kicad-developers team mailing list archive

[jp charras <jp.charras@xxxxxxxxxx>]

Le 26/03/2018 à 21:58, Maciej Suminski a écrit :
> Hi Jean-Pierre,
> 
>>>> -Not so minor issues:
>>>> Multilayers items (blind/buried vias, keepout zones) are incorrectly handled:
>>>> * In GAL mode, removed Multilayers items are still visible after deletion.
>>>
>>> This should be fixed.  Even if it's something as crude as checking to
>>> make sure the layer actually exists in the board before drawing an
>>> object in gal.
>>
>> I am certainly not a GAL specialist, but it is just a cache rebuild issue.
>>
>> However, apart GAL issue, Multilayers items are not correctly handled, because they are deleted
>> regardless they are still existing on not deleted layers.
> 
> I have just done the following:
> - set number of copper layers to 8
> - placed a few buried vias between In2.Cu (3rd layer from the top) and
> In5.Cu (3rd layer from the bottom)
> 
> Now when I decrease the number of Cu layers to 4, the vias remain but
> have the target layer undefined as In5.Cu does not exist anymore. Once I
> reduce the number of Cu layers to 2, they disappear. Restoring the
> original number of layers brings them back.
> 
> Is that what you see as well? As far as I understand, the items are not
> deleted as they are restored once the required layers are available. How
> to trigger the issues you describe?
> 
> Regards,
> Orson

I just committed a first fix that fixes a few issues.
Currently, a bug is still pending: a crash can happen if a undo command uses a removed item.

About vais, that are multilayers items, blind/ buried vias and especially micro vias are a tricky case.

Currently they are removed (due to a small bug in code) if they start on a removed layer.
But the actual problem is: Should we remove them if they are still living on existing layers?

And if not should we modify the layer pair.
Micro vias for instance are blind vias connecting 2 adjacent layers, so we could modify easily the
layer pair without removing them.

-- 
Jean-Pierre CHARRAS