mirror of
https://github.com/greggman/twgl.js.git
synced 2025-12-08 19:26:07 +00:00
196 lines
5.5 KiB
HTML
196 lines
5.5 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 - camera" />
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<meta property="og:type" content="website" />
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<meta property="og:image" content="http://twgljs.org/examples/screenshots/camera.png" />
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<meta property="og:description" content="TWGL.js - camera" />
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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 - camera">
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<meta name="twitter:url" content="http://twgljs.org/examples/camera.html">
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<meta name="twitter:description" content="TWGL.js - camera">
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<meta name="twitter:image:src" content="http://twgljs.org/examples/screenshots/camera.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 - camera</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> - camera</div>
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</body>
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<script id="vs" type="notjs">
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uniform mat4 u_worldViewProjection;
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attribute vec4 a_position;
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attribute vec2 a_texcoord;
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varying vec2 v_texCoord;
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void main() {
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v_texCoord = a_texcoord;
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gl_Position = u_worldViewProjection * a_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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varying vec2 v_texCoord;
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uniform sampler2D u_diffuse;
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void main() {
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gl_FragColor = texture2D(u_diffuse, v_texCoord);
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}
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</script>
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<script src="../3rdparty/chroma.min.js"></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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let playing = false;
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const video = document.createElement("video");
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video.autoPlay = true;
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if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
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navigator.mediaDevices.getUserMedia({ video: true })
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.then(function(stream) {
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video.addEventListener('playing', () => {
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playing = true;
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});
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video.srcObject = stream;
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video.onloadedmetadata = () => {
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video.play();
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};
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})
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.catch(function(error) {
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console.error(error); // eslint-disable-line
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});
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}
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twgl.setDefaults({attribPrefix: "a_"});
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const m4 = twgl.m4;
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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 shapes = [
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twgl.primitives.createCubeBufferInfo(gl, 2),
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];
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function rand(min, max) {
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return min + Math.random() * (max - min);
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}
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// Shared values
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const camera = m4.identity();
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const view = m4.identity();
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const viewProjection = m4.identity();
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const world = m4.identity();
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const tex = twgl.createTexture(gl, {
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minMag: gl.LINEAR,
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wrap: gl.CLAMP_TO_EDGE,
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src: [
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255, 255, 255, 255,
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192, 192, 192, 255,
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192, 192, 192, 255,
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255, 255, 255, 255,
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],
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});
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const objects = [];
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const drawObjects = [];
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const numObjects = 100;
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for (let ii = 0; ii < numObjects; ++ii) {
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const uniforms = {
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u_diffuse: tex,
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u_worldViewProjection: m4.identity(),
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};
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drawObjects.push({
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programInfo: programInfo,
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bufferInfo: shapes[ii % shapes.length],
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uniforms: uniforms,
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});
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objects.push({
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translation: [rand(-5, 5), rand(-5, 5), rand(-5, 5)],
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ySpeed: rand(0.1, 0.3),
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zSpeed: rand(0.1, 0.3),
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uniforms: uniforms,
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});
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}
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function render(time) {
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time *= 0.001;
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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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gl.enable(gl.DEPTH_TEST);
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
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if (playing) {
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gl.bindTexture(gl.TEXTURE_2D, tex);
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gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, video);
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}
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const projection = m4.perspective(30 * Math.PI / 180, gl.canvas.clientWidth / gl.canvas.clientHeight, 0.5, 100);
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const eye = [1, 2, -10];
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const target = [0, 0, 0];
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const up = [0, 1, 0];
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m4.lookAt(eye, target, up, camera);
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m4.inverse(camera, view);
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m4.multiply(projection, view, viewProjection);
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objects.forEach(function(obj) {
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const uni = obj.uniforms;
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m4.identity(world);
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m4.rotateY(world, time * obj.ySpeed, world);
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m4.rotateZ(world, time * obj.zSpeed, world);
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m4.translate(world, obj.translation, world);
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m4.rotateX(world, time, world);
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m4.multiply(viewProjection, world, uni.u_worldViewProjection);
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});
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twgl.drawObjectList(gl, drawObjects);
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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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