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#include "libnr/nr-values.h"
#include "libnr/nr-point-fns.h"
#include "geom.h"
#include "line-snapper.h"
#include "snapped-line.cpp"
Inkscape::LineSnapper::LineSnapper(SPNamedView const *nv, NR::Coord const d) : Snapper(nv, d)
{
}
void Inkscape::LineSnapper::_doFreeSnap(SnappedConstraints &sc,
Inkscape::Snapper::PointType const &t,
NR::Point const &p,
bool const &f,
std::vector<NR::Point> &points_to_snap,
std::list<SPItem const *> const &it) const
{
/* Snap along x (i.e. to vertical lines) */
_doConstrainedSnap(sc, t, p, f, points_to_snap, component_vectors[NR::X], it);
/* Snap along y (i.e. to horizontal lines) */
_doConstrainedSnap(sc, t, p, f, points_to_snap, component_vectors[NR::Y], it);
}
void Inkscape::LineSnapper::_doConstrainedSnap(SnappedConstraints &sc,
Inkscape::Snapper::PointType const &t,
NR::Point const &p,
bool const &f,
std::vector<NR::Point> &points_to_snap,
ConstraintLine const &c,
std::list<SPItem const *> const &it) const
{
Inkscape::SnappedPoint s = SnappedPoint(p, NR_HUGE);
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(p);
for (LineList::const_iterator i = lines.begin(); i != lines.end(); i++) {
/* Normal to the line we're trying to snap along */
NR::Point const n(NR::rot90(NR::unit_vector(c.getDirection())));
NR::Point const point_on_line = c.hasPoint() ? c.getPoint() : p;
/* Constant term of the line we're trying to snap along */
NR::Coord const q = dot(n, point_on_line);
/* Try to intersect this line with the target line */
NR::Point t = NR::Point(NR_HUGE, NR_HUGE);
IntersectorKind const k = intersector_line_intersection(n, q, component_vectors[i->first], i->second, t);
if (k == INTERSECTS) {
const NR::Coord dist = L2(t - p);
//Store any line that's within snapping range
if (dist < getDistance()) {
_addSnappedLine(sc, t, dist, c.getDirection(), t);
//SnappedInfiniteLine dummy = SnappedInfiniteLine(t, dist, c.getDirection(), t);
//sc.infinite_lines.push_back(dummy);
}
}
}
}
/*
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 :
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