From f5c57e93bbcc750778fb7a8d23bb3cbcf0e1f84d Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Thu, 23 Mar 2017 10:19:28 +0800
Subject: [PATCH] updated doc

---
 docs/lib-line3d.md | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/docs/lib-line3d.md b/docs/lib-line3d.md
index 52ec2631..e9fb7714 100644
--- a/docs/lib-line3d.md
+++ b/docs/lib-line3d.md
@@ -9,14 +9,15 @@ Creates a 3D line from two points.
 - `thickness` : The line thickness.
 - `p1Style` : The end-cap style of the point `p1`. The value must be `"CAP_BUTT"`, `"CAP_CIRCLE"` or `"CAP_SPHERE"`. The default value is `"CAP_CIRCLE"`. 
 - `p2Style` : The end-cap style of the point `p2`. The value must be `"CAP_BUTT"`, `"CAP_CIRCLE"` or `"CAP_SPHERE"`. The default value is `"CAP_CIRCLE"`. 
-- `fn` : It controlls the `$fn` value used by the `circle` or `sphere` module. The default value is `24`.
+- `$fa`, `$fs`, `$fn` : Used by the `circle` or `sphere` module internally. Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) or [the sphere module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Primitive_Solids#sphere) for more details. 
 
 ## Examples
 
 	line3d(
 	    p1 = [0, 0, 0], 
 	    p2 = [10, 2, 10], 
-	    thickness = 1
+	    thickness = 1,
+        $fn = 24
 	);   
 
 ![line3d](images/lib-line3d-1.JPG)
@@ -26,7 +27,8 @@ Creates a 3D line from two points.
 	    p2 = [10, 2, 10], 
 	    thickness = 1, 
 	    p1Style = "CAP_BUTT", 
-	    p2Style = "CAP_BUTT"
+	    p2Style = "CAP_BUTT",
+        $fn = 24
 	);   
 
 ![line3d](images/lib-line3d-2.JPG)
@@ -36,7 +38,8 @@ Creates a 3D line from two points.
         p2 = [10, 2, 10], 
         thickness = 1, 
 	    p1Style = "CAP_SPHERE", 
-	    p2Style = "CAP_SPHERE"
+	    p2Style = "CAP_SPHERE",
+        $fn = 24
     );   
 
 ![line3d](images/lib-line3d-3.JPG)