bugMyPaint - Bugs: bug #20730, Symmetry mode eats horizontal...

 
 
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bug #20730: Symmetry mode eats horizontal strokes of classic/kinfe brush with radius 1.10

Submitted by:  Libra Rian <zrzz>
Submitted on:  Tue 09 Apr 2013 04:38:54 PM UTC  
 
Severity: 3 - NormalPriority: 5 - Normal
Status: Ready For TestPrivacy: Public
Assigned to: NoneOpen/Closed: Closed
Release: 819eae4Planned Release: None
Operating System: Lubuntu 12.10/Compiz

Tue 24 Jun 2014 09:33:17 PM UTC, comment #3:

[This is a canned response, please forgive the broken formatting: it's one of the many things Gna! unfortunately does not do well.]

This bug tracker will shortly be moving to Github. As part of this process, we are reviewing old bug reports on gna.org.

This bug was marked as "Ready for Test" or "Works for Me" some time ago, but was still classified as Open and no feedback has been submitted since then.
I am therefore assuming that the problem has been fixed to everyone's satisfaction (or was't reproducible by anybody else).

If you believe that this bug still affects the most recent git master of MyPaint (and thus the next release), please feel free to open a new issue on
Github about it. Our new issue trackers are:

https://github.com/mypaint/mypaint/issues
https://github.com/mypaint/libmypaint/issues

Andrew Chadwick <achadwick>
Project Administrator
Mon 22 Apr 2013 12:56:43 AM UTC, comment #2:

Cool bug! Thanks for the fix: tested and pushed.

https://gitorious.org/mypaint/mypaint/commit/6f8c5bc95cb919e483a43b48607494fc6f19ce06

Andrew Chadwick <achadwick>
Project Administrator
Sat 20 Apr 2013 06:15:36 AM UTC, comment #1:

FOUND IT!FOUND IT!FOUND IT!FOUND IT!

Symmetry mode is broken due type conversion. Look at draw_dab(brushlib/mypaint-tiled-surface.c:587). When applying symmetry mode it converts float x to int symm_x. And that breaks things

Fix in this commit

https://gitorious.org/~zrzz/mypaint/librarian-mypaint/commit/6403715c8a8868e0e044ae9081d55cf9606940e4

Libra Rian <zrzz>
Tue 09 Apr 2013 04:38:54 PM UTC, original submission:

Funny thing that is triggered under very specific conditions:

1) Launch mypaint
2) Select classic/knife brush, decrease radius to 1.10
3) Turn on symmetry mode
4) Draw line as horizontal as you can. Mouse or tablet - does not matter.

Symmetry mode will not reproduce horizontal lines correctly. Only horizontal lines. And only for radius=1.10. Other lines and radiuses are fine.

Now interesting part: open brush settings(Ctrl-B), click "update last stroke" and change brush radius. Horizontal stroke with radius != 1.10 will be symmetrically drawn more correctly.

Attach has two screenshots where I update radius. Notice that at radius=1.10 stroke in symmetry-drawn part is invisible.

Libra Rian <zrzz>

 

Attached Files

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by achadwick (Posted a comment)
  • -unavailable- added by zrzz (Submitted the item)
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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Tue 24 Jun 2014 09:33:17 PM UTCachadwickOpen/ClosedOpen=>Closed
    Mon 22 Apr 2013 12:56:43 AM UTCachadwickStatusNone=>Ready For Test
    Tue 09 Apr 2013 04:38:54 PM UTCzrzzAttached File-=>Added 2013-04-09-232438_1280x960_scrot.png, #17726
      Attached File-=>Added 2013-04-09-232456_1280x960_scrot.png, #17727
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