Chaos Scripts

[IanniX]

Hi all,

I’m trying to use Iannix for the production of graphical scores based on the output of chaotic differential equations. For a test I am trying to implement and map the Lorenz equations in some form. My plan right now is to use a for() loop to iterate some number of Euler approximations of the functions and use the output of x, y, and z to generate curves, linesegments, triggers, ect… I’m coming to an anonymous parse error on the line where I instantiate my for loop. Would it be appropriate to post my code, as it is, here? I’ve really hit a wall. My Javascript is not so good so I may be making some glaring mistakes. Thanks.

[Anonymous]

Yes ! But please copy/paste your code in your post 🙂

[Anonymous]

Sorry for the lateness of my response. I am still interested in learning how to do this. Here is my code:

//Script “Lorenz Graph”
//Insert requests for global variables:
function onConfigure() {
title(“Lorenz attractor”);
ask(“General”, “initial x”, “xo”, 0);
ask(“General”, “initial y”, “yo”, 0);
ask(“General”, “Initial z”, “zo”, 0);
ask(“Parameters”, “sigma”, “s”, 10);
ask(“Parameters”, “beta”, “b”, 2.66666);
ask(“Parameters”, “row”, “p”, 28);
ask(“Euler”, “Delta t”, “dt”,.01);
ask(“Euler”, “Number of Steps”, “r”, 10);

var x = xo;
var y = yo;
var z = zo;
var i;
}

//Insert code to create score:
function onCreate() {
run(“clear”);
run(“zoom 100”);
run(“center 0 0”);
run(“rotate 0 0 0”);
run(“registerTexture background 0 0 0 0 ./Tools/background.jpg”);

//Add curve
run(“add curve 1001”);
run(“setPos current ” + xo + ” ” + yo + ” ” + zo);
run(“setPointAt current 0 ” + xo + ” ” + yo + ” ” + zo);
for(var index = 0; index <= r; index++)
{
i = index;
//evaluate Euler method
x = xo + ( s * ( y – x )) * dt;
y = yo + ( x* ( p – z ) – y ) * dt;
z = zo + ( x * y – b * z ) * dt;
//create line at xo, yo, zo to x, y, z
DrawEul(x, y, z);
//set new initial values
xo = x;
yo = y;
zo = z;
}
run(“add cursor 1”);
run(“setCurve current lastCurve”);
run(“setSpeed current auto 100”);

}
//Custom function
function DrawEul(ex, wy, ze) {
//run(“setPointAt current pNum ” + exo + ” ” + wyo + ” ” + zeo);
run(“setPointAt current pNum ” + ex + ” ” + wy + ” ” + ze);
}

[Anonymous]

Ok, you have some different mistakes in your code. x0/y0/z0 have to be declared in onCreate function. Moreover, the setPointAt JavaScript syntax was wrong.
Here is the correct code… but all points are on (0, 0, 0)…
Fon’t forget you can trace your code by using console(“hello world”); function (and log trace appear in “Received messages” in IanniX.

//Script "Lorenz Graph"

//Insert requests for global variables:

function onConfigure() {

title("Lorenz attractor");

ask("General", "initial x", "xo", 0);

ask("General", "initial y", "yo", 0);

ask("General", "Initial z", "zo", 0);

ask("Parameters", "sigma", "s", 10);

ask("Parameters", "beta", "b", 2.66666);

ask("Parameters", "row", "p", 28);

ask("Euler", "Delta t", "dt",.01);

ask("Euler", "Number of Steps", "r", 10);



}



//Insert code to create score:

function onCreate() {

var x = xo;

var y = yo;

var z = zo;

var i;



run("clear");

run("zoom 100");

run("center 0 0");

run("rotate 0 0 0");

run("registerTexture background 0 0 0 0 ./Tools/background.jpg");



//Add curve

run("add curve 1001");

run("setPos current " + xo + " " + yo + " " + zo);

run("setPointAt current 0 " + xo + " " + yo + " " + zo);

for(var index = 0; index <= r; index++) {

//evaluate Euler method

x = xo + ( s * ( y - x )) * dt;

y = yo + ( x* ( p - z ) - y ) * dt;

z = zo + ( x * y - b * z ) * dt;

i = index;

//create line at xo, yo, zo to x, y, z

console(x + " " + y + " " + z);

DrawEul(index, x, y, z);

//set new initial values

xo = x;

yo = y;

zo = z;

}

run("add cursor 1");

run("setCurve current lastCurve");

run("setSpeed current auto 100");



}



//Custom function

function DrawEul(index, ex, wy, ze) {

//run("setPointAt current pNum " + exo + " " + wyo + " " + zeo);

run("setPointAt current " + index + " " + ex + " " + wy + " " + ze);

}

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