Returns x rounded to the nearest nplaces decimal places. Implemented in terms of Inkscape::round, i.e. we make no guarantees as to what happens if x is half way between two rounded numbers. Add a note to the documentation if you care which candidate is chosen for such case (round towards infinity, +infinity, 0, or "even"). Note: nplaces is the number of decimal places without using scientific (e) notation, not the number of significant figures. This function may not be suitable for values of x whose magnitude is so far from 1 that one would want to use scientific (e) notation. The current implementation happens to allow nplaces to be negative: e.g. nplaces=2 means rounding to a multiple of 100. May or may not be useful. Definition at line 25 of file decimalround.h. References round(). Referenced by ColorRGBA::getIntValue(), and NR::Point::round(). { double const multiplier = std::pow(10.0, nplaces); return Inkscape::round( x * multiplier ) / multiplier; }
