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basicfeatures/distorted-warptunnel-audio-visualizer.markdown

Created April 20, 2024 10:09
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Distorted Warptunnel Audio Visualizer
Raw
distorted-warptunnel-audio-visualizer.markdown
Raw
index.html
<a id="btStartAudioVisualization" class="bt">Start Audio Visualization</a>
<p id="txtStatus"></p>
Raw
script.js
/*
Song: LAKEY INSPIRED - Chill Day (Vlog No Copyright Music) Music provided by Vlog No Copyright Music. Video Link: https://youtu.be/vtHGESuQ22s
*/
//---
var audio, audioContext, audioSrc;
var analyser, analyserBufferLength;
//---
var w;
var h;
var btStart;
var txtStatus;
var canvas;
var context;
var imageData;
var data;
var mouseActive = false;
var mouseDown = false;
var mousePos = { x:0, y:0 };
var mouseFollowSpeed = 0.015;
var fov = 250;
var speed = 0.75;
var particles = [];
var particlesCenter = [];
var time = 0;
var colorInvertValue = 0;
//---
function init() {
canvas = document.createElement( 'canvas' );
canvas.addEventListener( 'mousedown', mouseDownHandler, false );
canvas.addEventListener( 'mouseup', mouseUpHandler, false );
canvas.addEventListener( 'mousemove', mouseMoveHandler, false );
canvas.addEventListener( 'mouseenter', mouseEnterHandler, false );
canvas.addEventListener( 'mouseleave', mouseLeaveHandler, false );
document.body.appendChild( canvas );
context = canvas.getContext( '2d' );
window.addEventListener( 'resize', onResize, false );
onResize();
addParticles();
render();
clearImageData();
render();
context.putImageData( imageData, 0, 0 );
btStart = document.getElementById( 'btStartAudioVisualization' );
btStart.addEventListener( 'mousedown', userStart, false );
txtStatus = document.getElementById( 'txtStatus' );
txtStatus.innerHTML = 'Waiting Patiently For You... Please Click the Start Button.';
};
//---
function userStart() {
btStart.removeEventListener( 'mousedown', userStart );
btStart.addEventListener( 'mousedown', audioBtHandler, false );
btStart.innerHTML = 'Pause Audio';
txtStatus.innerHTML = 'Loading Audio...';
audioSetup();
animate();
};
//---
function audioSetup() {
audio = new Audio();
audio.src = 'http://nkunited.de/ExternalImages/jsfiddle/audio/ChillDay_comp.mp3';
audio.controls = false;
audio.loop = true;
audio.autoplay = true;
audio.crossOrigin = 'anonymous';
audio.addEventListener( 'canplaythrough', audioLoaded, false );
audioContext = new ( window.AudioContext || window.webkitAudioContext )();
analyser = audioContext.createAnalyser();
analyser.connect( audioContext.destination );
analyser.smoothingTimeConstant = 0.65;
analyser.fftSize = 512 * 32;//circleSegments * 32;
analyserBufferLength = analyser.frequencyBinCount;
audioSrc = audioContext.createMediaElementSource( audio );
audioSrc.connect( analyser );
};
function audioLoaded( event ) {
txtStatus.innerHTML = 'Song: LAKEY INSPIRED - Chill Day';
//txtStatus.style.display = 'none';
};
//---
function clearImageData() {
for ( var i = 0, l = data.length; i < l; i += 4 ) {
data[ i ] = 0;
data[ i + 1 ] = 0;
data[ i + 2 ] = 0;
data[ i + 3 ] = 255;
}
};
function setPixel( x, y, r, g, b, a ) {
var i = ( x + y * imageData.width ) * 4;
data[ i ] = r;
data[ i + 1 ] = g;
data[ i + 2 ] = b;
data[ i + 3 ] = a;
};
//---
function drawLine( x1, y1, x2, y2, r, g, b, a ) {
var dx = Math.abs( x2 - x1 );
var dy = Math.abs( y2 - y1 );
var sx = ( x1 < x2 ) ? 1 : -1;
var sy = ( y1 < y2 ) ? 1 : -1;
var err = dx - dy;
var lx = x1;
var ly = y1;
while ( true ) {
if ( lx > 0 && lx < w && ly > 0 && ly < h ) {
setPixel( lx, ly, r, g, b, a );
}
if ( ( lx === x2 ) && ( ly === y2 ) )
break;
var e2 = 2 * err;
if ( e2 > -dx ) {
err -= dy;
lx += sx;
}
if ( e2 < dy ) {
err += dx;
ly += sy;
}
}
};
//---
function getCirclePosition( centerX, centerY, radius, index, segments ) {
var angle = index * ( ( Math.PI * 2 ) / segments ) + time;
var x = centerX + Math.cos( angle ) * radius;
var y = centerY + Math.sin( angle ) * radius;
return { x:x, y:y };
};
function drawCircle( centerPosition, radius, segments ) {
var coordinates = [];
var radiusSave;
var diff = 0;//Math.floor( Math.random() * segments );
for ( var i = 0; i <= segments; i++ ) {
//var radiusRandom = radius + Math.random() * ( radius / 8 );
//var radiusRandom = radius + Math.random() * ( radius / 32 );
var radiusRandom = radius;// + ( radius / 8 );
if ( i === 0 ) {
radiusSave = radiusRandom;
}
if ( i === segments ) {
radiusRandom = radiusSave;
}
var centerX = centerPosition.x;
var centerY = centerPosition.y;
var position = getCirclePosition( centerX, centerY, radiusRandom, i, segments );
coordinates.push( { x:position.x, y:position.y, index:i + diff, radius:radiusRandom, segments:segments, centerX:centerX, centerY:centerY } );
}
return coordinates;
};
//---
function addParticle( x, y, z, audioBufferIndex ) {
var particle = {};
particle.x = x;
particle.y = y;
particle.z = z;
particle.x2d = 0;
particle.y2d = 0;
particle.audioBufferIndex = audioBufferIndex;
return particle;
};
function addParticles() {
var audioBufferIndexMin = 8;
var audioBufferIndexMax = 1024;
var audioBufferIndex = audioBufferIndexMin;
var centerPosition = { x:0, y:0 };
var center = { x:0, y:0 };
var c = 0;
var w1 = Math.random() * ( w / 1 );
var h1 = Math.random() * ( h / 1 );
for ( var z = -fov; z < fov; z += 4 ) {
var coordinates = drawCircle( centerPosition, 75, 64 );
var particlesRow = [];
center.x = ( ( w / 2 ) - w1 ) * ( c / 15 ) + w / 2;
center.y = ( ( h / 2 ) - h1 ) * ( c / 15 ) + w / 2;
c++;
//var center = { x:w / 2, y:h / 2 };
particlesCenter.push( center );
audioBufferIndex = Math.floor( Math.random() * audioBufferIndexMax ) + audioBufferIndexMin;
for ( var i = 0, l = coordinates.length; i < l; i++ ) {
var coordinate = coordinates[ i ];
var particle = addParticle( coordinate.x, coordinate.y, z, audioBufferIndex );
particle.index = coordinate.index;
particle.radius = coordinate.radius;
particle.radiusAudio = particle.radius;
particle.segments = coordinate.segments;
particle.centerX = coordinate.centerX;
particle.centerY = coordinate.centerY;
particlesRow.push( particle );
if ( i < coordinates.length / 2 ) {
audioBufferIndex++;
} else {
audioBufferIndex--;
}
if ( audioBufferIndex > audioBufferIndexMax ) {
audioBufferIndex = audioBufferIndexMin;
}
if ( audioBufferIndex < audioBufferIndexMin ) {
audioBufferIndex = audioBufferIndexMax;
}
/*
if ( i < audioBufferIndexMax / 2 ) {
//if ( i < Math.random() * audioBufferIndexMax ) {
audioBufferIndex++;
} else {
audioBufferIndex--;
}
*/
/*
audioBufferIndex++;
//if ( audioBufferIndex > Math.random() * audioBufferIndexMax ) {
if ( audioBufferIndex > audioBufferIndexMax ) {
audioBufferIndex = audioBufferIndexMin;
}
*/
//audioBufferIndex = Math.floor( Math.random() * audioBufferIndexMax ) + audioBufferIndexMin;
}
particles.push( particlesRow );
}
};
//---
function onResize(){
w = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
h = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
canvas.width = w;
canvas.height = h;
context.fillStyle = '#000000';
context.fillRect( 0, 0, w, h );
imageData = context.getImageData( 0, 0, w, h );
data = imageData.data;
};
//---
function audioBtHandler( event ) {
if ( audio.paused ) {
audio.play();
btStart.innerHTML = 'Pause Audio';
} else {
audio.pause();
btStart.innerHTML = 'Play Audio';
}
};
//---
function mouseDownHandler( event ) {
mouseDown = true;
};
function mouseUpHandler( event ) {
mouseDown = false;
};
function mouseEnterHandler( event ) {
mouseActive = true;
};
function mouseLeaveHandler( event ) {
mouseActive = false;
mousePos.x = w / 2;
mousePos.y = h / 2;
mouseDown = false;
};
function mouseMoveHandler( event ) {
mousePos = getMousePos( canvas, event );
};
function getMousePos( canvas, event ) {
var rect = canvas.getBoundingClientRect();
return { x:event.clientX - rect.left, y:event.clientY - rect.top };
};
//---
function render() {
var frequencySource;
if ( analyser ) {
frequencySource = new Uint8Array( analyser.frequencyBinCount );
analyser.getByteFrequencyData( frequencySource );
}
//---
var sortArray = false;
//---
for ( var i = 0, l = particles.length; i < l; i++ ) {
var particlesRow = particles[ i ];
var particlesRowBack;
if ( i > 0 ) {
particlesRowBack = particles[ i - 1 ];
}
//---
var center = particlesCenter[ i ];
if ( mouseActive ) {
//center.x = ( ( w / 2 ) - mousePos.x ) * ( -i / 150 ) + w / 2;
//center.y = ( ( h / 2 ) - mousePos.y ) * ( -i / 150 ) + h / 2;
center.x = ( ( w / 2 ) - mousePos.x ) * ( ( particlesRow[ 0 ].z - fov ) / 500 ) + w / 2;
center.y = ( ( h / 2 ) - mousePos.y ) * ( ( particlesRow[ 0 ].z - fov ) / 500 ) + h / 2;
} else {
center.x += ( ( w / 2 ) - center.x ) * mouseFollowSpeed;
center.y += ( ( h / 2 ) - center.y ) * mouseFollowSpeed;
}
//---
for ( var j = 0, k = particlesRow.length; j < k; j++ ) {
var particle = particlesRow[ j ];
var scale = fov / ( fov + particle.z );
particle.x2d = ( particle.x * scale ) + center.x;
particle.y2d = ( particle.y * scale ) + center.y;
//---
if ( analyser ) {
var frequency = frequencySource[ particle.audioBufferIndex ];
var frequencyAdd = frequency / 8;
particle.radiusAudio = particle.radius + frequencyAdd;
} else {
particle.radiusAudio = particle.radius;// + Math.random() * 4;
}
//---
if ( mouseDown ) {
particle.z += speed;
if ( particle.z > fov ) {
particle.z -= ( fov * 2 );
sortArray = true;
}
} else {
particle.z -= speed;
if ( particle.z < -fov ) {
particle.z += ( fov * 2 );
sortArray = true;
}
}
//---
var lineColorValue = 0;
if ( j > 0 ) {
var p = particlesRow[ j - 1 ];
//var lineColorValue = Math.round( ( ( i - ( fov / 5 ) ) / l ) * 255 );
lineColorValue = Math.round( i / l * 200 );//255
/*
if ( analyser ) {
lineColorValue = Math.round( i / l * ( 200 + frequency ));//255
if ( lineColorValue > 255 ) {
lineColorValue = 255;
}
}
*/
drawLine( particle.x2d | 0, particle.y2d | 0, p.x2d | 0, p.y2d | 0, 0, Math.round( lineColorValue / 2 ), lineColorValue, 255 );
}
var position;
if ( j < k - 1 ) {
position = getCirclePosition( particle.centerX, particle.centerY, particle.radiusAudio, particle.index, particle.segments );
} else {
var p1 = particlesRow[ 0 ];
position = getCirclePosition( p1.centerX, p1.centerY, p1.radiusAudio, p1.index, p1.segments );
}
particle.x = position.x;
particle.y = position.y;
//---
if ( i > 0 && i < l - 1 ) {
var pB;// = particlesRowBack[ j ];
if ( j === 0 ) {
pB = particlesRowBack[ particlesRowBack.length - 1 ];
} else {
pB = particlesRowBack[ j - 1 ];
}
drawLine( particle.x2d | 0, particle.y2d | 0, pB.x2d | 0, pB.y2d | 0, 0, Math.round( lineColorValue / 2 ), lineColorValue, 255 );
}
}
}
//---
if ( sortArray ) {
particles = particles.sort( function( a, b ) {
return ( b[ 0 ].z - a[ 0 ].z );
} );
}
//---
if ( mouseDown ) {
time -= 0.005;
} else {
time += 0.005;
}
//---
//soft invert colors
if ( mouseDown ) {
if ( colorInvertValue < 255 )
colorInvertValue += 5;
else
colorInvertValue = 255;
softInvert( colorInvertValue );
} else {
if ( colorInvertValue > 0 )
colorInvertValue -= 5;
else
colorInvertValue = 0;
if ( colorInvertValue > 0 )
softInvert( colorInvertValue );
}
};
//---
function softInvert( value ) {
for ( var j = 0, n = data.length; j < n; j += 4 ) {
data[ j ] = Math.abs( value - data[ j ] ); // red
data[ j + 1 ] = Math.abs( value - data[ j + 1 ] ); // green
data[ j + 2 ] = Math.abs( value - data[ j + 2 ] ); // blue
data[ j + 3 ] = 255;// - data[ j + 3 ]; // alpha
}
};
//---
function animate() {
clearImageData();
render();
context.putImageData( imageData, 0, 0 );
requestAnimationFrame( animate );
};
window.requestAnimFrame = ( function() {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function( callback ) {
window.setTimeout( callback, 1000 / 60 );
};
} )();
//---
init();
Raw
style.css
html, body, div {
margin: 0;
padding: 0;
border: 0;
}
body {
overflow: hidden;
background-color:#000;
}
.bt {
-moz-box-shadow:inset 0px 1px 0px 0px #54a3f7;
-webkit-box-shadow:inset 0px 1px 0px 0px #54a3f7;
box-shadow:inset 0px 1px 0px 0px #54a3f7;
background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #007dc1), color-stop(1, #0061a7));
background:-moz-linear-gradient(top, #007dc1 5%, #0061a7 100%);
background:-webkit-linear-gradient(top, #007dc1 5%, #0061a7 100%);
background:-o-linear-gradient(top, #007dc1 5%, #0061a7 100%);
background:-ms-linear-gradient(top, #007dc1 5%, #0061a7 100%);
background:linear-gradient(to bottom, #007dc1 5%, #0061a7 100%);
background-color:#007dc1;
-moz-border-radius:3px;
-webkit-border-radius:3px;
border-radius:3px;
border:1px solid #124d77;
display:inline-block;
cursor:pointer;
color:#ffffff;
font-family:Arial;
font-size:13px;
padding:6px 24px;
text-decoration:none;
text-shadow:0px 1px 0px #154682;
}
.bt:hover {
background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #0061a7), color-stop(1, #007dc1));
background:-moz-linear-gradient(top, #0061a7 5%, #007dc1 100%);
background:-webkit-linear-gradient(top, #0061a7 5%, #007dc1 100%);
background:-o-linear-gradient(top, #0061a7 5%, #007dc1 100%);
background:-ms-linear-gradient(top, #0061a7 5%, #007dc1 100%);
background:linear-gradient(to bottom, #0061a7 5%, #007dc1 100%);
background-color:#0061a7;
}
.bt:active {
position:relative;
top:1px;
}
#btStartAudioVisualization {
position: absolute;
top: 10px;
left: 10px;
}
#txtStatus {
position: absolute;
bottom: 0px;
left: 10px;
font-family: "Arial", serif;
font-size: 12px;
color: rgb(255,255,255);
}
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