From: Scott Worley <ScottWorley@ScottWorley.com>
Date: Tue, 25 Dec 2012 05:44:08 +0000 (-0800)
Subject: A helper function for generating pathnormals
X-Git-Url: http://git.scottworley.com/nt3d/commitdiff_plain/7731ed7a4c4845e60f937dd1f082b1ce24939607?ds=sidebyside;hp=c92a9d3f963401b999f661dde190a739ebbeafde

A helper function for generating pathnormals
---

diff --git a/nt3d.js b/nt3d.js
index fd57824..62d898e 100644
--- a/nt3d.js
+++ b/nt3d.js
@@ -83,6 +83,14 @@ nt3d = {
 			return nt3d.sub(path[i+1], path[i-1]);
 		};
 	},
+	pathnormals_from_point: function(path, p) {
+		// Use this with any point that is not on any path tangent line
+		var pathnormals = [];
+		for (var i = 0; i < path.length; i++) {
+			pathnormals.push(this.sub(path[i], p));
+		}
+		return pathnormals;
+	},
 	to_function: function(thing, make_indexer) {
 		// If thing is a point, just yield thing every time.
 		// If thing is a list of points && make_indexer, index into thing.