网站设置QQ官网Canvas[教程]

    选择打赏方式

废话几句:

前几天看到别人网站上把QQ官网的Canvas背景弄上去了,一看还不错的样子。

就想着抠下来,谁想TMD吧JS混压了...

无奈只能从官网慢慢抠,慢慢精简。

真是日了狗了啊....


主要结构:

HTML主体


<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="description" content="">
<meta name="keywords" content="">
<link href="js/style.css" rel="stylesheet">
</head>
<body>
<div id="waibu" style="width: 100%;height: 100%;">
<div id="neibu"></div>
<div id="fshow"></div>
<ul id="bnav"><li></li><li></li><li></li><li></li></ul></div>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js">
<script src="js/main.js"></script>
</body>
</html>


CSS样式:style.css


<style type="text/css">
body{margin:0}
#neibu{position:absolute;margin:0;width:100%;height:100%;z-index:1}
#bnav{position:absolute;left:50%;bottom:50px;width:80px;margin-left:-40px;z-index:400}
#bnav li{float:left;width:14px;height:14px;margin-right:6px;border-radius:10px;background:#ccc;box-shadow:0 0 2px #fff;list-style:none}
#bnav .current{box-shadow:0 0 20px #fff}
#bnav li:nth-child(1){background:#005584}
#bnav li:nth-child(2){background:#35ac03}
#bnav li:nth-child(3){background:#ac0908}
#bnav li:nth-child(4){background:#18bbff}
</style>

JavaScript部分:main.js


$(function() {
	$.fn.bannerShow = function(g) {
		g = jQuery.extend({
			wraper: "fshow",
			ind: 0,
			changeColor: null
		}, g || {});
		return this.each(function() {
			var o;
			var n = 0;
			var i = this;
			var j = $("#bnav"),
				k = $("li", j);
			var h = [
				["#002c4a", "#005584"],
				["#35ac03", "#3f4303"],
				["#ac0908", "#cd5726"],
				["18bbff", "#00486b"]
			];
			m(0);
			k.each(function(p, q) {
				$(q).mouseover(function() {
					n = p;
					k.removeClass().eq(n).addClass("current");
					m(n)
				})
			});

			function m(p) {
				if (g.changeColor) {
					g.changeColor(h[p]).set()
				}
			}
		})
	};
	if (!window.ActiveXObject && !! document.createElement("canvas").getContext) {
		$.getScript("js/cav.js", 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("waibu");
			var w = document.getElementById("neibu");
			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();
			$("#fshow").bannerShow({
				changeColor: J
			})
		})
	} else {
		$("#fshow").bannerShow()
	}
});



JAVAScript文件 cav.js

CAV={FRONT:0,BACK:1,DOUBLE:2,SVGNS:"http://www.w3.org/2000/svg"};CAV.Array=typeof Float32Array==="function"?Float32Array:Array;CAV.Utils={isNumber:function(a){return!isNaN(parseFloat(a))&&isFinite(a)}};
(function(){for(var a=0,b=["ms","moz","webkit","o"],c=0;c<b.length&&!window.requestAnimationFrame;++c)window.requestAnimationFrame=window[b[c]+"RequestAnimationFrame"],window.cancelAnimationFrame=window[b[c]+"CancelAnimationFrame"]||window[b[c]+"CancelRequestAnimationFrame"];if(!window.requestAnimationFrame)window.requestAnimationFrame=function(b){var c=(new Date).getTime(),f=Math.max(0,16-(c-a)),g=window.setTimeout(function(){b(c+f)},f);a=c+f;return g};if(!window.cancelAnimationFrame)window.cancelAnimationFrame=
function(a){clearTimeout(a)}})();Math.PIM2=Math.PI*2;Math.PID2=Math.PI/2;Math.randomInRange=function(a,b){return a+(b-a)*Math.random()};Math.clamp=function(a,b,c){a=Math.max(a,b);return a=Math.min(a,c)};
CAV.Vector3={create:function(a,b,c){var d=new CAV.Array(3);this.set(d,a,b,c);return d},clone:function(a){var b=this.create();this.copy(b,a);return b},set:function(a,b,c,d){a[0]=b||0;a[1]=c||0;a[2]=d||0;return this},setX:function(a,b){a[0]=b||0;return this},setY:function(a,b){a[1]=b||0;return this},setZ:function(a,b){a[2]=b||0;return this},copy:function(a,b){a[0]=b[0];a[1]=b[1];a[2]=b[2];return this},add:function(a,b){a[0]+=b[0];a[1]+=b[1];a[2]+=b[2];return this},addVectors:function(a,b,c){a[0]=b[0]+
c[0];a[1]=b[1]+c[1];a[2]=b[2]+c[2];return this},addScalar:function(a,b){a[0]+=b;a[1]+=b;a[2]+=b;return this},subtract:function(a,b){a[0]-=b[0];a[1]-=b[1];a[2]-=b[2];return this},subtractVectors:function(a,b,c){a[0]=b[0]-c[0];a[1]=b[1]-c[1];a[2]=b[2]-c[2];return this},subtractScalar:function(a,b){a[0]-=b;a[1]-=b;a[2]-=b;return this},multiply:function(a,b){a[0]*=b[0];a[1]*=b[1];a[2]*=b[2];return this},multiplyVectors:function(a,b,c){a[0]=b[0]*c[0];a[1]=b[1]*c[1];a[2]=b[2]*c[2];return this},multiplyScalar:function(a,
b){a[0]*=b;a[1]*=b;a[2]*=b;return this},divide:function(a,b){a[0]/=b[0];a[1]/=b[1];a[2]/=b[2];return this},divideVectors:function(a,b,c){a[0]=b[0]/c[0];a[1]=b[1]/c[1];a[2]=b[2]/c[2];return this},divideScalar:function(a,b){b!==0?(a[0]/=b,a[1]/=b,a[2]/=b):(a[0]=0,a[1]=0,a[2]=0);return this},cross:function(a,b){var c=a[0],d=a[1],e=a[2];a[0]=d*b[2]-e*b[1];a[1]=e*b[0]-c*b[2];a[2]=c*b[1]-d*b[0];return this},crossVectors:function(a,b,c){a[0]=b[1]*c[2]-b[2]*c[1];a[1]=b[2]*c[0]-b[0]*c[2];a[2]=b[0]*c[1]-b[1]*
c[0];return this},min:function(a,b){a[0]<b&&(a[0]=b);a[1]<b&&(a[1]=b);a[2]<b&&(a[2]=b);return this},max:function(a,b){a[0]>b&&(a[0]=b);a[1]>b&&(a[1]=b);a[2]>b&&(a[2]=b);return this},clamp:function(a,b,c){this.min(a,b);this.max(a,c);return this},limit:function(a,b,c){var d=this.length(a);b!==null&&d<b?this.setLength(a,b):c!==null&&d>c&&this.setLength(a,c);return this},dot:function(a,b){return a[0]*b[0]+a[1]*b[1]+a[2]*b[2]},normalise:function(a){return this.divideScalar(a,this.length(a))},negate:function(a){return this.multiplyScalar(a,
-1)},distanceSquared:function(a,b){var c=a[0]-b[0],d=a[1]-b[1],e=a[2]-b[2];return c*c+d*d+e*e},distance:function(a,b){return Math.sqrt(this.distanceSquared(a,b))},lengthSquared:function(a){return a[0]*a[0]+a[1]*a[1]+a[2]*a[2]},length:function(a){return Math.sqrt(this.lengthSquared(a))},setLength:function(a,b){var c=this.length(a);c!==0&&b!==c&&this.multiplyScalar(a,b/c);return this}};
CAV.Vector4={create:function(a,b,c){var d=new CAV.Array(4);this.set(d,a,b,c);return d},set:function(a,b,c,d,e){a[0]=b||0;a[1]=c||0;a[2]=d||0;a[3]=e||0;return this},setX:function(a,b){a[0]=b||0;return this},setY:function(a,b){a[1]=b||0;return this},setZ:function(a,b){a[2]=b||0;return this},setW:function(a,b){a[3]=b||0;return this},add:function(a,b){a[0]+=b[0];a[1]+=b[1];a[2]+=b[2];a[3]+=b[3];return this},multiplyVectors:function(a,b,c){a[0]=b[0]*c[0];a[1]=b[1]*c[1];a[2]=b[2]*c[2];a[3]=b[3]*c[3];return this},
multiplyScalar:function(a,b){a[0]*=b;a[1]*=b;a[2]*=b;a[3]*=b;return this},min:function(a,b){a[0]<b&&(a[0]=b);a[1]<b&&(a[1]=b);a[2]<b&&(a[2]=b);a[3]<b&&(a[3]=b);return this},max:function(a,b){a[0]>b&&(a[0]=b);a[1]>b&&(a[1]=b);a[2]>b&&(a[2]=b);a[3]>b&&(a[3]=b);return this},clamp:function(a,b,c){this.min(a,b);this.max(a,c);return this}};CAV.Color=function(a,b){this.rgba=CAV.Vector4.create();this.hex=a||"#000000";this.opacity=CAV.Utils.isNumber(b)?b:1;this.set(this.hex,this.opacity)};
CAV.Color.prototype={set:function(a,b){var a=a.replace("#",""),c=a.length/3;this.rgba[0]=parseInt(a.substring(c*0,c*1),16)/255;this.rgba[1]=parseInt(a.substring(c*1,c*2),16)/255;this.rgba[2]=parseInt(a.substring(c*2,c*3),16)/255;this.rgba[3]=CAV.Utils.isNumber(b)?b:this.rgba[3];return this},hexify:function(a){a=Math.ceil(a*255).toString(16);a.length===1&&(a="0"+a);return a},format:function(){var a=this.hexify(this.rgba[0]),b=this.hexify(this.rgba[1]),c=this.hexify(this.rgba[2]);return this.hex="#"+
a+b+c}};CAV.Object=function(){this.position=CAV.Vector3.create()};CAV.Object.prototype={setPosition:function(a,b,c){CAV.Vector3.set(this.position,a,b,c);return this}};CAV.Light=function(a,b){CAV.Object.call(this);this.ambient=new CAV.Color(a||"#FFFFFF");this.diffuse=new CAV.Color(b||"#FFFFFF");this.ray=CAV.Vector3.create()};CAV.Light.prototype=Object.create(CAV.Object.prototype);CAV.Vertex=function(a,b,c){this.position=CAV.Vector3.create(a,b,c)};
CAV.Vertex.prototype={setPosition:function(a,b,c){CAV.Vector3.set(this.position,a,b,c);return this}};
CAV.Triangle=function(a,b,c){this.a=a||new CAV.Vertex;this.b=b||new CAV.Vertex;this.c=c||new CAV.Vertex;this.vertices=[this.a,this.b,this.c];this.u=CAV.Vector3.create();this.v=CAV.Vector3.create();this.centroid=CAV.Vector3.create();this.normal=CAV.Vector3.create();this.color=new CAV.Color;this.polygon=document.createElementNS(CAV.SVGNS,"polygon");this.polygon.setAttributeNS(null,"stroke-linejoin","round");this.polygon.setAttributeNS(null,"stroke-miterlimit","1");this.polygon.setAttributeNS(null,"stroke-width",
"1");this.computeCentroid();this.computeNormal()};
CAV.Triangle.prototype={computeCentroid:function(){this.centroid[0]=this.a.position[0]+this.b.position[0]+this.c.position[0];this.centroid[1]=this.a.position[1]+this.b.position[1]+this.c.position[1];this.centroid[2]=this.a.position[2]+this.b.position[2]+this.c.position[2];CAV.Vector3.divideScalar(this.centroid,3);return this},computeNormal:function(){CAV.Vector3.subtractVectors(this.u,this.b.position,this.a.position);CAV.Vector3.subtractVectors(this.v,this.c.position,this.a.position);CAV.Vector3.crossVectors(this.normal,
this.u,this.v);CAV.Vector3.normalise(this.normal);return this}};CAV.Geometry=function(){this.vertices=[];this.triangles=[];this.dirty=false};CAV.Geometry.prototype={update:function(){if(this.dirty){var a,b;for(a=this.triangles.length-1;a>=0;a--)b=this.triangles[a],b.computeCentroid(),b.computeNormal();this.dirty=false}return this}};
CAV.Plane=function(a,b,c,d){CAV.Geometry.call(this);this.width=a||100;this.height=b||100;this.segments=c||4;this.slices=d||4;this.segmentWidth=this.width/this.segments;this.sliceHeight=this.height/this.slices;var e,f,g,c=[];e=this.width*-0.5;f=this.height*0.5;for(a=0;a<=this.segments;a++){c.push([]);for(b=0;b<=this.slices;b++)d=new CAV.Vertex(e+a*this.segmentWidth,f-b*this.sliceHeight),c[a].push(d),this.vertices.push(d)}for(a=0;a<this.segments;a++)for(b=0;b<this.slices;b++)d=c[a+0][b+0],e=c[a+0][b+
1],f=c[a+1][b+0],g=c[a+1][b+1],t0=new CAV.Triangle(d,e,f),t1=new CAV.Triangle(f,e,g),this.triangles.push(t0,t1)};CAV.Plane.prototype=Object.create(CAV.Geometry.prototype);CAV.Material=function(a,b){this.ambient=new CAV.Color(a||"#444444");this.diffuse=new CAV.Color(b||"#FFFFFF");this.slave=new CAV.Color};CAV.Mesh=function(a,b){CAV.Object.call(this);this.geometry=a||new CAV.Geometry;this.material=b||new CAV.Material;this.side=CAV.FRONT;this.visible=true};CAV.Mesh.prototype=Object.create(CAV.Object.prototype);
CAV.Mesh.prototype.update=function(a,b){var c,d,e,f,g;this.geometry.update();if(b)for(c=this.geometry.triangles.length-1;c>=0;c--){d=this.geometry.triangles[c];CAV.Vector4.set(d.color.rgba);for(e=a.length-1;e>=0;e--)f=a[e],CAV.Vector3.subtractVectors(f.ray,f.position,d.centroid),CAV.Vector3.normalise(f.ray),g=CAV.Vector3.dot(d.normal,f.ray),this.side===CAV.FRONT?g=Math.max(g,0):this.side===CAV.BACK?g=Math.abs(Math.min(g,0)):this.side===CAV.DOUBLE&&(g=Math.max(Math.abs(g),0)),CAV.Vector4.multiplyVectors(this.material.slave.rgba,
this.material.ambient.rgba,f.ambient.rgba),CAV.Vector4.add(d.color.rgba,this.material.slave.rgba),CAV.Vector4.multiplyVectors(this.material.slave.rgba,this.material.diffuse.rgba,f.diffuse.rgba),CAV.Vector4.multiplyScalar(this.material.slave.rgba,g),CAV.Vector4.add(d.color.rgba,this.material.slave.rgba);CAV.Vector4.clamp(d.color.rgba,0,1)}return this};CAV.Scene=function(){this.meshes=[];this.lights=[]};
CAV.Scene.prototype={add:function(a){a instanceof CAV.Mesh&&!~this.meshes.indexOf(a)?this.meshes.push(a):a instanceof CAV.Light&&!~this.lights.indexOf(a)&&this.lights.push(a);return this},remove:function(a){a instanceof CAV.Mesh&&~this.meshes.indexOf(a)?this.meshes.splice(this.meshes.indexOf(a),1):a instanceof CAV.Light&&~this.lights.indexOf(a)&&this.lights.splice(this.lights.indexOf(a),1);return this}};CAV.Renderer=function(){this.halfHeight=this.halfWidth=this.height=this.width=0};
CAV.Renderer.prototype={setSize:function(a,b){if(!(this.width===a&&this.height===b))return this.width=a,this.height=b,this.halfWidth=this.width*0.5,this.halfHeight=this.height*0.5,this},clear:function(){return this},render:function(){return this}};CAV.CanvasRenderer=function(){CAV.Renderer.call(this);this.element=document.createElement("canvas");this.element.style.display="block";this.context=this.element.getContext("2d");this.setSize(this.element.width,this.element.height)};
CAV.CanvasRenderer.prototype=Object.create(CAV.Renderer.prototype);CAV.CanvasRenderer.prototype.setSize=function(a,b){CAV.Renderer.prototype.setSize.call(this,a,b);this.element.width=a;this.element.height=b;this.context.setTransform(1,0,0,-1,this.halfWidth,this.halfHeight);return this};CAV.CanvasRenderer.prototype.clear=function(){CAV.Renderer.prototype.clear.call(this);this.context.clearRect(-this.halfWidth,-this.halfHeight,this.width,this.height);return this};
CAV.CanvasRenderer.prototype.render=function(a){CAV.Renderer.prototype.render.call(this,a);var b,c,d,e,f;this.clear();this.context.lineJoin="round";this.context.lineWidth=1;for(b=a.meshes.length-1;b>=0;b--)if(c=a.meshes[b],c.visible){c.update(a.lights,true);for(d=c.geometry.triangles.length-1;d>=0;d--)e=c.geometry.triangles[d],f=e.color.format(),this.context.beginPath(),this.context.moveTo(e.a.position[0],e.a.position[1]),this.context.lineTo(e.b.position[0],e.b.position[1]),this.context.lineTo(e.c.position[0],
e.c.position[1]),this.context.closePath(),this.context.strokeStyle=f,this.context.fillStyle=f,this.context.stroke(),this.context.fill()}return this};


 

使用方法

1.

将以下代码中的 style替换成原有背景图片的CSS CLASS名称。

或者是添加以下内容在合适地方。设置z-index为最底层。

<div id="waibu" style="width: 100%;height: 100%;">
<div id="neibu"></div>
<div id="fshow"></div></div>


2.

颜色切换按钮,放在合适的地方。顶部或底部,按实际调整。

调用

<ul id="bnav"><li></li><li></li><li></li><li></li></ul>



3.在JS文件夹下存放main.js和cav.js


HTML中引用main.js。

冰修改main.js中 js/cav.js 为http访问绝对路径。


例如https://itkz.cn/content/templates/muban/js/cav.js

版权声明:若无特殊注明,本文皆为《 CM部落 》原创,转载请保留文章出处。
本文链接:网站设置QQ官网Canvas[教程] https://itkz.cn/note/qq-canvas.html
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已有3条吐槽

奶沫

2016-01-23 14:15 浙江省移动
不错,我的网站已经用你的教程实现了呢!支持博主,多多发表文章哈!
 Windows 10   Google Chrome 45.0.2454.101

奶沫

2016-01-23 14:10 浙江省移动
网站浏览起来好卡!特别是这个背景图片,加载要花好长时间!
 Windows 10   Google Chrome 45.0.2454.101

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2016-02-01 13:22 江苏省镇江市移动
@奶沫:face 哈哈现在默认没图片了
 Windows XP   TheWorld Browser