diff options
Diffstat (limited to 'basegfx')
| -rw-r--r-- | basegfx/source/numeric/ftools.cxx | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/basegfx/source/numeric/ftools.cxx b/basegfx/source/numeric/ftools.cxx index a67bc56bd74e..994bd29e30eb 100644 --- a/basegfx/source/numeric/ftools.cxx +++ b/basegfx/source/numeric/ftools.cxx @@ -44,6 +44,40 @@ namespace basegfx } } } + + double normalizeToRange(double v, const double fRange) + { + if(fTools::lessOrEqual(fRange, 0.0)) + { + // with a zero (or less) range, all normalizes to 0.0 + return 0.0; + } + + const bool bNegative(fTools::less(v, 0.0)); + + if(bNegative) + { + if(fTools::moreOrEqual(v, -fRange)) + { + // in range [-fRange, 0.0[, shift one step + return v + fRange; + } + + // re-calculate + return v - (floor(v/fRange)*fRange); + } + else + { + if(fTools::less(v, fRange)) + { + // already in range [0.0, fRange[, nothing to do + return v; + } + + // re-calculate + return v - (floor(v/fRange)*fRange); + } + } } // end of namespace basegfx /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |