// chain( func )
// make func chainable by making it return itsReturnValue||this
function chain( func )
{
return function()
{
return func.apply( this, arguments )||this;
}
}
// initialize everything
onload = function()
{
// initialize the contexts and the fractal
window.fx =
{
'barCtx': document.getElementById('bar' ).getContext('2d'),
'fooCtx': document.getElementById('foo' ).getContext('2d'),
'logicCtx': document.getElementById('logic' ).getContext('2d'),
'renderCtx': document.getElementById('render').getContext('2d'),
'fractal': [0,0,0,0,2,0,0,0,0],
CanvasRenderingContext2D: (window.CanvasRenderingContext2D?CanvasRenderingContext2D.prototype:document.getElementById('bar' ).getContext('2d').__proto__)
}
// set( what, to )
// sets a property of the CanvasRenderingContext2D, making such operation chainable
window.fx.CanvasRenderingContext2D.set = function( what, to )
{
this[what] = to;
}
// switchTo( context )
// return another CanvasRenderingContext2D, making such operation chainable
window.fx.CanvasRenderingContext2D.switchTo = function( context )
{
return context;
}
// chain a bunch of CanvasRenderingContext2D methods
for( chainThat in {set:1,switchTo:1,clearRect:1,save:1,translate:1,rotate:1,drawImage:1,scale:1,restore:1,fillRect:1,moveTo:1,lineTo:1,beginPath:1,closePath:1,stroke:1,fill:1,arc:1} )
{
window.fx.CanvasRenderingContext2D[chainThat] = chain( window.fx.CanvasRenderingContext2D[chainThat] );
}
// let's get the party started
render();
}
// render()
function render()
{
// the time is now
var now = new Date().getTime();
// mutate the outer cells of the rug
fx
.fractal[ Math.floor(Math.random()*8+5)%9 ] = Math.floor( Math.random()*3 );
// softly kills the previous generations of the rug
fx
.fooCtx
.set( 'fillStyle', 'rgba(0,0,0,.1)' )
.fillRect( 0, 0, 192, 192 )
.set( 'fillStyle', '653' )
.switchTo( fx.barCtx )
.clearRect( 0, 0, 192, 192 );
// render 1st generation of the rug
for( var i=-1; i<9; fx.fooCtx.fillRect( (++i%3)*64+1,Math.floor(i/3)*64+1,(fx.fractal[i]&1)*62,(fx.fractal[i]&1)*62 ))
{
}
// render next generations of the rug
for( var j=0; j++<3; fx.fooCtx.drawImage( fx.barCtx.canvas,0,0 ) )
{
for( var i=-1; ++i<9; fx.barCtx.drawImage( fx.fooCtx.canvas,0,0,192,192, (i%3)*64+1,Math.floor(i/3)*64+1, (fx.fractal[i]&2)*31, (fx.fractal[i]&2)*31 ) )
{
}
}
// render rotozoomed rug
fx
.logicCtx
.set( 'globalCompositeOperation', 'source-over' )
.clearRect( 0, 0, 256, 192 )
.save()
.translate( 96, 96 )
.rotate( (now/5841%2)*Math.PI )
.scale( 1+2*((now/1274)%1), 1+2*((now/1274)%1) )
.drawImage( fx.fooCtx.canvas,0,0,192,192, -288,-288,576,576 )
.drawImage( fx.fooCtx.canvas,0,0,192,192, -96 ,-96 ,192,192 )
.drawImage( fx.fooCtx.canvas,0,0,192,192, -32 ,-32 ,64 ,64 )
.restore()
.set( 'globalCompositeOperation', 'copy' )
// prepare for hypnoglow
.switchTo( fx.renderCtx )
.set( 'globalCompositeOperation', 'source-over' )
.clearRect( 0, 0, 192, 192 )
.drawImage( fx.logicCtx.canvas, 0, 0 )
.set( 'globalCompositeOperation', 'lighter' );
// hypnoglow
for( var i=-1; ++i<6; fx.renderCtx.drawImage( fx.logicCtx.drawImage( fx.logicCtx.canvas, 0, 0, 192>>i, 192>>i, 0, 0, 96>>i, 96>>i ).canvas, 0, 0, 96>>i, 96>>i, 0, 0, 192, 192 ) )
{
}
// here we go again
setTimeout( render, 25 );
}