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Mail Archives: geda-user/2012/02/23/13:21:17

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Date: Thu, 23 Feb 2012 10:20:10 -0800
From: Colin D Bennett <colin AT gibibit DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] gschem filled polygons?
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On Thu, 23 Feb 2012 01:22:17 +0100
Kai-Martin <kmk AT familieknaak DOT de> wrote:

> On 02/22/2012 06:30:08 PM, Colin D Bennett wrote:
> > product appearance drawings,
> 
> In the schematic? I wouldn't make this a priority.

I might like to have a rough outline of the board shape (for
interestingly-shaped boards) with the mechanical features from the
schematic placed on it.  For instance, showing where the
mounting holes are.

Anyway, it's up to the user to decide how to use it.  If gschem had
general support for vector graphics elements (i.e. curves, the most
general drawing element), then the user can do anything.

> > Inkscape is nice, and I like it, but it is a bloated hog of a
> > program.
> 
> IMHO, it is quite lean compared to its commercial competitors
> (Coreldraw, Adobe illustrator).

Perhaps.  But I don't think it can be compared to Adobe
Illustrator -- I have no direct experience using Illustrator, but I
think it is quite a bit more powerful than Inkscape.

> > It takes about 20 seconds to load on my fast dual-core
> > laptop.
> 
> win or lin?
> Inkscape starts in less than 5 sec on my not so fast dual-core
> Debian powered desktop.

Linux -- Ubuntu 11.10.  But after measuring it, I stand corrected.
Inkscape starts “cold” (not recently run) in 6 seconds.  That's
still way too long. It feels like minutes.  The main problem is
that it still takes about 5 seconds even when it's “hot”.

In constrast, the GIMP takes 5 seconds to start cold,
but only 2 seconds hot.

LibreCAD starts in 1 second.

Konqueror starts cold in 2 seconds, hot in less than one second.

So, a hot start of 5 seconds is like eternity.

> > but not at the cost of making gschem slow.  Its speed and
> > lightweightness is a great strength.
> 
> I beg to differ on the speed issue. With some of my heavier
> schematics, there is a noticeable lag for pan and zoom. This is
> just 2D with a limited set of colors and no complex
> transformations involved. On anything that remotely resembles a
> contemporary desktop computer, pan and zoom should be blazingly
> fast. Since Peter Cliftons added openGL and other magic to pcb,
> the layout GUI beats gschem hands down for the same project (on
> my desktop).

I'm sure your designs are much bigger than mine, but in my
experience gschem zooming and panning is smooth as butter.
In pcb I have seen small slowdowns only when I zoom out so that the
grid dots are about 2 pixels apart -- they seem to slow it down a
lot.  But I'm using the nVIDIA control panel to enable
antialiasing... it makes the silk screen text in particular look
MUCH nicer in pcb.

Regards,
Colin

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