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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
199087 changed files with 3378941 additions and 0 deletions
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56
Task/Julia-set/JavaScript/julia-set.js Normal file
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var maxIterations = 450, minX = -.5, maxX = .5,
minY = -.5, maxY = .5, wid, hei, ctx,
jsX = 0.285, jsY = 0.01;
function remap( x, t1, t2, s1, s2 ) {
var f = ( x - t1 ) / ( t2 - t1 ),
g = f * ( s2 - s1 ) + s1;
return g;
}
function getColor( c ) {
var r, g, b, p = c / 32,
l = ~~( p * 6 ), o = p * 6 - l,
q = 1 - o;
switch( l % 6 ) {
case 0: r = 1; g = o; b = 0; break;
case 1: r = q; g = 1; b = 0; break;
case 2: r = 0; g = 1; b = o; break;
case 3: r = 0; g = q; b = 1; break;
case 4: r = o; g = 0; b = 1; break;
case 5: r = 1; g = 0; b = q; break;
}
var c = "#" + ( "00" + ( ~~( r * 255 ) ).toString( 16 ) ).slice( -2 ) +
( "00" + ( ~~( g * 255 ) ).toString( 16 ) ).slice( -2 ) +
( "00" + ( ~~( b * 255 ) ).toString( 16 ) ).slice( -2 );
return (c);
}
function drawFractal() {
var a, as, za, b, bs, zb, cnt, clr
for( var j = 0; j < hei; j++ ) {
for( var i = 0; i < wid; i++ ) {
a = remap( i, 0, wid, minX, maxX )
b = remap( j, 0, hei, minY, maxY )
cnt = 0;
while( ++cnt < maxIterations ) {
za = a * a; zb = b * b;
if( za + zb > 4 ) break;
as = za - zb; bs = 2 * a * b;
a = as + jsX; b = bs + jsY;
}
if( cnt < maxIterations ) {
ctx.fillStyle = getColor( cnt );
}
ctx.fillRect( i, j, 1, 1 );
}
}
}
function init() {
var canvas = document.createElement( "canvas" );
wid = hei = 800;
canvas.width = wid; canvas.height = hei;
ctx = canvas.getContext( "2d" );
ctx.fillStyle = "black"; ctx.fillRect( 0, 0, wid, hei );
document.body.appendChild( canvas );
drawFractal();
}