PerspectiveTransform实现三维地球自转动画效果代码
代码语言:html
所属分类:三维
代码描述:PerspectiveTransform实现三维地球自转动画效果代码
下面为部分代码预览,完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html> <html lang="en" > <head> <meta charset="UTF-8"> <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Oswald:400'> <style> html, body { position: absolute; width: 100%; height: 100%; margin: 0 0; overflow: hidden; font-family: 'Lato', sans-serif; background-color: #000; color: #fff; } .world { position: absolute; width: 100%; height: 100%; cursor: pointer; cursor: move; cursor: -moz-grab; cursor: -webkit-grab; cursor: grab; } .world-bg { position: absolute; width: 100%; height: 100%; background-position: 50% 50%; background-size: cover; } .world-globe { position: absolute; left: 50%; top: 50%; width: 0; height: 0; } .world-globe-pole { position: absolute; width: 530px; height: 530px; left: -265px; top: -265px; border-radius: 50% 50%; background-color: #fff; } .world-globe-doms-container { position: absolute; left: 50%; top: 50%; width: 0; height: 0; } .world-globe-halo { position: absolute; left: 50%; top: 50%; width: 730px; height: 715px; margin-left: -368px; margin-top: -350px; } .info { position: absolute; left: 0; bottom: 0; width: 100%; padding: 10px 10px; box-sizing: border-box; background-color: rgba(0, 0, 0, 0.8); color: #fff; font-size: 12px; } .info-desc { color: #ddd; font-size: 10px; } a { color: #ff5f5f; } </style> </head> <body > <div class="world"> <div class="world-bg"></div> <div class="world-globe"> <div class="world-globe-pole"></div> <div class="world-globe-doms-container"></div> <div class="world-globe-halo"></div> </div> </div> <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/dat.gui-min.js"></script> <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/stats-min.js"></script> <script> (function (define) { define(function(){ function PerspectiveTransform(element, width, height, useBackFacing){ this.element = element; this.style = element.style; this.computedStyle = window.getComputedStyle(element); this.width = width; this.height = height; this.useBackFacing = !!useBackFacing; this.topLeft = {x: 0, y: 0}; this.topRight = {x: width, y: 0}; this.bottomLeft = {x: 0, y: height}; this.bottomRight = {x: width, y: height}; this.calcStyle = ''; } PerspectiveTransform.useDPRFix = false; PerspectiveTransform.dpr = 1; PerspectiveTransform.prototype = (function(){ var app = { stylePrefix: '' }; var aM = [[0, 0, 1, 0, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 1, 0, 0], [0, 0, 0, 0, 0, 1, 0, 0], [0, 0, 0, 0, 0, 1, 0, 0], [0, 0, 0, 0, 0, 1, 0, 0]]; var bM = [0, 0, 0, 0, 0, 0, 0, 0]; function _setTransformStyleName(){ var testStyle = document.createElement('div').style; app.stylePrefix = 'webkitTransform' in testStyle ? 'webkit' : 'MozTransform' in testStyle ? 'Moz' : 'msTransform' in testStyle ? 'ms' : ''; PerspectiveTransform.transformStyleName = app.stylePrefix + (app.stylePrefix.length>0?'Transform':'transform'); PerspectiveTransform.transformDomStyleName = '-'+app.stylePrefix.toLowerCase()+'-transform'; PerspectiveTransform.transformOriginStyleName = app.stylePrefix + (app.stylePrefix.length>0?'TransformOrigin':'transformOrigin'); PerspectiveTransform.transformOriginDomStyleName = '-'+app.stylePrefix.toLowerCase()+'-transform-origin'; } // Check the distances between each points and if there is some points with the distance lequal to or less than 1 pixel, then return true. Otherwise return false; function _hasDistancesError(){ var lenX = this.topLeft.x - this.topRight.x; var lenY = this.topLeft.y - this.topRight.y; if(Math.sqrt(lenX * lenX + lenY * lenY)<=1) return true; lenX = this.bottomLeft.x - this.bottomRight.x; lenY = this.bottomLeft.y - this.bottomRight.y; if(Math.sqrt(lenX * lenX + lenY * lenY)<=1) return true; lenX = this.topLeft.x - this.bottomLeft.x; lenY = this.topLeft.y - this.bottomLeft.y; if(Math.sqrt(lenX * lenX + lenY * lenY)<=1) return true; lenX = this.topRight.x - this.bottomRight.x; lenY = this.topRight.y - this.bottomRight.y; if( Math.sqrt(lenX * lenX + lenY * lenY)<=1) return true; lenX = this.topLeft.x - this.bottomRight.x; lenY = this.topLeft.y - this.bottomRight.y; if( Math.sqrt(lenX * lenX + lenY * lenY)<=1) return true; lenX = this.topRight.x - this.bottomLeft.x; lenY = this.topRight.y - this.bottomLeft.y; if( Math.sqrt(lenX * lenX + lenY * lenY)<=1) return true; return false; } // Get the determinant of given 3 points function _getDeterminant(p0, p1, p2){ return p0.x * p1.y + p1.x * p2.y + p2.x * p0.y - p0.y * p1.x - p1.y * p2.x - p2.y * p0.x; } // Return true if it is a concave polygon or if it is backfacing when the useBackFacing property is false. Otehrwise return true; function _hasPolyonError(){ var det1 = _getDeterminant(this.topLeft, this.topRight, this.bottomRight); var det2 = _getDeterminant(this.bottomRight, this.bottomLeft, this.topLeft); if(this.useBackFacing){ if(det1*det2<=0) return true; }else{ if(det1<=0||det2<=0) return true; } var det1 = _getDeterminant(this.topRight, this.bottomRight, this.bottomLeft); var det2 = _getDeterminant(this.bottomLeft, this.topLeft, this.topRight); if(this.useBackFacing){ if(det1*det2<=0) return true; }else{ if(det1<=0||det2<=0) return true; } return false; } function checkError(){ if(_hasDistancesError.apply(this)) return 1; // Points are too close to each other. if(_hasPolyonError.apply(this)) return 2; // Concave or backfacing if the useBackFacing property is false return 0; // no error } function calc() { var width = this.width; var height = this.height; // get the offset from the transfrom origin of the element var offsetX = 0; var offsetY = 0; var offset = this.computedStyle.getPropertyValue(PerspectiveTransform.transformOriginDomStyleName); if(offset.indexOf('px')>-1){ offset = offset.split('px'); offsetX = -parseFloat(offset[0]); offsetY = -parseFloat(offset[1]); }else if(offset.indexOf('%')>-1){ offset = offset.split('%'); offsetX = -parseFloat(offset[0]) * width / 100; offsetY = -parseFloat(offset[1]) * height / 100; } // magic here: var dst = [this.topLeft, this.topRight, this.bottomLeft, this.bottomRight]; var arr = [0, 1, 2, 3, 4, 5, 6, 7]; for(var i = 0; i < 4; i++) { aM[i][0] = aM[i+4][3] = i & 1 ? width + offsetX : offsetX; aM[i][1] = aM[i+4][4] = (i > 1 ? height + offsetY : offsetY); aM[i][6] = (i & 1 ? -offsetX-width : -offsetX) * (dst[i].x + offsetX); aM[i][7] = (i > 1 ? -offsetY-height : -offsetY) * (dst[i].x + offsetX); aM[i+4][6] = (i & 1 ? -offsetX-width : -offsetX) * (dst[i].y + offsetY); aM[i+4][7] = (i > 1 ? -offsetY-height : -offsetY) * (dst[i].y + offsetY); bM[i] = (dst[i].x + offsetX); bM[i + 4] = (dst[i].y + offsetY); aM[i][2] = aM[i+4][5] = 1; aM[i][3] = aM[i][4] = aM[i][5] = aM[i+4][0] = aM[i+4][1] = aM[i+4][2] = 0; } var kmax, sum; var row; var col = []; var i, j, k, tmp; for(var j = 0; j < 8; j++) { for(var i = 0; i < 8; i++) col[i] = aM[i][j]; for(i = 0; i < 8; i++) { row = aM[i]; kmax = i<j?i:j; sum = 0.0; for(var k = 0; k < kmax; k++) sum += row[k] * col[k]; row[j] = col[i] -= sum; } var p = j; for(i = j + 1; i < 8; i++) { if(Math.abs(col[i]) > Math.abs(col[p])) p = i; } if(p != j) { for(k = 0; k < 8; k++) { tmp = aM[p][k]; aM[p][k] = aM[j][k]; aM[j][k] = tmp; } tmp = arr[p]; arr[p] = arr[j]; arr[j] = tmp; } if(aM[j][j] != 0.0) for(i = j + 1; i < 8; i++) aM[i][j] /= aM[j][j]; } for(i = 0; i < 8; i++) arr[i] = bM[arr[i]]; for(k = 0; k < 8; k++) { for(i = k + 1; i < 8; i++) arr[i] -= arr[k] * aM[i][k]; } for(k = 7; k > -1; k--) { arr[k] /= aM[k][k]; for(i = 0; i < k; i++) arr[i] -= arr[k] * aM[i][k]; } return this.calcStyle = 'matrix3d(' + arr[0].toFixed(9) + ',' + arr[3].toFixed(9) + ', 0,' + arr[6].toFixed(9) + ',' + arr[1].toFixed(9) + ',' + arr[4].toFixed(9) + ', 0,' + arr[7].toFixed(9) + ',0, 0, 1, 0,' + arr[2].toFixed(9) + ',' + arr[5].toFixed(9) + ', 0, 1)'; } function update(style) { style = style || this.calcStyle; if(PerspectiveTransform.useDPRFix) { var dpr = PerspectiveTransform.dpr; style = 'scale(' + dpr + ',' + dpr + ')perspective(1000px)' + style +.........完整代码请登录后点击上方下载按钮下载查看
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