qt5base-lts/examples/widgets/graphicsview/diagramscene
Edward Welbourne 02b7ec05d5 Be (somewhat more) consistent about the value of pi
Use M_PI (and friends), where possible, in favor of hand-coded
approximations of various (in)accuracies.  Where that's not available
(e.g. fragment shaders), use the same value that qmath.h uses for
M_PI, for consistency.  Replaced math.h with qmath.h in places that
defined a fall-back in case math.h omits it (it's not in the C++
standard, although M_PI is in POSIX); or removed this entirely where
it wasn't used.

Reworked some code to reduce the amount of arithmetic needed, in the
process; e.g. pulling common factors out of loops.  Revised an
example's doc to not waste time talking about using a six-sig-fig
value for pi (which we no longer do) - it really wasn't relevant, or
anything to be proud of; nor did the doc mention its later use.

Task-number: QTBUG-58083
Change-Id: I5a31e3a2b6a823b97a43209bed61a37b9aa6c05f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2017-06-20 09:53:46 +00:00
..
images Clean up diagramscene example's toolbutton icons. 2012-11-21 16:36:50 +01:00
arrow.cpp Be (somewhat more) consistent about the value of pi 2017-06-20 09:53:46 +00:00
arrow.h Examples: Replace 'Q_DECL_OVERRIDE' by 'override' 2016-06-15 09:32:30 +00:00
diagramitem.cpp Unify license header usage. 2016-03-29 10:20:03 +00:00
diagramitem.h Examples: Replace 'Q_DECL_OVERRIDE' by 'override' 2016-06-15 09:32:30 +00:00
diagramscene.cpp Unify license header usage. 2016-03-29 10:20:03 +00:00
diagramscene.h Examples: Replace 'Q_DECL_OVERRIDE' by 'override' 2016-06-15 09:32:30 +00:00
diagramscene.pro Remove warnings about examples not running in the Qt Simulator 2013-10-09 21:45:31 +02:00
diagramscene.qrc Moving .qdoc files under examples/widgets/doc 2012-08-20 12:20:55 +02:00
diagramtextitem.cpp Unify license header usage. 2016-03-29 10:20:03 +00:00
diagramtextitem.h Examples: Replace 'Q_DECL_OVERRIDE' by 'override' 2016-06-15 09:32:30 +00:00
main.cpp Unify license header usage. 2016-03-29 10:20:03 +00:00
mainwindow.cpp Unify license header usage. 2016-03-29 10:20:03 +00:00
mainwindow.h Unify license header usage. 2016-03-29 10:20:03 +00:00