Difference between revisions of "Fern (fractal)"

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Line 3: Line 3:
 
<jsxgraph width="600" height="400" box="box">
 
<jsxgraph width="600" height="400" box="box">
 
         board = JXG.JSXGraph.initBoard('box', {boundingbox: [-49, 71.8, 70, -5.2]});
 
         board = JXG.JSXGraph.initBoard('box', {boundingbox: [-49, 71.8, 70, -5.2]});
         var p = board.createElement('point', [0,0], {style:10,labelcolor:'#FFFFFF00'});
+
         var p = board.create('point', [0,0], {style:10,labelcolor:'#FFFFFF00'});
 
         function ifs() {
 
         function ifs() {
 
             board.suspendUpdate();
 
             board.suspendUpdate();
Line 38: Line 38:
 
<source lang="javascript">
 
<source lang="javascript">
 
         board = JXG.JSXGraph.initBoard('box', {boundingbox: [-49, 71.8, 70, -5.2]});
 
         board = JXG.JSXGraph.initBoard('box', {boundingbox: [-49, 71.8, 70, -5.2]});
         var p = board.createElement('point', [0,0], {style:10,labelcolor:'#FFFFFF00'});
+
         var p = board.create('point', [0,0], {style:10,labelcolor:'#FFFFFF00'});
 
         function ifs() {
 
         function ifs() {
 
             board.suspendUpdate();
 
             board.suspendUpdate();

Latest revision as of 13:21, 13 October 2015

Do 100 iterations:

References

The underlying JavaScript code

        board = JXG.JSXGraph.initBoard('box', {boundingbox: [-49, 71.8, 70, -5.2]});
        var p = board.create('point', [0,0], {style:10,labelcolor:'#FFFFFF00'});
        function ifs() {
            board.suspendUpdate();
            for(var i=1; i<= 100; i++) {
                var x = p.coords.usrCoords[1];
                var y = p.coords.usrCoords[2];
                var prob = Math.random();
                if(prob < 0.85) {
                    p = board.create('point', [0.85*x+0.04*y+0,-0.04*x+0.85*y+10.6], 
                                {size:1, face:'o', withLabel:false});
                }
                else if(prob >= 0.85) if (prob < 0.92) {
                    p = board.create('point', [0.2*x-0.26*y+0,0.23*x+0.22*y+10.6], 
                                {size:1, face:'o', withLabel:false});
                }
                else if(prob >= 0.92) if (prob < 0.99) {
                    p = board.create('point', [-0.15*x+0.28*y+0,0.26*x+0.24*y+4.4], 
                                {size:1, face:'o', withLabel:false});
                }
                else {
                    p = board.create('point', [0*x+0*y+0,0*x+0.16*y+0], 
                                {size:1, face:'o', withLabel:false});
                }
            }
            board.unsuspendUpdate();
        }