Pen Settings

HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

Learn more · Versions

Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

Powered by Algolia
About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

If the stylesheet you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

Learn more · Versions

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

Powered by Algolia
About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

Next Step Leave tour

HTML 

            
              <!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<link rel="stylesheet" type="text/css" href="style.css">
		<script type="text/javascript" src="https://rawgit.com/dataarts/dat.gui/master/build/dat.gui.js"></script>
	</head>
	<body>
		<div id="container"></div>
		<script type="text/javascript" src="https://rawgit.com/mrdoob/three.js/master/build/three.min.js"></script>
		<script id="vertexShader" type="x-shader/x-vertex">
			uniform float time;
			uniform vec2 resolution;
			void main()	{
				gl_Position = vec4( position, 1.0 );
			}
		</script>
		<script id="fragmentShader" type="x-shader/x-fragment">
			// Author:
			// Title:
			
			#ifdef GL_ES
			precision mediump float;
			#endif
			
			#define M_PI 3.1415926535897932384626433832795
			#define M_2PI M_PI * 2.
			#define M_HPI M_PI / 2.
			#define M_E exp(1.)
			
			uniform vec2 u_resolution;
			uniform float u_time;
			
			uniform float u_a_amplitude;
			uniform float u_a_pshift;
			uniform float u_a_period;
			uniform float u_a_vshift;
			uniform float u_a_ratio;
			uniform float u_a_decay;
			uniform float u_a_exponent;
			uniform float u_a_plusx;
			
			uniform float u_a_sine;
			uniform float u_a_square;
			uniform float u_a_sawtooth;
			uniform float u_a_triangle;
			uniform float u_a_pulse;
			uniform float u_a_noise;
			uniform float u_a_dampedSine;
			uniform float u_a_sineIn;
			uniform float u_a_sineOut;
			uniform float u_a_sineInOut;
			uniform float u_a_polyIn;
			uniform float u_a_polyOut;
			uniform float u_a_polyInOut;
			
			uniform float u_o_amplitude;
			uniform float u_o_pshift;
			uniform float u_o_period;
			uniform float u_o_vshift;
			uniform float u_o_ratio;
			uniform float u_o_decay;
			uniform float u_o_exponent;
			uniform float u_o_plusx;
			
			uniform float u_o_sine;
			uniform float u_o_square;
			uniform float u_o_sawtooth;
			uniform float u_o_triangle;
			uniform float u_o_pulse;
			uniform float u_o_noise;
			uniform float u_o_dampedSine;
			uniform float u_o_sineIn;
			uniform float u_o_sineOut;
			uniform float u_o_sineInOut;
			uniform float u_o_polyIn;
			uniform float u_o_polyOut;
			uniform float u_o_polyInOut;
			
			uniform float u_p_pattern_height;
			uniform float u_p_band_height;
			
			float tempo = 15.;
			
			int pattern_n = int(ceil(u_resolution.y / u_p_pattern_height));
			vec2 pattern = vec2((u_p_pattern_height / u_resolution.y) * u_resolution.x, u_p_pattern_height);
			vec2 band = vec2((u_p_band_height / u_resolution.y) * u_resolution.x, u_p_band_height);
			vec2 gap = vec2(((u_p_pattern_height - u_p_band_height) / u_resolution.y * u_resolution.x), (u_p_pattern_height - u_p_band_height));
			
			vec2 pattern_st = pattern / u_resolution;
			vec2 band_st = band / u_resolution;
			vec2 gap_st = gap / u_resolution;
			
			float mv() {
			  float t = 60.0/tempo;
			  return u_time / t;
			}
			
			float rand(float x) {
			   return fract(sin(x)*100000.0);
			}
			
			float sine(float x, float vars[9]) {
			  float amp = vars[0];
			  float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float b = M_2PI / period;
				float c = pshift * M_2PI;
				return amp * sin((x * b) + c) + vshift;
			}
			
			float square(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float b = 1./period;
				return amp * floor(fract((x * b) + pshift) + .5) + vshift;
			}
			
			float sawtooth(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float b = 1./period;
				return amp * fract((x * b) + pshift) + vshift;
			}
			
			float triangle(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float b = 1./period;
				return amp * abs(2.0 * fract((x * b) + pshift) - 1.0) + vshift;
			}
			
			float pulse(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float ratio = vars[4]; // 0 to 1 start at .25
				float b = 1./period;
				return amp * floor(fract((x * b) + pshift) - ratio) + vshift;
			
			}
			
			float noise(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				period = M_2PI / period;
				pshift = pshift * M_2PI;
				float i = floor((x * period) + pshift);
				float f = fract((x * period) + pshift);
				return amp * mix(rand(i), rand(i + 1.0), smoothstep(0.,1.,f)) + vshift;
			}
			
			float dampedSine(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float decay = vars[5];
				period = M_2PI / period;
				pshift = pshift * M_2PI;
			
				return ((amp * pow(M_E, -1.0 * decay * x)) * (cos((period * x) + pshift))) + vshift;
			}
			
			float sineIn(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				period = M_HPI / period;
				pshift = pshift * M_HPI;
				return 1. - (amp * cos(mod((x * period) + pshift, M_HPI)) + vshift);
			}
			
			float sineOut(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				period = M_HPI / period;
				pshift = pshift * M_HPI;
			
				return amp * sin(mod((x * period) + pshift, M_HPI)) + vshift;
			}
			
			float sineInOut(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				period = M_PI / period;
				pshift = pshift * M_PI;
				return (1. - (amp * cos(mod((x * period) + pshift, M_PI)) + vshift))/2.;
			}
			
			float polyIn(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float exponent = vars[6];
				float b = 1./period;
				float inner = fract(x*b + pshift);
			
				return amp * clamp(pow(inner,exponent),0.,1.) + vshift;
			}
			
			float polyOut(float x, float vars[9]) {
				float amp = vars[0];
				float pshift = vars[1];
				float period = vars[2];
				float vshift = vars[3];
				float exponent = vars[6];
				float b = 1./period;
				float inner = fract(x*b + pshift);
			
				return amp * clamp((1. - pow(1.- inner,exponent)),0.,1.) + vshift + amp;
			}
			
			float polyInOut(float x, float vars[9]) {
				float period = vars[2];
				return (mod(x,period) <= period/2.) ? polyIn(x*2., vars) : polyOut(x*2., vars);
			} 
			
			float alpha(float x) {
				float o = 0.;
				float vars[9];
				vars[0] = u_a_amplitude;
				vars[1] = u_a_pshift;
				vars[2] = u_a_period;
				vars[3] = u_a_vshift;
				vars[4] = u_a_ratio;
				vars[5] = u_a_decay;
				vars[6] = u_a_exponent;
				vars[7] = u_a_plusx;
				vars[8] = 0.;
			
				o += sine(x, vars) * u_a_sine;
				o += square(x, vars) * u_a_square;
				o += sawtooth(x, vars) * u_a_sawtooth;
				o += triangle(x, vars) * u_a_triangle;
				o += pulse(x, vars) * u_a_pulse;
				o += noise(x, vars) * u_a_noise;
				o += dampedSine(x, vars) * u_a_dampedSine;
				o += sineIn(x, vars) * u_a_sineIn;
				o += sineOut(x, vars) * u_a_sineOut;
				o += sineInOut(x, vars) * u_a_sineInOut;
				o += polyIn(x, vars) * u_a_polyIn;
				o += polyOut(x, vars) * u_a_polyOut;
				o += polyInOut(x, vars) * u_a_polyInOut;
			
				o += u_a_plusx * x;
			
				return o;
			}
			
			float omega(float x) {
				float o = 0.;
				float vars[9];
				vars[0] = u_o_amplitude;
				vars[1] = u_o_pshift;
				vars[2] = u_o_period;
				vars[3] = u_o_vshift;
				vars[4] = u_o_ratio;
				vars[5] = u_o_decay;
				vars[6] = u_a_exponent;
				vars[7] = u_o_plusx;
				vars[8] = 0.;
			
				o += sine(x, vars) * u_o_sine;
				o += square(x, vars) * u_o_square;
				o += sawtooth(x, vars) * u_o_sawtooth;
				o += triangle(x, vars) * u_o_triangle;
				o += pulse(x, vars) * u_o_pulse;
				o += noise(x, vars) * u_o_noise;
				o += dampedSine(x, vars) * u_o_dampedSine;
				o += sineIn(x, vars) * u_o_sineIn;
				o += sineOut(x, vars) * u_o_sineOut;
				o += sineInOut(x, vars) * u_o_sineInOut;
				o += polyIn(x, vars) * u_o_polyIn;
				o += polyOut(x, vars) * u_o_polyOut;
				o += polyInOut(x, vars) * u_o_polyInOut;
			
				o += u_o_plusx * x;
			
				return o;
			}
			
			
			float delta(vec2 st) {
				float ax = alpha(st.x);
				float ox = omega(st.x);
				float factor = st.y;
				return ax + ((ox - ax) * factor);
			}
			
			float eval(vec2 st) {
				float fx = delta(st);
				float dist = mod((st.y - fx), pattern_st.y);
				return step(dist,band_st.y);
			}
			
			void main() {
				vec2 st = gl_FragCoord.xy/u_resolution.xy;
				st.x *= u_resolution.x/u_resolution.y;
				// st *= 2.0 - 1.0;
			
				vec3 color = vec3(eval(st));
			
				gl_FragColor = vec4(color,1.0);
			}
		</script>
		<script type="text/javascript" src="script.js"></script>
	</body>
</html>
!

CSS 

            
              html,body{
	height:100%;
	padding:0;
	margin:0;
	background: #000000;
}

*{
	box-sizing:border-box;
}

canvas {
	border-width: 10px;
	border-style: solid;
	border-color: #ffffff;
	width: auto;
	height: auto;
}

#container {
	width:100%;
	height:100%;
	display:flex;
	justify-content:center;
	align-items:center;
}
!

JS 

            
              var opts = {
	canvas: {
		width: {val: 1080, min: 100, max: 2000, name: "Width"},
		height:{val: 720, min: 100, max: 2000, name: "Height"},
	},
	alpha: {
		amplitude: {val: .25, min:-4, max:4, name: "Amplitude"},
		pshift: {val: 0.0, min: -4, max: 4, name: "Phase Shift"},
		period: {val: .25, min: 0.001, max: 4, name: "Period"},
		vshift: {val: .5, min: -4, max: 4, name: "Vertical Shift"},
		ratio: {val: .5, min: 0, max: 1, name: "Pulse Ratio"},
		decay: {val: 4, min: 0, max: 10, name: "Damp Decay"},
		exponent: {val: 3, min: 0, max:6, name: "Exponent"},
		plusx: {val: 0, min: -10.0, max: 10, name: "Plus X"},

		type: {val: "sine", name: "Wave Type"}
	},
	omega: {
		amplitude: {val: .25, min:-4, max:4, name: "Amplitude"},
		pshift: {val: 0.0, min: -4, max: 4, name: "Phase Shift"},
		period: {val: .25, min: 0.001, max: 4, name: "Period"},
		vshift: {val: .5, min: -4, max: 4, name: "Vertical Shift"},
		ratio: {val: .5, min: 0, max: 1, name: "Pulse Ratio"},
		decay: {val: 4, min: 0, max: 10, name: "Damp Decay"},
		exponent: {val: 3, min: 0, max:6, name: "Exponent"},
		plusx: {val: 0, min: -10.0, max: 10.0, name: "Plus X"},

		type: {val: "sine", name: "Wave Type"}
	},
	pattern: {
		patternHeight: {val: 50, min: 0, max: 400, name: "pattern Height"},
		bandHeight: {val: 25, min: 0, max: 400, name: "Band Height"}
	}
};

var waveTypes =  [
	"sine",
	"square",
	"sawtooth",
	"triangle",
	"pulse",
	"noise",
	"dampedSine",
	"sineIn",
	"sineOut",
	"sineInOut",
	"polyIn",
	"polyOut",
	"polyInOut",
]

var container;
var camera, scene, renderer;
var uniforms, material, mesh;
var gui, alphaF, omegaF, canvasF, patternF, beatF;

var startTime = Date.now();

init();
animate();

function init() {
	initUniforms();
	initThree();
	initGUI();
}

function initUniforms() {
	uniforms = {
		u_time: { type: "f", value: 1.0 },
		u_resolution: { type: "v2", value: new THREE.Vector2(opts.canvas.width.val, opts.canvas.height.val) },
		
		u_a_amplitude: { type: "f", value: opts.alpha.amplitude.val },
		u_a_pshift: { type: "f", value: opts.alpha.pshift.val },
		u_a_period: { type: "f", value: opts.alpha.period.val },
		u_a_vshift: { type: "f", value: opts.alpha.vshift.val },
		u_a_ratio: {type: "f", value: opts.alpha.ratio.val},
		u_a_decay: {type: "f", value: opts.alpha.decay.val},
		u_a_exponent: {type: "f", value: opts.alpha.exponent.val},
		u_a_plusx: {type:"f", value: opts.alpha.plusx.val},

		u_o_amplitude: { type: "f", value: opts.omega.amplitude.val },
		u_o_pshift: { type: "f", value: opts.omega.pshift.val },
		u_o_period: { type: "f", value: opts.omega.period.val },
		u_o_vshift: { type: "f", value: opts.omega.vshift.val },
		u_o_ratio: {type: "f", value: opts.omega.ratio.val},
		u_o_decay: {type: "f", value: opts.omega.decay.val},
		u_o_exponent: {type: "f", value: opts.omega.exponent.val},
		u_o_plusx: {type:"f", value: opts.omega.plusx.val},

		u_p_pattern_height: {type: "f", value: opts.pattern.patternHeight.val},
		u_p_band_height: {type: "f", value: opts.pattern.bandHeight.val}
	};

	waveTypes.forEach(w => {
		var aVal = opts.alpha.type.val == w ? 1 : 0;
		var oVal = opts.omega.type.val == w ? 1 : 0;

		var uaname = "u_a_" + w;
		var uoname = "u_o_" + w;

		uniforms[uaname] = {type: "f", value: aVal};
		uniforms[uoname] = {type: "f", value: oVal};
	});
}

function initThree() {
	container = document.getElementById('container');
	camera = new THREE.Camera();
	camera.position.z = 1;
	scene = new THREE.Scene();

	material = new THREE.ShaderMaterial({
		uniforms: uniforms,
		vertexShader: document.getElementById('vertexShader').textContent,
		fragmentShader: document.getElementById('fragmentShader').textContent
	});

	mesh = new THREE.Mesh(new THREE.PlaneGeometry(2, 2), material);
	scene.add(mesh);

	renderer = new THREE.WebGLRenderer();
	renderer.setPixelRatio(window.devicePixelRatio ? window.devicePixelRatio : 1);
	container.appendChild(renderer.domElement);
	renderer.setSize(opts.canvas.width.val, opts.canvas.height.val);
}


function initGUI() {
	gui = new dat.GUI();
	alphaF = gui.addFolder("Alpha-Wave");
	omegaF = gui.addFolder("Omega-Wave");
	patternF = gui.addFolder("Pattern");
	canvasF = gui.addFolder("Canvas");

	var vars = {
		alphaType: opts.alpha.type.val,
		omegaType: opts.alpha.type.val
	};

	alphaF.open();
	omegaF.open();
	
	alphaF.add(uniforms.u_a_amplitude, "value").min(opts.alpha.amplitude.min).max(opts.alpha.amplitude.max).name(opts.alpha.amplitude.name);
	alphaF.add(uniforms.u_a_pshift, "value").min(opts.alpha.pshift.min).max(opts.alpha.pshift.max).name(opts.alpha.pshift.name);
	alphaF.add(uniforms.u_a_period, "value").min(opts.alpha.period.min).max(opts.alpha.period.max).name(opts.alpha.period.name);
	alphaF.add(uniforms.u_a_vshift, "value").min(opts.alpha.vshift.min).max(opts.alpha.vshift.max).name(opts.alpha.vshift.name);
	alphaF.add(uniforms.u_a_ratio, "value").min(opts.alpha.ratio.min).max(opts.alpha.ratio.max).name(opts.alpha.ratio.name);
	alphaF.add(uniforms.u_a_decay, "value").min(opts.alpha.decay.min).max(opts.alpha.decay.max).name(opts.alpha.decay.name);
	alphaF.add(uniforms.u_a_exponent, "value").min(opts.alpha.exponent.min).max(opts.alpha.exponent.max).name(opts.alpha.exponent.name);
	alphaF.add(uniforms.u_a_plusx, "value").min(opts.alpha.plusx.min).max(opts.alpha.plusx.max).name(opts.alpha.plusx.name);
	alphaF.add(vars, "alphaType", waveTypes).name(opts.alpha.type.name).onChange(val => {
		waveTypes.forEach(w => {
			var aVal = (val === w) ? 1 : 0;
			var uaname = "u_a_" + w;
			uniforms[uaname].value = aVal;
		});
	});

	omegaF.add(uniforms.u_o_amplitude, "value").min(opts.omega.amplitude.min).max(opts.omega.amplitude.max).name(opts.omega.amplitude.name);
	omegaF.add(uniforms.u_o_pshift, "value").min(opts.omega.pshift.min).max(opts.omega.pshift.max).name(opts.omega.pshift.name);
	omegaF.add(uniforms.u_o_period, "value").min(opts.omega.period.min).max(opts.omega.period.max).name(opts.omega.period.name);
	omegaF.add(uniforms.u_o_vshift, "value").min(opts.omega.vshift.min).max(opts.omega.vshift.max).name(opts.omega.vshift.name);
	omegaF.add(uniforms.u_o_ratio, "value").min(opts.omega.ratio.min).max(opts.omega.ratio.max).name(opts.omega.ratio.name);
	omegaF.add(uniforms.u_o_decay, "value").min(opts.omega.decay.min).max(opts.omega.decay.max).name(opts.omega.decay.name);
	omegaF.add(uniforms.u_o_exponent, "value").min(opts.omega.exponent.min).max(opts.omega.exponent.max).name(opts.omega.exponent.name);
	omegaF.add(uniforms.u_o_plusx, "value").min(opts.omega.plusx.min).max(opts.omega.plusx.max).name(opts.omega.plusx.name);
	omegaF.add(vars, "omegaType", waveTypes).name(opts.omega.type.name).onChange(val => {
		waveTypes.forEach(w => {
			var oVal = (val === w) ? 1 : 0;
			var uoname = "u_o_" + w;
			uniforms[uoname].value = oVal;
			console.log(uniforms[uoname].value);		
		});
	});

	patternF.add(uniforms.u_p_pattern_height, "value").min(opts.pattern.patternHeight.min).max(opts.pattern.patternHeight.max).name(opts.pattern.patternHeight.name);
	patternF.add(uniforms.u_p_band_height, "value").min(opts.pattern.bandHeight.min).max(opts.pattern.bandHeight.max).name(opts.pattern.bandHeight.name);

	canvasF.add(uniforms.u_resolution.value, "x").min(opts.canvas.width.min).max(opts.canvas.width.max).name(opts.canvas.width.name).onChange(val => {
		renderer.setSize(val, renderer.getSize().y);
	});
	canvasF.add(uniforms.u_resolution.value, "y").min(opts.canvas.height.min).max(opts.canvas.height.max).name(opts.canvas.height.name).onChange(val => {
		renderer.setSize(renderer.getSize().x, val);
	});
}


function animate() {
	requestAnimationFrame(animate);
	update();
	render();
}

function update() {
	var elapsedMilliseconds = Date.now() - startTime;
	var elapsedSeconds = elapsedMilliseconds / 1000.;
	uniforms.u_time.value = elapsedSeconds;
}

function render() {
	renderer.render(scene, camera);
}
!
999px

Console