Grid thickness: 1.5, weired zoom artifacts

Bug #1816748 reported by Thomas Pointhuber on 2019-02-20
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Seth Hillbrand

Bug Description

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
    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:

Thomas Pointhuber (pointhi) wrote :
Seth Hillbrand (sethh) wrote :

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) wrote :

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) wrote :

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

Seth Hillbrand (sethh) wrote :

Fixed in 30612ca62d

Changed in kicad:
assignee: nobody → Seth Hillbrand (sethh)
milestone: none → 5.1.0
status: New → Fix Committed
Changed in kicad:
status: Fix Committed → Fix Released
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