DXF import: placement and linewidth should be applied _after_ scaling

[Olivier]

Hello,

Consider this situation of importing a DXF file in KiCad:
- I would like that the lines are created with a linewidth of 0.15 mm (for example).
- If the DXF file is in micrometers, it can be imported by setting the scale factor to 0.001 in the import dialog. However, it is now necessary to change the linewidth to 150 mm in the dialog, so that it is really 0.15 mm after the import.

This workaround should not be necessary and is a bit ridiculous. When the user asks for a precise linewidth, he should obtain what he asked for.

Request: The linewidth should be applied _after_ scaling, not before.

In the same manner, the placement translation should be applied after the scaling. The user want to place the origin of the DXF in the KiCad space.

Request: The placement should be applied _after_ scaling, not before.

Olivier (KiCad 5.1.2)

[Olivier (oc-spam66)]

Wishlist ??
If the user needs to write "150 mm" in order to get "0.15 mm", this is a qualified bug!
The developer probably coded the transformations in the wrong order: linewidth and placement should be applied _after_ scaling.

[Michael Kavanagh (michaelkavanagh)]

Can you upload an example DXF file? Also provide the full version information from About KiCad -> Copy Version Info.

[Olivier (oc-spam66)]

Hello,

I attached an example DXF file, drawn in µm unit. For the detail, it is the footprint of a chip with a 4.74 mm x 3.68 mm outline and pads inside.

The goal is the following: with the "Import Vector Graphics File" window, place this chip in the PCB area at coordinates (100 mm, 100 mm), with line thickness 0.15 mm.

As a user, what I expect to fill the dialog like this:
Placement: (100, 100) mm
Linewidth: 0.15 mm
Scale: 0.001 (or 1000 depending on the logic)

This does not give the correct result, at all, as explained in my first message.

BTW: I have a graphical problem about this window (and only this window), the radio buttons for the two "Placement" choices are always both ON.

Olivier

Application: kicad
Version: 5.1.2+dfsg1-1, release build
Libraries:
    wxWidgets 3.0.4
    libcurl/7.64.0 OpenSSL/1.1.1b zlib/1.2.11 libidn2/2.0.5 libpsl/0.19.1 (+libidn2/2.0.4) libssh2/1.8.0 nghttp2/1.36.0 librtmp/2.3
Platform: Linux 4.18.0-2-amd64 x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 3.24
    Boost: 1.67.0
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.64.0
    Compiler: Clang 7.0.1 with C++ ABI 1002

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=ON
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=ON
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[Michael Kavanagh (michaelkavanagh)]

FYI the separate radio button bug has been fixed.

[KiCad Janitor (kicad-janitor)]

Fixed in revision 22fdc7f51f62a56dc3aa899f037912af60755c16
https://git.launchpad.net/kicad/patch/?id=22fdc7f51f62a56dc3aa899f037912af60755c16