How to make irregular picture switching special effects in css

This article will explain in detail how to make irregular picture switching effects on css. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

TweenMax irregular picture switching special effects const TWO_PI = Math.PI * 2; var images = [], imageIndex = 0; var image, imageWidth = 768, imageHeight = 485; var vertices = [], indices = [], prevfrag = [], fragments = []; var margin = 50; var container = document.getElementById ('container'); var clickPosition = [imageWidth * 0.5, imageHeight * 0.5] _ window.onload = function () {TweenMax.set (container, {perspective:500}); / / images from http://www.hdwallpapers.in var urls = ['images/1.jpg',' images/2.jpg', 'images/3.jpg',' images/4.jpg'], image, loaded = 0 / / very quick and dirty hack to load and display the first image asap images [0] = image = new Image (); image.onload = function () {if (+ + loaded = 1) {for (var I = 1; I

< 4; i++) { images[i] = image = new Image(); image.src = urls[i]; } placeImage(); } }; image.src = urls[0]; }; function placeImage(transitionIn) { image = images[imageIndex]; if (++imageIndex === images.length) imageIndex = 0; var num = Math.random(); if(num < .25) { image.direction = "left"; } else if(num < .5) { image.direction = "top"; } else if(num < .75) { image.direction = "bottom"; } else { image.direction = "right"; } container.appendChild(image); image.style.opacity = 0; if (transitionIn !== false) { triangulateIn(); }} function triangulateIn(event) { var box = image.getBoundingClientRect(), top = box.top, left = box.left; if(image.direction == "left") { clickPosition[0] = 0; clickPosition[1] = imageHeight / 2; } else if(image.direction == "top") { clickPosition[0] = imageWidth / 2; clickPosition[1] = 0; } else if(image.direction == "bottom") { clickPosition[0] = imageWidth / 2; clickPosition[1] = imageHeight; } else if(image.direction == "right") { clickPosition[0] = imageWidth; clickPosition[1] = imageHeight / 2; } triangulate(); build();} function triangulate() { for(var i = 0; i < 40; i++) { x = -margin + Math.random() * (imageWidth + margin * 2); y = -margin + Math.random() * (imageHeight + margin * 2); vertices.push([x, y]); } vertices.push([0,0]); vertices.push([imageWidth,0]); vertices.push([imageWidth, imageHeight]); vertices.push([0, imageHeight]); vertices.forEach(function(v) { v[0] = clamp(v[0], 0, imageWidth); v[1] = clamp(v[1], 0, imageHeight); }); indices = Delaunay.triangulate(vertices);} function build() { var p0, p1, p2, fragment; var tl0 = new TimelineMax({onComplete:buildCompleteHandler}); for (var i = 0; i < indices.length; i += 3) { p0 = vertices[indices[i + 0]]; p1 = vertices[indices[i + 1]]; p2 = vertices[indices[i + 2]]; fragment = new Fragment(p0, p1, p2); var dx = fragment.centroid[0] - clickPosition[0], dy = fragment.centroid[1] - clickPosition[1], d = Math.sqrt(dx * dx + dy * dy), rx = 30 * sign(dy), ry = 90 * -sign(dx), delay = d * 0.003 * randomRange(0.9, 1.1); fragment.canvas.style.zIndex = Math.floor(d).toString(); var tl1 = new TimelineMax(); if(image.direction == "left") { rx = Math.abs(rx); ry = 0; } else if(image.direction == "top") { rx = 0; ry = Math.abs(ry); } else if(image.direction == "bottom") { rx = 0; ry = - Math.abs(ry); } else if(image.direction == "right") { rx = - Math.abs(rx); ry = 0; } tl1.from(fragment.canvas, 1, { z:-50, rotationX:rx, rotationY:ry, scaleX:0, scaleY:0, ease:Cubic.easeIn }); tl1.from(fragment.canvas, 0.4,{alpha:0}, 0.6); tl0.insert(tl1, delay); fragments.push(fragment); container.appendChild(fragment.canvas); }} function buildCompleteHandler() { // add pooling? image.style.opacity = 1; image.addEventListener('transitionend', function catchTrans() { fragments.forEach(function(f) { container.removeChild(f.canvas); }); fragments.length = 0; vertices.length = 0; indices.length = 0; placeImage(); this.removeEventListener('transitionend',catchTrans,false); }, false); } //////////////// MATH UTILS////////////// function randomRange(min, max) { return min + (max - min) * Math.random();} function clamp(x, min, max) { return x < min ? min : (x >

Max? Max: X);} function sign (x) {return x < 0?-1: 1;} / FRAGMENT/ Fragment = function (v0, v1, v2) {this.v0 = v0; this.v1 = v1; this.v2 = v2; this.computeBoundingBox (); this.computeCentroid (); this.createCanvas (); this.clip ();} Fragment.prototype = {computeBoundingBox:function () {var xMin = Math.min (this.v0 [0], this.v1 [0], this.v2 [0]), xMax = Math.max (this.v0 [0], this.v1 [0], this.v2 [0]), yMin = Math.min (this.v0 [1], this.v1 [1], this.v2 [1]) YMax = Math.max (this.v0 [1], this.v1 [1], this.v2 [1]) This.box = {x:Math.round (xMin), y:Math.round (yMin), w:Math.round (xMax-xMin), h:Math.round (yMax-yMin)} }, computeCentroid:function () {var x = (this.v0 [0] + this.v1 [0] + this.v2 [0]) / 3, y = (this.v0 [1] + this.v1 [1] + this.v2 [1]) / 3; this.centroid = [x, y];}, createCanvas:function () {this.canvas = document.createElement ('canvas') This.canvas.width = this.box.w; this.canvas.height = this.box.h; this.canvas.style.width = this.box.w + 'px'; this.canvas.style.height = this.box.h +' px'; this.canvas.style.left = this.box.x + 'px'; this.canvas.style.top = this.box.y +' px' This.ctx = this.canvas.getContext ('2d');}, clip:function () {this.ctx.save (); this.ctx.translate (- this.box.x,-this.box.y); this.ctx.beginPath (); this.ctx.moveTo (this.v0 [0], this.v0 [1]); this.ctx.lineTo (this.v1 [0], this.v1 [1]) This.ctx.lineTo (this.v2 [0], this.v2 [1]); this.ctx.closePath (); this.ctx.clip (); this.ctx.drawImage (image, 0,0); this.ctx.restore ();}} / / @ sourceURL=pen.js, this is the end of the article on "how to make irregular picture switching effects in css". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.