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| author | Armin Le Grand <alg@apache.org> | 2012-08-23 14:03:21 +0000 |
|---|---|---|
| committer | Caolán McNamara <caolanm@redhat.com> | 2013-05-19 16:50:31 +0100 |
| commit | 5a6ed660ec74e445a827c7aa41e4793c64a46271 (patch) | |
| tree | de8dedebb69847d3e96c371e0c19554051364470 /include/basegfx | |
| parent | 2d55b2e5ae0d4f1a05e1ce5b20a7b342d6ea8b1d (diff) | |
Resolves: #i120596# Optimized grid primitive
added some tooling to basegfx
(cherry picked from commit 97fa4faaa0b09724cf98dbf22390b283ba57b41c)
Conflicts:
basegfx/inc/basegfx/numeric/ftools.hxx
Change-Id: Ib15c43cf4d5b50605ec596dab498e3a678f3734a
Diffstat (limited to 'include/basegfx')
| -rw-r--r-- | include/basegfx/numeric/ftools.hxx | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/basegfx/numeric/ftools.hxx b/include/basegfx/numeric/ftools.hxx index 70dcabe1a190..75e24b0d8574 100644 --- a/include/basegfx/numeric/ftools.hxx +++ b/include/basegfx/numeric/ftools.hxx @@ -136,6 +136,36 @@ namespace basegfx return v / M_PI_2 * 90.0; } + /** Snap v to nearest multiple of fStep, from negative and + positive side. + + Examples: + + snapToNearestMultiple(-0.1, 0.5) = 0.0 + snapToNearestMultiple(0.1, 0.5) = 0.0 + snapToNearestMultiple(0.25, 0.5) = 0.0 + snapToNearestMultiple(0.26, 0.5) = 0.5 + */ + double snapToNearestMultiple(double v, const double fStep); + + /** Snap v to the range [0.0 .. fWidth] using modulo + */ + double snapToZeroRange(double v, double fWidth); + + /** Snap v to the range [fLow .. fHigh] using modulo + */ + double snapToRange(double v, double fLow, double fHigh); + + /** return fValue with the sign of fSignCarrier, thus evtl. changed + */ + inline double copySign(double fValue, double fSignCarrier) + { +#ifdef WNT + return _copysign(fValue, fSignCarrier); +#else + return copysign(fValue, fSignCarrier); +#endif + } class BASEGFX_DLLPUBLIC fTools { |