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fractals.class.js
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fractals.class.js
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var fractals = {
phi: 1.6180339887,
julia_base : function(x, y, it, cr, ci) {
var xx = x*x, yy = y*y;
do {
y = (x+x)*y + ci;
x = xx - yy + cr;
yy = y*y;
xx = x*x;
if (xx+yy > 4) {
y = (x+x)*y + ci;
x = xx - yy + cr;
yy = y*y;
xx = x*x;
break;
}
} while(--it)
return {
it : it, x : x, y : y, xx : xx, yy : yy
};
},
julia1 : function(x, y, it) {
return fractals["julia_base"](x, y, it, this.phi - 2, this.phi - 1);
},
julia2 : function(x, y, it) {
return fractals["julia_base"](x, y, it, 1-this.phi, 0);
},
julia3 : function(x, y, it) {
return fractals["julia_base"](x, y, it, 0.285, 0);
},
julia4 : function(x, y, it) {
return fractals["julia_base"](x, y, it, .285, 0.01);
},
julia5 : function(x, y, it) {
return fractals["julia_base"](x, y, it,-0.835, -0.2321);
},
julia6 : function(x, y, it) {
return fractals["julia_base"](x, y, it, -0.7, -0.3);
},
julia7 : function(x, y, it) {
return fractals["julia_base"](x, y, it, 0, 1);
},
julia8 : function(x, y, it) {
return fractals["julia_base"](x, y, it, -0.391, -0.587);
},
julia9 : function(x, y, it) {
return fractals["julia_base"](x, y, it,-0.123, 0.745);
},
julia10 : function(x, y, it) {
return fractals["julia_base"](x, y, it,-0.75, 0);
},
julia11 : function(x, y, it) {
var zr, zi;
var cr = 0.6;
var ci = 1.1;
var xx = x*x, yy = y*y;
do {
zr = x - (x?(x<0?-1:1):0);
zi = y;
x = cr*zr-ci*zi;
y = cr*zi+ci*zr;
yy = y*y;
xx = x*x;
if (xx+yy > 4)
break;
} while(--it)
return {
it : it, x : x, y : y, xx : xx, yy : yy
};
},
juliasine_base : function(x, y, it, cr, ci) {
var xx = x*x, yy = y*y;
var z, expy, expmy;
var c = [cr, ci];
do {
expy = Math.exp(y);
expmy = Math.exp(-y);
z = [Math.sin(x) * (expy + expmy)/2, Math.cos(x) * (expy - expmy)/2];
x = c[0]*z[0]-c[1]*z[1];
y = c[0]*z[1]+c[1]*z[0];
yy = y*y, xx = x*x;
if (xx+yy > 500)
break;
} while(--it)
return {
it : it, x : x, y : y, xx : xx, yy : yy
};
},
juliasine : function(x, y, it) {
return fractals["juliasine_base"](x, y, it, 4, 1, 0.1);
},
juliasine2 : function(x, y, it) {
return fractals["juliasine_base"](x, y, it, 4, 1, 0.3);
},
juliacosine_base : function(x, y, it, cr, ci) {
var xx = x*x, yy = y*y;
var z, expy, expmy;
var c = [cr, ci];
do {
expy = Math.exp(y);
expmy = Math.exp(-y);
z = [Math.cos(x) * (expy + expmy)/2, - Math.sin(x) * (expy - expmy)/2];
x = c[0]*z[0]-c[1]*z[1];
y = c[0]*z[1]+c[1]*z[0];
yy = y*y, xx = x*x;
if (xx+yy > 500)
break;
} while(--it)
return {
it : it, x : x, y : y, xx : xx, yy : yy
};
},
juliacosine : function(x, y, it) {
return fractals["juliacosine_base"](x, y, it, 4, 1, 0.6);
},
juliacosine2 : function(x, y, it) {
return fractals["juliacosine_base"](x, y, it, 4, Math.PI/2 * 1.5, Math.PI/2 * 0.05);
},
juliacosine3 : function(x, y, it) {
var xx = x*x, yy = y*y;
var z, expy, expmy;
var c = [1, 0.1];
do {
expy = Math.exp(y);
expmy = Math.exp(-y);
z = [Math.cos(x) * (expy + expmy)/2, - Math.sin(x) * (expy - expmy)/2];
x = c[0]*z[0]-c[1]*z[1];
y = c[0]*z[1]+c[1]*z[0];
tx = x;
x = -y;
y = tx;
yy = y*y, xx = x*x;
if (xx+yy > 500)
break;
} while(--it)
return {
it : it, x : x, y : y, xx : xx, yy : yy
};
},
}