From 90c05523ceff96f7e053b27e5bd3f1d3f0146fa9 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Tue, 2 Jul 2019 15:43:23 +0800
Subject: [PATCH] add comments

---
 src/pixel/px_circle.scad   | 10 ++++++++++
 src/pixel/px_cylinder.scad | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/pixel/px_circle.scad b/src/pixel/px_circle.scad
index 0b47c423..45982054 100644
--- a/src/pixel/px_circle.scad
+++ b/src/pixel/px_circle.scad
@@ -1,3 +1,13 @@
+/**
+* px_circle.scad
+*
+* @copyright Justin Lin, 2019
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib2-px_circle.html
+*
+**/ 
+
 function _px_circle_y(f, y) = f >= 0 ? y - 1 : y;
 function _px_circle_ddf_y(f, ddf_y) = f >= 0 ? ddf_y + 2 : ddf_y;
 function _px_circle_f(f, ddf_y) = f >= 0 ? f + ddf_y : f;
diff --git a/src/pixel/px_cylinder.scad b/src/pixel/px_cylinder.scad
index 43f6cff9..7f7309fd 100644
--- a/src/pixel/px_cylinder.scad
+++ b/src/pixel/px_cylinder.scad
@@ -1,3 +1,13 @@
+/**
+* px_cylinder.scad
+*
+* @copyright Justin Lin, 2019
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib2-px_cylinder.html
+*
+**/ 
+
 function _px_cylinder_px_circle(radius, filled, thickness) = 
     let(range = [-radius: radius - 1])
     filled ? [