Падающие листья со снегом на HTML5 + CSS3 + jQuery
Интересный эффект падающих листьев вперемешку со снежинками. Актуально в октябре
Для начала посмотрите ДЕМО
Установка:
1: В самый низ вашего CSS вставьте:
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.leaf0, .leaf1{ position: fixed; background: url("/img/Black_Leaf0.png") no-repeat; background-size: contain; z-index: -500; display: none; -webkit-transform: translate3d(0, 0, 0); -webkit-backface-visibility: hidden; } .leaf1 { position: fixed; background: url("/img/Black_Leaf1.png") no-repeat; background-size: contain; z-index: -500; display: none; -webkit-transform: translate3d(0, 0, 0); -webkit-backface-visibility: hidden; } .snowflake0 { background: url("/img/Snowflake0.png") no-repeat; position: fixed; width: 10px; height: 10px; background-size: contain; z-index: -500; -webkit-transform: translate3d(0, 0, 0); -webkit-backface-visibility: hidden; } .tree { visibility: hidden; position: fixed; top: 15vh; left: 2vw; height: 25vh; width: 22vw; background: red; } .sky { visibility: hidden; position: fixed; top: 0; left: 0; height: 10vh; width: 100vw; background: skyblue; } |
2#: После открывающего тега <body> вствьте:
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<script type="text/javascript"> window.addEventListener('load', function () { let numLeaves = 60; let numSnow = 50; let curLeaves = 0; let curSnow = 0; let didScroll = false; function scrolled() { didScroll = true; window.removeEventListener("scroll", scrolled); } window.addEventListener("scroll", scrolled); let wait = 800; setInterval(function() { if(didScroll) { didScroll = false; let cur = (document.documentElement.scrollTop || document.body.scrollTop); let loc = cur / ((document.documentElement.scrollHeight || document.body.scrollHeight) - window.innerHeight) * 100; if (loc < 25) { numLeaves = 60; numSnow = 0; wait = 800; } else if (loc < 50) { numLeaves = 100; numSnow = 20; wait = 500; } else if (loc < 75) { numLeaves = 20; numSnow = 110; wait = 300; } else { numLeaves = 35; numSnow = 25; wait = 1000; } window.addEventListener("scroll", scrolled); } }, 750); /* PROCEDURE TO CONTROL BACKGROUND ANIMATIONS */ let height = document.documentElement.clientHeight; let width = Math.max( document.documentElement.clientWidth, document.body.scrollWidth, document.documentElement.scrollWidth, document.body.offsetWidth, document.documentElement.offsetWidth ); window.addEventListener("resize", function () { height = document.documentElement.clientHeight; width = Math.max( document.documentElement.clientWidth, document.body.scrollWidth, document.documentElement.scrollWidth, document.body.offsetWidth, document.documentElement.offsetWidth ); }); let dir = []; let speed = []; let grav = []; let wind = []; let rot = []; let delta = []; function createChild(parent, childName) { let bound = parent.getBoundingClientRect(); let startX = ((Math.random() * (bound.right - bound.left)) + bound.left) + "px"; let startY = ((Math.random() * (bound.bottom - bound.top)) + bound.top) + "px"; let newChild = document.createElement("div"); newChild.style.top = startY; newChild.style.left = startX; newChild.style.transform = randomRotate(); let z = newChild.style.transform.split(" ")[2].replace("rotateZ(", "").replace("deg)", ""); grav.push(Math.random() / 6 + 0.3); speed.push(Math.random() / 6 + 1); if (childName === "leaf") { wind.push(Math.random() / 4 + 0.5); newChild.className = childName + Math.floor(Math.random() * 2); let random = Math.random() * 15; newChild.style.width = (60 - random) + "px"; newChild.style.height = (60 - random) + "px"; } else { wind.push(0.2); newChild.className = childName + Math.floor(Math.random()); let random = Math.random() * 5; newChild.style.width = (10 - random) + "px"; newChild.style.height = (10 - random) + "px"; } rot.push(Math.random() / 4 + 0.4); delta.push(Math.random() * 40 - 20); if (z < 90) { dir.push(-1); } else { dir.push(1); } document.getElementsByClassName("container")[0].appendChild(newChild); $(newChild).fadeIn("slow"); } function randomRotate() { let x = Math.random() * 10; let y = Math.random() * 30 - 15; let z = Math.random() * 180; return "rotateX(" + x + "deg) rotateY(" + y + "deg) rotateZ(" + z + "deg)"; } //Animates the children of a given parent to fall function animate(parent) { if (curLeaves < numLeaves) { let bound = (numLeaves - curLeaves); for (let i = 0; i < bound; i++) { setTimeout(function () { createChild(document.getElementsByClassName("tree")[0], "leaf"); }, (wait * i)); curLeaves++; } } if (curSnow < numSnow) { let bound = (numSnow - curSnow); for (let i = 0; i < bound; i++) { setTimeout(function () { createChild(document.getElementsByClassName("sky")[0], "snowflake"); }, ((wait + 100) * i)); curSnow++; } } for (let i = 0; i < parent.children.length; i++) { let child = parent.children[i]; let z = child.style.transform.split(" ")[2].replace("rotateZ(", "").replace("deg)", ""); let dx = speed[i]; let dy = Math.random() * 2 * Math.abs(Math.cos(z * Math.PI / 180)); if (child.className.indexOf("leaf") >= 0) { child.style.top = (child.style.top.replace("px", "") - (0.2 * Math.sin(z / 180 * Math.PI)) + grav[i] + "px"); } else { child.style.top = (child.style.top.replace("px", "") - 0 + grav[i] + "px"); } child.style.left = (child.style.left.replace("px", "") - 0 - (0.1 * Math.sin(z / 180 * Math.PI)) + (dir[i] * speed[i] * 1.5) + wind[i]) + "px"; if ((child.style.top.replace("px", "") - 0 + dy) > height || (child.style.left.replace("px", "") - 0 + dx) > width || (child.style.left.replace("px", "") - 0 + dx) < -100) { parent.removeChild(child); dir.splice(i, 1); speed.splice(i, 1); wind.splice(i, 1); grav.splice(i, 1); rot.splice(i, 1); delta.splice(i, 1); if (child.className.indexOf("leaf") >= 0) { curLeaves--; } else { curSnow--; } i--; } else { if (z >= 92 && dir[i] === -1) { if (speed[i] > 0) { speed[i] -= speed[i] / 50; } } else if (z >= 100 && dir[i] === 1) { if (speed[i] < 1.1) { speed[i] += 0.02; } } else if (z <= 80 && dir[i] === -1) { if (speed[i] < 1.1) { speed[i] += 0.03; } } else if (z <= 88 && dir[i] === 1) { if (speed[i] > 0) { speed[i] -= speed[i] / 50; } } if (z <= 92 && z >= 88) { speed[i] = 1 + (Math.random() / 4); } if ((z <= 140 && dir[i] === -1 && speed[i] > 0.22) || (z >= 20 && dir[i] === 1 && speed[i] > 0.22)) { z = z - (dir[i] * rot[i]); } if (z >= 110 && speed[i] <= 0.2 && dir[i] === -1) { dir[i] = 1; } else if (z < 70 && speed[i] <= 0.2 && dir[i] === 1) { dir[i] = -1; } let x = child.style.transform.split(" ")[0].replace("rotateX(", "").replace("deg)", ""); if (x > 0 + delta[i] && dir[i] === -1) { x = x - Math.random() / 2; } else if (x < 40 + delta[i] && dir[i] === 1) { x = x - 0 + Math.random() / 2; } let y = child.style.transform.split(" ")[1].replace("rotateY(", "").replace("deg)", ""); if (y > 0 + delta[i] && dir[i] === -1) { y = y - Math.random() / 2; } else if (y < 40 + delta[i] && dir[i] === 1) { y = y - 0 + Math.random() / 2; } child.style.transform = "rotateX(" + x + "deg) rotateY(" + y + "deg) rotateZ(" + z + "deg)"; } } } setInterval(function () { animate(document.getElementsByClassName("container")[0]); }, 10); /* END OF PROCEDURE */ }, false); </script> |
Осталось лишь залить все картинки из прикреплённого архива в папку img
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