diff options
| author | Liam P. White <inkscapebrony@gmail.com> | 2015-02-25 23:08:51 +0000 |
|---|---|---|
| committer | Liam P. White <inkscapebrony@gmail.com> | 2015-02-25 23:08:51 +0000 |
| commit | caefef71482531ff82c444d552f406cbfbd360b8 (patch) | |
| tree | 193681e60b51f24b5a2679167c3f33a486d7abe0 /src/util/mathfns.h | |
| parent | fix for bug 1425317 (diff) | |
| download | inkscape-caefef71482531ff82c444d552f406cbfbd360b8.tar.gz inkscape-caefef71482531ff82c444d552f406cbfbd360b8.zip | |
Collect util/ into a static library
(bzr r13948)
Diffstat (limited to 'src/util/mathfns.h')
| -rw-r--r-- | src/util/mathfns.h | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/src/util/mathfns.h b/src/util/mathfns.h deleted file mode 100644 index 830e159da..000000000 --- a/src/util/mathfns.h +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Inkscape::Util::... some mathmatical functions - * - * Authors: - * Johan Engelen <goejendaagh@zonnet.nl> - * - * Copyright (C) 2007 Johan Engelen - * - * Released under GNU GPL, read the file 'COPYING' for more information - */ - -#ifndef SEEN_INKSCAPE_UTIL_MATHFNS_H -#define SEEN_INKSCAPE_UTIL_MATHFNS_H - -#include <2geom/point.h> - -namespace Inkscape { - -namespace Util { - -/** - * Returns area in triangle given by points; may be negative. - */ -inline double -triangle_area (Geom::Point p1, Geom::Point p2, Geom::Point p3) -{ - using Geom::X; - using Geom::Y; - return (p1[X]*p2[Y] + p1[Y]*p3[X] + p2[X]*p3[Y] - p2[Y]*p3[X] - p1[Y]*p2[X] - p1[X]*p3[Y]); -} - -/** - * \return x rounded to the nearest multiple of c1 plus c0. - * - * \note - * If c1==0 (and c0 is finite), then returns +/-inf. This makes grid spacing of zero - * mean "ignore the grid in this dimension". - */ -inline double round_to_nearest_multiple_plus(double x, double const c1, double const c0) -{ - return floor((x - c0) / c1 + .5) * c1 + c0; -} - -/** - * \return x rounded to the lower multiple of c1 plus c0. - * - * \note - * If c1==0 (and c0 is finite), then returns +/-inf. This makes grid spacing of zero - * mean "ignore the grid in this dimension". - */ -inline double round_to_lower_multiple_plus(double x, double const c1, double const c0 = 0) -{ - return floor((x - c0) / c1) * c1 + c0; -} - -/** - * \return x rounded to the upper multiple of c1 plus c0. - * - * \note - * If c1==0 (and c0 is finite), then returns +/-inf. This makes grid spacing of zero - * mean "ignore the grid in this dimension". - */ -inline double round_to_upper_multiple_plus(double x, double const c1, double const c0 = 0) -{ - return ceil((x - c0) / c1) * c1 + c0; -} - - -} - -} - -#endif -/* - Local Variables: - mode:c++ - c-file-style:"stroustrup" - c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) - indent-tabs-mode:nil - fill-column:99 - End: -*/ -// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |
