mirror of
https://github.com/greggman/twgl.js.git
synced 2025-12-08 19:26:07 +00:00
111 lines
3.4 KiB
HTML
111 lines
3.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf8">
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<!--
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@license twgl.js Copyright (c) 2015, Gregg Tavares All Rights Reserved.
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Available via the MIT license.
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see: http://github.com/greggman/twgl.js for details
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-->
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<meta property="og:title" content="TWGL.js - tiny" />
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<meta property="og:type" content="website" />
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<meta property="og:image" content="http://twgljs.org/examples/screenshots/tiny.png" />
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<meta property="og:description" content="TWGL.js - tiny" />
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<meta property="og:url" content="http://twgljs.org" />
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<meta name="twitter:card" content="summary_large_image">
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<meta name="twitter:site" content="@greggman">
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<meta name="twitter:creator" content="@greggman">
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<meta name="twitter:domain" content="twgljs.org">
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<meta name="twitter:title" content="TWGL.js - tiny">
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<meta name="twitter:url" content="http://twgljs.org/examples/tiny.html">
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<meta name="twitter:description" content="TWGL.js - tiny">
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<meta name="twitter:image:src" content="http://twgljs.org/examples/screenshots/tiny.png">
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<link href="/resources/images/twgljs-icon.png" rel="shortcut icon" type="image/png">
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<title>twgl.js - tiny</title>
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<style>
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html, body {
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margin: 0;
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font-family: monospace;
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height: 100%;
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}
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canvas {
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display: block;
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width: 100%;
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height: 100%;
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}
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#b {
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position: absolute;
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top: 10px;
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width: 100%;
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text-align: center;
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z-index: 2;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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<div id="b"><a href="http://twgljs.org">twgl.js</a> - tiny</div>
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</body>
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<script id="vs" type="notjs">
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attribute vec4 position;
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void main() {
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gl_Position = position;
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}
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</script>
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<script id="fs" type="notjs">
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precision mediump float;
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uniform vec2 resolution;
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uniform float time;
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void main() {
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vec2 uv = gl_FragCoord.xy / resolution;
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float color = 0.0;
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// lifted from glslsandbox.com
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color += sin( uv.x * cos( time / 3.0 ) * 60.0 ) + cos( uv.y * cos( time / 2.80 ) * 10.0 );
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color += sin( uv.y * sin( time / 2.0 ) * 40.0 ) + cos( uv.x * sin( time / 1.70 ) * 40.0 );
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color += sin( uv.x * sin( time / 1.0 ) * 10.0 ) + sin( uv.y * sin( time / 3.50 ) * 80.0 );
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color *= sin( time / 10.0 ) * 0.5;
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gl_FragColor = vec4( vec3( color * 0.5, sin( color + time / 2.5 ) * 0.75, color ), 1.0 );
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}
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</script>
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<script type="module">
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import * as twgl from '../dist/7.x/twgl-full.module.js';
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const gl = document.querySelector("#c").getContext("webgl");
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const programInfo = twgl.createProgramInfo(gl, ["vs", "fs"]);
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const arrays = {
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position: [-1, -1, 0, 1, -1, 0, -1, 1, 0, -1, 1, 0, 1, -1, 0, 1, 1, 0],
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};
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const bufferInfo = twgl.createBufferInfoFromArrays(gl, arrays);
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function render(time) {
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twgl.resizeCanvasToDisplaySize(gl.canvas);
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gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
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const uniforms = {
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time: time * 0.001,
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resolution: [gl.canvas.width, gl.canvas.height],
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};
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gl.useProgram(programInfo.program);
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twgl.setBuffersAndAttributes(gl, programInfo, bufferInfo);
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twgl.setUniforms(programInfo, uniforms);
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twgl.drawBufferInfo(gl, bufferInfo);
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requestAnimationFrame(render);
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}
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requestAnimationFrame(render);
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</script>
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</html>
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