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This article mainly introduces the HTML5 implementation of QQ login example analysis, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Html5 background * {margin:0;padding:0;list-style-type:none;} a dint IMG {border:0 } $(function () {if (! window.ActiveXObject & &! document.createElement ("canvas") .getContext) {$.getScript ("http://im-img.qq.com/pcqq/js/200/cav.js?_=1428576021379", function () {var t = {width: 1.5) Height: 1.5, depth: 10, segments: 12, slices: 6, xRange: 0.8, yRange: 0.1, zRange: 1 Ambient: "# 525252", diffuse: "# FFFFFF", speed: 0.0002} Var G = {count: 2, xyScalar: 1, zOffset: 100, ambient: "# 002c4a", diffuse: "# 005584", speed: 0.001 Gravity: 1200, dampening: 0.95, minLimit: 10, maxLimit: null, minDistance: 20, maxDistance: 400, autopilot: false, draw: false Bounds: CAV.Vector3.create (), step: CAV.Vector3.create (Math.randomInRange (0.2,1), Math.randomInRange (0.2,1), Math.randomInRange (0.2,1))} Var m = "canvas"; var E = "svg"; var x = {renderer: M}; var I, n = Date.now (); var L = CAV.Vector3.create () Var k = CAV.Vector3.create (); var z = document.getElementById ("container"); var w = document.getElementById ("anitOut"); var D, I, h, Q, y; var g; var r Function C () {F (); p (); s (); B (); v (); K (z.offsetWidth, z.offsetHeight) O ()} function F () {g = new CAV.CanvasRenderer () H (x.renderer)} function H (N) {if (D) {w.removeChild (D.element)} switch (N) { Case m: d = g Break} D.setSize (z.offsetWidth, z.offsetHeight) W.appendChild (D.element)} function p () {I = new CAV.Scene ()} function s () {I.remove (h); D.clear () Q = new CAV.Plane (t.width * D.width, t.height * D.height, t.segments, t.slices); y = new CAV.Material (t.ambient, t.diffuse); h = new CAV.Mesh (Q, y); I.add (h); var N, O For (N = q.vertices.length-1; N > = 0; Nmi -) {O = q.vertices [N]; O.anchor = CAV.Vector3.clone (O.position) O.step = CAV.Vector3.create (Math.randomInRange (0.2,1), Math.randomInRange (0.2,1), Math.randomInRange (0.2,1)) O.time = Math.randomInRange (0, Math.PIM2)}} function B () {var O, N; for (O = I.lights.length-1; O > = 0 Omuri -) {N = I.lights [O]; I.remove (N)} D.clear (); for (O = 0; O

< G.count; O++) { N = new CAV.Light(G.ambient, G.diffuse); N.ambientHex = N.ambient.format(); N.diffuseHex = N.diffuse.format(); I.add(N); N.mass = Math.randomInRange(0.5, 1); N.velocity = CAV.Vector3.create(); N.acceleration = CAV.Vector3.create(); N.force = CAV.Vector3.create() } } function K(O, N) { D.setSize(O, N); CAV.Vector3.set(L, D.halfWidth, D.halfHeight); s() } function o() { i = Date.now() - n; u(); M(); requestAnimationFrame(o) } function u() { var Q, P, O, R, T, V, U, S = t.depth / 2; CAV.Vector3.copy(G.bounds, L); CAV.Vector3.multiplyScalar(G.bounds, G.xyScalar); CAV.Vector3.setZ(k, G.zOffset); for (R = I.lights.length - 1; R >

= 0; Rmure -) {T = I.lights [R]; CAV.Vector3.setZ (T.position, G.zOffset); var N = Math.clamp (CAV.Vector3.distanceSquared (T.position, k), G.minDistance, G.maxDistance); var W = G.gravity * T.mass / N CAV.Vector3.subtractVectors (T.force, k, T.position); CAV.Vector3.normalise (T.force); CAV.Vector3.multiplyScalar (T.force, W); CAV.Vector3.set (T.acceleration) CAV.Vector3.add (T.acceleration, T.force); CAV.Vector3.add (T.velocity, T.acceleration); CAV.Vector3.multiplyScalar (T.velocity, G.dampening); CAV.Vector3.limit (T.velocity, G.minLimit, G.maxLimit) CAV.Vector3.add (T.position, T.velocity)} for (V = q.vertices.length-1; V > = 0; Vmura -) {U = q.vertices [V] Q = Math.sin (U.time + U.step [0] * I * t.speed); P = Math.cos (U.time + U.step [1] * I * t.speed); O = Math.sin (U.time + U.step [2] * I * t.speed) CAV.Vector3.set (U.position, t.xRange * q.segmentWidth * Q, t.yRange * q.sliceHeight * P, t.zRange * S * O-S) CAV.Vector3.add (U.position U.anchor)} q.dirty = true} function M () {D.render (I)} function J (O) {var Q, N, S = O Var P = function (T) {for (Q = 0, l = I.lights.stories; Q < l; QQ +) {N = I.lights [Q]; N.ambient.set (T) N.ambientHex = N.ambient.format ()}}; var R = function (T) {for (Q = 0, l = I.lights.duration; Q < l) ) {N = I.lights [Q]; N.diffuse.set (T); N.diffuseHex = N.diffuse.format ()}} Return {set: function () {P (S [0]) R (S [1])}} function v () {window.addEventListener ("resize") J)} function A (N) {CAV.Vector3.set (k, N.x, D.height-N.y) CAV.Vector3.subtract (k, L)} function j (N) {K (z.offsetWidth, z.offsetHeight); M ()} C () })} else {alert ('failed to call cav.js');}}); Thank you for reading this article carefully. I hope the article "sample Analysis of HTML5 implementation of QQ login" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel, and more related knowledge is waiting for you to learn!

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