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fix: fireworks & snow improvements

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xHyroM 2023-04-01 12:05:47 +02:00
parent e634f07d3e
commit 8b882691d2
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4 changed files with 369 additions and 316 deletions
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3
src/components/widgets/Fireworks.astro
View file

@ -1,3 +1,6 @@
<div class="fireworks-container absolute top-0 left-0 z-[-1000] h-full w-full">
</div>
<script> <script>
import { Fireworks } from "fireworks-js"; import { Fireworks } from "fireworks-js";

2
src/components/widgets/Snow.astro
View file

@ -1,3 +1,5 @@
<div class="snow-container absolute top-0 left-0 z-[-1000] h-full w-full"></div>
<script> <script>
import "../../scripts/snow.js"; import "../../scripts/snow.js";
</script> </script>

5
src/layouts/Layout.astro
View file

@ -23,10 +23,7 @@ const Head = head || DefaultHead;
</head> </head>
<body class="overflow-x-hidden bg-dark font-sans"> <body class="overflow-x-hidden bg-dark font-sans">
<slot /> <slot />
<div
class="fireworks-container absolute top-0 left-0 z-[-1000] h-full w-full"
>
</div>
<script> <script>
import "../scripts/menu.js"; import "../scripts/menu.js";
</script> </script>

557
src/scripts/snow.js
View file

@ -12,68 +12,73 @@
/*global window, document, navigator, clearInterval, setInterval */ /*global window, document, navigator, clearInterval, setInterval */
class SnowStorm { class SnowStorm {
constructor() { constructor() {
// --- common properties --- // --- common properties ---
this.autoStart = true; // Whether the snow should start automatically or not. this.autoStart = true; // Whether the snow should start automatically or not.
this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) Enable at your own risk. this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) Enable at your own risk.
this.flakesMax = 128; // Limit total amount of snow made (falling + sticking) this.flakesMax = 128; // Limit total amount of snow made (falling + sticking)
this.flakesMaxActive = 64; // Limit amount of snow falling at once (less = lower CPU use) this.flakesMaxActive = 64; // Limit amount of snow falling at once (less = lower CPU use)
this.animationInterval = 50; // Theoretical "miliseconds per frame" measurement. 20 = fast + smooth, but high CPU use. 50 = more conservative, but slower this.animationInterval = 50; // Theoretical "miliseconds per frame" measurement. 20 = fast + smooth, but high CPU use. 50 = more conservative, but slower
this.useGPU = true; // Enable transform-based hardware acceleration, reduce CPU load. this.useGPU = true; // Enable transform-based hardware acceleration, reduce CPU load.
this.className = null; // CSS class name for further customization on snow elements this.className = null; // CSS class name for further customization on snow elements
this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice. this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice.
this.flakeBottom = null; // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect this.flakeBottom = null; // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect
this.followMouse = false; // Snow movement can respond to the user's mouse this.followMouse = false; // Snow movement can respond to the user's mouse
this.snowColor = '#fff'; // Don't eat (or use?) yellow snow. this.snowColor = "#fff"; // Don't eat (or use?) yellow snow.
this.snowCharacter = '&bull;'; // &bull; = bullet, &middot; is square on some systems etc. this.snowCharacter = "&bull;"; // &bull; = bullet, &middot; is square on some systems etc.
this.snowStick = true; // Whether or not snow should "stick" at the bottom. When off, will never collect. this.snowStick = true; // Whether or not snow should "stick" at the bottom. When off, will never collect.
this.targetElement = null; // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference this.targetElement = null; // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference
this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it
this.useTwinkleEffect = false; // Allow snow to randomly "flicker" in and out of view while falling this.useTwinkleEffect = false; // Allow snow to randomly "flicker" in and out of view while falling
this.usePositionFixed = false; // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported this.usePositionFixed = false; // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported
this.usePixelPosition = false; // Whether to use pixel values for snow top/left vs. percentages. Auto-enabled if body is position:relative or targetElement is specified. this.usePixelPosition = false; // Whether to use pixel values for snow top/left vs. percentages. Auto-enabled if body is position:relative or targetElement is specified.
// --- less-used bits --- // --- less-used bits ---
this.freezeOnBlur = true; // Only snow when the window is in focus (foreground.) Saves CPU. this.freezeOnBlur = true; // Only snow when the window is in focus (foreground.) Saves CPU.
this.flakeLeftOffset = 0; // Left margin/gutter space on edge of container (eg. browser window.) Bump up these values if seeing horizontal scrollbars. this.flakeLeftOffset = 0; // Left margin/gutter space on edge of container (eg. browser window.) Bump up these values if seeing horizontal scrollbars.
this.flakeRightOffset = 0; // Right margin/gutter space on edge of container this.flakeRightOffset = 0; // Right margin/gutter space on edge of container
this.flakeWidth = 8; // Max pixel width reserved for snow element this.flakeWidth = 8; // Max pixel width reserved for snow element
this.flakeHeight = 8; // Max pixel height reserved for snow element this.flakeHeight = 8; // Max pixel height reserved for snow element
this.vMaxX = 5; // Maximum X velocity range for snow this.vMaxX = 5; // Maximum X velocity range for snow
this.vMaxY = 4; // Maximum Y velocity range for snow this.vMaxY = 4; // Maximum Y velocity range for snow
this.zIndex = 0; // CSS stacking order applied to each snowflake this.zIndex = 0; // CSS stacking order applied to each snowflake
// --- "No user-serviceable parts inside" past this point, yadda yadda --- // --- "No user-serviceable parts inside" past this point, yadda yadda ---
var storm = this, var storm = this,
features, features,
// UA sniffing and backCompat rendering mode checks for fixed position, etc. // UA sniffing and backCompat rendering mode checks for fixed position, etc.
isIE = navigator.userAgent.match(/msie/i), isIE = navigator.userAgent.match(/msie/i),
isIE6 = navigator.userAgent.match(/msie 6/i), isIE6 = navigator.userAgent.match(/msie 6/i),
isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i), isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i),
isBackCompatIE = (isIE && document.compatMode === 'BackCompat'), isBackCompatIE = isIE && document.compatMode === "BackCompat",
noFixed = (isBackCompatIE || isIE6), noFixed = isBackCompatIE || isIE6,
screenX = null, screenX2 = null, screenY = null, scrollY = null, docHeight = null, vRndX = null, vRndY = null, screenX = null,
windOffset = 1, screenX2 = null,
windMultiplier = 2, screenY = null,
flakeTypes = 6, scrollY = null,
fixedForEverything = false, docHeight = null,
targetElementIsRelative = false, vRndX = null,
opacitySupported = (function(){ vRndY = null,
try { windOffset = 1,
document.createElement('div').style.opacity = '0.5'; windMultiplier = 2,
} catch(e) { flakeTypes = 6,
return false; fixedForEverything = false,
} targetElementIsRelative = false,
return true; opacitySupported = (function () {
}()), try {
didInit = false, document.createElement("div").style.opacity = "0.5";
docFrag = document.createDocumentFragment(); } catch (e) {
return false;
features = (function() { }
return true;
})(),
didInit = false,
docFrag = document.createDocumentFragment();
features = (function () {
var getAnimationFrame; var getAnimationFrame;
/** /**
@ -83,62 +88,59 @@ class SnowStorm {
*/ */
function timeoutShim(callback) { function timeoutShim(callback) {
window.setTimeout(callback, 1000/(storm.animationInterval || 20)); window.setTimeout(callback, 1000 / (storm.animationInterval || 20));
} }
var _animationFrame = (window.requestAnimationFrame || var _animationFrame =
window.webkitRequestAnimationFrame || window.requestAnimationFrame ||
window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame ||
window.oRequestAnimationFrame || window.mozRequestAnimationFrame ||
window.msRequestAnimationFrame || window.oRequestAnimationFrame ||
timeoutShim); window.msRequestAnimationFrame ||
timeoutShim;
// apply to window, avoid "illegal invocation" errors in Chrome // apply to window, avoid "illegal invocation" errors in Chrome
getAnimationFrame = _animationFrame ? function() { getAnimationFrame = _animationFrame
return _animationFrame.apply(window, arguments); ? function () {
} : null; return _animationFrame.apply(window, arguments);
}
: null;
var testDiv; var testDiv;
testDiv = document.createElement('div'); testDiv = document.createElement("div");
function has(prop) { function has(prop) {
// test for feature support // test for feature support
var result = testDiv.style[prop]; var result = testDiv.style[prop];
return (result !== undefined ? prop : null); return result !== undefined ? prop : null;
} }
// note local scope. // note local scope.
var localFeatures = { var localFeatures = {
transform: { transform: {
ie: has('-ms-transform'), ie: has("-ms-transform"),
moz: has('MozTransform'), moz: has("MozTransform"),
opera: has('OTransform'), opera: has("OTransform"),
webkit: has('webkitTransform'), webkit: has("webkitTransform"),
w3: has('transform'), w3: has("transform"),
prop: null // the normalized property value prop: null, // the normalized property value
}, },
getAnimationFrame: getAnimationFrame getAnimationFrame: getAnimationFrame,
}; };
localFeatures.transform.prop = ( localFeatures.transform.prop =
localFeatures.transform.w3 || localFeatures.transform.w3 ||
localFeatures.transform.moz || localFeatures.transform.moz ||
localFeatures.transform.webkit || localFeatures.transform.webkit ||
localFeatures.transform.ie || localFeatures.transform.ie ||
localFeatures.transform.opera localFeatures.transform.opera;
);
testDiv = null; testDiv = null;
return localFeatures; return localFeatures;
})();
}());
this.timer = null; this.timer = null;
this.flakes = []; this.flakes = [];
@ -147,55 +149,44 @@ class SnowStorm {
this.meltFrameCount = 20; this.meltFrameCount = 20;
this.meltFrames = []; this.meltFrames = [];
this.setXY = function(o, x, y) { this.setXY = function (o, x, y) {
if (!o) { if (!o) {
return false; return false;
} }
if (storm.usePixelPosition || targetElementIsRelative) { if (storm.usePixelPosition || targetElementIsRelative) {
o.style.left = x - storm.flakeWidth + "px";
o.style.left = (x - storm.flakeWidth) + 'px'; o.style.top = y - storm.flakeHeight + "px";
o.style.top = (y - storm.flakeHeight) + 'px';
} else if (noFixed) { } else if (noFixed) {
o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.right = (100-(x/screenX*100)) + '%';
// avoid creating vertical scrollbars // avoid creating vertical scrollbars
o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px'; o.style.top = Math.min(y, docHeight - storm.flakeHeight) + "px";
} else { } else {
if (!storm.flakeBottom) { if (!storm.flakeBottom) {
// if not using a fixed bottom coordinate... // if not using a fixed bottom coordinate...
o.style.right = (100-(x/screenX*100)) + '%'; o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.bottom = (100-(y/screenY*100)) + '%'; o.style.bottom = 100 - (y / screenY) * 100 + "%";
} else { } else {
// absolute top. // absolute top.
o.style.right = (100-(x/screenX*100)) + '%'; o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px'; o.style.top = Math.min(y, docHeight - storm.flakeHeight) + "px";
} }
} }
}; };
this.events = (function() { this.events = (function () {
var old = !window.addEventListener && window.attachEvent,
var old = (!window.addEventListener && window.attachEvent), slice = Array.prototype.slice, slice = Array.prototype.slice,
evt = { evt = {
add: (old?'attachEvent':'addEventListener'), add: old ? "attachEvent" : "addEventListener",
remove: (old?'detachEvent':'removeEventListener') remove: old ? "detachEvent" : "removeEventListener",
}; };
function getArgs(oArgs) { function getArgs(oArgs) {
var args = slice.call(oArgs), len = args.length; var args = slice.call(oArgs),
len = args.length;
if (old) { if (old) {
args[1] = 'on' + args[1]; // prefix args[1] = "on" + args[1]; // prefix
if (len > 3) { if (len > 3) {
args.pop(); // no capture args.pop(); // no capture
} }
@ -207,7 +198,7 @@ class SnowStorm {
function apply(args, sType) { function apply(args, sType) {
var element = args.shift(), var element = args.shift(),
method = [evt[sType]]; method = [evt[sType]];
if (old) { if (old) {
element[method](args[0], args[1]); element[method](args[0], args[1]);
} else { } else {
@ -216,37 +207,36 @@ class SnowStorm {
} }
function addEvent() { function addEvent() {
apply(getArgs(arguments), 'add'); apply(getArgs(arguments), "add");
} }
function removeEvent() { function removeEvent() {
apply(getArgs(arguments), 'remove'); apply(getArgs(arguments), "remove");
} }
return { return {
add: addEvent, add: addEvent,
remove: removeEvent remove: removeEvent,
}; };
})();
}()); function rnd(n, min) {
function rnd(n,min) {
if (isNaN(min)) { if (isNaN(min)) {
min = 0; min = 0;
} }
return (Math.random()*n)+min; return Math.random() * n + min;
} }
function plusMinus(n) { function plusMinus(n) {
return (parseInt(rnd(2),10)===1?n*-1:n); return parseInt(rnd(2), 10) === 1 ? n * -1 : n;
} }
this.randomizeWind = function() { this.randomizeWind = function () {
var i; var i;
vRndX = plusMinus(rnd(storm.vMaxX,0.2)); vRndX = plusMinus(rnd(storm.vMaxX, 0.2));
vRndY = rnd(storm.vMaxY,0.2); vRndY = rnd(storm.vMaxY, 0.2);
if (this.flakes) { if (this.flakes) {
for (i=0; i<this.flakes.length; i++) { for (i = 0; i < this.flakes.length; i++) {
if (this.flakes[i].active) { if (this.flakes[i].active) {
this.flakes[i].setVelocities(); this.flakes[i].setVelocities();
} }
@ -254,15 +244,22 @@ class SnowStorm {
} }
}; };
this.scrollHandler = function() { this.scrollHandler = function () {
var i; var i;
// "attach" snowflakes to bottom of window if no absolute bottom value was given // "attach" snowflakes to bottom of window if no absolute bottom value was given
scrollY = (storm.flakeBottom ? 0 : parseInt(window.scrollY || document.documentElement.scrollTop || (noFixed ? document.body.scrollTop : 0), 10)); scrollY = storm.flakeBottom
? 0
: parseInt(
window.scrollY ||
document.documentElement.scrollTop ||
(noFixed ? document.body.scrollTop : 0),
10
);
if (isNaN(scrollY)) { if (isNaN(scrollY)) {
scrollY = 0; // Netscape 6 scroll fix scrollY = 0; // Netscape 6 scroll fix
} }
if (!fixedForEverything && !storm.flakeBottom && storm.flakes) { if (!fixedForEverything && !storm.flakeBottom && storm.flakes) {
for (i=0; i<storm.flakes.length; i++) { for (i = 0; i < storm.flakes.length; i++) {
if (storm.flakes[i].active === 0) { if (storm.flakes[i].active === 0) {
storm.flakes[i].stick(); storm.flakes[i].stick();
} }
@ -270,26 +267,35 @@ class SnowStorm {
} }
}; };
this.resizeHandler = function() { this.resizeHandler = function () {
if (window.innerWidth || window.innerHeight) { if (window.innerWidth || window.innerHeight) {
screenX = window.innerWidth - 16 - storm.flakeRightOffset; screenX = window.innerWidth - 16 - storm.flakeRightOffset;
screenY = (storm.flakeBottom || window.innerHeight); screenY = storm.flakeBottom || window.innerHeight;
} else { } else {
screenX = (document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth) - (!isIE ? 8 : 0) - storm.flakeRightOffset; screenX =
screenY = storm.flakeBottom || document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight; (document.documentElement.clientWidth ||
document.body.clientWidth ||
document.body.scrollWidth) -
(!isIE ? 8 : 0) -
storm.flakeRightOffset;
screenY =
storm.flakeBottom ||
document.documentElement.clientHeight ||
document.body.clientHeight ||
document.body.scrollHeight;
} }
docHeight = document.body.offsetHeight; docHeight = document.body.offsetHeight;
screenX2 = parseInt(screenX/2,10); screenX2 = parseInt(screenX / 2, 10);
}; };
this.resizeHandlerAlt = function() { this.resizeHandlerAlt = function () {
screenX = storm.targetElement.offsetWidth - storm.flakeRightOffset; screenX = storm.targetElement.offsetWidth - storm.flakeRightOffset;
screenY = storm.flakeBottom || storm.targetElement.offsetHeight; screenY = storm.flakeBottom || storm.targetElement.offsetHeight;
screenX2 = parseInt(screenX/2,10); screenX2 = parseInt(screenX / 2, 10);
docHeight = document.body.offsetHeight; docHeight = document.body.offsetHeight;
}; };
this.freeze = function() { this.freeze = function () {
// pause animation // pause animation
if (!storm.disabled) { if (!storm.disabled) {
storm.disabled = 1; storm.disabled = 1;
@ -299,16 +305,16 @@ class SnowStorm {
storm.timer = null; storm.timer = null;
}; };
this.resume = function() { this.resume = function () {
if (storm.disabled) { if (storm.disabled) {
storm.disabled = 0; storm.disabled = 0;
} else { } else {
return false; return false;
} }
storm.timerInit(); storm.timerInit();
}; };
this.toggleSnow = function() { this.toggleSnow = function () {
if (!storm.flakes.length) { if (!storm.flakes.length) {
// first run // first run
storm.start(); storm.start();
@ -324,40 +330,40 @@ class SnowStorm {
} }
}; };
this.stop = function() { this.stop = function () {
var i; var i;
this.freeze(); this.freeze();
for (i=0; i<this.flakes.length; i++) { for (i = 0; i < this.flakes.length; i++) {
this.flakes[i].o.style.display = 'none'; this.flakes[i].o.style.display = "none";
} }
storm.events.remove(window,'scroll',storm.scrollHandler); storm.events.remove(window, "scroll", storm.scrollHandler);
storm.events.remove(window,'resize',storm.resizeHandler); storm.events.remove(window, "resize", storm.resizeHandler);
if (storm.freezeOnBlur) { if (storm.freezeOnBlur) {
if (isIE) { if (isIE) {
storm.events.remove(document,'focusout',storm.freeze); storm.events.remove(document, "focusout", storm.freeze);
storm.events.remove(document,'focusin',storm.resume); storm.events.remove(document, "focusin", storm.resume);
} else { } else {
storm.events.remove(window,'blur',storm.freeze); storm.events.remove(window, "blur", storm.freeze);
storm.events.remove(window,'focus',storm.resume); storm.events.remove(window, "focus", storm.resume);
} }
} }
}; };
this.show = function() { this.show = function () {
var i; var i;
for (i=0; i<this.flakes.length; i++) { for (i = 0; i < this.flakes.length; i++) {
this.flakes[i].o.style.display = 'block'; this.flakes[i].o.style.display = "block";
} }
}; };
this.SnowFlake = function(type,x,y) { this.SnowFlake = function (type, x, y) {
var s = this; var s = this;
this.type = type; this.type = type;
this.x = x||parseInt(rnd(screenX-20),10); this.x = x || parseInt(rnd(screenX - 20), 10);
this.y = (!isNaN(y)?y:-rnd(screenY)-12); this.y = !isNaN(y) ? y : -rnd(screenY) - 12;
this.vX = null; this.vX = null;
this.vY = null; this.vY = null;
this.vAmpTypes = [1,1.2,1.4,1.6,1.8]; // "amplification" for vX/vY (based on flake size/type) this.vAmpTypes = [1, 1.2, 1.4, 1.6, 1.8]; // "amplification" for vX/vY (based on flake size/type)
this.vAmp = this.vAmpTypes[this.type] || 1; this.vAmp = this.vAmpTypes[this.type] || 1;
this.melting = false; this.melting = false;
this.meltFrameCount = storm.meltFrameCount; this.meltFrameCount = storm.meltFrameCount;
@ -365,28 +371,28 @@ class SnowStorm {
this.meltFrame = 0; this.meltFrame = 0;
this.twinkleFrame = 0; this.twinkleFrame = 0;
this.active = 1; this.active = 1;
this.fontSize = (10+(this.type/5)*10); this.fontSize = 10 + (this.type / 5) * 10;
this.o = document.createElement('div'); this.o = document.createElement("div");
this.o.innerHTML = storm.snowCharacter; this.o.innerHTML = storm.snowCharacter;
if (storm.className) { if (storm.className) {
this.o.setAttribute('class', storm.className); this.o.setAttribute("class", storm.className);
} }
this.o.style.color = storm.snowColor; this.o.style.color = storm.snowColor;
this.o.style.position = (fixedForEverything?'fixed':'absolute'); this.o.style.position = fixedForEverything ? "fixed" : "absolute";
if (storm.useGPU && features.transform.prop) { if (storm.useGPU && features.transform.prop) {
// GPU-accelerated snow. // GPU-accelerated snow.
this.o.style[features.transform.prop] = 'translate3d(0px, 0px, 0px)'; this.o.style[features.transform.prop] = "translate3d(0px, 0px, 0px)";
} }
this.o.style.width = storm.flakeWidth+'px'; this.o.style.width = storm.flakeWidth + "px";
this.o.style.height = storm.flakeHeight+'px'; this.o.style.height = storm.flakeHeight + "px";
this.o.style.fontFamily = 'arial,verdana'; this.o.style.fontFamily = "arial,verdana";
this.o.style.cursor = 'default'; this.o.style.cursor = "default";
this.o.style.overflow = 'hidden'; this.o.style.overflow = "hidden";
this.o.style.fontWeight = 'normal'; this.o.style.fontWeight = "normal";
this.o.style.zIndex = storm.zIndex; this.o.style.zIndex = storm.zIndex;
docFrag.appendChild(this.o); docFrag.appendChild(this.o);
this.refresh = function() { this.refresh = function () {
if (isNaN(s.x) || isNaN(s.y)) { if (isNaN(s.x) || isNaN(s.y)) {
// safety check // safety check
return false; return false;
@ -394,42 +400,48 @@ class SnowStorm {
storm.setXY(s.o, s.x, s.y); storm.setXY(s.o, s.x, s.y);
}; };
this.stick = function() { this.stick = function () {
if (noFixed || (storm.targetElement !== document.documentElement && storm.targetElement !== document.body)) { if (
s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px'; noFixed ||
(storm.targetElement !== document.documentElement &&
storm.targetElement !== document.body)
) {
s.o.style.top = screenY + scrollY - storm.flakeHeight + "px";
} else if (storm.flakeBottom) { } else if (storm.flakeBottom) {
s.o.style.top = storm.flakeBottom+'px'; s.o.style.top = storm.flakeBottom + "px";
} else { } else {
s.o.style.display = 'none'; s.o.style.display = "none";
s.o.style.bottom = '0%'; s.o.style.bottom = "0%";
s.o.style.position = 'fixed'; s.o.style.position = "fixed";
s.o.style.display = 'block'; s.o.style.display = "block";
} }
}; };
this.vCheck = function() { this.vCheck = function () {
if (s.vX>=0 && s.vX<0.2) { if (s.vX >= 0 && s.vX < 0.2) {
s.vX = 0.2; s.vX = 0.2;
} else if (s.vX<0 && s.vX>-0.2) { } else if (s.vX < 0 && s.vX > -0.2) {
s.vX = -0.2; s.vX = -0.2;
} }
if (s.vY>=0 && s.vY<0.2) { if (s.vY >= 0 && s.vY < 0.2) {
s.vY = 0.2; s.vY = 0.2;
} }
}; };
this.move = function() { this.move = function () {
var vX = s.vX*windOffset, yDiff; var vX = s.vX * windOffset,
yDiff;
s.x += vX; s.x += vX;
s.y += (s.vY*s.vAmp); s.y += s.vY * s.vAmp;
if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll check if (s.x >= screenX || screenX - s.x < storm.flakeWidth) {
// X-axis scroll check
s.x = 0; s.x = 0;
} else if (vX < 0 && s.x-storm.flakeLeftOffset < -storm.flakeWidth) { } else if (vX < 0 && s.x - storm.flakeLeftOffset < -storm.flakeWidth) {
s.x = screenX-storm.flakeWidth-1; // flakeWidth; s.x = screenX - storm.flakeWidth - 1; // flakeWidth;
} }
s.refresh(); s.refresh();
yDiff = screenY+scrollY-s.y+storm.flakeHeight; yDiff = screenY + scrollY - s.y + storm.flakeHeight;
if (yDiff<storm.flakeHeight) { if (yDiff < storm.flakeHeight) {
s.active = 0; s.active = 0;
if (storm.snowStick) { if (storm.snowStick) {
s.stick(); s.stick();
@ -437,7 +449,13 @@ class SnowStorm {
s.recycle(); s.recycle();
} }
} else { } else {
if (storm.useMeltEffect && s.active && s.type < 3 && !s.melting && Math.random()>0.998) { if (
storm.useMeltEffect &&
s.active &&
s.type < 3 &&
!s.melting &&
Math.random() > 0.998
) {
// ~1/1000 chance of melting mid-air, with each frame // ~1/1000 chance of melting mid-air, with each frame
s.melting = true; s.melting = true;
s.melt(); s.melt();
@ -452,41 +470,50 @@ class SnowStorm {
} else { } else {
s.twinkleFrame--; s.twinkleFrame--;
if (!opacitySupported) { if (!opacitySupported) {
s.o.style.visibility = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 'hidden' : 'visible'); s.o.style.visibility =
s.twinkleFrame && s.twinkleFrame % 2 === 0
? "hidden"
: "visible";
} else { } else {
s.o.style.opacity = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 0 : 1); s.o.style.opacity =
s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 0 : 1;
} }
} }
} }
} }
}; };
this.animate = function() { this.animate = function () {
// main animation loop // main animation loop
// move, check status, die etc. // move, check status, die etc.
s.move(); s.move();
}; };
this.setVelocities = function() { this.setVelocities = function () {
s.vX = vRndX+rnd(storm.vMaxX*0.12,0.1); s.vX = vRndX + rnd(storm.vMaxX * 0.12, 0.1);
s.vY = vRndY+rnd(storm.vMaxY*0.12,0.1); s.vY = vRndY + rnd(storm.vMaxY * 0.12, 0.1);
}; };
this.setOpacity = function(o,opacity) { this.setOpacity = function (o, opacity) {
if (!opacitySupported) { if (!opacitySupported) {
return false; return false;
} }
o.style.opacity = opacity; o.style.opacity = opacity;
}; };
this.melt = function() { this.melt = function () {
if (!storm.useMeltEffect || !s.melting) { if (!storm.useMeltEffect || !s.melting) {
s.recycle(); s.recycle();
} else { } else {
if (s.meltFrame < s.meltFrameCount) { if (s.meltFrame < s.meltFrameCount) {
s.setOpacity(s.o,s.meltFrames[s.meltFrame]); s.setOpacity(s.o, s.meltFrames[s.meltFrame]);
s.o.style.fontSize = s.fontSize-(s.fontSize*(s.meltFrame/s.meltFrameCount))+'px'; s.o.style.fontSize =
s.o.style.lineHeight = storm.flakeHeight+2+(storm.flakeHeight*0.75*(s.meltFrame/s.meltFrameCount))+'px'; s.fontSize - s.fontSize * (s.meltFrame / s.meltFrameCount) + "px";
s.o.style.lineHeight =
storm.flakeHeight +
2 +
storm.flakeHeight * 0.75 * (s.meltFrame / s.meltFrameCount) +
"px";
s.meltFrame++; s.meltFrame++;
} else { } else {
s.recycle(); s.recycle();
@ -494,36 +521,38 @@ class SnowStorm {
} }
}; };
this.recycle = function() { this.recycle = function () {
s.o.style.display = 'none'; s.o.style.display = "none";
s.o.style.position = (fixedForEverything?'fixed':'absolute'); s.o.style.position = fixedForEverything ? "fixed" : "absolute";
s.o.style.bottom = 'auto'; s.o.style.bottom = "auto";
s.setVelocities(); s.setVelocities();
s.vCheck(); s.vCheck();
s.meltFrame = 0; s.meltFrame = 0;
s.melting = false; s.melting = false;
s.setOpacity(s.o,1); s.setOpacity(s.o, 1);
s.o.style.padding = '0px'; s.o.style.padding = "0px";
s.o.style.margin = '0px'; s.o.style.margin = "0px";
s.o.style.fontSize = s.fontSize+'px'; s.o.style.fontSize = s.fontSize + "px";
s.o.style.lineHeight = (storm.flakeHeight+2)+'px'; s.o.style.lineHeight = storm.flakeHeight + 2 + "px";
s.o.style.textAlign = 'center'; s.o.style.textAlign = "center";
s.o.style.verticalAlign = 'baseline'; s.o.style.verticalAlign = "baseline";
s.x = parseInt(rnd(screenX-storm.flakeWidth-20),10); s.x = parseInt(rnd(screenX - storm.flakeWidth - 20), 10);
s.y = parseInt(rnd(screenY)*-1,10)-storm.flakeHeight; s.y = parseInt(rnd(screenY) * -1, 10) - storm.flakeHeight;
s.refresh(); s.refresh();
s.o.style.display = 'block'; s.o.style.display = "block";
s.active = 1; s.active = 1;
}; };
this.recycle(); // set up x/y coords etc. this.recycle(); // set up x/y coords etc.
this.refresh(); this.refresh();
}; };
this.snow = function() { this.snow = function () {
var active = 0, flake = null, i, j; var active = 0,
for (i=0, j=storm.flakes.length; i<j; i++) { flake = null,
i,
j;
for (i = 0, j = storm.flakes.length; i < j; i++) {
if (storm.flakes[i].active === 1) { if (storm.flakes[i].active === 1) {
storm.flakes[i].move(); storm.flakes[i].move();
active++; active++;
@ -532,8 +561,8 @@ class SnowStorm {
storm.flakes[i].melt(); storm.flakes[i].melt();
} }
} }
if (active<storm.flakesMaxActive) { if (active < storm.flakesMaxActive) {
flake = storm.flakes[parseInt(rnd(storm.flakes.length),10)]; flake = storm.flakes[parseInt(rnd(storm.flakes.length), 10)];
if (flake.active === 0) { if (flake.active === 0) {
flake.melting = true; flake.melting = true;
} }
@ -543,92 +572,107 @@ class SnowStorm {
} }
}; };
this.mouseMove = function(e) { this.mouseMove = function (e) {
if (!storm.followMouse) { if (!storm.followMouse) {
return true; return true;
} }
var x = parseInt(e.clientX,10); var x = parseInt(e.clientX, 10);
if (x<screenX2) { if (x < screenX2) {
windOffset = -windMultiplier+(x/screenX2*windMultiplier); windOffset = -windMultiplier + (x / screenX2) * windMultiplier;
} else { } else {
x -= screenX2; x -= screenX2;
windOffset = (x/screenX2)*windMultiplier; windOffset = (x / screenX2) * windMultiplier;
} }
}; };
this.createSnow = function(limit,allowInactive) { this.createSnow = function (limit, allowInactive) {
var i; var i;
for (i=0; i<limit; i++) { for (i = 0; i < limit; i++) {
storm.flakes[storm.flakes.length] = new storm.SnowFlake(parseInt(rnd(flakeTypes),10)); storm.flakes[storm.flakes.length] = new storm.SnowFlake(
if (allowInactive || i>storm.flakesMaxActive) { parseInt(rnd(flakeTypes), 10)
storm.flakes[storm.flakes.length-1].active = -1; );
if (allowInactive || i > storm.flakesMaxActive) {
storm.flakes[storm.flakes.length - 1].active = -1;
} }
} }
storm.targetElement.appendChild(docFrag); storm.targetElement.appendChild(docFrag);
}; };
this.timerInit = function() { this.timerInit = function () {
storm.timer = true; storm.timer = true;
storm.snow(); storm.snow();
}; };
this.init = function() { this.init = function () {
var i; var i;
for (i=0; i<storm.meltFrameCount; i++) { for (i = 0; i < storm.meltFrameCount; i++) {
storm.meltFrames.push(1-(i/storm.meltFrameCount)); storm.meltFrames.push(1 - i / storm.meltFrameCount);
} }
storm.randomizeWind(); storm.randomizeWind();
storm.createSnow(storm.flakesMax); // create initial batch storm.createSnow(storm.flakesMax); // create initial batch
storm.events.add(window,'resize',storm.resizeHandler); storm.events.add(window, "resize", storm.resizeHandler);
storm.events.add(window,'scroll',storm.scrollHandler); storm.events.add(window, "scroll", storm.scrollHandler);
if (storm.freezeOnBlur) { if (storm.freezeOnBlur) {
if (isIE) { if (isIE) {
storm.events.add(document,'focusout',storm.freeze); storm.events.add(document, "focusout", storm.freeze);
storm.events.add(document,'focusin',storm.resume); storm.events.add(document, "focusin", storm.resume);
} else { } else {
storm.events.add(window,'blur',storm.freeze); storm.events.add(window, "blur", storm.freeze);
storm.events.add(window,'focus',storm.resume); storm.events.add(window, "focus", storm.resume);
} }
} }
storm.resizeHandler(); storm.resizeHandler();
storm.scrollHandler(); storm.scrollHandler();
if (storm.followMouse) { if (storm.followMouse) {
storm.events.add(isIE?document:window,'mousemove',storm.mouseMove); storm.events.add(
isIE ? document : window,
"mousemove",
storm.mouseMove
);
} }
storm.animationInterval = Math.max(20,storm.animationInterval); storm.animationInterval = Math.max(20, storm.animationInterval);
storm.timerInit(); storm.timerInit();
}; };
this.start = function(bFromOnLoad) { this.start = function (bFromOnLoad) {
if (!didInit) { if (!didInit) {
didInit = true; didInit = true;
} else if (bFromOnLoad) { } else if (bFromOnLoad) {
// already loaded and running // already loaded and running
return true; return true;
} }
if (typeof storm.targetElement === 'string') { if (typeof storm.targetElement === "string") {
var targetID = storm.targetElement; var targetID = storm.targetElement;
storm.targetElement = document.getElementById(targetID); storm.targetElement = document.getElementById(targetID);
if (!storm.targetElement) { if (!storm.targetElement) {
throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"'); throw new Error(
'Snowstorm: Unable to get targetElement "' + targetID + '"'
);
} }
} }
if (!storm.targetElement) { if (!storm.targetElement) {
storm.targetElement = (document.body || document.documentElement); storm.targetElement = document.body || document.documentElement;
} }
if (storm.targetElement !== document.documentElement && storm.targetElement !== document.body) { if (
storm.targetElement !== document.documentElement &&
storm.targetElement !== document.body
) {
// re-map handler to get element instead of screen dimensions // re-map handler to get element instead of screen dimensions
storm.resizeHandler = storm.resizeHandlerAlt; storm.resizeHandler = storm.resizeHandlerAlt;
//and force-enable pixel positioning //and force-enable pixel positioning
storm.usePixelPosition = true; storm.usePixelPosition = true;
} }
storm.resizeHandler(); // get bounding box elements storm.resizeHandler(); // get bounding box elements
storm.usePositionFixed = (storm.usePositionFixed && !noFixed && !storm.flakeBottom); // whether or not position:fixed is to be used storm.usePositionFixed =
storm.usePositionFixed && !noFixed && !storm.flakeBottom; // whether or not position:fixed is to be used
if (window.getComputedStyle) { if (window.getComputedStyle) {
// attempt to determine if body or user-specified snow parent element is relatlively-positioned. // attempt to determine if body or user-specified snow parent element is relatlively-positioned.
try { try {
targetElementIsRelative = (window.getComputedStyle(storm.targetElement, null).getPropertyValue('position') === 'relative'); targetElementIsRelative =
} catch(e) { window
.getComputedStyle(storm.targetElement, null)
.getPropertyValue("position") === "relative";
} catch (e) {
// oh well // oh well
targetElementIsRelative = false; targetElementIsRelative = false;
} }
@ -641,11 +685,15 @@ class SnowStorm {
}; };
function doDelayedStart() { function doDelayedStart() {
window.setTimeout(function() { window.setTimeout(function () {
storm.start(true); storm.start(true);
}, 20); }, 20);
// event cleanup // event cleanup
storm.events.remove(isIE?document:window,'mousemove',doDelayedStart); storm.events.remove(
isIE ? document : window,
"mousemove",
doDelayedStart
);
} }
function doStart() { function doStart() {
@ -653,16 +701,19 @@ class SnowStorm {
doDelayedStart(); doDelayedStart();
} }
// event cleanup // event cleanup
storm.events.remove(window, 'load', doStart); storm.events.remove(window, "load", doStart);
} }
// hooks for starting the snow // hooks for starting the snow
if (storm.autoStart) { if (storm.autoStart) {
storm.events.add(window, 'load', doStart, false); storm.events.add(window, "load", doStart, false);
} }
return this; return this;
} }
} }
new SnowStorm(); const snow_container = document.querySelector(".snow-container");
if (snow_container) {
new SnowStorm();
}