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From:	Kai-Martin Knaak <knaak AT iqo DOT uni-hannover DOT de>
Subject:	Re: [geda-user] gerber export - outline layer
Date:	Wed, 11 Jul 2012 02:11:11 +0200
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Colin D Bennett wrote:

> Anyway, I've found that the current "sublayers" (simply "layers" in
> current pcb terminology) are seldom useful, since you can't show or
> hide specific layers in a layer group,

I sent a patch to geda-user mailinglist for discussion a few weeks 
before it was closed. Unfortunately, it got southward in the wake of 
the shut-down.


> and there are no useful
> per-layer properties (except color) that can be set.  I thought it
> would be useful to help separate the ground flood polygons on the
> bottom of a 2-layer board from the ground traces, but the only real
> benefit is that you can assign a different display color to it.

Main reason, why I put my ground flooding in separate (sub)layers: 
Recalculation of polgons sucks processor and graphics rsources big
time. The GUI becomes sluggish. With my largest layout rendering 
on zoom and pan was down to about 2 FPS (measured with the benchmark()
command). This gets significantly better if I make the layers that 
contain the polygons invisible. 

---<)kaiamrtin(>---

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