From 3b25ebdc31b234cc646116111713bd5860929380 Mon Sep 17 00:00:00 2001
From: Diederik van Lierop <mailat-signdiedenrezidotnl>
Date: Tue, 19 Oct 2010 22:50:03 +0200
Subject: [PATCH] Use a better snap metric for constrained snapping (i.e.
 calculate the distance to the original point, not the projected point). This
 should more accurately predict what the user wants to snap to

---
 src/line-snapper.cpp   | 6 +++---
 src/object-snapper.cpp | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/line-snapper.cpp b/src/line-snapper.cpp
index be64438ed..22a964d43 100644
--- a/src/line-snapper.cpp
+++ b/src/line-snapper.cpp
@@ -99,8 +99,8 @@ void Inkscape::LineSnapper::constrainedSnap(SnappedConstraints &sc,
                 Geom::Coord d = Geom::L2(gridguide_line.versor()); // length of versor, needed to normalize the versor
                 if (d > 0) {
                     Geom::Point v = l*gridguide_line.versor()/d;
-                    _addSnappedPoint(sc, p_proj + v, Geom::L2(pp - (p_proj + v)), p.getSourceType(), p.getSourceNum(), true);
-                    _addSnappedPoint(sc, p_proj - v, Geom::L2(pp - (p_proj - v)), p.getSourceType(), p.getSourceNum(), true);
+                    _addSnappedPoint(sc, p_proj + v, Geom::L2(p.getPoint() - (p_proj + v)), p.getSourceType(), p.getSourceNum(), true);
+                    _addSnappedPoint(sc, p_proj - v, Geom::L2(p.getPoint() - (p_proj - v)), p.getSourceType(), p.getSourceNum(), true);
                 }
             }
         } else {
@@ -119,7 +119,7 @@ void Inkscape::LineSnapper::constrainedSnap(SnappedConstraints &sc,
 
             if (inters) {
                 Geom::Point t = constraint_line.pointAt((*inters).ta);
-                const Geom::Coord dist = Geom::L2(t - pp);
+                const Geom::Coord dist = Geom::L2(t - p.getPoint());
                 if (dist < getSnapperTolerance()) {
                     // When doing a constrained snap, we're already at an intersection.
                     // This snappoint is therefore fully constrained, so there's no need
diff --git a/src/object-snapper.cpp b/src/object-snapper.cpp
index b11e857dc..7e7e25921 100644
--- a/src/object-snapper.cpp
+++ b/src/object-snapper.cpp
@@ -633,7 +633,7 @@ void Inkscape::ObjectSnapper::_snapPathsConstrained(SnappedConstraints &sc,
                 // Convert to desktop coordinates
                 (*p_inters) = _snapmanager->getDesktop()->doc2dt(*p_inters);
                 // Construct a snapped point
-                Geom::Coord dist = Geom::L2(p_proj_on_constraint - *p_inters);
+                Geom::Coord dist = Geom::L2(p.getPoint() - *p_inters);
                 SnappedPoint s = SnappedPoint(*p_inters, p.getSourceType(), p.getSourceNum(), k->target_type, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true, k->target_bbox);;
                 // Store the snapped point
                 if (dist <= tolerance) { // If the intersection is within snapping range, then we might snap to it
-- 
2.30.2