97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
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// Cool snow that was TOTALLY NOT stolen from someone else :-)
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// Amount of Snowflakes
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var snowMax = 64;
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// Snowflake Colours
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var snowColor = ["#fff"];
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// Snow Entity
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var snowEntity = "*";
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// Falling Velocity
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var snowSpeed = 0.75;
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// Minimum Flake Size
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var snowMinSize = 16;
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// Maximum Flake Size
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var snowMaxSize = 32;
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// Refresh Rate (in milliseconds)
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var snowRefresh = 75;
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// Additional Styles
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var snowStyles = "z-index: 0; cursor: default; user-select: none;";
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/*
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// End of Configuration
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// ----------------------------------------
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// Do not modify the code below this line
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*/
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var snow = [],
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pos = [],
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coords = [],
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lefr = [],
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marginBottom,
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marginRight;
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function randomise(range) {
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rand = Math.floor(range * Math.random());
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return rand;
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}
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function initSnow() {
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var snowSize = snowMaxSize - snowMinSize;
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marginBottom = document.body.scrollHeight - 5;
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marginRight = document.body.clientWidth - 15;
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for (i = 0; i <= snowMax; i++) {
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coords[i] = 0;
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lefr[i] = Math.random() * 15;
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pos[i] = 0.03 + Math.random() / 10;
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snow[i] = document.getElementById("flake" + i);
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snow[i].style.fontFamily = "inherit";
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snow[i].size = randomise(snowSize) + snowMinSize;
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snow[i].style.fontSize = snow[i].size + "px";
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snow[i].style.color = snowColor[randomise(snowColor.length)];
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snow[i].style.zIndex = -1;
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snow[i].sink = snowSpeed * snow[i].size / 5;
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snow[i].posX = randomise(marginRight - snow[i].size);
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snow[i].posY = randomise(2 * marginBottom - marginBottom - 2 * snow[i].size);
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snow[i].style.left = snow[i].posX + "px";
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snow[i].style.top = snow[i].posY + "px";
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}
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moveSnow();
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}
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function resize() {
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marginBottom = document.body.scrollHeight - 5;
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marginRight = document.body.clientWidth - 15;
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}
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function moveSnow() {
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for (i = 0; i <= snowMax; i++) {
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coords[i] += pos[i];
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snow[i].posY += snow[i].sink;
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snow[i].style.left = snow[i].posX + lefr[i] * Math.sin(coords[i]) + "px";
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snow[i].style.top = snow[i].posY + "px";
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if (snow[i].posY >= marginBottom - 2 * snow[i].size || parseInt(snow[i].style.left) > (marginRight - 3 * lefr[i])) {
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snow[i].posX = randomise(marginRight - snow[i].size);
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snow[i].posY = 0;
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}
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}
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setTimeout("moveSnow()", snowRefresh);
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}
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for (i = 0; i <= snowMax; i++) {
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document.write("<span id='flake" + i + "' style='" + snowStyles + "position:absolute;top:-" + snowMaxSize + "'>" + snowEntity + "</span>");
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}
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window.addEventListener('resize', resize);
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window.addEventListener('load', initSnow); |