Difference between revisions of "Sierpinski curve"

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Line 43: Line 43:
 
<jsxgraph width="600" height="600" box="box">
 
<jsxgraph width="600" height="600" box="box">
 
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
 
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
var t = brd.createElement('turtle');
+
var t = brd.create('turtle');
 
function run() {
 
function run() {
 
   brd.suspendUpdate();
 
   brd.suspendUpdate();

Revision as of 11:59, 25 March 2011


References

The source code

function halfSierpinski(s,l) {
    if (l==0) {
       t.fd(s);
    } else {
        halfSierpinski(s,l-1);
        t.lt(45);
        t.fd(s*Math.sqrt(2));
        t.lt(45);
        halfSierpinski(s,l-1);
        t.rt(90);
        t.fd(s);
        t.rt(90);
        halfSierpinski(s,l-1);
        t.lt(45);
        t.fd(s*Math.sqrt(2));
        t.lt(45);
        halfSierpinski(s,l-1);
    }
}

function sierpinski(s,l) {
    halfSierpinski(s,l);
    t.rt(90);
    t.fd(s);
    t.rt(90);
    halfSierpinski(s,l);
    t.rt(90);
    t.fd(s);
    t.rt(90);
}
t.cs();
t.ht();
level = 3;
t.setPos(0,-300);
sierpinski(150/Math.pow(2,level),level);