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发表于 2021-3-6 10:37:18
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- <!DOCTYPE html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <title>html5背景</title>
-
- <style type="text/css">
- *{margin:0;padding:0;list-style-type:none;}
- a,img{border:0;}
- </style>
- <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
- </head>
- <body>
- <div id="container" style="width:100%;height:700px;">
- <div id="anitOut"></div>
- </div>
- <script type="text/javascript">
- $(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; N--) {
- 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; O--) {
- 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; R--) {
- 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; V--) {
- 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.length; Q < l; Q++) {
- N = I.lights[Q];
- N.ambient.set(T);
- N.ambientHex = N.ambient.format()
- }
- };
- var R = function (T) {
- for (Q = 0, l = I.lights.length; Q < l; Q++) {
- 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('调用cav.js失败');
- }
- });
- </script>
- </body>
- </html>
-
- 相关资源:HTML5 canvas全屏酷炫星空背景动画特效
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