From 5cad15ce87da3c0f83877f666e72e89e056aa76b Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Tue, 14 Mar 2017 09:08:55 +0800
Subject: [PATCH] added headers

---
 src/circular_sector.scad | 13 +++++++++++++
 src/line2d.scad          | 12 ++++++++++++
 src/polyline2d.scad      | 12 ++++++++++++
 3 files changed, 37 insertions(+)

diff --git a/src/circular_sector.scad b/src/circular_sector.scad
index b7bd6ab8..2ab98180 100644
--- a/src/circular_sector.scad
+++ b/src/circular_sector.scad
@@ -1,3 +1,16 @@
+/**
+* circular_sector.scad
+*
+* Create a circular sector. You can pass a 2 element vector to define the central angle. It provides a fn parameter consistent with the $fn parameter of the circle module.
+* 
+* @copyright Justin Lin, 2017
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib-circular_sector.html
+*
+**/
+
+
 module circular_sector(radius, angles, fn = 24) {
     r = radius / cos(180 / fn);
     step = -360 / fn;
diff --git a/src/line2d.scad b/src/line2d.scad
index 0055d2c0..b8e83bb0 100644
--- a/src/line2d.scad
+++ b/src/line2d.scad
@@ -1,3 +1,15 @@
+/**
+* line2d.scad
+*
+* Creates a line from two points.
+* 
+* @copyright Justin Lin, 2017
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib-line2d.html
+*
+**/
+
 // The end-cap style
 CAP_BUTT = 0;
 CAP_SQUARE = 1;
diff --git a/src/polyline2d.scad b/src/polyline2d.scad
index b3b23084..2f17df03 100644
--- a/src/polyline2d.scad
+++ b/src/polyline2d.scad
@@ -1,3 +1,15 @@
+/**
+* polyline2d.scad
+*
+* Creates a polyline from a list of x, y coordinates. It depends on the line2d module so you have to include line2d.scad.
+* 
+* @copyright Justin Lin, 2017
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib-polyline2d.html
+*
+**/
+
 module polyline2d(points, width, startingStyle = CAP_SQUARE, endingStyle = CAP_SQUARE, round_fn = 24) {
     module line_segment(index) {
 	    styles = index == 1 ? [startingStyle, CAP_ROUND] : (