www.gusucode.com > 200套html5精品模板1_50 > 200套html5精品模板1_50/009/js/jquery.scrollorama.js
/*
scrollorama - The jQuery plugin for doing cool scrolly stuff
by John Polacek (@johnpolacek)
Dual licensed under MIT and GPL.
*/
(function($) {
$.scrollorama = function(options) {
// PRIVATE VARS
var blocks = [],
browserPrefix = '',
onBlockChange = function() {};
var scrollorama = this;
var defaults = {offset:0, enablePin:true};
scrollorama.settings = $.extend({}, defaults, options);
scrollorama.blockIndex = 0;
if (options.blocks === undefined) alert('ERROR: Must assign blocks class selector to scrollorama plugin');
// PRIVATE FUNCTIONS
function init() {
if (typeof scrollorama.settings.blocks === 'string') scrollorama.settings.blocks = $(scrollorama.settings.blocks);
// set browser prefix
if ($.browser.mozilla) browserPrefix = '-moz-';
if ($.browser.webkit) browserPrefix = '-webkit-';
if ($.browser.opera) browserPrefix = '-o-';
if ($.browser.msie) browserPrefix = '-ms-';
// create blocks array to contain animation props
$('body').css('position','relative');
var i;
for (i=0; i<scrollorama.settings.blocks.length; i++) {
var block = scrollorama.settings.blocks.eq(i);
blocks.push({
block: block,
top: block.offset().top - parseInt(block.css('margin-top'), 10),
pin: 0,
animations:[]
});
}
// convert block elements to absolute position
if (scrollorama.settings.enablePin.toString() == 'true') {
for (i=0; i<blocks.length; i++) {
blocks[i].block
.css('position', 'absolute')
.animate('top', blocks[i].top);
}
}
$('body').prepend('<div id="scroll-wrap"></div>');
var didScroll = false;
$(window).scroll(function(){
didScroll = true;
});
setInterval(function(){
if(didScroll){
onScrollorama();
didScroll = false;
}
}, 0);
}
function onScrollorama() {
var scrollTop = $(window).scrollTop();
var currBlockIndex = getCurrBlockIndex(scrollTop);
// update all animations
for (var i=0; i<blocks.length; i++) {
// go through the animations for each block
if (blocks[i].animations.length) {
for (var j=0; j<blocks[i].animations.length; j++) {
var anim = blocks[i].animations[j];
// if above current block, settings should be at start value
if (i > currBlockIndex) {
if (currBlockIndex != i-1 && anim.baseline != 'bottom') {
setProperty(anim.element, anim.property, anim.startVal);
}
if (blocks[i].pin) {
blocks[i].block
.css('position', 'absolute')
.animate('top', blocks[i].top);
}
}
// if below current block, settings should be at end value
// unless on an element that gets animated when it hits the bottom of the viewport
else if (i < currBlockIndex) {
setProperty(anim.element, anim.property, anim.endVal);
if (blocks[i].pin) {
blocks[i].block
.css('position', 'absolute')
.animate('top', (blocks[i].top + blocks[i].pin));
}
}
// otherwise, set values per scroll position
if (i == currBlockIndex || (currBlockIndex == i-1 && anim.baseline == 'bottom')) {
// if block gets pinned, set position fixed
if (blocks[i].pin && currBlockIndex == i) {
blocks[i].block
.css('position', 'fixed')
.animate('top', 0);
}
// set start and end animation positions
var startAnimPos = blocks[i].top + anim.delay;
if (anim.baseline == 'bottom') startAnimPos -= $(window).height();
var endAnimPos = startAnimPos + anim.duration;
// if scroll is before start of animation, set to start value
if (scrollTop < startAnimPos) setProperty(anim.element, anim.property, anim.startVal);
// if scroll is after end of animation, set to end value
else if (scrollTop > endAnimPos) {
setProperty(anim.element, anim.property, anim.endVal);
if (blocks[i].pin) {
blocks[i].block
.css('position', 'absolute')
.animate('top', (blocks[i].top + blocks[i].pin));
}
}
// otherwise, set value based on scroll
else {
// calculate percent to animate
var animPercent = (scrollTop - startAnimPos) / anim.duration;
// account for easing if there is any
if ( anim.easing && $.isFunction( $.easing[anim.easing] ) ){
animPercent = $.easing[anim.easing]( animPercent, animPercent*1000, 0, 1, 1000 );
}
// then multiply the percent by the value range and calculate the new value
var animVal = anim.startVal + (animPercent * (anim.endVal - anim.startVal));
setProperty(anim.element, anim.property, animVal);
}
}
}
}
}
// update blockIndex and trigger event if changed
if (scrollorama.blockIndex != currBlockIndex) {
scrollorama.blockIndex = currBlockIndex;
onBlockChange();
}
}
function getCurrBlockIndex(scrollTop) {
var currBlockIndex = 0;
for (var i=0; i<blocks.length; i++) {
// check if block is in view
if (blocks[i].top <= scrollTop - scrollorama.settings.offset) currBlockIndex = i;
}
return currBlockIndex;
}
function setProperty(target, prop, val) {
if (prop === 'rotate' || prop === 'zoom' || prop === 'scale') {
if (prop === 'rotate') {
target.css(browserPrefix+'transform', 'rotate('+val+'deg)');
} else if (prop === 'zoom' || prop === 'scale') {
var scaleCSS = 'scale('+val+')';
if (browserPrefix !== '-ms-') {
target.css(browserPrefix+'transform', scaleCSS);
} else {
target.css('zoom', scaleCSS);
}
}
}
else if(prop === 'background-position-x' || prop === 'background-position-y' ){
var currentPosition = target.css('background-position').split(' ');
if(prop === 'background-position-x'){
target.css('background-position',val+'px '+currentPosition[1])
}
if(prop === 'background-position-y'){
target.css('background-position',currentPosition[0]+' '+val+'px')
}
}
else if(prop === 'text-shadow' ){
target.css(prop,'0px 0px '+val+'px #ffffff');
} else {
target.css(prop, val);
}
}
// PUBLIC FUNCTIONS
scrollorama.animate = function(target) {
/*
target = animation target
arguments = array of animation parameters
animation parameters:
delay = amount of scrolling (in pixels) before animation starts
duration = amount of scrolling (in pixels) over which the animation occurs
property = css property being animated
start = start value of the property
end = end value of the property
pin = pin block during animation duration (applies to all animations within block)
baseline = top (default, when block reaches top of viewport) or bottom (when block first comies into view)
easing = just like jquery's easing functions
*/
// if string, convert to DOM object
if (typeof target === 'string') target = $(target);
// find block of target
var targetIndex;
var targetBlock;
for (var i=0; i<blocks.length; i++) {
if (blocks[i].block.has(target).length) {
targetBlock = blocks[i];
targetIndex = i;
}
}
// add each animation to the blocks animations array
for (i=1; i<arguments.length; i++) {
var anim = arguments[i];
// for top/left/right/bottom, set relative positioning if static
if (anim.property == 'top' || anim.property == 'left' || anim.property == 'bottom' || anim.property == 'right' ) {
if (target.css('position') == 'static') target.css('position','relative');
// set anim.start, anim.end defaults
if (anim.start === undefined) anim.start = 0;
else if (anim.end === undefined) anim.end = 0;
}
// set anim.start/anim.end defaults for rotate, zoom/scale, letter-spacing
if (anim.property == 'rotate') {
if (anim.start === undefined) anim.start = 0;
if (anim.end === undefined) anim.end = 0;
} else if (anim.property == 'zoom' || anim.property == 'scale' ) {
if (anim.start === undefined) anim.start = 1;
if (anim.end === undefined) anim.end = 1;
} else if (anim.property == 'letter-spacing' && target.css(anim.property)) {
if (anim.start === undefined) anim.start = 1;
if (anim.end === undefined) anim.end = 1;
}
if (anim.baseline === undefined) {
if (anim.pin || targetBlock.pin || targetIndex === 0) anim.baseline = 'top';
else anim.baseline = 'bottom';
}
if (anim.delay === undefined) anim.delay = 0;
targetBlock.animations.push({
element: target,
delay: anim.delay,
duration: anim.duration,
property: anim.property,
startVal: anim.start !== undefined ? anim.start : parseInt(target.css(anim.property),10), // if undefined, use current css value
endVal: anim.end !== undefined ? anim.end : parseInt(target.css(anim.property),10), // if undefined, use current css value
baseline: anim.baseline !== undefined ? anim.baseline : 'bottom',
easing: anim.easing
});
if (anim.pin) {
if (targetBlock.pin < anim.duration + anim.delay) {
var offset = anim.duration + anim.delay - targetBlock.pin;
targetBlock.pin += offset;
// adjust positions of blocks below target block
for (var j=targetIndex+1; j<blocks.length; j++) {
blocks[j].top += offset;
blocks[j].block.css('top', blocks[j].top);
}
}
}
}
onScrollorama();
};
// function for passing blockChange event callback
scrollorama.onBlockChange = function(f) {
onBlockChange = f;
};
// function for getting an array of scrollpoints
// (top of each animation block and animation element scroll start point)
scrollorama.getScrollpoints = function() {
var scrollpoints = [];
for (var i=0; i<blocks.length; i++) {
scrollpoints.push(blocks[i].top);
// go through the animations for each block
if (blocks[i].animations.length && blocks[i].pin > 0) {
for (var j=0; j<blocks[i].animations.length; j++) {
var anim = blocks[i].animations[j];
scrollpoints.push(blocks[i].top + anim.delay + anim.duration);
}
}
}
// make sure scrollpoints are in numeric order
scrollpoints.sort(function(a,b){return a - b;});
return scrollpoints;
};
// INIT
init();
return scrollorama;
};
//
// Easing functions COPIED DIRECTLY from jQuery UI
//
$.extend($.easing,
{
def: 'easeOutQuad',
swing: function (x, t, b, c, d) {
//alert($.easing.default);
return $.easing[$.easing.def](x, t, b, c, d);
},
easeInQuad: function (x, t, b, c, d) {
return c*(t/=d)*t + b;
},
easeOutQuad: function (x, t, b, c, d) {
return -c *(t/=d)*(t-2) + b;
},
easeInOutQuad: function (x, t, b, c, d) {
if ((t/=d/2) < 1) return c/2*t*t + b;
return -c/2 * ((--t)*(t-2) - 1) + b;
},
easeInCubic: function (x, t, b, c, d) {
return c*(t/=d)*t*t + b;
},
easeOutCubic: function (x, t, b, c, d) {
return c*((t=t/d-1)*t*t + 1) + b;
},
easeInOutCubic: function (x, t, b, c, d) {
if ((t/=d/2) < 1) return c/2*t*t*t + b;
return c/2*((t-=2)*t*t + 2) + b;
},
easeInQuart: function (x, t, b, c, d) {
return c*(t/=d)*t*t*t + b;
},
easeOutQuart: function (x, t, b, c, d) {
return -c * ((t=t/d-1)*t*t*t - 1) + b;
},
easeInOutQuart: function (x, t, b, c, d) {
if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
return -c/2 * ((t-=2)*t*t*t - 2) + b;
},
easeInQuint: function (x, t, b, c, d) {
return c*(t/=d)*t*t*t*t + b;
},
easeOutQuint: function (x, t, b, c, d) {
return c*((t=t/d-1)*t*t*t*t + 1) + b;
},
easeInOutQuint: function (x, t, b, c, d) {
if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
return c/2*((t-=2)*t*t*t*t + 2) + b;
},
easeInSine: function (x, t, b, c, d) {
return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
},
easeOutSine: function (x, t, b, c, d) {
return c * Math.sin(t/d * (Math.PI/2)) + b;
},
easeInOutSine: function (x, t, b, c, d) {
return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
},
easeInExpo: function (x, t, b, c, d) {
return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
},
easeOutExpo: function (x, t, b, c, d) {
return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
},
easeInOutExpo: function (x, t, b, c, d) {
if (t==0) return b;
if (t==d) return b+c;
if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
},
easeInCirc: function (x, t, b, c, d) {
return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
},
easeOutCirc: function (x, t, b, c, d) {
return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
},
easeInOutCirc: function (x, t, b, c, d) {
if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
},
easeInElastic: function (x, t, b, c, d) {
var s=1.70158;var p=0;var a=c;
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
if (a < Math.abs(c)) { a=c; var s=p/4; }
else var s = p/(2*Math.PI) * Math.asin (c/a);
return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
},
easeOutElastic: function (x, t, b, c, d) {
var s=1.70158;var p=0;var a=c;
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
if (a < Math.abs(c)) { a=c; var s=p/4; }
else var s = p/(2*Math.PI) * Math.asin (c/a);
return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
},
easeInOutElastic: function (x, t, b, c, d) {
var s=1.70158;var p=0;var a=c;
if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5);
if (a < Math.abs(c)) { a=c; var s=p/4; }
else var s = p/(2*Math.PI) * Math.asin (c/a);
if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
},
easeInBack: function (x, t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c*(t/=d)*t*((s+1)*t - s) + b;
},
easeOutBack: function (x, t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
},
easeInOutBack: function (x, t, b, c, d, s) {
if (s == undefined) s = 1.70158;
if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
},
easeInBounce: function (x, t, b, c, d) {
return c - $.easing.easeOutBounce (x, d-t, 0, c, d) + b;
},
easeOutBounce: function (x, t, b, c, d) {
if ((t/=d) < (1/2.75)) {
return c*(7.5625*t*t) + b;
} else if (t < (2/2.75)) {
return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
} else {
return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
}
},
easeInOutBounce: function (x, t, b, c, d) {
if (t < d/2) return $.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b;
return $.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b;
}
});
})(jQuery);
$(document).ready(function() {
var $window = $(window);
var leftpoz1= 283
var leftpoz2= 467
var leftpoz3= 2020
var leftpoz4= 334
var leftpoz5= 286
var leftpoz6= 1350
var leftpoz7= 300
var leftpoz8= 200
var rightpoz1= 371
var rightpoz2= 421
var rightpoz3= 200
var rightpoz4= 100
var poz200 = 200
if ($window.width() < 1370) {
leftpoz1= 23
leftpoz2= 193
leftpoz3= 1400
leftpoz4= 34
leftpoz5= 26
leftpoz6= 820
leftpoz7= 100
leftpoz8= 0
rightpoz1= 51
rightpoz2= 81
rightpoz3= 0
rightpoz4= 0
poz200 = 100
}
if ($window.width() < 1025) {
leftpoz1= 0
leftpoz2= 150
leftpoz3= 1000
leftpoz4= 0
leftpoz5= 26
leftpoz6= 570
leftpoz7= 100
leftpoz8= 0
rightpoz1= 51
rightpoz2= 81
rightpoz3= 0
rightpoz4= 0
poz200 = 0
}
var scrollorama = $.scrollorama({blocks:'.scrollblock'});
scrollorama.animate('.birds_1',{ duration:300, property:'zoom', end:0});
scrollorama.animate('.birds_1',{ duration:300, property:'opacity', end:0});
scrollorama.animate('.birds_2',{ duration:400, property:'zoom', end:0});
scrollorama.animate('.birds_2',{ duration:400, property:'top',start:545, end:0});
scrollorama.animate('.birds_2',{ duration:300, property:'right',start:rightpoz2, end:0});
scrollorama.animate('.birds_3',{ delay:700, duration:600, property:'opacity', end:0});
scrollorama.animate('.birds_3',{ delay:700, duration:600, property:'zoom', end:0});
scrollorama.animate('.birds_3',{ delay:700, duration:800, property:'top',start:1728, end:1900});
scrollorama.animate('.birds_3',{ delay:700, duration:800, property:'left',start:leftpoz4, end:leftpoz4+100});
scrollorama.animate('.birds_4',{ delay:700, duration:600, property:'zoom', end:0});
scrollorama.animate('.birds_4',{ delay:700, duration:500, property:'top',start:1696, end:1600});
scrollorama.animate('.birds_4',{ delay:700, duration:500, property:'left',start:leftpoz5, end:0});
scrollorama.animate('.birds_5',{ delay:2000, duration:500, property:'opacity', end:.5});
scrollorama.animate('.birds_5',{ delay:2000, duration:1500, property:'zoom', end:0});
scrollorama.animate('.birds_6',{ delay:3100, duration:600, property:'zoom', end:0});
scrollorama.animate('.birds_6',{ delay:3100, duration:600, property:'opacity', end:0});
scrollorama.animate('.balloon_1',{ duration:800, property:'left',start:leftpoz1, end:-500});
scrollorama.animate('.balloon_1',{ duration:800, property:'top',start:376, end:-500});
scrollorama.animate('.balloon_1,.balloon_2',{ duration:600, property:'zoom',end:0});
scrollorama.animate('.balloon_1,.balloon_2',{ duration:800, property:'opacity', end:.5});
scrollorama.animate('.balloon_2',{ duration:800, property:'left',start:leftpoz2, end:leftpoz3});
scrollorama.animate('.balloon_2',{ duration:800, property:'top',start:721, end:1000});
scrollorama.animate('.balloon_3',{ duration:800, property:'right',start:rightpoz1, end:2100});
scrollorama.animate('.balloon_3',{ duration:1000, property:'top',start:204, end:800});
scrollorama.animate('.balloon_4',{ delay:900, duration:1500, property:'opacity', end:0});
scrollorama.animate('.balloon_4',{ delay:900, duration:1500, property:'zoom', end:0});
scrollorama.animate('.balloon_4',{ delay:300, duration:2000, property:'top',start:1300, end:2300});
scrollorama.animate('.balloon_4',{ delay:300, duration:2000, property:'right',start:0, end:1000});
scrollorama.animate('.balloon_5',{ delay:3400, duration:800, property:'left',start:leftpoz7, end:0});
scrollorama.animate('.balloon_5',{ delay:3400, duration:800, property:'zoom', end:0});
scrollorama.animate('.people1',{ delay:1500, duration:800, property:'left',start:-300, end:leftpoz6});
scrollorama.animate('.people1',{ delay:1500, duration:800, property:'top',start:2382, end:2800});
scrollorama.animate('.people1',{ delay:1500, duration:800, property:'zoom', end:.6});
scrollorama.animate('.cloud1',{ duration:1300, property:'left',start:leftpoz8, end:0});
scrollorama.animate('.cloud1',{ duration:1300, property:'top',start:100, end:200});
scrollorama.animate('.cloud2',{ duration:1300, property:'left',start:0, end:rightpoz3});
scrollorama.animate('.cloud2',{ duration:1300, property:'top',start:1000, end:1100});
scrollorama.animate('.cloud4',{ delay:2600, duration:1500, property:'left',start:10, end:poz200});
});