[基于HTML5的动态数据3D网页的需求规格说明书=.docxVIP

[基于HTML5的动态数据3D网页的需求规格说明书=.docx

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[基于HTML5的动态数据3D网页的需求规格说明书=

基于HTML5的动态数据3D网页的需求规格说明书htmlheadmeta http-equiv=Content-Type content=text/html; charset=UTF-8 titleCanvas sphere/title scriptSphere = (function() {var canvas;var ctx;var offsetX = 300;var offsetY = 300;var objectsInScene = new Array();var focalLength = 300;var cameraView = {x:0, y:0, z:0, rotX:0, rotY:0, rotZ:0};var space = 15;var PI = Math.PI;var radius = 200;var radian = PI/180;var mouseX = 0;var mouseY = 0;var objectRadius = 14;var scaleRatio = 0;var scaling = true;var nrOfFollowers = 32;var followRadius = 8;var minDistToLeader = 20;var sx = 0;var cx = 0;var sy = 0;var cy = 0;var sz = 0;var cz = 0;return function() {this.createSphere = function() {canvas = document.getElementById(sphere);ctx = canvas.getContext(2d);if (canvas.getContext) {this.init();}}this.init = function() {// create sphere objects:for (var i=space; i180; i+=space) {for (var angle=0; angle360; angle+=space) {var object = {};var x = Math.sin(radian*i)*radius;object.x = Math.cos(angle*radian)*x;object.y = Math.cos(radian*i)*radius;object.z = Math.sin(angle*radian)*x;object.glow = .5;object.type = sphere;objectsInScene.push(object);}}// create followers:for(var i=0; inrOfFollowers; i++) {var object = {};object.x = 0;object.y = 0;object.z = 0;object.momentumx = 0;object.momentumy = 0;object.momentumz = 0;var leader;this.assignLeader(object);object.type = follow;objectsInScene.push(object);}canvas.addEventListener(mousemove, this.setMouseXY, false);document.captureEvents(Event.MOUSEDOWN);document.onmousedown = this.toggleScaling;setInterval(this.runtime, 40, this);}// assign leader to follower:this.assignLeader = function(obj) {var leader;while(!leader || obj.leader.type != sphere) {leader = objectsInScene[Math.floor(Math.random()*objectsInScene.length)];obj.leader = leader;}}// retrieve mouse position from canvas:this.setMouseXY = function(e) {mouseX = e.layerX - offsetX - canvas.offsetLeft;mouseY = e.layerY - offsetY - canvas.offsetTop;}this.toggleScaling = function(e) {if(scaling) {scaling = fals

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