Add script panel docs

docs/interface/interface.rst

@@ -16,9 +16,10 @@ You can have multiple windows, the document title shows what version of Dust3D y
 3. Dock Panel
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Dock panel contains multiple tabs, including `Parts Tree`_, Material List, Rig Weight View, Pose List, Motion List, and Script Editor.
+Dock panel contains multiple tabs, including `Parts Tree`_, Material List, Rig Weight View, Pose List, Motion List, and `Script Panel`_.
 
 .. _Parts Tree: http://docs.dust3d.org/en/latest/interface/parts_panel.html
+.. _Script Panel: http://docs.dust3d.org/en/latest/interface/script_panel.html
 
 4. Rendered Model
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

docs/interface/script_panel.rst

@@ -0,0 +1,22 @@
+Script Panel
+------------------------
+
+.. image:: https://raw.githubusercontent.com/huxingyi/dust3d/master/docs/images/dust3d-ui-script.png
+
+Dust3D supports JavaScript language to generate the source document, which then been fed into the mesh generator to construct the final model.
+
+1. Rendered Model
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Result model generated from the script.
+
+2. Script Editor
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Paste your JavaScript code here, or type in the code directly. The script runner will be invoked automatically once there is any change detected from the script editor.
+If there is an error or console output from the script, the output will show under the editor.
+
+3. Variables Panel
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You can create input control from script and receive the user input variable which can be used to adjust the settings for the procedural generation.