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Subject:	Re: [geda-help] pcb: blind via
To:	geda-help AT delorie DOT com
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From:	"Milan Prochac (milan AT prochac DOT sk) [via geda-help AT delorie DOT com]" <geda-help AT delorie DOT com>
Message-ID:	<b7127584-363e-2903-3382-8ba0eda2c02d@prochac.sk>
Date:	Wed, 3 Aug 2016 03:31:40 +0200
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Update:

Already implemented:
   1. internal representation. Single connection per via is implemented. =

Via stacking will be enabled later.
   2. file format with backward compatibility (if no blind/buried vias=20
are used); bugs fixed
   3. new action SetViaLayers implemented. Select action extended by=20
BuriedVias parameter. See generated pcb.pdf for more details
       3a. Undo was extended to cover new operations
   4. object report (Ctrl-R) contains information about blind/buried vias=

   5. Drawing code updated:
       5a. on GUI HID (screen) vias themselves are drawn unchanged. Any=20
recommendation how to visually distinguish blind/buriad vias from=20
through-hole vias are welcome.
       5b. on GUI HID (screen) clerarances and thermals are cut-out only =

on respective layers
       5c. on non-GUI HID exporters both vias and clearances/thermals=20
are drawn on respective layers only
   6. exporters which use standard drawing interface displays correct=20
data (tested on PostScript and gerber). Drill information will require=20
serious reworking - single plated and unplated drill is not sufficient;

What will come next
   7. ERC check (optimize rats) to evaluate connections only on proper=20
layers
   8. maintain layer information after layer operations: new layer,=20
remove layer, move layer
   9. maintain layer information after line move to another layer
10. automatically create blind/buried via when changed layer during line =

drawing; it will be controlled by option.
11. update solder mask drawing
12. GUI dialog to change via type

Current code: https://static.bastl.sk/pcb/Burried-vias-step-2.tar.gz .=20
Testers are welcome.

Milan



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