Last active
August 29, 2015 14:00
-
-
Save digitarald/11062193 to your computer and use it in GitHub Desktop.
Benchmark for setting transform styles from a 3d matrix
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE HTML> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Famous test</title> | |
| <meta name="viewport" content="width=device-width, maximum-scale=1, user-scalable=no" /> | |
| <style> | |
| html, body { | |
| margin: 0; | |
| padding: 0; | |
| overflow: hidden; | |
| width: 480px; | |
| height: 320px; | |
| } | |
| .surface { | |
| position: absolute; | |
| -webkit-transform-origin: center center; | |
| transform-origin: center center; | |
| -webkit-backface-visibility: hidden; | |
| backface-visibility: hidden; | |
| top: -2rem; | |
| left: -2rem; | |
| height: 4rem; | |
| width: 4rem; | |
| background-color: #000; | |
| opacity: 0.4; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript" src="https://rawgithub.com/toji/gl-matrix/master/dist/gl-matrix.js"></script> | |
| <script type="text/javascript" src="index.js"></script> | |
| </body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| (function() { | |
| 'use strict'; | |
| var body = document.body; | |
| var maxWidth = body.offsetWidth; | |
| var maxHeight = body.offsetHeight; | |
| var benchMax = location.hash.substr(1); | |
| if (benchMax) { | |
| benchMax = Number(benchMax); | |
| } else { | |
| benchMax = 200; | |
| } | |
| /** | |
| * Create surfaces | |
| */ | |
| var surfaces = []; | |
| for (var i = 0; i < benchMax; i++) { | |
| var matrix = mat4.create(); | |
| mat4.translate(matrix, matrix, [Math.random() * maxWidth, Math.random() * maxHeight, 0]); | |
| mat4.rotateX(matrix, matrix, Math.random() * Math.PI / 2); | |
| mat4.rotateY(matrix, matrix, Math.random() * Math.PI / 2); | |
| var element = document.createElement('div'); | |
| element.classList.add('surface'); | |
| apply3DMatrix(element, matrix); | |
| body.appendChild(element); | |
| surfaces.push({ | |
| matrix: matrix, | |
| element: element | |
| }); | |
| } | |
| /** | |
| * Animate surfaces | |
| */ | |
| function tick(now) { | |
| var dt = (now - past) / 1000; | |
| past = now; | |
| for (var i = 0, l = surfaces.length; i < l; i++) { | |
| var matrix = surfaces[i].matrix; | |
| var element = surfaces[i].element; | |
| update3DMatrix(matrix, dt); | |
| apply3DMatrixFor(element, matrix); | |
| } | |
| requestAnimationFrame(tick); | |
| } | |
| var speed = Math.PI / 4; | |
| function update3DMatrix(matrix, dt) { | |
| mat4.rotateZ(matrix, matrix, speed * dt); | |
| } | |
| // Slow for loop, will not JIT | |
| function apply3DMatrixFor(element, matrix) { | |
| element.style.transform = stringify3DMatrix(matrix); | |
| } | |
| function stringify3DMatrix(m) { | |
| var result = 'matrix3d('; | |
| for (var i = 0; i < 15; i++) { | |
| result += (m[i] < 0.000001 && m[i] > -0.000001) ? '0,' : m[i] + ','; | |
| } | |
| result += m[15] + ')'; | |
| return result; | |
| } | |
| function apply3DMatrix(element, m) { | |
| element.style.transform = 'matrix3d(' + m[0] + ',' + m[1] + ',' + | |
| m[2] + ',' + m[3] + ',' + m[4] + ',' + m[5] + ',' + m[6] + ',' + | |
| m[7] + ',' + m[8] + ',' + m[9] + ',' + m[10] + ',' + m[11] + ',' + | |
| m[12] + ',' + [13] + ',' + m[14] + ',' + m[15] + ')'; | |
| debugger; | |
| } | |
| var past = performance.now(); | |
| requestAnimationFrame(tick); | |
| })(); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment