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@ -1,152 +0,0 @@
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var sketch = Sketch.create(),
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center = {
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x: sketch.width / 2,
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y: sketch.height / 2
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},
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orbs = [],
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dt = 1,
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opt = {
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total: 0,
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count: 100,
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spacing: 2,
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speed: 65,
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scale: 1,
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jitterRadius: 0,
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jitterHue: 0,
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clearAlpha: 10,
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toggleOrbitals: true,
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orbitalAlpha: 100,
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toggleLight: true,
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lightAlpha: 5,
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clear: function(){
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sketch.clearRect( 0, 0, sketch.width, sketch.height ),
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orbs.length = 0;
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}
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};
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var Orb = function( x, y ){
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var dx = ( x / opt.scale ) - ( center.x / opt.scale ),
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dy = ( y / opt.scale ) - ( center.y / opt.scale );
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this.angle = atan2( dy, dx );
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this.lastAngle = this.angle;
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this.radius = sqrt( dx * dx + dy * dy );
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this.size = ( this.radius / 300 ) + 1;
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this.speed = ( random( 1, 10 ) / 300000 ) * ( this.radius ) + 0.015;
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};
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Orb.prototype.update = function(){
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this.lastAngle = this.angle;
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this.angle += this.speed * ( opt.speed / 50 ) * dt;
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this.x = this.radius * cos( this.angle );
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this.y = this.radius * sin( this.angle );
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};
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Orb.prototype.render = function(){
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if(opt.toggleOrbitals){
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var radius = ( opt.jitterRadius === 0 ) ? this.radius : this.radius + random( -opt.jitterRadius, opt.jitterRadius );
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radius = ( opt.jitterRadius != 0 && radius < 0 ) ? 0.001 : radius;
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sketch.strokeStyle = 'hsla( ' + ( ( this.angle + 90 ) / ( PI / 180 ) + random( -opt.jitterHue, opt.jitterHue ) ) + ', 100%, 50%, ' + ( opt.orbitalAlpha / 100 ) + ' )';
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sketch.lineWidth = this.size;
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sketch.beginPath();
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if(opt.speed >= 0){
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sketch.arc( 0, 0, radius, this.lastAngle, this.angle + 0.001, false );
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} else {
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sketch.arc( 0, 0, radius, this.angle, this.lastAngle + 0.001, false );
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};
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sketch.stroke();
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sketch.closePath();
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};
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if(opt.toggleLight){
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sketch.lineWidth = .5;
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sketch.strokeStyle = 'hsla( ' + ( ( this.angle + 90 ) / ( PI / 180 ) + random( -opt.jitterHue, opt.jitterHue ) ) + ', 100%, 70%, ' + ( opt.lightAlpha / 100 ) + ' )';
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sketch.beginPath();
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sketch.moveTo( 0, 0 );
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sketch.lineTo( this.x, this.y );
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sketch.stroke();
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};
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};
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var createOrb = function( config ){
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var x = ( config && config.x ) ? config.x : sketch.mouse.x,
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y = ( config && config.y ) ? config.y : sketch.mouse.y;
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orbs.push( new Orb( x, y ) );
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};
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var turnOnMove = function(){
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sketch.mousemove = createOrb;
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};
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var turnOffMove = function(){
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sketch.mousemove = null;
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};
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sketch.mousedown = function(){
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createOrb();
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turnOnMove();
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};
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sketch.mouseup = turnOffMove;
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sketch.resize = function(){
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center.x = sketch.width / 2;
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center.y = sketch.height / 2;
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sketch.lineCap = 'round';
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};
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sketch.setup = function(){
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while( opt.count-- ){
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createOrb( {
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x: random( sketch.width / 2 - 300, sketch.width / 2 + 300 ),
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y: random( sketch.height / 2 - 300, sketch.height / 2 + 300 )
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} );
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};
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};
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sketch.clear = function(){
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sketch.globalCompositeOperation = 'destination-out';
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sketch.fillStyle = 'rgba( 0, 0, 0 , ' + ( opt.clearAlpha / 100 ) + ' )';
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sketch.fillRect( 0, 0, sketch.width, sketch.height );
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sketch.globalCompositeOperation = 'lighter';
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};
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sketch.update = function(){
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dt = ( sketch.dt < 0.1 ) ? 0.1 : sketch.dt / 16;
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dt = ( dt > 5 ) ? 5 : dt;
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var i = orbs.length;
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opt.total = i;
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while( i-- ){
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orbs[i].update();
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}
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};
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sketch.draw = function(){
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sketch.save();
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sketch.translate( center.x, center.y );
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sketch.scale( opt.scale, opt.scale );
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var i = orbs.length;
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while( i-- ){
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orbs[i].render();
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}
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sketch.restore();
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};
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gui = new dat.GUI( { autoPlace: false } )
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gui.add( opt, 'total' ).name( 'Total Orbitals' ).listen();
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gui.add( opt, 'speed' ).min( -300 ).max( 300 ).step( 1 ).name( 'Speed' );
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gui.add( opt, 'scale' ).min( 0.5 ).max( 5 ).step( 0.001 ).name( 'Scale' );
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gui.add( opt, 'jitterRadius' ).min( 0 ).max( 5 ).step( 0.001 ).name( 'Radius Jitter' );
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gui.add( opt, 'jitterHue' ).min( 0 ).max( 90 ).step( 1 ).name( 'Hue Jitter' );
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gui.add( opt, 'clearAlpha' ).min( 0 ).max( 100 ).step( 1 ).name( 'Clear Alpha' );
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gui.add( opt, 'toggleOrbitals' ).name( 'Toggle Orbitals' )
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gui.add( opt, 'orbitalAlpha' ).min( 0 ).max( 100 ).step( 1 ).name( 'Orbital Alpha' );
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gui.add( opt, 'toggleLight' ).name( 'Toggle Light' );
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gui.add( opt, 'lightAlpha' ).min( 0 ).max( 100 ).step( 1 ).name( 'Light Alpha' );
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gui.add( opt, 'clear' ).name( 'Clear' );
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customContainer = document.getElementById( 'gui' );
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customContainer.appendChild(gui.domElement);
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document.onselectstart = function(){
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return false;
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};
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