From dae3041e6b8269da3d593a44c09e2288bb434a02 Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Mon, 9 Apr 2012 15:55:10 -0700
Subject: snapping feedback for pen tool, correct for subpaths that may lie on
 rotated canvas, and with a rotated view

---
 js/helper-classes/3D/vec-utils.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'js/helper-classes')

diff --git a/js/helper-classes/3D/vec-utils.js b/js/helper-classes/3D/vec-utils.js
index 4eacd856..0916c840 100755
--- a/js/helper-classes/3D/vec-utils.js
+++ b/js/helper-classes/3D/vec-utils.js
@@ -113,6 +113,25 @@ var VecUtils = exports.VecUtils = Object.create(Object.prototype,
         }
     },
 
+    vecDistSq : {
+            value: function( dimen,  a, b ) {
+                var sum;
+
+                if ((a.length < dimen) || (b.length < dimen))
+                {
+                    throw new Error( "dimension error in VecUtils.vecDistSq" );
+                }
+
+                var sum = 0.0;
+                for (var i=0;  i<dimen;  i++)
+                {
+                    var d = a[i] - b[i];
+                    sum += d*d;
+                }
+                return sum;
+            }
+        },
+
     vecDot : {
         value: function( dimen,  v0, v1 ) {
             if ((v0.length < dimen) || (v1.length < dimen))
-- 
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