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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>
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>
import "../../scripts/snow.js";
</script>

5
src/layouts/Layout.astro
View file

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

675
src/scripts/snow.js
View file

@ -12,190 +12,181 @@
/*global window, document, navigator, clearInterval, setInterval */
class SnowStorm {
constructor() {
constructor() {
// --- common properties ---
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.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.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.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.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.snowColor = '#fff'; // Don't eat (or use?) yellow snow.
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.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.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.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.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.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.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.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.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.snowColor = "#fff"; // Don't eat (or use?) yellow snow.
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.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.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.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 ---
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.flakeRightOffset = 0; // Right margin/gutter space on edge of container
this.flakeWidth = 8; // Max pixel width reserved for snow element
this.flakeHeight = 8; // Max pixel height reserved for snow element
this.vMaxX = 5; // Maximum X velocity range for snow
this.vMaxY = 4; // Maximum Y velocity range for snow
this.zIndex = 0; // CSS stacking order applied to each snowflake
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.flakeRightOffset = 0; // Right margin/gutter space on edge of container
this.flakeWidth = 8; // Max pixel width reserved for snow element
this.flakeHeight = 8; // Max pixel height reserved for snow element
this.vMaxX = 5; // Maximum X velocity range for snow
this.vMaxY = 4; // Maximum Y velocity range for snow
this.zIndex = 0; // CSS stacking order applied to each snowflake
// --- "No user-serviceable parts inside" past this point, yadda yadda ---
var storm = this,
features,
// UA sniffing and backCompat rendering mode checks for fixed position, etc.
isIE = navigator.userAgent.match(/msie/i),
isIE6 = navigator.userAgent.match(/msie 6/i),
isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i),
isBackCompatIE = (isIE && document.compatMode === 'BackCompat'),
noFixed = (isBackCompatIE || isIE6),
screenX = null, screenX2 = null, screenY = null, scrollY = null, docHeight = null, vRndX = null, vRndY = null,
windOffset = 1,
windMultiplier = 2,
flakeTypes = 6,
fixedForEverything = false,
targetElementIsRelative = false,
opacitySupported = (function(){
try {
document.createElement('div').style.opacity = '0.5';
} catch(e) {
return false;
}
return true;
}()),
didInit = false,
docFrag = document.createDocumentFragment();
features = (function() {
features,
// UA sniffing and backCompat rendering mode checks for fixed position, etc.
isIE = navigator.userAgent.match(/msie/i),
isIE6 = navigator.userAgent.match(/msie 6/i),
isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i),
isBackCompatIE = isIE && document.compatMode === "BackCompat",
noFixed = isBackCompatIE || isIE6,
screenX = null,
screenX2 = null,
screenY = null,
scrollY = null,
docHeight = null,
vRndX = null,
vRndY = null,
windOffset = 1,
windMultiplier = 2,
flakeTypes = 6,
fixedForEverything = false,
targetElementIsRelative = false,
opacitySupported = (function () {
try {
document.createElement("div").style.opacity = "0.5";
} catch (e) {
return false;
}
return true;
})(),
didInit = false,
docFrag = document.createDocumentFragment();
features = (function () {
var getAnimationFrame;
/**
* hat tip: paul irish
* http://paulirish.com/2011/requestanimationframe-for-smart-animating/
* https://gist.github.com/838785
*/
function timeoutShim(callback) {
window.setTimeout(callback, 1000/(storm.animationInterval || 20));
window.setTimeout(callback, 1000 / (storm.animationInterval || 20));
}
var _animationFrame = (window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
timeoutShim);
var _animationFrame =
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
timeoutShim;
// apply to window, avoid "illegal invocation" errors in Chrome
getAnimationFrame = _animationFrame ? function() {
return _animationFrame.apply(window, arguments);
} : null;
getAnimationFrame = _animationFrame
? function () {
return _animationFrame.apply(window, arguments);
}
: null;
var testDiv;
testDiv = document.createElement('div');
testDiv = document.createElement("div");
function has(prop) {
// test for feature support
var result = testDiv.style[prop];
return (result !== undefined ? prop : null);
return result !== undefined ? prop : null;
}
// note local scope.
var localFeatures = {
transform: {
ie: has('-ms-transform'),
moz: has('MozTransform'),
opera: has('OTransform'),
webkit: has('webkitTransform'),
w3: has('transform'),
prop: null // the normalized property value
ie: has("-ms-transform"),
moz: has("MozTransform"),
opera: has("OTransform"),
webkit: has("webkitTransform"),
w3: has("transform"),
prop: null, // the normalized property value
},
getAnimationFrame: getAnimationFrame
getAnimationFrame: getAnimationFrame,
};
localFeatures.transform.prop = (
localFeatures.transform.w3 ||
localFeatures.transform.prop =
localFeatures.transform.w3 ||
localFeatures.transform.moz ||
localFeatures.transform.webkit ||
localFeatures.transform.ie ||
localFeatures.transform.opera
);
localFeatures.transform.opera;
testDiv = null;
return localFeatures;
}());
})();
this.timer = null;
this.flakes = [];
this.disabled = false;
this.active = false;
this.meltFrameCount = 20;
this.meltFrames = [];
this.setXY = function(o, x, y) {
this.setXY = function (o, x, y) {
if (!o) {
return false;
}
if (storm.usePixelPosition || targetElementIsRelative) {
o.style.left = (x - storm.flakeWidth) + 'px';
o.style.top = (y - storm.flakeHeight) + 'px';
o.style.left = x - storm.flakeWidth + "px";
o.style.top = y - storm.flakeHeight + "px";
} else if (noFixed) {
o.style.right = (100-(x/screenX*100)) + '%';
o.style.right = 100 - (x / screenX) * 100 + "%";
// 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 {
if (!storm.flakeBottom) {
// if not using a fixed bottom coordinate...
o.style.right = (100-(x/screenX*100)) + '%';
o.style.bottom = (100-(y/screenY*100)) + '%';
o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.bottom = 100 - (y / screenY) * 100 + "%";
} else {
// absolute top.
o.style.right = (100-(x/screenX*100)) + '%';
o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px';
o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.top = Math.min(y, docHeight - storm.flakeHeight) + "px";
}
}
};
this.events = (function() {
var old = (!window.addEventListener && window.attachEvent), slice = Array.prototype.slice,
evt = {
add: (old?'attachEvent':'addEventListener'),
remove: (old?'detachEvent':'removeEventListener')
};
this.events = (function () {
var old = !window.addEventListener && window.attachEvent,
slice = Array.prototype.slice,
evt = {
add: old ? "attachEvent" : "addEventListener",
remove: old ? "detachEvent" : "removeEventListener",
};
function getArgs(oArgs) {
var args = slice.call(oArgs), len = args.length;
var args = slice.call(oArgs),
len = args.length;
if (old) {
args[1] = 'on' + args[1]; // prefix
args[1] = "on" + args[1]; // prefix
if (len > 3) {
args.pop(); // no capture
}
@ -204,92 +195,107 @@ class SnowStorm {
}
return args;
}
function apply(args, sType) {
var element = args.shift(),
method = [evt[sType]];
method = [evt[sType]];
if (old) {
element[method](args[0], args[1]);
} else {
element[method].apply(element, args);
}
}
function addEvent() {
apply(getArgs(arguments), 'add');
apply(getArgs(arguments), "add");
}
function removeEvent() {
apply(getArgs(arguments), 'remove');
apply(getArgs(arguments), "remove");
}
return {
add: addEvent,
remove: removeEvent
remove: removeEvent,
};
}());
function rnd(n,min) {
})();
function rnd(n, min) {
if (isNaN(min)) {
min = 0;
}
return (Math.random()*n)+min;
return Math.random() * n + min;
}
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;
vRndX = plusMinus(rnd(storm.vMaxX,0.2));
vRndY = rnd(storm.vMaxY,0.2);
vRndX = plusMinus(rnd(storm.vMaxX, 0.2));
vRndY = rnd(storm.vMaxY, 0.2);
if (this.flakes) {
for (i=0; i<this.flakes.length; i++) {
for (i = 0; i < this.flakes.length; i++) {
if (this.flakes[i].active) {
this.flakes[i].setVelocities();
}
}
}
};
this.scrollHandler = function() {
this.scrollHandler = function () {
var i;
// "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)) {
scrollY = 0; // Netscape 6 scroll fix
}
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) {
storm.flakes[i].stick();
}
}
}
};
this.resizeHandler = function() {
this.resizeHandler = function () {
if (window.innerWidth || window.innerHeight) {
screenX = window.innerWidth - 16 - storm.flakeRightOffset;
screenY = (storm.flakeBottom || window.innerHeight);
screenY = storm.flakeBottom || window.innerHeight;
} else {
screenX = (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;
screenX =
(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;
screenX2 = parseInt(screenX/2,10);
screenX2 = parseInt(screenX / 2, 10);
};
this.resizeHandlerAlt = function() {
this.resizeHandlerAlt = function () {
screenX = storm.targetElement.offsetWidth - storm.flakeRightOffset;
screenY = storm.flakeBottom || storm.targetElement.offsetHeight;
screenX2 = parseInt(screenX/2,10);
screenX2 = parseInt(screenX / 2, 10);
docHeight = document.body.offsetHeight;
};
this.freeze = function() {
this.freeze = function () {
// pause animation
if (!storm.disabled) {
storm.disabled = 1;
@ -298,17 +304,17 @@ class SnowStorm {
}
storm.timer = null;
};
this.resume = function() {
this.resume = function () {
if (storm.disabled) {
storm.disabled = 0;
storm.disabled = 0;
} else {
return false;
}
storm.timerInit();
};
this.toggleSnow = function() {
this.toggleSnow = function () {
if (!storm.flakes.length) {
// first run
storm.start();
@ -323,41 +329,41 @@ class SnowStorm {
}
}
};
this.stop = function() {
this.stop = function () {
var i;
this.freeze();
for (i=0; i<this.flakes.length; i++) {
this.flakes[i].o.style.display = 'none';
for (i = 0; i < this.flakes.length; i++) {
this.flakes[i].o.style.display = "none";
}
storm.events.remove(window,'scroll',storm.scrollHandler);
storm.events.remove(window,'resize',storm.resizeHandler);
storm.events.remove(window, "scroll", storm.scrollHandler);
storm.events.remove(window, "resize", storm.resizeHandler);
if (storm.freezeOnBlur) {
if (isIE) {
storm.events.remove(document,'focusout',storm.freeze);
storm.events.remove(document,'focusin',storm.resume);
storm.events.remove(document, "focusout", storm.freeze);
storm.events.remove(document, "focusin", storm.resume);
} else {
storm.events.remove(window,'blur',storm.freeze);
storm.events.remove(window,'focus',storm.resume);
storm.events.remove(window, "blur", storm.freeze);
storm.events.remove(window, "focus", storm.resume);
}
}
};
this.show = function() {
this.show = function () {
var i;
for (i=0; i<this.flakes.length; i++) {
this.flakes[i].o.style.display = 'block';
for (i = 0; i < this.flakes.length; i++) {
this.flakes[i].o.style.display = "block";
}
};
this.SnowFlake = function(type,x,y) {
this.SnowFlake = function (type, x, y) {
var s = this;
this.type = type;
this.x = x||parseInt(rnd(screenX-20),10);
this.y = (!isNaN(y)?y:-rnd(screenY)-12);
this.x = x || parseInt(rnd(screenX - 20), 10);
this.y = !isNaN(y) ? y : -rnd(screenY) - 12;
this.vX = 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.melting = false;
this.meltFrameCount = storm.meltFrameCount;
@ -365,71 +371,77 @@ class SnowStorm {
this.meltFrame = 0;
this.twinkleFrame = 0;
this.active = 1;
this.fontSize = (10+(this.type/5)*10);
this.o = document.createElement('div');
this.fontSize = 10 + (this.type / 5) * 10;
this.o = document.createElement("div");
this.o.innerHTML = storm.snowCharacter;
if (storm.className) {
this.o.setAttribute('class', storm.className);
this.o.setAttribute("class", storm.className);
}
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) {
// 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.height = storm.flakeHeight+'px';
this.o.style.fontFamily = 'arial,verdana';
this.o.style.cursor = 'default';
this.o.style.overflow = 'hidden';
this.o.style.fontWeight = 'normal';
this.o.style.width = storm.flakeWidth + "px";
this.o.style.height = storm.flakeHeight + "px";
this.o.style.fontFamily = "arial,verdana";
this.o.style.cursor = "default";
this.o.style.overflow = "hidden";
this.o.style.fontWeight = "normal";
this.o.style.zIndex = storm.zIndex;
docFrag.appendChild(this.o);
this.refresh = function() {
this.refresh = function () {
if (isNaN(s.x) || isNaN(s.y)) {
// safety check
return false;
}
storm.setXY(s.o, s.x, s.y);
};
this.stick = function() {
if (noFixed || (storm.targetElement !== document.documentElement && storm.targetElement !== document.body)) {
s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px';
this.stick = function () {
if (
noFixed ||
(storm.targetElement !== document.documentElement &&
storm.targetElement !== document.body)
) {
s.o.style.top = screenY + scrollY - storm.flakeHeight + "px";
} else if (storm.flakeBottom) {
s.o.style.top = storm.flakeBottom+'px';
s.o.style.top = storm.flakeBottom + "px";
} else {
s.o.style.display = 'none';
s.o.style.bottom = '0%';
s.o.style.position = 'fixed';
s.o.style.display = 'block';
s.o.style.display = "none";
s.o.style.bottom = "0%";
s.o.style.position = "fixed";
s.o.style.display = "block";
}
};
this.vCheck = function() {
if (s.vX>=0 && s.vX<0.2) {
this.vCheck = function () {
if (s.vX >= 0 && 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;
}
if (s.vY>=0 && s.vY<0.2) {
if (s.vY >= 0 && s.vY < 0.2) {
s.vY = 0.2;
}
};
this.move = function() {
var vX = s.vX*windOffset, yDiff;
this.move = function () {
var vX = s.vX * windOffset,
yDiff;
s.x += vX;
s.y += (s.vY*s.vAmp);
if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll check
s.y += s.vY * s.vAmp;
if (s.x >= screenX || screenX - s.x < storm.flakeWidth) {
// X-axis scroll check
s.x = 0;
} else if (vX < 0 && s.x-storm.flakeLeftOffset < -storm.flakeWidth) {
s.x = screenX-storm.flakeWidth-1; // flakeWidth;
} else if (vX < 0 && s.x - storm.flakeLeftOffset < -storm.flakeWidth) {
s.x = screenX - storm.flakeWidth - 1; // flakeWidth;
}
s.refresh();
yDiff = screenY+scrollY-s.y+storm.flakeHeight;
if (yDiff<storm.flakeHeight) {
yDiff = screenY + scrollY - s.y + storm.flakeHeight;
if (yDiff < storm.flakeHeight) {
s.active = 0;
if (storm.snowStick) {
s.stick();
@ -437,7 +449,13 @@ class SnowStorm {
s.recycle();
}
} 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
s.melting = true;
s.melt();
@ -452,78 +470,89 @@ class SnowStorm {
} else {
s.twinkleFrame--;
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 {
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
// move, check status, die etc.
s.move();
};
this.setVelocities = function() {
s.vX = vRndX+rnd(storm.vMaxX*0.12,0.1);
s.vY = vRndY+rnd(storm.vMaxY*0.12,0.1);
this.setVelocities = function () {
s.vX = vRndX + rnd(storm.vMaxX * 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) {
return false;
}
o.style.opacity = opacity;
};
this.melt = function() {
this.melt = function () {
if (!storm.useMeltEffect || !s.melting) {
s.recycle();
} else {
if (s.meltFrame < s.meltFrameCount) {
s.setOpacity(s.o,s.meltFrames[s.meltFrame]);
s.o.style.fontSize = 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.setOpacity(s.o, s.meltFrames[s.meltFrame]);
s.o.style.fontSize =
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++;
} else {
s.recycle();
}
}
};
this.recycle = function() {
s.o.style.display = 'none';
s.o.style.position = (fixedForEverything?'fixed':'absolute');
s.o.style.bottom = 'auto';
this.recycle = function () {
s.o.style.display = "none";
s.o.style.position = fixedForEverything ? "fixed" : "absolute";
s.o.style.bottom = "auto";
s.setVelocities();
s.vCheck();
s.meltFrame = 0;
s.melting = false;
s.setOpacity(s.o,1);
s.o.style.padding = '0px';
s.o.style.margin = '0px';
s.o.style.fontSize = s.fontSize+'px';
s.o.style.lineHeight = (storm.flakeHeight+2)+'px';
s.o.style.textAlign = 'center';
s.o.style.verticalAlign = 'baseline';
s.x = parseInt(rnd(screenX-storm.flakeWidth-20),10);
s.y = parseInt(rnd(screenY)*-1,10)-storm.flakeHeight;
s.setOpacity(s.o, 1);
s.o.style.padding = "0px";
s.o.style.margin = "0px";
s.o.style.fontSize = s.fontSize + "px";
s.o.style.lineHeight = storm.flakeHeight + 2 + "px";
s.o.style.textAlign = "center";
s.o.style.verticalAlign = "baseline";
s.x = parseInt(rnd(screenX - storm.flakeWidth - 20), 10);
s.y = parseInt(rnd(screenY) * -1, 10) - storm.flakeHeight;
s.refresh();
s.o.style.display = 'block';
s.o.style.display = "block";
s.active = 1;
};
this.recycle(); // set up x/y coords etc.
this.refresh();
};
this.snow = function() {
var active = 0, flake = null, i, j;
for (i=0, j=storm.flakes.length; i<j; i++) {
this.snow = function () {
var active = 0,
flake = null,
i,
j;
for (i = 0, j = storm.flakes.length; i < j; i++) {
if (storm.flakes[i].active === 1) {
storm.flakes[i].move();
active++;
@ -532,8 +561,8 @@ class SnowStorm {
storm.flakes[i].melt();
}
}
if (active<storm.flakesMaxActive) {
flake = storm.flakes[parseInt(rnd(storm.flakes.length),10)];
if (active < storm.flakesMaxActive) {
flake = storm.flakes[parseInt(rnd(storm.flakes.length), 10)];
if (flake.active === 0) {
flake.melting = true;
}
@ -542,93 +571,108 @@ class SnowStorm {
features.getAnimationFrame(storm.snow);
}
};
this.mouseMove = function(e) {
this.mouseMove = function (e) {
if (!storm.followMouse) {
return true;
}
var x = parseInt(e.clientX,10);
if (x<screenX2) {
windOffset = -windMultiplier+(x/screenX2*windMultiplier);
var x = parseInt(e.clientX, 10);
if (x < screenX2) {
windOffset = -windMultiplier + (x / screenX2) * windMultiplier;
} else {
x -= screenX2;
windOffset = (x/screenX2)*windMultiplier;
windOffset = (x / screenX2) * windMultiplier;
}
};
this.createSnow = function(limit,allowInactive) {
this.createSnow = function (limit, allowInactive) {
var i;
for (i=0; i<limit; i++) {
storm.flakes[storm.flakes.length] = new storm.SnowFlake(parseInt(rnd(flakeTypes),10));
if (allowInactive || i>storm.flakesMaxActive) {
storm.flakes[storm.flakes.length-1].active = -1;
for (i = 0; i < limit; i++) {
storm.flakes[storm.flakes.length] = new storm.SnowFlake(
parseInt(rnd(flakeTypes), 10)
);
if (allowInactive || i > storm.flakesMaxActive) {
storm.flakes[storm.flakes.length - 1].active = -1;
}
}
storm.targetElement.appendChild(docFrag);
};
this.timerInit = function() {
this.timerInit = function () {
storm.timer = true;
storm.snow();
};
this.init = function() {
this.init = function () {
var i;
for (i=0; i<storm.meltFrameCount; i++) {
storm.meltFrames.push(1-(i/storm.meltFrameCount));
for (i = 0; i < storm.meltFrameCount; i++) {
storm.meltFrames.push(1 - i / storm.meltFrameCount);
}
storm.randomizeWind();
storm.createSnow(storm.flakesMax); // create initial batch
storm.events.add(window,'resize',storm.resizeHandler);
storm.events.add(window,'scroll',storm.scrollHandler);
storm.events.add(window, "resize", storm.resizeHandler);
storm.events.add(window, "scroll", storm.scrollHandler);
if (storm.freezeOnBlur) {
if (isIE) {
storm.events.add(document,'focusout',storm.freeze);
storm.events.add(document,'focusin',storm.resume);
storm.events.add(document, "focusout", storm.freeze);
storm.events.add(document, "focusin", storm.resume);
} else {
storm.events.add(window,'blur',storm.freeze);
storm.events.add(window,'focus',storm.resume);
storm.events.add(window, "blur", storm.freeze);
storm.events.add(window, "focus", storm.resume);
}
}
storm.resizeHandler();
storm.scrollHandler();
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();
};
this.start = function(bFromOnLoad) {
this.start = function (bFromOnLoad) {
if (!didInit) {
didInit = true;
} else if (bFromOnLoad) {
// already loaded and running
return true;
}
if (typeof storm.targetElement === 'string') {
if (typeof storm.targetElement === "string") {
var targetID = storm.targetElement;
storm.targetElement = document.getElementById(targetID);
if (!storm.targetElement) {
throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"');
throw new Error(
'Snowstorm: Unable to get targetElement "' + targetID + '"'
);
}
}
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
storm.resizeHandler = storm.resizeHandlerAlt;
//and force-enable pixel positioning
storm.usePixelPosition = true;
}
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) {
// attempt to determine if body or user-specified snow parent element is relatlively-positioned.
try {
targetElementIsRelative = (window.getComputedStyle(storm.targetElement, null).getPropertyValue('position') === 'relative');
} catch(e) {
targetElementIsRelative =
window
.getComputedStyle(storm.targetElement, null)
.getPropertyValue("position") === "relative";
} catch (e) {
// oh well
targetElementIsRelative = false;
}
@ -639,30 +683,37 @@ class SnowStorm {
storm.active = true;
}
};
function doDelayedStart() {
window.setTimeout(function() {
window.setTimeout(function () {
storm.start(true);
}, 20);
// event cleanup
storm.events.remove(isIE?document:window,'mousemove',doDelayedStart);
storm.events.remove(
isIE ? document : window,
"mousemove",
doDelayedStart
);
}
function doStart() {
if (!storm.excludeMobile || !isMobile) {
doDelayedStart();
}
// event cleanup
storm.events.remove(window, 'load', doStart);
storm.events.remove(window, "load", doStart);
}
// hooks for starting the snow
if (storm.autoStart) {
storm.events.add(window, 'load', doStart, false);
storm.events.add(window, "load", doStart, false);
}
return this;
}
}
}
new SnowStorm();
const snow_container = document.querySelector(".snow-container");
if (snow_container) {
new SnowStorm();
}