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#include "preferences.h"
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// overloaded constructor
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Inkscape::SnappedPoint::SnappedPoint(Geom::Point const &p, SnapSourceType const &source, SnapTargetType const &target, Geom::Coord const &d, Geom::Coord const &t, bool const &a, bool const &fully_constrained)
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: _point(p), _source(source), _target(target), _distance(d), _tolerance(std::max(t,1.0)), _always_snap(a)
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Inkscape::SnappedPoint::SnappedPoint(Geom::Point const &p, SnapSourceType const &source, long source_num, SnapTargetType const &target, Geom::Coord const &d, Geom::Coord const &t, bool const &a, bool const &fully_constrained)
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: _point(p), _source(source), _source_num(source_num), _target(target), _distance(d), _tolerance(std::max(t,1.0)), _always_snap(a)
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// tolerance should never be smaller than 1 px, as it is used for normalization in isOtherSnapBetter. We don't want a division by zero.
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_at_intersection = false;
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_pointer_distance = NR_HUGE;
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Inkscape::SnappedPoint::SnappedPoint(Geom::Point const &p, SnapSourceType const &source, SnapTargetType const &target, Geom::Coord const &d, Geom::Coord const &t, bool const &a, bool const &at_intersection, bool const &fully_constrained, Geom::Coord const &d2, Geom::Coord const &t2, bool const &a2)
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: _point(p), _source(source), _target(target), _at_intersection(at_intersection), _fully_constrained(fully_constrained), _distance(d), _tolerance(std::max(t,1.0)), _always_snap(a),
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Inkscape::SnappedPoint::SnappedPoint(Geom::Point const &p, SnapSourceType const &source, long source_num, SnapTargetType const &target, Geom::Coord const &d, Geom::Coord const &t, bool const &a, bool const &at_intersection, bool const &fully_constrained, Geom::Coord const &d2, Geom::Coord const &t2, bool const &a2)
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: _point(p), _source(source), _source_num(source_num), _target(target), _at_intersection(at_intersection), _fully_constrained(fully_constrained), _distance(d), _tolerance(std::max(t,1.0)), _always_snap(a),
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_second_distance(d2), _second_tolerance(std::max(t2,1.0)), _second_always_snap(a2)
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// tolerance should never be smaller than 1 px, as it is used for normalization in
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_point = Geom::Point(0,0);
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_source = SNAPSOURCE_UNDEFINED,
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_target = SNAPTARGET_UNDEFINED,
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_at_intersection = false;
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_fully_constrained = false;
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// (both the snap distance and the pointer distance are measured in document pixels, not in screen pixels)
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Geom::Coord const dist_pointer_other = other_one.getPointerDistance();
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Geom::Coord const dist_pointer_this = getPointerDistance();
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// Weight factor: controls which node should be preferred for snapping, which is either
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Geom::Coord const dist_pointer_other = other_one.getPointerDistance();
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Geom::Coord const dist_pointer_this = getPointerDistance();
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// Weight factor: controls which node should be preferred for snapping, which is either
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// the node with the closest snap (w = 0), or the node closest to the mousepointer (w = 1)
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Inkscape::Preferences *prefs = Inkscape::Preferences::get();
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double w = prefs->getDoubleLimited("/options/snapweight/value", 0.5, 0, 1);
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if (!(w == 1 && dist_pointer_this == dist_pointer_other)) {
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// When accounting for the distance to the mouse pointer, then at least one of the snapped points should
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// have that distance set. If not, then this is a bug. Either "weighted" must be set to false, or the
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// mouse pointer distance must be set.
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g_assert(dist_pointer_this != NR_HUGE || dist_pointer_other != NR_HUGE);
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// The snap distance will always be smaller than the tolerance set for the snapper. The pointer distance can
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// however be very large. To compare these in a fair way, we will have to normalize these metrics first
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// The closest pointer distance will be normalized to 1.0; the other one will be > 1.0
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// The snap distance will be normalized to 1.0 if it's equal to the snapper tolerance
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double const norm_p = std::min(dist_pointer_this, dist_pointer_other);
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double const norm_t_other = std::min(50.0, other_one.getTolerance());
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double const norm_t_this = std::min(50.0, getTolerance());
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dist_other = w * dist_pointer_other / norm_p + (1-w) * dist_other / norm_t_other;
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dist_this = w * dist_pointer_this / norm_p + (1-w) * dist_this / norm_t_this;
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if (!(w == 1 && dist_pointer_this == dist_pointer_other)) {
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// When accounting for the distance to the mouse pointer, then at least one of the snapped points should
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// have that distance set. If not, then this is a bug. Either "weighted" must be set to false, or the
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// mouse pointer distance must be set.
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g_assert(dist_pointer_this != NR_HUGE || dist_pointer_other != NR_HUGE);
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// The snap distance will always be smaller than the tolerance set for the snapper. The pointer distance can
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// however be very large. To compare these in a fair way, we will have to normalize these metrics first
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// The closest pointer distance will be normalized to 1.0; the other one will be > 1.0
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// The snap distance will be normalized to 1.0 if it's equal to the snapper tolerance
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double const norm_p = std::min(dist_pointer_this, dist_pointer_other);
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double const norm_t_other = std::min(50.0, other_one.getTolerance());
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double const norm_t_this = std::min(50.0, getTolerance());
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dist_other = w * dist_pointer_other / norm_p + (1-w) * dist_other / norm_t_other;
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dist_this = w * dist_pointer_this / norm_p + (1-w) * dist_this / norm_t_this;