> > * All the new layers.
>
> Hard to parse.
Not really; layer syntax is the same for all types. We just need some
way of tagging which ones are which, and perhaps something in the UI
to keep you from doing the wrong things on specific layers (like, for
example, text on an outline layer)
> But having a list of layers that describe the physical order of the
> layers is necessary for blind and buried vias. On the other hand I
> agree that the current layer grouping system has to be removed.
I wonder if the layer grouping could *be* the stacking order? That
lets us group silk, keepout, mask, etc, with the copper layers they
correspond to, preserves the old usefulness of groups, and doesn't
change the internals of PCB as much.
> > * Support for footprint rotations at arbitrary angles.
>
> Yes, and this requires some file format changes.
:FreeRotateBuffer(45)
I think what you're asking for is for footprint definitions and
footprint instantiations to be kept separate, so that rather than
rotate the footprint, we just keep track of the angle separately.
This is lossless and still allows us to update footprints
automatically.
I.e. a footprint instantiation should have:
* ID of original footprint
* position and rotation numbers
* pin names (from gsch2pcb) and other attributes
* possible overrides for things like pad size, shape, mask gaps, etc.
> And while we are at it, why not switch to metric dimensions for
> internal representation?
Why? The only thing I'd recommend switching to is either (1) GCF[*]
units, so we can describe both metric and english precisely, or (2)
tagged units (i.e. the file says "2.1mil" instead of "210".
[*] greatest common factor, so that neither unit is a non-whole
multiple of it.
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