to support arcs, and straight lines. A GUI
can be written to build anything from these. I try to have small amount of
primitive object types.
> Do you want to support flex cables, where the "top" layer changes
> depending on where you are on the pcb?
Yes, I want to support that. But I think the 'top' layer becomes the flex
cable, and the prepreg below is milled from the board. So the conductive layer
structure doesn't change. I've never seen SMDs on the milled part.
However, SMDs can be placed on inner layers. This is called buried components.
Although I've never seen such board, but I know they exist.
Lev
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73 de HA5OGL
Op.: Levente
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