kicad-developers team mailing list archive

[Wayne Stambaugh <stambaughw@xxxxxxxxx>]

This requires a file version bump and code that tests for prior versions
before converting the units on read.  At that point, the file will no
longer be compatible with prior version of KiCad.  I'm not opposed to
this but I'm not sure it's worth the headaches it will cause.

On 11/08/2017 03:33 PM, Oliver Walters wrote:
> What about a controversial idea:
> 
> Read "at" dimensions as inches, but new files write "offset" in mm. 
> 
> This preserves read compatibility but fixes the units issue going forward. 
> 
> On 9 Nov 2017 03:15, "jp charras" <jp.charras@xxxxxxxxxx
> <mailto:jp.charras@xxxxxxxxxx>> wrote:
> 
>     Le 08/11/2017 à 11:05, Oliver Walters a écrit :
>     > Attached is a patch that fixes the problems I found in my 3D model
>     array investigation. As
>     > discussion on that is stalled for now, this patch simply fixes the
>     model offset issues.
>     >
>     > 1. Display offset units in 3D preview window
>     >
>     > - Offset units are displayed (either inches or mm)
>     >
>     > 2. Fix offset in 3D rendering
>     >
>     > - It appears that the internal units for 3D model offset (mm) were
>     being multiplied by 25.4 incorrectly
>     > - Fixed rendering in OGL and Raytracing
>     >
>     > 3. Fix offset in 3D export
>     >
>     > - VRML export
>     > - STEP export
>     >
>     > Oliver
> 
>     Hi Oliver,
> 
>     Looks like currently, Pcbnew stores 3D offset in inches, unlike any
>     other value.
>     This is very annoying, but we have to leave with that.
> 
>     Therefore the patch breaks compatibility with any other Pcbnew
>     version, if 3D offset is not 0.
> 
> 
>     --
>     Jean-Pierre CHARRAS
> 
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