Grid thickness: 1.5, weired zoom artifacts

[Thomas Pointhuber]

When setting the Grid thickness to 1.5, I see the grid changing after every zoom step quite a bit. Setting it to 1 or 2 fixes the problem.

# Version Information

Application: kicad
Version: (5.1.0-rc1-110-gf40dfa276), debug build
Libraries:
    wxWidgets 3.0.4
    libcurl/7.63.0 OpenSSL/1.1.1a zlib/1.2.11 libidn2/2.1.0 libpsl/0.20.2 (+libidn2/2.1.0) libssh2/1.8.0 nghttp2/1.35.1
Platform: Linux 4.20.6-arch1-1-ARCH 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: 1.69.0
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.63.0
    Compiler: Clang 7.0.1 with C++ ABI 1002

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    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

[Seth Hillbrand (sethh)]

I assume that this is in Accelerated. Is that correct?

Also, I'm not quite sure what I'm looking for when you say changing. Can you say a bit more about it? I'm afraid the video didn't quite clear it up for me. Do you mean that at 1.5, the grid thicknesses don't always show major ticks?

[Thomas Pointhuber (pointhi)]

Yes, It's in Accelerated.

with Changing I mean:

zoom steps:

0: rough grid
1: grid basically disappears
2. grid is back to style like in (0)
3. fine grid
4. fine grid, but visually very different (you can actually differ between grid-points and the rough grid)
5. fine grid like in (3)

[John Beard (john-j-beard)]

With the new pixel-snapped grids, do fractional pixels even make sense any more for the OpenGL grid?

[Seth Hillbrand (sethh)]

Fixed in 30612ca62d