https://bugs.kde.org/show_bug.cgi?id=372677

Dmitry Kazakov <dimul...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CONFIRMED                   |RESOLVED
      Latest Commit|                            |https://commits.kde.org/kri
                   |                            |ta/15888ba4f919e73af7d3add9
                   |                            |83ed6113e8de4f7a
         Resolution|---                         |FIXED

--- Comment #6 from Dmitry Kazakov <dimul...@gmail.com> ---
Git commit 15888ba4f919e73af7d3add983ed6113e8de4f7a by Dmitry Kazakov.
Committed on 09/12/2016 at 17:58.
Pushed by dkazakov into branch 'krita/3.1'.

Fix a NaN transformation when using 4-point perspective transform

It appeared that my matrix decomposition could not decompose an
identity matrix :( Well, we need to implement a better one, e.g.
from CSS. For now just avoid division by zero.

Most probably, the problem appeared after introduction of cursor
snapping. Before snapping identity matrix was almost impossible
to get with a mouse cursor.
Ref T4840

M  +28   -15  
plugins/tools/tool_transform2/kis_perspective_transform_strategy.cpp

https://commits.kde.org/krita/15888ba4f919e73af7d3add983ed6113e8de4f7a

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