A.I. in Second Life

1. A.I. in Second Life Akihiro Eguchi

2. 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 …

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

4. 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]

5. 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.

6. 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..

7. How to program in SL Tutorial of Linden Scripting Language

8. Create an account • Visit https://join.secondlife.com to create your account • 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

9. Learn how to control • Walk • Run • Fly • Control View + drag mouse

10. 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.

11. 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

12. 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.

13. 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.

14. 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.

15. 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 beforedefault • E.g.: sayOutloud(string message) { llSay(0, message); }

16. 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.

17. 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

18. LSL variables examples integer count = 2; //A whole number float measure = 1.2; //A number with decimal places string chars = "Lee"; //Any text within " " list 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

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

20. 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”

21. Obj-to-Obj communication • Receiver • default • { • state_entry() • { • llListen(5,"","",""); • } • listen(integer channel,stringname, key id, string message) • { • if(message == "SayOne") • { • llSay(0, "One"); • } • } • Sender default { state_entry() { } touch_start(integer total_number) { llWhisper(5, "SayOne"); } } • 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”.

22. Use PHP keyrequestid; default { state_entry(){} touch_start(integertotal_number){ requestid = llHTTPRequest("http://.../a.php?ids=a", [HTTP_METHOD,"GET"],""); } http_response(keyrequest_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

23. If you wanna program in C# • OpenMetaverse foundation provides a C# library to directly connect to the SL • http://openmetaverse.org/

24. Useful Links • List of the built-in functions: • http://lslwiki.net/lslwiki/wakka.php?wakka=functions • LSL tutorials • http://wiki.secondlife.com/wiki/LSL_Tutorial