Posts Tagged ‘newmedia


Upgrade! Tijuana, April 29th, 2009

Come see a discussion of Becoming Dragon and the Transborder Immigrant Tool, along with a few other amazing new media projects on April 29th at Lui Velazquez!


Becoming Dragon on cover of the San Diego Reader and at Open Studios

Guess who’s on the cover of the San Diego Reader this week? ME! So pick up a copy and check it out, or read it online here and leave the author a comment!

I’m very happy, and very annoyed with this article on the cover of this week’s issue of the major San Diego weekly publication. I’m happy that the project is getting so much exposure. I’m very unhappy that the author chose to ignore my choice of pronouns, present the whole project as some mad scientist project “at tax payer’s expense” and put a ridiculous picture on the cover instead of one of the many photos and second life screenshots from the performance. At least the author had the courage to admit at the end of the article that I told him what pronouns to use and that he chose not to. Overall, I think that he quoted me at length, and accurately, on the core issues on the performance, which I really appreciate.

Also, if you’d like to see documentation of Becoming Dragon, life size, up close and personal, come to Open Studios at UCSD next Saturday, April 4th!


Motion Capture Second Life Script

Tonight we posted the code for Stereoscopic mode in the Second Life viewer to the SL developer’s list, here:

Also, below is the code for the Second Life scripts that handle our motion capture interface for Becoming Dragon. This script simply reads an XML file over http, extracts the coordinates out and moves the object that contains this script to those coordinates. Then, one only needs to attach the object to your avatar and click on the object to start the motion capture. I left in my comments and debg code. In the next few days we’ll make our code for reading the live Vicon motion capture data out and translating them into XML.

Really, this would be most useful if you use a few objects to represent your avatar and make your avatar invisible. With such a system, by getting the base coordinates right for each body part, you could have full body motion capture. We simply did not have the time to get multiple objects working and mappe into a dragon body, so we only used one coordinate to do position tracking within the room at CRCA, mapping into the room in Second Life.

Since the vicon code is separate, these scripts could easily be used with a Wii, if you use a program like aka.wiimote or Darwiin remote to get the four points of mocap data from the wiibar and translate them to xml. Then these scripts could read that xml over http and viola! wii Second Life motion capture.

Here’s the code:

integer in_world = 0;
key http_request_id;
float timer_secs = 1;
integer moving = 0;
integer moves = 0;
integer max_moves = 60;

//begin xml reading code

list markers;

parseElement(string line)
if(line == “<markers>”)
//llOwnerSay(“markers line found, starting new markers list”);
markers = [];

// determine type of element
string element = llGetSubString(line, 0, llSubStringIndex(line, ” “) – 1);
element = llToLower(element);

// parse known elements

parseMarkerElement(llGetSubString(line, llStringLength(element) + 1, -1));

parseMarkerElement(string line) {

//llOwnerSay(“parsing line: “+line);

if(line == “</markers>”) return;

// parse attribute name/value pairs
list parts = llParseString2List(line, [“=\'”, “\’ “, “\'”, “>”, “<\/”, “\'”], []);
integer n = llGetListLength(parts);
integer i;

// set default values
string position_x = “”;
string position_y = “”;
string position_z = “”;
string visibility = “”;
string marker_name = “”;

// loop through name/value pairs
for(i = 0; i < n; i += 2)
// read name/value pair

string name = llList2String(parts, i);
name =
name = llToLower(name);
string value = llList2String(parts, i + 1);

//find content of marker node, slightly hackish
if(value == “marker”) {
value = name;
name = “name”;

// assign known values
if(name == “position_x”) position_x = value;
if(name == “position_y”) position_y = value;
if(name == “position_z”) position_z = value;
if(name == “visibility”) visibility = value;
if(name == “name”) marker_name = value;

// add new item
if(visibility == “true”)

markers += [marker_name];
markers += [position_x];
markers += [position_y];
markers += [position_z];

//end xml reading code

default {

state_entry()  {

if(in_world == 0)
llOwnerSay(“Hi, I’m the new movement object xml!”);
in_world = 1;



http_response(key request_id, integer status, list metadata, string body)      {

//if ( moves < max_moves ) {

list coords;

//llOwnerSay(“http response received…”);

if (request_id == http_request_id)  {

//llSetText(body, <0,0,1>, 1);

// parse out xml elements
//list lines = llParseString2List(body, [“/>”,”<“, “>”, “\n”], []);
list lines = llParseString2List(body, [“\n”], []);

// loop through elements
integer n = llGetListLength(lines);
integer i;
for(i = 0; i < n; i++)
parseElement(llList2String(lines, i));

//llOwnerSay(“markers: “+(string)markers);

//move by offsets in html body
//= llGetPos();

vector position;
vector offset;
list thiscoord;

if(llGetListLength(markers) > 2) {

//llOwnerSay(“using marker “+llList2String(markers, 0) );

//change these numbers, after the +’s to your origin in your sim
offset.x = (llList2Float(markers, 1)/1000) + 183;

offset.y = (llList2Float(markers, 2)/1000) + 16;

offset.z = (llList2Float(markers, 3)/1000) + 33;

if(offset.x > 0 && offset.y > 0 && offset.z > 0)

llMoveToTarget(offset, 0.1);

//llOwnerSay(“+++ Moving to “+(string)offset.x+” , “+
// (string)offset.y+” , “+
// (string)offset.z);

llSetText((string)offset.x+”,”+(string)offset.y+”,”+(string)offset.z, <0,0,1>, 1);


} //end if coords

} //end if (request_id == http_request_id)

// } else {  //end if moves < 5

// llSetTimerEvent(0);
// llOwnerSay(“Newmove  : “+(string)moves+” moves! Stopping movement.”);
// moving = 0;
// moves = 0;


timer() {

//llOwnerSay((string)timer_secs + ” second timer elapsed, sending http request…”);
http_request_id = llHTTPRequest(“;, [], “”);


touch_start(integer total_number) {

if(moving == 0) {
llOwnerSay(“Touched! Timer starting. sending http request…”);
http_request_id = llHTTPRequest(“;, [], “”);
moving = 1;
} else {
llOwnerSay(“Touched! Stopping movement.”);
moving = 0;
moves = 0;



And here’s a sample xml data file…

<?xml version='1.0' encoding='ISO-8859-1'?>
		<marker position_x='316.474' position_y='213.859' position_z='42.4289'visibility='true'>Default:Marker1</marker>
		<marker position_x='540.871' position_y='125.609' position_z='44.586'visibility='true'>Default:Marker2</marker>
		<marker position_x='602.447' position_y='263.058' position_z='47.1262'visibility='true'>Default:Marker3</marker>
		<marker position_x='634.26' position_y='337.013' position_z='48.9091'visibility='true'>Default:Marker4</marker>
		<marker position_x='0' position_y='0' position_z='0'visibility='false'>wand:Marker1</marker>
		<marker position_x='0' position_y='0' position_z='0'visibility='false'>wand:Marker2</marker>
		<marker position_x='0' position_y='0' position_z='0'visibility='false'>wand:Marker3</marker>



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