From b0a9bcb9e1da6e5192cf37aedcd3b87a4041b911 Mon Sep 17 00:00:00 2001
From: "Johan B. C. Engelen" <jbc.engelen@swissonline.ch>
Date: Mon, 23 Nov 2009 21:15:06 +0000
Subject: update 2geom. needed for extrude lpe

(bzr r8840)
---
 src/2geom/d2-sbasis.cpp | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

(limited to 'src/2geom/d2-sbasis.cpp')

diff --git a/src/2geom/d2-sbasis.cpp b/src/2geom/d2-sbasis.cpp
index 2c52e4782..aef989fc7 100644
--- a/src/2geom/d2-sbasis.cpp
+++ b/src/2geom/d2-sbasis.cpp
@@ -58,8 +58,19 @@ Piecewise<D2<SBasis> > rot90(Piecewise<D2<SBasis> > const &M){
   return result;
 }
 
-Piecewise<SBasis> dot(Piecewise<D2<SBasis> > const &a, 
-		      Piecewise<D2<SBasis> > const &b){
+/** @brief Calculates the 'dot product' or 'inner product' of \c a and \c b
+ * @return  \f[
+ *      f(t) \rightarrow \left\{ 
+ *      \begin{array}{c}
+ *      a_1 \bullet b_1 \\
+ *      a_2 \bullet b_2 \\
+ *      \ldots \\
+ *      a_n \bullet b_n \\
+ *      \end{array}\right.
+ * \f]
+ * @relates Piecewise */
+Piecewise<SBasis> dot(Piecewise<D2<SBasis> > const &a, Piecewise<D2<SBasis> > const &b)
+{
   Piecewise<SBasis > result;
   if (a.empty() || b.empty()) return result;
   Piecewise<D2<SBasis> > aa = partition(a,b.cuts);
@@ -72,6 +83,30 @@ Piecewise<SBasis> dot(Piecewise<D2<SBasis> > const &a,
   return result;
 }
 
+/** @brief Calculates the 'dot product' or 'inner product' of \c a and \c b
+ * @return  \f[
+ *      f(t) \rightarrow \left\{ 
+ *      \begin{array}{c}
+ *      a_1 \bullet b \\
+ *      a_2 \bullet b \\
+ *      \ldots \\
+ *      a_n \bullet b \\
+ *      \end{array}\right.
+ * \f]
+ * @relates Piecewise */
+Piecewise<SBasis> dot(Piecewise<D2<SBasis> > const &a, Point const &b)
+{
+  Piecewise<SBasis > result;
+  if (a.empty()) return result;
+
+  result.push_cut(a.cuts.front());
+  for (unsigned i = 0; i < a.size(); ++i){
+    result.push(dot(a.segs[i],b), a.cuts[i+1]);
+  }
+  return result;
+}
+
+
 Piecewise<SBasis> cross(Piecewise<D2<SBasis> > const &a, 
 			Piecewise<D2<SBasis> > const &b){
   Piecewise<SBasis > result;
-- 
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