diff options
| author | Edward Welbourne <edward.welbourne@qt.io> | 2017-03-22 13:18:52 +0100 |
|---|---|---|
| committer | Edward Welbourne <edward.welbourne@qt.io> | 2017-06-20 09:53:46 +0000 |
| commit | 02b7ec05d5713aec67577cebc18e5906b5a98598 (patch) | |
| tree | a8b7fe65eb276c50b5617e808ec26ddfdf065ab8 /examples/widgets/doc | |
| parent | 82deb0ad160459c16c77cbbea69b56387723c3a4 (diff) | |
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>
Diffstat (limited to 'examples/widgets/doc')
| -rw-r--r-- | examples/widgets/doc/src/painterpaths.qdoc | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/examples/widgets/doc/src/painterpaths.qdoc b/examples/widgets/doc/src/painterpaths.qdoc index 2cc5ff410a..bd821ac1bf 100644 --- a/examples/widgets/doc/src/painterpaths.qdoc +++ b/examples/widgets/doc/src/painterpaths.qdoc @@ -98,14 +98,9 @@ \section1 Window Class Implementation - In the implementation of the \c Window class we first declare the - constant \c Pi with six significant figures: - - \snippet painting/painterpaths/window.cpp 0 - - In the constructor, we then define the various painter paths and - create corresponding \c RenderArea widgets which will render the - graphical shapes: + In the \c Window constructor, we define the various painter paths + and create corresponding \c RenderArea widgets which will render + the graphical shapes: \snippet painting/painterpaths/window.cpp 1 |