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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>CS 4621: Final Project -- Music Visualizer</title>
<!-- Bootstrap -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<script language="javascript" type="text/javascript" src="js/jquery-3.1.1.min.js"></script>
<script language="javascript" type="text/javascript" src="js/gl-matrix-min.js"></script>
<script language="javascript" type="text/javascript" src="js/boilerplate.js"></script>
<style>
body {
background-color: white;
color: black;
font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
button {
color: black;
background-color: white;
display: block;
margin-top: 10px;
padding-left: 18px; padding-right: 18px;
border: none;
}
#play-bar {
display: black;
margin-left: auto; margin-right: auto;
margin-bottom: 25px;
width: 50%;
}
select{
float: right;
color: black;
background-color: white;
font-weight: 500;
width: 65%;
}
.flex{
width: 100%;
height: 85vh;
display: inline-flex;
justify-content: center;
align-items: center;
}
.controls div{
margin-bottom: 5px;
}
.controls p {
margin: 10px auto;
}
audio{
width: 87%;
display: block;
margin: 0 auto;
/*margin-top: 30px;*/
}
.title-main{
float: right;
font-weight: 700;
font-size: 16px;
padding: 12px;
}
.title-main span{
font-weight: 400;
font-size: 12px;
}
.title-control{
font-size: 16px;
font-weight: 700;
text-align: center;
margin-bottom: 20px;
}
.canvas{
display: block;
width: 65%;
height: 85%;
}
.sliders{
margin: 0 auto;
display: block;
width: 100%;
}
.sliders input[type=range]{
width: 62%;
}
.controls{
background-color: #FAFAFA;
border: 1px solid #DDDDDD;
padding: 15px;
width: 20%;
height: 85%;
margin-left: 2%;
}
input[type=range] {
-webkit-appearance: none;
margin: 10px 0;
float: right;
}
select:focus {
outline: none;
}
input[type=range]:focus {
outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
width: 100%;
height: 2px;
cursor: pointer;
animate: 0.2s;
box-shadow: 0px 0px 0px #000000;
background: #5A5A5A;
border-radius: 1px;
border: 0px solid #000000;
}
input[type=range]::-webkit-slider-thumb {
box-shadow: 0px 0px 0px #000000;
height: 12px;
width: 12px;
border-radius: 25px;
background: #2E84FC;
cursor: pointer;
-webkit-appearance: none;
margin-top: -5px;
}
input[type=range]:focus::-webkit-slider-runnable-track {
background: #2E84FC;
}
audio::-internal-media-controls-download-button {
display:none;
}
audio::-webkit-media-controls-enclosure {
overflow:hidden;
}
audio::-webkit-media-controls-panel {
width: calc(100% + 30px); /* Adjust as needed */
}
.btn {
background-color:#2E84FC;
color: white;
width: 100%;
}
.btn:hover { color: white; }
</style>
</head>
<body>
<p class="title-main">Cool Visualization</p>
<div class="flex">
<canvas tabindex="1" id="webglCanvas" style="border: none; background-color: black;" width="1000" height="600" class="canvas"></canvas>
<div class="controls">
<p class='title-control'>Control Panel</p>
<!-- sliders -->
<div class="sliders">
<label for="accel">Gravity</label>
<input type="range" class="js-acceleration" min="0" value="13" max="26"/><br>
<label for="velocity">Velocity</label>
<input type="range" class="js-velocity" min="0" value="5" max="10"/><br>
<label for="rotation">Rotation*</label>
<input type="range" class="js-rotationSpeed" min="-6" value="0" max="6"/><br>
</div>
<p>*Click and drag the canvas to rotate at your own speed.</p>
<!-- Song -->
<div>
<label for="song">Song*:</label>
<select name="songs" id="js-songs" class="song-select">
<option value="" disabled="disabled">Acoustic ------------------</option>
<option data-bpm="120" value="https://soundcloud.com/kevinrianto/radwimps-nandemonaiya">Your Name</option>
<option data-bpm="122" value="https://soundcloud.com/qwertyastrid/michigan">Michigan</option>
<option value="" disabled="disabled"></option>
<option value="" disabled="disabled">Soundtrack ----------------</option>
<option data-bpm="91.972" value="https://soundcloud.com/zarsh-elsawaf/inception-mind-heist-movie">Inception</option>
<option value="" disabled="disabled"></option>
<option value="" disabled="disabled">Ambient -------------------</option>
<option data-bpm="112.4" value="https://soundcloud.com/this-will-destroy-you/a-three-legged-workhorse">A Three-Legged Workhorse</option>
<option value="" disabled="disabled"></option>
<option value="" disabled="disabled">Lo-fi -----------------------</option>
<option data-bpm="160.1" value="https://soundcloud.com/verzache/conscious">Conscious</option>
<option data-bpm="158" value="https://soundcloud.com/lidogotsongs/feel-it-still-lido-remix">Feel it Still</option>
<option data-bpm="117.0" value="https://soundcloud.com/itndylan/lemons-dylan">Lemons</option>
<option value="" disabled="disabled"></option>
<option value="" disabled="disabled">Hip-Hop -------------------</option>
<option data-bpm="69.6" value="https://soundcloud.com/travisscott-2/11-grey">Grey</option>
<option data-bpm="100" value="https://soundcloud.com/santandave/wanna-know-remix-feat-drake">Wanna Know</option>
<option data-bpm="155" value="https://soundcloud.com/liluzivert/15-xo-tour-llif3">XO TOUR Lif3</option>
<option value="" disabled="disabled"></option>
<option value="" disabled="disabled">R&B -----------------------</option>
<option data-bpm="117" value="https://soundcloud.com/partyomo/partynextdoor-break-from">Break From Toronto</option>
<option data-bpm="120" style="display:none" selected>User Input</option>
</select>
</div>
<p>*To use your own song, copy the entire url from the page of a soundcloud song, and paste it after the '#' in the url of the visualization.</p>
<!-- Theme -->
<div>
<label for="color">Theme:</label>
<select name="colors" id="js-colors">
<option value="1">Deep Sea</option>
<option value="3">Scandenavian</option>
<option value="2">Sunset</option>
</select>
</div>
<!-- Option -->
<div>
<label for="">Mode:</label>
<select name="" id="js-visID" class="song-select">
<option value="cool3">Central</option>
<option value="cool2">Sweep</option>
<option value="cool1">Frequency</option>
</select>
</div>
<button class="js-fullscreen btn">Full Screen Mode</button>
</div>
</div>
</div>
<script src="js/bundle.js" charset="utf-8"></script>
<script src="js/perlin.js" charset="utf-8"></script>
<script id="vertexShader--basic" type="x-shader/x-vertex">
attribute vec3 position;
uniform mat4 projection;
uniform mat4 toWorld;
uniform mat4 toCam;
void main() {
gl_Position = projection * toCam * toWorld * vec4(position, 1.0);
}
</script>
<script id="fragmentShader--basic" type="x-shader/x-fragment">
precision highp float;
uniform bool waveform;
uniform bool spectrum;
uniform int theme;
vec4 aqua = vec4(0.0, 207.0, 202.0, 255.0) / 255.0;
vec4 white = vec4(1.0);
vec4 purp = vec4(59.0, 38.0, 130.0, 255.0) / 255.0;
vec4 grey = vec4(230.,230.,230.,255.)/255.;
// scandenavian cube colors
vec4 scand_red = vec4(245.0, 88.0, 109.0, 255.0 ) / 255.0;
vec4 scand_black = vec4(152., 152., 152., 255.)/255.0;
void main() {
vec4 color1;
vec4 color2;
if (theme == 1) {
color1 = aqua;
color2 = white;
} else if (theme == 2) {
color1 = grey;
color2 = white;
} else {
color1 = scand_red;
color2 = scand_black;
}
if (waveform || spectrum) {
gl_FragColor = color1;
} else {
gl_FragColor = color2;
}
}
</script>
<script id="vertexShader--background" type="x-shader/x-vertex">
attribute vec3 vert_position;
uniform mat4 projection;
varying vec3 position;
void main() {
gl_Position = vec4(vert_position, 1.0);
position = vert_position;
}
</script>
<script id="fragmentShader--background" type="x-shader/x-fragment">
precision highp float;
uniform float time;
uniform float bpm;
uniform int theme;
uniform vec2 resolution;
varying vec3 position;
// COLORS ~~
// scandanavian interior
vec4 scand1 = vec4(.918, .925, .926, 1.0);
vec4 scand2 = vec4(1.0, .989, .989, 1.0);
// sunrise
vec4 sun1 = vec4(254.0, 156.0, 136.0, 255.0)/255.0;
vec4 sun2 = vec4(245.0, 217.0, 97.0, 255.0)/255.0;
// deep sea
vec4 deep2 = vec4(20.0, 30.0, 48.0, 255.0)/255.0;
vec4 deep1 = vec4(36.0, 59.0, 85.0, 255.0)/255.0;
vec4 pink = vec4(1.0, 0.27, 0.73, 1.0);
vec4 white = vec4(1.0);
vec4 blue = vec4(.2, .2, 1., 1.);
vec4 litepink = vec4(255.0, 182.0, 193.0, 255.0) / 255.0;
void main() {
float radius = 3.5;
float width = 0.4;
float hardness = 0.1;
float speed = 1.0;
float pi = 3.14159265359;
float bpms = bpm / 60000.0; // beats per ms
vec4 color1;
vec4 color2;
if (theme == 1) {
color1 = deep1;
color2 = deep2;
} else if (theme == 2) {
color1 = sun1;
color2 = sun2;
} else {
color1 = scand1;
color2 = scand2;
}
//float r = radius + width * cos( time * bpms * pi ); // To change pulses per minute, multiply/divide inside sin()
float r = radius + width * abs( cos( time * bpms * (pi/2.0) + (pi/2.0) + 0.2 ));
// adjust by 5/3 to make circular
vec2 pos = 2.5 * position.xy * resolution / min(resolution.x, resolution.y);
float t = max(0.0, hardness * ((r * r) - (pos.x * pos.x) - (pos.y * pos.y)));
//float t = max(0.0, hardness * ((r * r) - (25.0 * position.x * position.x) - (9.0 * position.y * position.y)));
t = min(t, 1.0);
gl_FragColor = (1.0 - t) * color1 + t * color2;
}
</script>
<script>
$('.js-fullscreen').on('click', function(){
var el = document.getElementById('webglCanvas');
if(el.webkitRequestFullScreen) { el.webkitRequestFullScreen();}
else { el.mozRequestFullScreen(); }
});
$(document).on("webkitfullscreenchange mozfullscreenchange fullscreenchange", function( event ) {
var isFullScreen = document.fullScreen ||
document.mozFullScreen ||
document.webkitIsFullScreen;
if ( isFullScreen ) {
var c = $('#webglCanvas');
c.css('height','100%');
c.css('width', '100%');
} else {
var c = $('#webglCanvas');
c.css('height','85%');
c.css('width', '65%');
}
});
$(window).on("resize", function(event) {
// Update PerspectiveMatrix
perspectiveMatrix = createPerspectiveMatrix();
camera.projection = perspectiveMatrix;
});
var canPlay = false;
var analyser;
var waveArray;
var freqArray;
var bufferLength;
function getSongFromURL() {
var hash = window.location.hash;
return hash.substring(1);
}
$('#js-songs').on('change', function(){
if(window.location.hash != ""){
var cur = window.location.href;
var id = cur.indexOf('#');
var cur = cur.substring(0,id);
} else {
var cur = window.location.href;
}
var url = this.value;
var newURL = cur+"#"+url;
window.location.href = newURL;
location.reload();
})
$('#js-visID').on('change', function(){
switch(this.value){
case "cool1":
break;
case "cool2":
break;
case "cool3":
break;
}
});
// Scene Objects ---------------------------------------------------
// create particle object centered at [x], [y], [z] with scale [s]
function createParticle(x, y, z, s, c) {
var particle = {};
// Instantiate particle
particle.position = [x, y, z];
particle.yVelocity = 0;
particle.acceleration = 0;
particle.scale = [s, s, s];
particle.waveform = false;
particle.spectrum = false;
particle.decay = false;
// Create [particle.toWorld] matrix
updateToWorldMatrix(particle);
return particle;
}
/*
* create 2D sheet of particles with properties:
* - [numX]
* - [numZ]
* - [minX]
* - [maxX]
* - [minZ]
* - [maxZ]
*/
function createParticleSheet(numX, numZ, minX, maxX, minZ, maxZ) {
var width = maxX - minX;
var height = maxZ - minZ;
var particles = {};
particles.list = [];
particles.position = [0, 0, 0];
particles.scale = [1, 1, 1];
for (var i = 0; i < numX; i++) {
particles.list[i] = [];
for (var j = 0; j < numZ; j++) {
// Create particle
var x = ((i / (numX-1)) * width) + minX;
var z = ((j / (numZ-1)) * height) + minZ;
var color = [Math.abs(x), Math.abs(z), Math.abs((x + z) / 2)];
particles.list[i][j] = createParticle(x, 0, z, 0.01, color);
}
}
// Create [particles.toWorld]
updateToWorldMatrix(particles);
return particles;
}
/**
* Offset the particle to [value]
* [particle] is offset along the y axis
*/
function moveParticle(particle, value) {
particle.position[1] = value;
updateToWorldMatrix(particle);
}
/**
* Update particle position & velocity based on acceleration, dt, minV
*/
function moveParticleByPhysics(particle, dt, minV) {
var dy = (particle.yVelocity * dt);
var y = particle.position[1] + dy;
if (y < minV) {
y = minV;
particle.decay = false;
}
moveParticle(particle, y, 1.0);
// Update Velocity
var dv = particle.acceleration * dt;
particle.yVelocity += dv;
}
function setParticleDecay(particle, waveformSound, decayAcceleration, velocity) {
particle.decay = true;
particle.yVelocity = velocity * waveformSound;
particle.acceleration = -decayAcceleration;
}
/**
* create the scene for our visualization
* the [scene] object has the following fields:
* - [camera]
* - [particles]
* - [shape]: shape for each particle
*/
function createScene(camera, particles, shape) {
var scene = {
camera: camera,
particles: particles,
shape: shape
};
return scene;
}
/**
* draw all the objects in the scene
* [scene] has the following properties:
* - [particles]
* - [list]
* - [toWorld]
* - [camera]
* - [toWorld]
* - [projection]
*/
function drawScene(gl, scene, theme) {
// Draw each particle
for (var i = 0; i < particles.list.length; i++) {
for (var j = 0; j < particles.list[i].length; j++) {
var particle = particles.list[i][j];
var toWorld = mat4.create();
mat4.mul(toWorld, particles.toWorld, particle.toWorld);
drawShape(gl, scene.shape, camera, toWorld, [particle.waveform, particle.spectrum], theme);
}
}
}
/**
* [waveformVal] range: [-1, 1]
*/
function getWaveformSound(center, amp, scale, waveformVal, j) {
// Update waveformVal if particle is in the waveform range
//var half = scene.particles.list[i].length / 4.0;
var val = amp * Math.abs(waveformVal);
if (center-val < j && j < center+val) {
var r = scale * val / amp;
var x = scale * ( Math.abs(j - center) ) / amp;
var y = Math.sqrt(Math.pow(r, 2) - Math.pow(x, 2));
waveformVal = y;
} else {
waveformVal = 0;
}
// Waveform
var waveformSound = waveformVal;
return waveformSound;
}
function normalizeWaveformVal(waveformVal) {
return ( waveformVal - (255.0/2.0) ) / (255.0/2.0); // range: [-1, 1];
}
function normalizeSpectrumVal(spectrumVal) {
return spectrumVal / 255.0; // range: [0, 1]
}
/*
* Particles Sweep laterally along the waveform
*/
function getSoundValueSweep(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm) {
// No spectrum for this vis
particle.spectrum = false;
// Waveform 1 ---------------------------------------------------------
var center1 = l / 4.0;
var amp1 = l / 4.0;
var scale1 = 3;
var waveformSound1 = getWaveformSound(center1, amp1, scale1, waveformVal, j);
// Waveform 2 ---------------------------------------------------------
//var sin = Math.abs( Math.sin( (time / 1000.0) ) );
var max = 4;
var sin = beats % (2.0*max);
if (sin >= max) {
sin = 2.0*max - sin;
}
sin = sin / max;
var curI = Math.round( l * sin );
//var sin = Math.cos( time * bpms * Math.PI / 2.0 / 2.0);
//var curI = Math.round( l/2.0 + (l/2.0*sin) );
var center2 = l * 3.0/4.0;
var amp2 = l / 4.0;
var scale2 = 2;
var waveformSound2 = getWaveformSound(center2, amp2, scale2, maxWaveformVal, j);
var intWaveSound2 = Math.round(waveformSound2);
if ( !(curI-intWaveSound2-1 < i && i < curI+intWaveSound2+1) ) {
waveformSound2 = 0;
} else if (waveformSound2 != 0) {
setParticleDecay(particle, waveformSound2, decayAcceleration, decaySpeed);
}
// Update particle.waveform
if (waveformSound1 != 0) {
particle.waveform = true;
} else {
particle.waveform = false;
}
// Sound
return vSound = scale * (waveformSound2);
}
/*
* Particles over waveform in center
*/
function getSoundValueCenter(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm) {
// No spectrum for this vis
particle.spectrum = false;
// Waveform 1 ---------------------------------------------------------
var center1 = l / 2.0;
var amp1 = l / 2.0;
var scale1 = 3;
var waveformSound1 = getWaveformSound(center1, amp1, scale1, waveformVal, j);
if (waveformSound1 != 0) {
setParticleDecay(particle, waveformSound1, decayAcceleration, decaySpeed);
}
// Update particle.waveform
if (waveformSound1 != 0) {
particle.waveform = true;
} else {
particle.waveform = false;
}
// Sound
return vSound = scale * (waveformSound1);
}
/*
* Frequency
*/
function getSoundValueFrequency(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm) {
// Waveform 1 ---------------------------------------------------------
var center1 = l * 3.0/4.0;
var amp1 = l / 4.0;
var scale1 = 3;
var waveformSound1 = getWaveformSound(center1, amp1, scale1, waveformVal, j);
// Update particle.waveform
if (waveformSound1 != 0) {
particle.waveform = true;
setParticleDecay(particle, waveformSound1, decayAcceleration, decaySpeed);
} else {
particle.waveform = false;
}
// Spectrum (Frequency)
var thresholdSpectrum = 0.0;
var spectrumSound = 0;
var maxSpectrumJ = l * 2.0/5.0;
var spectrumIdx = Math.round(spectrumVal * maxSpectrumJ);
if (j == spectrumIdx && spectrumVal != 0) {
spectrumSound = 2.0 * (spectrumVal - thresholdSpectrum);
setParticleDecay(particle, spectrumSound, 2.0*decayAcceleration, decaySpeed);
spectrumSound = 0;
particle.spectrum = true;
} else {
spectrumSound = 0;
particle.spectrum = false;
}
// Sound
return vSound = scale * (spectrumSound + waveformSound1);
}
/*
* Sweeping - Default baseline
*/
function getSoundValue(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm) {
// Waveform 1 ---------------------------------------------------------
var center1 = l / 4.0;
var amp1 = l / 4.0;
var scale1 = 3;
var waveformSound1 = getWaveformSound(center1, amp1, scale1, waveformVal, j);
// Waveform 2 ---------------------------------------------------------
//var sin = Math.abs( Math.sin( (time / 1000.0) ) );
var max = 4;
var sin = beats % (2.0*max);
if (sin >= max) {
sin = 2.0*max - sin;
}
sin = sin / max;
var curI = Math.round( l * sin );
//var sin = Math.cos( time * bpms * Math.PI / 2.0 / 2.0);
//var curI = Math.round( l/2.0 + (l/2.0*sin) );
var center2 = l * 3.0/4.0;
var amp2 = l / 4.0;
var scale2 = 2;
var waveformSound2 = getWaveformSound(center2, amp2, scale2, maxWaveformVal, j);
var intWaveSound2 = Math.round(waveformSound2);
if ( !(curI-intWaveSound2-1 < i && i < curI+intWaveSound2+1) ) {
waveformSound2 = 0;
} else if (waveformSound2 != 0) {
//var dist = Math.abs(curI - i);
//if (dist > 0) dist--;
//waveformSound2 = waveformSound2 - Math.pow( (dist / intWaveSound2/5), 2);
particle.decay = true;
particle.yVelocity = 0.0015 * scale * waveformSound2;
particle.acceleration = -decayAcceleration;
}
// Update particle.waveform
//if (waveformSound2 != 0 || waveformSound1 != 0) {
if (waveformSound1 != 0) {
particle.waveform = true;
} else {
particle.waveform = false;
}
// Spectrum (Frequency)
var thresholdSpectrum = 0.7;
var spectrumSound = 0;
if (spectrumVal > thresholdSpectrum) {
spectrumSound = spectrumVal - thresholdSpectrum;
//particle.spectrum = true;
} else {
particle.spectrum = false;
}
// Sound
return vSound = scale * (waveformSound2);
}
/**
* update scene according to music data
* [spectrum] - amplitudes across frequency spectrum
* range: [0, 255]
* [waveform] - snapshot of amplitude readings
* range: [-1.0, +1.0]
* [scale] - scale factor for particle offset
*/
var inc = 0;
function updateScene(scene, spectrum, waveform, prevTime, time, bpm, velocity, acceleration, id) {
var dt = time - prevTime;
var soundAmp = 2;
var noiseAmp = 0.3;
var displaced = 0;
var scale = 0.1;
var threshold = 0.0;
var bpms = bpm / 60000;
//var decaySpeed = 0.0005;
//var decaySpeed = 0.05 / bpm;
//var decaySpeed = 0.0005 / bpm;
//var decaySpeed = 0.0015 * scale
var decaySpeed = velocity;
//var decayAcceleration = 0.0000005;
var decayAcceleration = acceleration;
//var decayAcceleration = 0;
var beats = time * bpms;
var maxWaveformVal = normalizeWaveformVal( Math.max.apply(null, waveform) );
for (var i = 0; i < scene.particles.list.length; i++) {
var waveformVal = normalizeWaveformVal(waveform[i]); // range: [-1, 1];
for (var j = 0; j < scene.particles.list[i].length; j++) {
var particle = scene.particles.list[i][j];
var spectrumVal = spectrum[i]/255.0; // range: [0, 1]
var l = scene.particles.list[i].length;
// Sound
var vSound = 0;
switch (id) {
case "cool1":
vSound = getSoundValueFrequency(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm);
break;
case "cool2":
vSound = getSoundValueSweep(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm);
break;
case "cool3":
vSound = getSoundValueCenter(id, dt, soundAmp, noiseAmp, displaced, scale,
threshold, bpms, decaySpeed, decayAcceleration,
beats, maxWaveformVal, waveformVal, particle,
spectrumVal, l, i, j,
scene, spectrum, waveform, prevTime, time, bpm);
break;
default:
vSound = 0;
break;
}
// Noise
var vNoise = noiseAmp * PerlinNoise.noise((i+inc)/30,(j+inc)/30,.5);
// Final Value
var v = vNoise + soundAmp * (vSound - threshold);
// Move Particles
if (vSound > threshold) {
moveParticle(particle, v);
particle.displacement = 1.0;
displaced++;
if (scale * spectrumVal > threshold) {
} else {
particle.spectrum = false;
}
} else {
if (particle.decay) {
moveParticleByPhysics(particle, dt, vNoise);
} else {
moveParticle(particle, vNoise);
}
particle.displacement = 0.0;
}
}
}
if (displaced >= scene.particles.list.length * scene.particles.list[0].length / 2) { setWire(); }
else { setCube(); }
}
/**
* update [object.toWorld] matrix according to the [object] properties:
* - [position]: array [x, y, z]
* - [scale]: array [sx, sy, sz] or null
*/
function updateToWorldMatrix(object) {
// Create Translation matrix
var [x, y, z] = object.position;
var translation = vec3.fromValues(x,y,z);
var T = mat4.create();
mat4.fromTranslation(T, translation);
// Create Scale Matrix
var S = mat4.create();
if (object.scale != null) {
var [sx, sy, sz] = object.scale;
var scale = vec3.fromValues(sx,sy,sz);
mat4.fromScaling(S, scale);
}
// Update [object.toWorld] matrix
object.toWorld = mat4.create();
mat4.mul(object.toWorld, T, S);
return object;
}
/**
* update [camera.toWorld] matrix and create [camera.toCam] matrix to be the
* inverse of [camera.toWorld]
*/
function updateCamToWorldMatrix(camera) {
// update [camera.toWorld] matrix
updateToWorldMatrix(camera);
// update [camera.toCam] matrix
var toCam = mat4.create();
mat4.invert(toCam, camera.toWorld);
camera.toCam = toCam;
return camera;
}
/**
* update [scene] to move camera around by [offset]
*/
function updateSceneOffset(scene, offset) {
var [x, y, z] = offset;
var v = Math.PI/500;
var Rx = mat4.create();
mat4.fromXRotation(Rx, x*v);
mat4.mul(scene.particles.toWorld, Rx, scene.particles.toWorld);
// Keep rotation around x bound by 180 degrees
var vec = vec3.fromValues(0, 1, 0);
var vecTrans = vec3.create();
vec3.transformMat4(vecTrans, vec, scene.particles.toWorld);
var angle = vec3.angle(vec, vecTrans);
if (angle > Math.PI/2) {
var sign = 1;
if (vecTrans[2] < 0) {
sign = -1;
}
// Stop rotation around x
var RxBack = mat4.create();
mat4.fromXRotation(RxBack, sign * ((Math.PI/2) - angle) );
mat4.mul(scene.particles.toWorld, RxBack, scene.particles.toWorld);
}
var Ry = mat4.create();
mat4.fromYRotation(Ry, y*v);
mat4.mul(scene.particles.toWorld, scene.particles.toWorld, Ry);
var Tz = mat4.create();
var offsetZ = vec3.fromValues(0, 0, z/50);
vec3.add(scene.camera.position, scene.camera.position, offsetZ);
// Check min/max zoom
var min = 0.5;
var max = 15;
if (scene.camera.position[2] < min) {
scene.camera.position[2] = min;
} else if (scene.camera.position[2] > max) {
scene.camera.position[2] = max;
}
updateCamToWorldMatrix(scene.camera);
}
function createPerspectiveMatrix() {
var perspectiveMatrix = mat4.create();
var fovy = (45.0 / 180.0) * Math.PI;
//var aspect = $("#webglCanvas").attr("width") / $("#webglCanvas").attr("height");