From 371131a67325c28fedf85dacec5b6b123c657ced Mon Sep 17 00:00:00 2001
From: cilix42 <cilix42@users.sourceforge.net>
Date: Mon, 19 May 2008 16:01:37 +0000
Subject: [PATCH] Nearest point from point to line (simplicistic convenience
 function)

---
 src/2geom/nearest-point.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/2geom/nearest-point.h b/src/2geom/nearest-point.h
index 43b76c3ab..73ac0c3ce 100644
--- a/src/2geom/nearest-point.h
+++ b/src/2geom/nearest-point.h
@@ -48,6 +48,17 @@
 namespace Geom
 {
 
+/*
+ * Given a line L specified by a point A and direction vector v,
+ * return the point on L nearest to p. Note that the returned value
+ * is with respect to the _normalized_ direction of v!
+ */
+inline double nearest_point(Point const &p, Point const &A, Point const &v)
+{
+    Point d(p - A);
+    return d[0] * v[0] + d[1] * v[1];
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // D2<SBasis> versions
 
-- 
2.30.2