A.I. in Second Life

Akihiro Eguchi

Why Second Life?

  Real world like environment where we can visually show the demo of our work ◦ ◦ ◦ E.g.

◦ Workflow ◦ Ontology ◦ Smart Object Autonomous Avatar Navigation Avatar Capable of Logical Reasonings Chatbots …

Retail Workflow

http://www.youtube.com/watch?v=_KY5LwFy-4s

Smart Objects

http://www.youtube.com/watch?v=Je3As2Vp6gU Akihiro Eguchi, Craig W. Thompson, "Towards a Semantic World: Smart Objects in a Virtual World," International

Journal of Computer Information Systems and Industrial

Management, Volume 3, 2011. pp. 905-911.[ pdf ]

Autonomous Avatar Navigation

http://www.youtube.com/watch?v=kO8FQt7yXcs Hung Nguyen, Akihiro Eguchi, Daniel Hooten, "In Search of a

Cost Effective Way to Develop Autonomous Floor

Mapping Robots,"9th IEEE International Symposium on Robotic and Sensors Environments (ROSE 2011), 2011, Montreal, Canada.

Other Related Works



RPI Demo of Eddie, The Four-Year-Old Avatar



Chatting with an AI in Second Life



Automated Avatars in Second Life



AI patient in second life using scripted prim and challenge response

 Joshua Eno, Craig Thompson, "

Virtual (and Real) World Ontology Services,

"

IEEE Internet Computing

, 16 May. 2011. IEEE computer Society Digital Library. IEEE Computer Society.



and etc..

How to program in SL

Tutorial of Linden Scripting Language

Create an account

1.

2.

3.

4.

Visit https://join.secondlife.com

create your account to Send me the account so that I can register you to U of A. island Download and Install the Viewer Search U of A. island and teleport

Learn how to control

 Walk  Run  Fly  Control View + drag mouse

Creating Objects

  Right click any place in the island to Edit Choose Create button  Pick one shape and click any location where you want to place the prim at.

Editing Object

   If you click the object, you can change the xyz coordinate Rotate the object with keep pressing Ctrl Change the size of the object with keep pressing Ctrl + Shift

Link Objects together

   Shift + click objects you want to link together Then, Ctrl + L to link If you want to edit only a part of linked object, click Edit linked.

STATES

 A "State" in LSL is a section that is running, and waiting for events.

 Only one state can be active at a time per script.

 Every script must have a default state.

 Except for the default state, each state is defined by the word STATE followed by the name of the state.

EVENTS

    Events are inside of states. When that state is active, those events wait to be triggered and run the code inside them. " state_entry ": triggered by the state being entered " touch_start ": triggered when anyone touches an object.

FUNCTIONS

   Functions lay inside of events.

Built in functions: ◦ all start with two lowercase L's. E.g., llSay (0, "Hello") ◦ llSay takes arguments of a number and a string. User define functions: ◦ You can define own function before ◦ E.g.: } sayOutloud( string message) { llSay (0, message); default

Scripting!

 Right Click Object -> edit -> Content -> New Script -> Open New Script  This script will basically say "Hello, Avatar!" on the public channel which is 0, and will then say "Touched." on the public channel when a user touches or clicks it.

Output in a chat box

     10m range: ◦ llWhisper(Channel, "WHISPER STUFF"); 20m range ◦ llSay(Channel, "SAY STUFF "); 100m range ◦ llShout(Channel, "SHOUT STUFF"); Anywhere on the region ◦ llRegionSay(Channel, "REGION SAY STUFF"); Use Channel 0 to talk, others (-2147483648 ~ 2147483647) for obj-to-obj communication

LSL variables examples

integer float count = 2 ; //A whole number measure = 1.2

; //A number with decimal places string list chars = "Lee" ; //Any text within " " words = ["This", "Is", "A", "List"]; list entries = ["A list may contain many types of values such as", 2, 1.2, <0.4, 0.8, 1.6>]; vector vec_2 = < 1 , 6 , 2 > ; //Generally used for position as xyz, but can be used to store 3 numbers to be parsed out later rotation _rot = < 1 , 2 , 3 , 4 > ; //Can also be used to store 4 numbers to be parsed out later

On/Off Example Using States

default { state_entry() { llSay (0, "turning on!"); } llSetColor (<1.0, 1.0, 1.0>, ALL_SIDES); { state off state_entry() { llSay (0, "turning off!"); llSetColor (<0.0, 0.0, 0.0>, ALL_SIDES); } } touch_start (integer total_number) { } state off; // sets the script to a new "state" and starts running "state off" } touch_start( integer total_number) { state default ; } If you click, it changes the state and changes the color

Use If /else.

default { state_entry (){ llSay (0, " Hello, Avatar!

"); } touch_start ( integer total_number){ if ( llDetectedKey (0) == llGetOwner ()){ llSay (0, " Owner Touched.

"); } else { llSay (0, " Someone Else Touched.

"); } } }

If the Owner touch, it says “Owner Touched.” Else it says “Someone Else Touched”

Obj-to-Obj communication



Sender

default { state_entry () { } touch_start ( integer total_number) { llWhisper (5, "SayOne"); } } 

Receiver

default { state_entry () { llListen (5,"","",""); } listen ( integer channel, string key id, string message) name, { if (message == "SayOne") { llSay (0, "One"); } } • • Object 1 sends a command “SayOne” through the channel 5.

Object 2 listens to the channel 5, and whenever it receives the message “SayOne”, It says “One”.

Use PHP

key requestid; default { state_entry (){} touch_start ( integer total_number){ requestid = llHTTPRequest (" http://.../a.php?ids=a ", [HTTP_METHOD,"GET"],""); } http_response ( key request_id, integer status, list metadata, string body){ if (request_id == requestid{ llOwnerSay(body ); } } } Send http request to a certain php file and receives the response

If you wanna program in C#

 OpenMetaverse foundation provides a C# library to directly connect to the SL  http://openmetaverse.org/

Useful Links

  List of the built-in functions: ◦ http://lslwiki.net/lslwiki/wakka.php?wakka=fun ctions LSL tutorials ◦ http://wiki.secondlife.com/wiki/LSL_Tutorial