CodePen Embed - Halftone Circles (try scrolling)

Live

This Pen is owned by Lea Rosema on CodePen.

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

{"__browser":{"country":"US","device":"unknown_device","mobile":false,"name":"unknown browser","platform":"unknown_platform","version":"0"},"__constants":{},"__CPDATA":{"domain_iframe":"https://cdpn.io","environment":"production","host":"codepen.io","iframe_allow":"accelerometer *; ambient-light-sensor *; camera *; display-capture *; encrypted-media *; geolocation *; gyroscope *; microphone *; midi *; payment *; vr *; web-share *; serial *; xr-spatial-tracking *","iframe_sandbox":"allow-downloads allow-forms allow-modals allow-pointer-lock allow-popups-to-escape-sandbox allow-popups allow-presentation allow-same-origin allow-scripts allow-top-navigation-by-user-activation"},"__graphql":{"data":{"errors":[{"message":"Cannot return null for non-nullable field Query.sessionUser"}],"data":null},"url":"https://codepen.io/graphql","api":"cprails"},"__pay_stripe_public_key":"pk_live_2GndomDfiklqpSNQn8FrGuwZSMIMzha7DkLJqlYe7IR0ihKAlKdiHg68JJc5eVPt68rzAjzAAVXcUwjySHRCsgjQQ00gtRBUFNH","__pay_braintree_env":"production","__boomboom":{"serve_url":"https://cdpn.io/cpe/boomboom","store_url":"https://codepen.io/cpe/boomboom/store"},"__pageType":"embed","__item":"{\"editor_settings\":{\"auto_run\":true,\"autocomplete\":false,\"code_folding\":true,\"css_pre_processor\":\"none\",\"css_prefix\":\"neither\",\"css_starter\":\"neither\",\"emmet_active\":true,\"font_size\":14,\"font_type\":\"system\",\"format_on_save\":false,\"html_pre_processor\":\"none\",\"indent_with\":\"spaces\",\"js_pre_processor\":\"none\",\"key_bindings\":\"normal\",\"line_numbers\":true,\"line_wrapping\":true,\"match_brackets\":true,\"snippets\":{\"markupSnippets\":{},\"stylesheetSnippets\":{}},\"tab_size\":2,\"theme\":\"twilight\",\"id\":\"BajJbgd\",\"auto_save\":true},\"hashid\":\"BajJbgd\",\"itemType\":\"pen\",\"resources\":[{\"url\":\"https://unpkg.com/glea@latest\",\"order\":0,\"resource_type\":\"js\",\"par_content\":\"\"},{\"url\":\"https://cdn.jsdelivr.net/npm/gsap@3.3.4/dist/gsap.min.js\",\"order\":1,\"resource_type\":\"js\",\"par_content\":\"\"},{\"url\":\"https://cdn.jsdelivr.net/npm/gsap@3.3.4/dist/ScrollTrigger.js\",\"order\":2,\"resource_type\":\"js\",\"par_content\":\"\"}],\"tags\":[\"codepenchallenge\",\"glsl\"],\"id\":45707456,\"user_id\":90647,\"html\":\"<canvas id=\\\"canv\\\"></canvas>\\n<input id=\\\"warpSpeed\\\" value=\\\"0\\\" />\",\"css\":\"body {\\n  margin: 0;\\n  height: 200vh;\\n}\\n\\n/* scrollbar hide hacks */\\nbody::-webkit-scrollbar { width:0; }\\n\\ncanvas {\\n  display: block;\\n  position: fixed;\\n  top: 0;\\n  left: 0;\\n  width: 100vw;\\n  height: 100vh;\\n}\\n\\n#warpSpeed {\\n  display: none;\\n  top: 16px;\\n  left: 16px;\\n  position: fixed;\\n  background: transparent;\\n  width: 150px;\\n  border: 1px solid #fff;\\n  color: #fff;\\n  font-family: monospace;\\n  \\n}\",\"js\":\"const warpSpeed = document.querySelector('#warpSpeed');\\ngsap.registerPlugin(ScrollTrigger);\\ngsap.to('#warpSpeed', {\\n  value: 100,\\n  ease: 'none',\\n  scrollTrigger: { scrub: 0.1 }\\n});\\nconst glsl = x => x;\\n\\nconst frag = glsl`\\nprecision highp float;\\nuniform float time;\\nuniform float width;\\nuniform float height;\\nuniform float warpSpeed;\\n\\nconst float PI = 3.141592654;\\nconst float DEG = PI / 180.0;\\n\\nvec2 coords() {\\n  float vmin = min(width, height);\\n  return vec2((gl_FragCoord.x - width * .5) / vmin,\\n              (gl_FragCoord.y - height * .5) / vmin);\\n}\\n\\nvec2 rotate(vec2 p, float a) {\\n  return vec2(p.x * cos(a) - p.y * sin(a),\\n              p.x * sin(a) + p.y * cos(a));\\n}\\n\\nvec2 repeat(in vec2 p, in vec2 c) {\\n  return mod(p, c) - 0.5 * c;\\n}\\n\\n// Distance functions by Inigo Quilez\\n// https://iquilezles.org/www/articles/distfunctions2d/distfunctions2d.htm\\nfloat circle(in vec2 p, in vec2 pos, float radius) {\\n  return length((p - pos)) - radius;\\n}\\n\\nfloat symmetricDiff(float a, float b)\\n{\\n    // (A ∪ B) \\\\ (A ∩ B)\\n    return max(min(a, b), -max(a, b));\\n}\\n\\nfloat subtract(float a, float b)\\n{\\n    return max(-a, b);\\n}\\n\\nfloat circlesField(vec2 p, vec2 pCenter) {\\n  float d = 1000.;\\n  float s = .7;\\n  for (int i = 9; i >= 0; i-= 2) {\\n    d = min(d, circle(p, pCenter, float(i) * s));\\n    d = subtract(circle(p, pCenter, float(i-1) * s), d);\\n  }\\n  return d;\\n}\\n\\nfloat rectanglesField(vec2 p, vec2 pCenter) {\\n  return 0.;\\n}\\n\\nvec2 dotPattern(vec2 p) {\\n float w = 55. - max(0., warpSpeed / 6.);\\n return p + sin(p.x * w + time) * cos(p.y * w + time * .1 ) * .125;\\n}\\n\\nfloat aa(float d) {\\n  return smoothstep(.0, .05, d);\\n}\\n\\n\\nvec2 scene1(in vec2 p) {\\n  p = rotate(p, -time * DEG);\\n  float d0 = circlesField(p, vec2(sin(time * .3), cos(time * .2)));\\n  float d1 = circlesField(p, vec2(sin(1. + time * .3), cos(1. + time * .2)));\\n  return vec2(d0, d1);\\n}\\n\\nvec2 scene2(in vec2 p) {\\n  p = rotate(p, time * DEG);\\n  vec2 q = vec2(cos(time * .2) * .7, sin(time * .3) * .7); \\n  return vec2(\\n    circle(mod(p, 4.) - 2., vec2(0.), 2.),\\n    circle(mod(p + q, 4.) - 2., vec2(0.), 2.)\\n  );\\n}\\n\\nvec3 shade(in vec2 p)\\n{\\n  float sceneId = floor(time / 1e3);\\n  p = dotPattern(p);\\n  vec3 background = vec3(.5 + sin(time * .05 + p.x * .1) * cos(p.y * .4 + p.x * .2), .2 + sin(time *.1 + p.x * .2) * cos(time * .1 + p.y * .13), .7);\\n  vec3 white = vec3(1., 1., 1.);\\n  vec3 black = vec3(0., 0., 0.);\\n  vec2 s1 = scene1(p);\\n  vec2 s2 = scene2(p);\\n  float x = warpSpeed / 100.; // .5 + sin(time * .1) * .5\\n  vec2 s = mix(s1, s2, x);\\n  vec3 col0 = mix(white, black, aa(s.x));\\n  vec3 col1 = mix(white, black, aa(s.y));\\n  vec3 col = background + col0 - col1;\\n\\n  return col;\\n}\\n\\n\\nvoid main () {\\n  vec2 p0 = coords();\\n  float zoom = 7.;\\n  vec3 col = shade(p0 * zoom);\\n  gl_FragColor = vec4(col, 1.0);\\n}\\n`\\n\\nconst vert = glsl`\\nprecision mediump float;\\nattribute vec2 position;\\n\\nvoid main () {\\n  gl_Position = vec4(position, 0, 1.0);\\n}\\n`\\n\\n\\n\\n\\nlet texture = null;\\n\\nconst glea = new GLea({\\n  shaders: [\\n    GLea.fragmentShader(frag),\\n    GLea.vertexShader(vert)\\n  ]\\n}).create();\\n\\nfunction loop(time) {\\n  const { gl } = glea;\\n  glea.clear();\\n  glea.uni('width', glea.width);\\n  glea.uni('height', glea.height);\\n  glea.uni('time', time * .005);\\n  glea.uni('warpSpeed', parseFloat(warpSpeed.value));\\n  gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);\\n  requestAnimationFrame(loop);\\n}\\n\\nfunction setup() {\\n  const { gl } = glea;\\n  window.addEventListener('resize', () => {\\n    glea.resize();\\n  });\\n  loop(0);\\n}\\n\\nsetup();\\n\",\"html_pre_processor\":\"none\",\"css_pre_processor\":\"none\",\"js_pre_processor\":\"none\",\"html_classes\":\"\",\"css_starter\":\"neither\",\"js_library\":null,\"created_at\":\"2020-07-03T18:39:00.000Z\",\"updated_at\":\"2020-07-07T15:30:31.000Z\",\"title\":\"Halftone Circles (try scrolling) - #anydayshaders 05\",\"description\":\"Halftone Circles. Try scrolling :)\",\"slug_hash\":\"BajJbgd\",\"head\":\"\",\"private\":false,\"has_animation\":true,\"team_id\":0,\"css_prefix\":\"neither\",\"template\":false,\"parent_id\":40530131,\"comments_count\":0,\"custom_screenshot_filename\":null,\"loves_count\":0,\"pick\":false,\"popularity_score\":0,\"views_count\":0,\"pick_visible_at\":null,\"cpid\":\"017315f9-81a0-7761-815d-4ca29d3c5c16\",\"is_new_editor_pen\":false,\"protected\":false,\"access\":\"Public\",\"pen_hash\":null}","__processorsMap":{"autoprefixer":"autoprefixer-10","babel":"babel-7","coffeescript":"coffeescript-2","format-1":"format-1","flutter":"flutter-1","haml":"haml-4","less":"less-3","lint-1":"lint-1","livescript":"livescript-1","markdown":"markdown-11","postcss":"postcss-7","pug":"pug-2","sass":"sass-1","scss":"sass-1","sass-ruby-3":"sass-ruby-3","sass-ruby-compass-3":"sass-ruby-compass-3","slim":"slim-3","stylus":"stylus-0","typescript":"typescript-4","vue":"vue-2","vue3":"vue-3"},"__favicon_mask_icon":"https://cpwebassets.codepen.io/assets/favicon/logo-pin-b4b4269c16397ad2f0f7a01bcdf513a1994f4c94b8af2f191c09eb0d601762b1.svg","__favicon_shortcut_icon":"https://cpwebassets.codepen.io/assets/favicon/favicon-aec34940fbc1a6e787974dcd360f2c6b63348d4b1f4e06c77743096d55480f33.ico","__path_to_iframe_console_runner":"https://cpwebassets.codepen.io/assets/editor/iframe/iframeConsoleRunner-6d8bf8b4b479137260842506acbb12717dace0823c023e08b96360e60b0840d9.js","__path_to_iframe_refresh_css":"https://cpwebassets.codepen.io/assets/editor/iframe/iframeRefreshCSS-44fe83e49b63affec96918c9af88c0d80b209a862cf87ac46bc933074b8c557d.js","__path_to_iframe_runtime_errors":"https://cpwebassets.codepen.io/assets/editor/iframe/iframeRuntimeErrors-4f205f2c14e769b448bcf477de2938c681660d5038bc464e3700256713ebe261.js","__path_to_processor_worker":"https://cpwebassets.codepen.io/assets/packs/router.js","__path_to_stop_execution_on_timeout":"https://cpwebassets.codepen.io/assets/common/stopExecutionOnTimeout-2c7831bb44f98c1391d6a4ffda0e1fd302503391ca806e7fcc7b9b87197aec26.js","__pen_normalize_css_url":"https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css","__pen_prefix_free_url":"https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js","__pen_reset_css_url":"https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css"}