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Re: Fwd: Re: KiCad suggestion


On 10/7/2012 7:20 PM, Craig Southeren wrote:

I've implemented a bitmap "underlay" feature that I am using for tracing
the tracks on
vintage PCB boards. This displays a high resolution, full colour bitmap
under all of the
board layers that can be used to align tracks, components or mechanical

I have a few UI tweaks to finish it off, and I cannot yet save/load the
bitmap info, but the
code is working. I've tested it on both Linux and Windows.

I'm hoping to have patches against the latest Kicad code available this
week. I'd love some
feedback !


It sounds interesting. I may have some time to take a look at it. Do you have a branch on Launchpad that I can check out and build?

I've implemented bitmap scaling, but the same factor applies to both X
and Y.

Do you know why Scott wants independent scaling? Like rotation, I
think this would better done outside Kicad, say in Gimp, where the tools
are much
more refined.

Scott wants to use it as a drafting aid when creating odd shaped board outlines. I'm guessing that he wants to import something like a CAD drawing and use it as a template for creating the board outline. I'm not sure why he would want to scale it if it is already an accurate image. I agree with you assessment that an image manipulation tool such as the GIMP would be a much better choice.



On 8/10/2012 8:07 AM, Wayne Stambaugh wrote:
I just received and responded to the the email below.  It doesn't
happen as often as it should but every once in a while someone gives
the KiCad developers thanks for doing a good job.  So for all of you
hunched over your keyboards trying to make KiCad better with each and
every commit, thanks you deserve it.

If you have any comments or suggestions regarding my response to
Scott's request, please feel free to let me know what you think.


-------- Original Message --------
Subject: Re: KiCad suggestion
Date: Sun, 07 Oct 2012 16:55:47 -0400
From: Wayne Stambaugh <stambaughw@xxxxxxxxxxx>
To: Scott Alcock <essaysoftware@xxxxxxxxx>

On 10/7/2012 2:36 PM, Scott Alcock wrote:


I have a suggestion for KiCad's PCB layout software. Would it be
possible to add an
image to a layer in the PCB layout, something like a PNG, with
independent X
and Y scaling.

When you say add an image to a layer do you mean layers that get
translated into gerbers for photoplotting o or are talking about one of
the documentation layers that are typically used for notes?  The reason
I ask is that it would be difficult to translate an image into an
accurate representation as a gerber file.  There is already a utility
Bitmap2Component that converts images to schematic or board syntax.
Have you given that a try?

This would be very helpful for drawing board outlines to fit cases with
odd geometries.

I already have defined images in s-expression format for the next
version of the schematic file format so it shouldn't be terribly
difficult to use the same syntax in the board file.  However, there is
currently no code in Pcbnew to render or to add images.  Adding the
image file syntax to the board file is fairly trivial.  Adding the image
rendering and editing code may take a while.

Just a though.

I think it's a reasonable idea and if memory serves this may have been
discussed on the developers list in the past.  I will forward the
suggestion to the developer mailing list for input since I'm not the
only developer this change would effect.

Lastly, KiCad has come a long way in the last few years, let the group
know it's excellent !

Thanks!  Will do.  We keep chipping away at it.  KiCad keeps getting
better and better.

Best Regards,



Scott Alcock

Scott Alcock
116 Countryside Drive
Rockton, Il 61072

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