From 736e57eb26e5c40323149a9749f5e1901cfb3510 Mon Sep 17 00:00:00 2001
From: Yoonsang Lee <ysang114.lee@samsung.com>
Date: Thu, 16 Jul 2015 14:31:07 +0900
Subject: [PATCH] [DALi][DOC-213] Add Camera to dali fundamentals

Signed-off-by: Yoonsang Lee <ysang114.lee@samsung.com>
Change-Id: Ied0c6c2329da40e803e3fcf430aa9aa8d45ebc8d
---
 org.tizen.ui.guides/html/native/dali/dali_overview_n.htm | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/org.tizen.ui.guides/html/native/dali/dali_overview_n.htm b/org.tizen.ui.guides/html/native/dali/dali_overview_n.htm
index 8ef6537..0fcfe76 100755
--- a/org.tizen.ui.guides/html/native/dali/dali_overview_n.htm
+++ b/org.tizen.ui.guides/html/native/dali/dali_overview_n.htm
@@ -58,13 +58,21 @@
 
 <h3 id="coordinate" name="coordinate">Coordinate System</h3>
 
-<p>The stage has a 2D size that matches the size of the application window. The default unit 1 is 1 pixel with default camera.</p>
-
 <p>DALi uses a left-handed coordinate system with the origin at the top-left corner, with positive X to right, positive Y going downwards, and positive Z going outside the screen with default camera. This is convenient when creating 2D views.</p>
+<p>The stage has a 2D size that matches the size of the application window. The default unit 1 is 1 pixel with default camera.</p>
 
 <p class="figure">Figure: DALi coordinate system</p>  
 	<p align="center"><img alt="DALi coordinate system" src="../../images/actor_coordinates.png"/></p> 
 	
+<h3>Camera</h3>
+
+<p> DALi has a concept of camera to display its virtual 3D world to a 2D screen. There are two ways of using the camera in DALi:</p>
+
+<ul>
+	<li>For <strong>2D</strong> applications, you don't need to care about the camera at all. The default camera is alreay best suited for 2D applications (configured to have the origin of coordinate system at the top-left corner of the screen, and unit 1 as 1 pixel of the screen). This is a typical way.</li>
+	<li>For <strong>3D</strong> applications, you might want to change the view by mapulating the camera. You can translate / rotate the camera in this case. Please note that the top-left corner of the screen and unit 1 no longer are (0,0,0) and 1 pixel after manipulating the camera.</li>
+</ul>
+
 <h3>DALi Internal Structure</h3>
 
 <p>DALi consists of the following modules:</p>
-- 
2.7.4