Problems calculating rotation degrees - javascript

Got some math issues in my code that i can't figure out.
When you press on one of the red circles it should take the closest path (left or right) and rotate down to the bottom, it's kinda working, but there are a few issues with it.
e.g. If you start by pressing '8' and then '3', the container is only rotating 45 degrees in the wrong direction.
And the second issue is that the numbers are spinning around when the wheel is rotating.
Here is a jsfiddle to the code: https://jsfiddle.net/she4x2w6/10/
$('.item').click(function() {
var currentId = $('#container').data('id');
var nextId = $(this).data('id');
var currentRotation = (360 / items.length) * currentId - (360 / items.length);
var nextRotation = (360 / items.length) * nextId - (360 / items.length);
var deg;
if (currentRotation - nextRotation > 180 || nextRotation - currentRotation > 180) {
deg = nextRotation > 180 ? 360 - nextRotation : nextRotation - 360;
} else {
deg = -Math.abs(nextRotation);
}
var itemDeg = nextRotation <= 180 ? nextRotation : -Math.abs(360 - nextRotation);
$('#container').css({
transition: 'transform 0.6s',
transform: 'rotate(' + deg + 'deg)'
})
$('.item').css({
transition: 'transform 0.6s',
transform: 'rotate(' + itemDeg + 'deg)'
})


CSS rotate() function rotates an element to given angle while you are trying to rotate your element by a given angle.
rotate() -CSS | MDN
I had to change some of your approach to get it working:
var radius = 100; // adjust to move out items in and out
var items = $('.item'),
container = $('#container'),
width = container.width(),
height = container.height();
var angle = 0,
step = (2 * Math.PI) / items.length,
angle = Math.PI/2;
items.each(function() {
var x = Math.round(width / 2 + radius * Math.cos(angle) - $(this).width() / 2);
var y = Math.round(height / 2 + radius * Math.sin(angle) - $(this).height() / 2);
$(this).css({
left: x + 'px',
top: y + 'px'
});
angle += step;
});
$('#container').data('deg', 0);
$('.item').click(function() {
var currentId = $('#container').data('id');
var nextId = $(this).data('id');
var currentDeg =$('#container').data('deg');
var deg;
var degg = ((nextId+items.length-1)%items.length)*(360 / items.length);
if (degg>=180) {
deg = 360-degg;
} else {
deg = -degg;
}
var t = (currentDeg - deg) % 360;
if (t<0) {
t = 360+t;
}
if (t<180) {
deg = currentDeg-t;
} else {
deg = currentDeg+360-t;
}
var itemDeg = -deg;
var time = Math.abs(deg-currentDeg)/100;
$('#container').css({
transition: 'transform ' + time + 's',
transform: 'rotate(' + deg + 'deg)'
})
$('.item').css({
transition: 'transform ' + time + 's',
transform: 'rotate(' + itemDeg + 'deg)'
})
$('#container').data('id', nextId).data('deg', deg);
});
body {
padding: 2em;
}
#container {
width: 200px;
height: 200px;
margin: 10px auto;
border: 1px solid #000;
position: relative;
border-radius: 50%;
}
.item {
width: 30px;
height: 30px;
line-height: 30px;
text-align: center;
border-radius: 50%;
position: absolute;
background: #f00;
}
.item p {
margin: 0;
}
.active .item-content {
opacity: 1 !important;
transition: opacity ease 0.6s;
}
.item .item-content {
opacity: 0;
transition: opacity ease 0.3s;
margin: auto;
position: absolute;
width: 230px;
transform: translate(-50%);
left: 50%;
pointer-events: none;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" data-id="1">
<div data-id="1" class="item">1</div>
<div data-id="2" class="item">2</div>
<div data-id="3" class="item">3</div>
<div data-id="4" class="item">4</div>
<div data-id="5" class="item">5</div>
<div data-id="6" class="item">6</div>
<div data-id="7" class="item">7</div>
<div data-id="8" class="item">8</div>
<div data-id="9" class="item">9</div>
</div>

Related

Issues with ScaleX() on browser Zoom

When zooming in the browser, the scaleX() property is not staying consistent. TranslateX() works exactly as it should which is why I'm reaching out.
I am building out a stepped progress bar with the Web Animations API and Vanilla JS, the intention is that there will be a form inserted into this so as we step through form steps the animation/steps will show progress through it.
The issue I am encountering is when I am testing for ADA compliance, specifically when zooming in on the page. And even more specifically, it's only when the zoom percentage is not a multiple of 100. So 100, 200, 300, and 400% work perfectly. But 110, 125, 250%, just to name a few, are having issues. The dot that slides across the screen is working as it should.
The unexpected behavior is in the bar that expands across the screen along with the dot, sometimes it goes too far sometimes it doesn't go far enough. The thing that is really confusing me is that both the bar and the dot are both being "controlled" by the same measurements, which is taking the parent div's width and dividing by 3 and then multiplying by the current step. This is what leads me to assuming the issue is in the scaleX transform. I am still testing this overall in IE, encountering the issue in chrome and firefox.
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>My stepped progress bar</title>
<link href="style.css" type="text/css" rel="stylesheet" />
<link href="fonts.css" type="text/css" rel="stylesheet" />
<!-- Web Animation API polyfill-->
<script src="https://rawgit.com/web-animations/web-animations-js/master/web-animations.min.js"></script>
</head>
<body>
<section>
<div class="progress__container">
<div class="progress__bar">
<div id="progress__fill" class="step1"></div>
<div class="circ__container">
<div class="circ" id="circ__1"></div>
<div class="circ" id="circ__2"></div>
<div class="circ" id="circ__3"></div>
<div class="circ" id="circ__4"></div>
</div>
<div id="progress__dot" class="prog__1"></div>
</div>
<div class="backBar"></div>
<div class="flexrow">
<span class="stepName tab-1">Account</span>
<span class="stepName tab-2">Frequency</span>
<span class="stepName tab-3">Amount</span>
<span class="stepName tab-4">Taxes</span>
</div>
<div class="button__container">
<button class="buttonStep" id="back">Back</button>
<button class="buttonStep is-active" id="next">Next</button>
</div>
</div>
</section>
<script src="script-api.js"></script>
</body>
</html>
CSS:
/* General Styles */
body {
font-family: Arial, helvetica, sans-serif;
}
/* Slider Bar Animation */
#progress__fill {
height:2px;
position: absolute;
top: 7px;
left: 0;
background-color: darkred;
width: 1px;
}
#progress__dot {
background-color: darkred;
color: #fff;
border-radius: 50%;
height: 8px;
width: 8px;
position: absolute;
text-align:center;
line-height: 8px;
padding: 6px;
top: 0;
font-size: 12px;
}
/* Static Bar Elements */
.progress__container {
width: 600px;
margin: 20px auto;
position: relative;
}
.backBar {
height:2px;
width:96%;
position: absolute;
top: 7px;
left: 2%;
background-color: lightgrey;
}
.progress__bar {
z-index: 100;
position: relative;
width: 96%;
margin: 0 auto;
}
.circ {
background-color: #fff;
border: 2px solid lightgrey;
border-radius: 50%;
height: 8px;
width: 8px;
display: inline-block;
position: absolute;
}
.hide {
visibility: hidden
}
.flexrow {
display: flex;
flex-direction: row;
justify-content: space-between;
}
.circ__container {
padding-top: 3px;
}
.flexrow {
margin-top: 20px;
}
.stepName {
font-size: 12px;
text-align: center;
}
.stepName:first-child {
text-align: left;
}
.stepName:last-child {
text-align: right;
}
.stepName.bold {
font-weight: 600;
}
/* Buttons */
.button__container {
padding-top: 100px;
}
.buttonStep {
background: grey;
color: #fff;
padding: 10px 25px;
border-radius: 10px;
font-size: 16px;
}
#back {
float: left;
}
#next {
float: right;
}
.is-active {
background: darkred;
}
JS:
// give a starting value for the transformation
var slideBarWidth = 0,
slideBarScalePoint = 0,
currentStep = 1,
dot = document.getElementById('progress__dot'),
boxWidth = dot.parentElement.offsetWidth;
// insert the current step number into the progress dot
dot.innerHTML = currentStep;
// place the background dots on the bar
for (var x = 1; x < 5; x++) {
document.getElementById('circ__' + x).setAttribute('style', 'left: ' + ((boxWidth / 3) * (x - 1)) + 'px');
if (x == 4) {
document.getElementById('circ__' + x).setAttribute('style', 'left: ' + (((boxWidth / 3) * (x - 1)) - document.getElementById('circ__' + x).offsetWidth)+ 'px');
}
}
// define the timing for progress dot
var dotTiming = {
duration: 500,
fill: "both",
easing: 'ease-in-out'
}
// define the timing for sliding bar
var barTiming = {
duration: 500,
fill: "both",
easing: 'ease-in-out'
}
var passedTiming = {
fill: "both"
}
// make the first step name bold
document.getElementsByClassName('tab-' + currentStep)[0].classList.add('bold');
// on click fire the animation
document.getElementById('next').addEventListener('click', function() {
// make sure the slider does not go further than it should
if (currentStep > 3){return;}
// define the keyframes for the progress dot
if (currentStep == 3) {
var moveDot = [
{transform: 'translateX(' + ((boxWidth / 3) * (currentStep - 1)) + 'px)'},
{transform: 'translateX(' + (((boxWidth / 3) * (currentStep)) - dot.offsetWidth) + 'px)'}
];
} else {
var moveDot = [
{transform: 'translateX(' + ((boxWidth / 3) * (currentStep - 1)) + 'px)'},
{transform: 'translateX(' + ((boxWidth / 3) * (currentStep)) + 'px)'},
];
}
// define the keyframes for the sliding bar
var slideBar = [
{
transform: 'scaleX(' + ((boxWidth / 3) * (currentStep - 1)) + ')',
transformOrigin: 'left'
},
{
transform: 'scaleX(' + ((boxWidth / 3) * (currentStep)) + ')',
transformOrigin: 'left'
}
];
var showDot = [
{backgroundColor: '#fff', border: '2px solid lightgrey' },
{backgroundColor: 'darkred', border: '2px solid darkred' }
];
// putting the keyframes and timings together (progress dot)
var movingDot = document.getElementById("progress__dot").animate(
moveDot,
dotTiming
);
// putting the keyframes and timings together (sliding bar)
var slidingBar = document.getElementById("progress__fill").animate(
slideBar,
barTiming
);
var passingDot = document.getElementById('circ__' + currentStep).animate(
showDot,
passedTiming
);
// making the animation play forwards
movingDot.playbackRate = 1;
slidingBar.playbackRate = 1;
passingDot.playbackRate = 1;
// starting the animations
movingDot.play();
slidingBar.play();
movingDot.onfinish = passingDot;
// incrementing and setting the step counter
currentStep++;
document.getElementById("progress__dot").innerHTML = currentStep;
if (currentStep > 1) {
document.getElementById('back').classList.add('is-active');
}
if (currentStep > 3) {
document.getElementById('next').classList.remove('is-active');
}
// toggling the bold class for the step names
document.getElementsByClassName('tab-' + (currentStep - 1))[0].classList.remove('bold');
setTimeout(() =>
{
document.getElementsByClassName('tab-' + currentStep)[0].classList.add('bold');
}, 600);
});
document.getElementById('back').addEventListener('click', function() {
// make sure the slider does not go back past the beginning
if (currentStep < 2){return;}
// define the keyframes
if (currentStep == 4) {
var moveDot = [
{transform: 'translateX(' + ((boxWidth / 3) * (currentStep - 2)) + 'px)'},
{transform: 'translateX(' + (((boxWidth / 3) * (currentStep - 1)) - dot.offsetWidth) + 'px)'}
];
} else {
var moveDot = [
{transform: 'translateX(' + ((boxWidth / 3) * (currentStep - 2)) + 'px)'},
{transform: 'translateX(' + ((boxWidth / 3) * (currentStep - 1)) + 'px)'}
];
}
var slideBar = [
{
transform: 'scaleX(' + ((boxWidth / 3) * (currentStep - 2)) + ')',
transformOrigin: 'left'
},
{
transform: 'scaleX(' + ((boxWidth / 3) * (currentStep -1 )) + ')',
transformOrigin: 'left'
}
];
var showDot = [
{backgroundColor: 'darkred', border: '2px solid darkred' },
{backgroundColor: '#fff', border: '2px solid lightgrey' }
];
// putting the keyframes and timings together
var movingDot = document.getElementById("progress__dot").animate(
moveDot,
dotTiming
);
var slidingBar = document.getElementById("progress__fill").animate(
slideBar,
barTiming
);
var passingDot = document.getElementById('circ__' + currentStep).animate(
showDot,
passedTiming
);
// making the animation reverse
movingDot.playbackRate = -1;
slidingBar.playbackRate = -1;
passingDot.playbackrate = -1;
// starting the animation
movingDot.play();
slidingBar.play();
movingDot.onfinish = passingDot;
// decrementing and setting the step counter
currentStep--;
// set the current step number as the number in the progress dot on the page
document.getElementById("progress__dot").innerHTML = currentStep;
if (currentStep < 4) {
document.getElementById('next').classList.add('is-active');
}
if (currentStep < 2) {
document.getElementById('back').classList.remove('is-active');
}
// toggling the bold class for the step names
document.getElementsByClassName('tab-' + (currentStep + 1))[0].classList.remove('bold');
setTimeout(() =>
{
document.getElementsByClassName('tab-' + currentStep)[0].classList.add('bold');
}, 400);
});
I expect the dot and the slider to be aligned as they go across the page, regardless of zoom percentage

In doing some experimenting, I figured out that I could just use "width" to transform the item rather than scaleX. Here is what I ended up using:
next button event:
var slideBar = [
{
width: ((boxWidth / 3) * (currentStep - 1)) + 'px'
},
{
width: ((boxWidth / 3) * (currentStep)) + 'px'
}
];
back button event:
var slideBar = [
{
width: ((boxWidth / 3) * (currentStep - 2)) + 'px'
},
{
width: ((boxWidth / 3) * (currentStep -1 )) + 'px'
}
];

How to switch between transform-origin and scrollbars

I have this code above who switch between CSS transform-origin and scale to CSS width and scrollbars.
I need to make this switch because I am having a pinch to zoom for a DIV wrap I'm using in my website.
I'm using CSS translateX and translateY and Scale for a smoother pinch zoom, but after the zoom take place, I need to return back to width and scrollbar so the user can move across the layout.
I have here an example of how I'm doing the switch and there is a bit margin on top that I can't really set mind my on.
what is the correct way to do so?
var isOrigin = false;
var originX = 500;
var originY = 200;
var scale = 1.5;
var deltaX = 0;
var deltaY = 0;
var from_origin_to_scroll = function () {
if (isOrigin) { from_scroll_to_origin(); return; }
var wrap = $('.containter .wrap');
//reset scroll
const el = document.scrollingElement || document.documentElement;
$('.containter')[0].scrollLeft = 0;
el.scrollTop = 0;
wrap.css({
transformOrigin: originX + "px " + originY + "px",
transform: "translate3d(" + deltaX + "px," + deltaY + "px, 0) " +
"scale3d(" + scale + "," + scale + ", 1) ",
width: 100 + '%'
});
isOrigin = true;
$('.info').html('layout set by origin and scale');
}
var from_scroll_to_origin = function () {
var wrap = $('.containter .wrap');
wrap.css({
transformOrigin: originX + "px " + originY + "px",
transform: "translate3d(" + 0 + "px," + 0 + "px, 0) " +
"scale3d(" + 1 + "," + 1 + ", 1) ",
width: (100 * scale) + '%'
});
$('.containter')[0].scrollLeft = originX * (scale - 1);
const el = document.scrollingElement || document.documentElement;
el.scrollTop = originY * (scale - 1);
isOrigin = false;
$('.info').html('layout set by width and scroll');
}
body {
margin: 0;
padding: 0;
overflow-x: auto;
-webkit-overflow-scrolling: touch;
width:100vw;
}
.top{
position: fixed;
width: 100%;
background-color: #333;
line-height: 40pt;
text-align: center;
color: #f1f1f1;
font-size: 20pt;
left: 0;
top: 0;
z-index: 10;
}
.top .info{
}
.header_content
{
background-color: #e1e1e1;
line-height:130pt;
}
.containter {
width:100%;
box-sizing: border-box;
overflow: auto;
-webkit-overflow-scrolling: touch;
}
.containter .wrap {
display: flex;
flex-direction: column;
width: 100%;
}
.containter .wrap img {
width: 100%;
margin-top: 30pt;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="top">
<div class="info" onclick="from_origin_to_scroll()">click to switch</div>
</div>
<div class="header_content">
this is a header content - needs to be added to overall calculation
</div>
<div class="containter">
<div class="wrap">
<img src="https://thumb7.shutterstock.com/display_pic_with_logo/91858/594887747/stock-photo-dreams-of-travel-child-flying-on-a-suitcase-against-the-backdrop-of-sunset-594887747.jpg" />
<img src="https://thumb9.shutterstock.com/display_pic_with_logo/1020994/556702975/stock-photo-portrait-of-a-happy-and-proud-pregnant-woman-looking-at-her-belly-in-a-park-at-sunrise-with-a-warm-556702975.jpg" />
<img src="https://thumb7.shutterstock.com/display_pic_with_logo/234100/599187701/stock-photo-funny-little-girl-plays-super-hero-over-blue-sky-background-superhero-concept-599187701.jpg" />
<img src="https://thumb1.shutterstock.com/display_pic_with_logo/1316512/661476343/stock-photo-funny-pineapple-in-sunglasses-near-swimming-pool-661476343.jpg" />
<img src="https://thumb1.shutterstock.com/display_pic_with_logo/2114402/689953639/stock-photo-adult-son-hugging-his-old-father-against-cloudy-sky-with-sunshine-689953639.jpg" />
<img src="https://thumb7.shutterstock.com/display_pic_with_logo/172762/705978841/stock-photo-businessman-looking-to-the-future-for-new-business-opportunity-705978841.jpg" />
</div>
</div>

In your case the possible solution is to detect when the user is trying to zoom, and when just to scroll.
const $container = $(".container");
$container.on('touchstart', function (e) {
if (e.touches.length > 1){
//more than one finger is detected on the screen,
//change mode to transform-origin
from_scroll_to_origin()
}
});
$container.on('touchend', function (e) {
//change mode to scrollbars
from_origin_to_scroll()
});

Center div Vertical/Horizontal without flexbox

/**
* tiltfx.js
* http://www.codrops.com
*
* Licensed under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*
* Copyright 2015, Codrops
* http://www.codrops.com
*/
;
(function(window) {
'use strict';
/**
* **************************************************************************
* utils
* **************************************************************************
*/
// from https://gist.github.com/desandro/1866474
var lastTime = 0;
var prefixes = 'webkit moz ms o'.split(' ');
// get unprefixed rAF and cAF, if present
var requestAnimationFrame = window.requestAnimationFrame;
var cancelAnimationFrame = window.cancelAnimationFrame;
// loop through vendor prefixes and get prefixed rAF and cAF
var prefix;
for (var i = 0; i < prefixes.length; i++) {
if (requestAnimationFrame && cancelAnimationFrame) {
break;
}
prefix = prefixes[i];
requestAnimationFrame = requestAnimationFrame || window[prefix + 'RequestAnimationFrame'];
cancelAnimationFrame = cancelAnimationFrame || window[prefix + 'CancelAnimationFrame'] ||
window[prefix + 'CancelRequestAnimationFrame'];
}
// fallback to setTimeout and clearTimeout if either request/cancel is not supported
if (!requestAnimationFrame || !cancelAnimationFrame) {
requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() {
callback(currTime + timeToCall);
}, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
cancelAnimationFrame = function(id) {
window.clearTimeout(id);
};
}
function extend(a, b) {
for (var key in b) {
if (b.hasOwnProperty(key)) {
a[key] = b[key];
}
}
return a;
}
// from http://www.quirksmode.org/js/events_properties.html#position
function getMousePos(e) {
var posx = 0;
var posy = 0;
if (!e) var e = window.event;
if (e.pageX || e.pageY) {
posx = e.pageX;
posy = e.pageY;
} else if (e.clientX || e.clientY) {
posx = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
posy = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
}
return {
x: posx,
y: posy
}
}
// from http://www.sberry.me/articles/javascript-event-throttling-debouncing
function throttle(fn, delay) {
var allowSample = true;
return function(e) {
if (allowSample) {
allowSample = false;
setTimeout(function() {
allowSample = true;
}, delay);
fn(e);
}
};
}
/***************************************************************************/
/**
* TiltFx fn
*/
function TiltFx(el, options) {
this.el = el;
this.options = extend({}, this.options);
extend(this.options, options);
this._init();
this._initEvents();
}
/**
* TiltFx options.
*/
TiltFx.prototype.options = {
// number of extra image elements (div with background-image) to add to the DOM - min:1, max:5 (for a higher number, it's recommended to remove the transitions of .tilt__front in the stylesheet.
extraImgs: 2,
// the opacity value for all the image elements.
opacity: 0.7,
// by default the first layer does not move.
bgfixed: true,
// image element's movement configuration
movement: {
perspective: 1000, // perspective value
translateX: -10, // a relative movement of -10px to 10px on the x-axis (setting a negative value reverses the direction)
translateY: -10, // a relative movement of -10px to 10px on the y-axis
translateZ: 20, // a relative movement of -20px to 20px on the z-axis (perspective value must be set). Also, this specific translation is done when the mouse moves vertically.
rotateX: 2, // a relative rotation of -2deg to 2deg on the x-axis (perspective value must be set)
rotateY: 2, // a relative rotation of -2deg to 2deg on the y-axis (perspective value must be set)
rotateZ: 0 // z-axis rotation; by default there's no rotation on the z-axis (perspective value must be set)
}
}
/**
* Initialize: build the necessary structure for the image elements and replace it with the HTML img element.
*/
TiltFx.prototype._init = function() {
this.tiltWrapper = document.createElement('div');
this.tiltWrapper.className = 'tilt';
// main image element.
this.tiltImgBack = document.createElement('div');
this.tiltImgBack.className = 'tilt__back';
this.tiltImgBack.style.backgroundImage = 'url(' + this.el.src + ')';
this.tiltWrapper.appendChild(this.tiltImgBack);
// image elements limit.
if (this.options.extraImgs < 1) {
this.options.extraImgs = 1;
} else if (this.options.extraImgs > 5) {
this.options.extraImgs = 5;
}
if (!this.options.movement.perspective) {
this.options.movement.perspective = 0;
}
// add the extra image elements.
this.imgElems = [];
for (var i = 0; i < this.options.extraImgs; ++i) {
var el = document.createElement('div');
el.className = 'tilt__front';
el.style.backgroundImage = 'url(' + this.el.src + ')';
el.style.opacity = this.options.opacity;
this.tiltWrapper.appendChild(el);
this.imgElems.push(el);
}
if (!this.options.bgfixed) {
this.imgElems.push(this.tiltImgBack);
++this.options.extraImgs;
}
// add it to the DOM and remove original img element.
this.el.parentNode.insertBefore(this.tiltWrapper, this.el);
this.el.parentNode.removeChild(this.el);
// tiltWrapper properties: width/height/left/top
this.view = {
width: this.tiltWrapper.offsetWidth,
height: this.tiltWrapper.offsetHeight
};
};
/**
* Initialize the events on the main wrapper.
*/
TiltFx.prototype._initEvents = function() {
var self = this,
moveOpts = self.options.movement;
// mousemove event..
this.tiltWrapper.addEventListener('mousemove', function(ev) {
requestAnimationFrame(function() {
// mouse position relative to the document.
var mousepos = getMousePos(ev),
// document scrolls.
docScrolls = {
left: document.body.scrollLeft + document.documentElement.scrollLeft,
top: document.body.scrollTop + document.documentElement.scrollTop
},
bounds = self.tiltWrapper.getBoundingClientRect(),
// mouse position relative to the main element (tiltWrapper).
relmousepos = {
x: mousepos.x - bounds.left - docScrolls.left,
y: mousepos.y - bounds.top - docScrolls.top
};
// configure the movement for each image element.
for (var i = 0, len = self.imgElems.length; i < len; ++i) {
var el = self.imgElems[i],
rotX = moveOpts.rotateX ? 2 * ((i + 1) * moveOpts.rotateX / self.options.extraImgs) / self.view.height * relmousepos.y - ((i + 1) * moveOpts.rotateX / self.options.extraImgs) : 0,
rotY = moveOpts.rotateY ? 2 * ((i + 1) * moveOpts.rotateY / self.options.extraImgs) / self.view.width * relmousepos.x - ((i + 1) * moveOpts.rotateY / self.options.extraImgs) : 0,
rotZ = moveOpts.rotateZ ? 2 * ((i + 1) * moveOpts.rotateZ / self.options.extraImgs) / self.view.width * relmousepos.x - ((i + 1) * moveOpts.rotateZ / self.options.extraImgs) : 0,
transX = moveOpts.translateX ? 2 * ((i + 1) * moveOpts.translateX / self.options.extraImgs) / self.view.width * relmousepos.x - ((i + 1) * moveOpts.translateX / self.options.extraImgs) : 0,
transY = moveOpts.translateY ? 2 * ((i + 1) * moveOpts.translateY / self.options.extraImgs) / self.view.height * relmousepos.y - ((i + 1) * moveOpts.translateY / self.options.extraImgs) : 0,
transZ = moveOpts.translateZ ? 2 * ((i + 1) * moveOpts.translateZ / self.options.extraImgs) / self.view.height * relmousepos.y - ((i + 1) * moveOpts.translateZ / self.options.extraImgs) : 0;
el.style.WebkitTransform = 'perspective(' + moveOpts.perspective + 'px) translate3d(' + transX + 'px,' + transY + 'px,' + transZ + 'px) rotate3d(1,0,0,' + rotX + 'deg) rotate3d(0,1,0,' + rotY + 'deg) rotate3d(0,0,1,' + rotZ + 'deg)';
el.style.transform = 'perspective(' + moveOpts.perspective + 'px) translate3d(' + transX + 'px,' + transY + 'px,' + transZ + 'px) rotate3d(1,0,0,' + rotX + 'deg) rotate3d(0,1,0,' + rotY + 'deg) rotate3d(0,0,1,' + rotZ + 'deg)';
}
});
});
// reset all when mouse leaves the main wrapper.
this.tiltWrapper.addEventListener('mouseleave', function(ev) {
setTimeout(function() {
for (var i = 0, len = self.imgElems.length; i < len; ++i) {
var el = self.imgElems[i];
el.style.WebkitTransform = 'perspective(' + moveOpts.perspective + 'px) translate3d(0,0,0) rotate3d(1,1,1,0deg)';
el.style.transform = 'perspective(' + moveOpts.perspective + 'px) translate3d(0,0,0) rotate3d(1,1,1,0deg)';
}
}, 60);
});
// window resize
window.addEventListener('resize', throttle(function(ev) {
// recalculate tiltWrapper properties: width/height/left/top
self.view = {
width: self.tiltWrapper.offsetWidth,
height: self.tiltWrapper.offsetHeight
};
}, 50));
};
function init() {
// search for imgs with the class "tilt-effect"
[].slice.call(document.querySelectorAll('img.tilt-effect')).forEach(function(img) {
new TiltFx(img, JSON.parse(img.getAttribute('data-tilt-options')));
});
}
init();
window.TiltFx = TiltFx;
})(window);
.tilt {
overflow: hidden;
position: relative;
width: 100%;
height: 100%;
margin: 0 auto;
}
.tilt__back {
position: relative;
}
.tilt__front {
position: absolute;
top: 0;
left: 0;
}
.tilt__back,
.tilt__front {
width: 100%;
height: 100%;
background-position: 50% 50%;
background-repeat: no-repeat;
background-size: cover;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
}
<div class="megawrapper">
<div class="w-section home-page" style="transform: translateX(0px) translateY(0px);">
<div class="home_logo" style="pointer-events:none;"></div>
<div class="home_centralarea" data-ix="home-darkfield" style="opacity: 1; transition: opacity 500ms;">
<div class="home_parallaxpic_wrapper">
<div class="home_parallaxpic" data-ix="home-parallaxpic" style="opacity: 0.4; transition: opacity 1000ms;">
<img class="hero__img tilt-effect" data-tilt-options='{ "extraImgs":3, "bgfixed":false, "opacity" : 0.5, "movement": { "perspective" : 1200, "translateX" : -5, "translateY" : -5, "rotateX" : -5, "rotateY" : -5 } }' src="<?php echo get_template_directory_uri(); ?>/images/road.jpeg"
/>
</div>
</div>
</div>
</div>
</div>
I want to replicate HTML structure of this website (www.danielspatzek.com/). But I cant get my divs to center properly. The website has two main divs, .home-page which contains the fully stretched background image and .tilt which injects the tiltfx effect on the background image. The div .tilt has a scaled down height/width due to a padding of 60px applied on it by its parent div .home-page
I replicated the HTML structure but when I apply the 60px padding in .home-page all divs get pushed right/down and is no longer centered.
The original website html is:
<div class="megawrapper">
<div class="w-section home-page" style="transform: translateX(0px) translateY(0px);">
<div class="home_logo" style="pointer-events:none;"></div>
<div class="home_centralarea" data-ix="home-darkfield" style="opacity: 1; transition: opacity 500ms;">
<div class="home_parallaxpic_wrapper">
<div class="home_parallaxpic" data-ix="home-parallaxpic" style="opacity: 0.4; transition: opacity 1000ms;">
<img class="hero__img tilt-effect" data-tilt-options='{ "extraImgs":3, "bgfixed":false, "opacity" : 0.5, "movement": { "perspective" : 1200, "translateX" : -5, "translateY" : -5, "rotateX" : -5, "rotateY" : -5 } }' src="<?php echo get_template_directory_uri(); ?>/images/road.jpeg" />
</div>
</div>
</div>
</div>
</div>
The javascript file tiltfx.js removes .tilt-effect and replaces it with .tilt so the HTML is:
<div class="megawrapper">
<div class="w-section home-page" style="transform: translateX(0px) translateY(0px);">
<div class="home_logo" style="pointer-events:none;"></div>
<div class="home_centralarea" data-ix="home-darkfield" style="opacity: 1; transition: opacity 0ms;">
<div class="home_parallaxpic_wrapper">
<div class="home_parallaxpic" data-ix="home-parallaxpic" style="opacity: 0.4; transition: opacity 0ms;">
<div class="tilt"><div class="tilt__back" style="background-image: url("http://www.danielspatzek.com/themes/Theme/images/bg_home_street.jpg"); transform: perspective(1200px) translate3d(0.787151px, -0.0129973px, 0px) rotate3d(1, 0, 0, -0.0129973deg) rotate3d(0, 1, 0, 0.787151deg) rotate3d(0, 0, 1, 0deg);"></div>
</div>
</div>
</div>
</div>
My recreation HTML and CSS looks like this:
<div class="megawrapper">
<div class="home-page" style="transform: translateX(0px) translateY(0px);">
<img class="tilt-effect" data-tilt-options='{ "extraImgs":3, "bgfixed":false, "opacity" : 0.5, "movement": { "perspective" : 1200, "translateX" : -5, "translateY" : -5, "rotateX" : -5, "rotateY" : -5 } }' src="<?php echo get_template_directory_uri(); ?>/images/road.jpeg" />
</div>
.megawrapper {
position: absolute;
overflow-x: hidden;
overflow-y: hidden;
width: 100%;
height: 100%;
}
.home-page {
position: absolute;
z-index: 0;
width: 100%;
height: 100%;
background-color: #3c3c3e;
background-image: url(images/road.jpeg);
background-position: 50% 50%;
background-size: cover;
background-repeat: no-repeat;
}
.tilt {
overflow: hidden;
position: relative;
width: 100%;
height: 100%;
margin: 0 auto;
}
.tilt__back {
position: relative;
}
.tilt__front {
position: absolute;
top: 0;
left: 0;
}
.tilt__back, .tilt__front {
width: 100%;
height: 100%;
background-position: 50% 50%;
background-repeat: no-repeat;
background-size: cover;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
}
I cant seem to get the same layout as the website. I dont know why .tilt would not center properly when I apply padding of 60 px on .home-page. I dont want to use flexbox to achieve the same result

use box-sizing:border-box; on your .home_page it will work fine.I'm added the snippet below.
html,body{
width:100%;
height:100%;
}
.home_page{
width:100%;
height:100%;
background-color:#3c3c3e;
background-image: url(https://i.stack.imgur.com/wwy2w.jpg);
background-position: 50% 50%;
background-size: cover;
background-repeat: no-repeat;
padding:60px;
box-sizing:border-box;
}
.tilt {
overflow: hidden;
position: relative;
width: 100%;
height: 100%;
margin: 0 auto;
background-color:yellow;
}
<div class="home_page">
<div class="tilt"></div>
</div>

Here is a good way.
<div class="divToCenterStuffIn">
<div class="vertCenter">
Vertical Center
</div>
</div>
<div class="divToCenterStuffIn">
<div class="horzCenter">
Horizontal Center
</div>
</div>
<div class="divToCenterStuffIn">
<div class="trueCenter">
True Center
</div>
</div>
.divToCenterStuffIn {
position: relative;
display: block;
width: 10rem;
height: 10rem;
}
.vertCenter
{
position: absolute;
display: block;
top:50%;
-ms-transform: translateY(-50%);
-moz-transform: translateY(-50%);
-webkit-transform: translateY(-50%);
transform: translateY(-50%);
}
.horzCenter
{
position: absolute;
display: block;
left: 50%;
-ms-transform: translateX(-50%);
-moz-transform: translateX(-50%);
-webkit-transform: translateX(-50%);
transform: translateX(-50%);
}
.trueCenter {
position: absolute;
display: block;
left: 50%;
top: 50%;
-ms-transform: translate(-50%, -50%);
-moz-transform: translate(-50%, -50%);
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
}

Rotate image follow mouse jquery with smooth transition

I am trying to make an image rotate when you hover over certain items on the page. It uses the solution provided here (with edits for my purposes): https://stackoverflow.com/a/10235298. You can see an example of what I am trying to achieve here: https://jsfiddle.net/t100gq25/
$(function () {
var img = $('.arrow');
if (img.length > 0) {
var offset = img.offset();
$('.animation-trigger').mouseenter(function (event) {
var element = $(this);
var elementPosition = element.offset();
var elementX = elementPosition.left + (element.width() / 2);
var elementY = elementPosition.top + (element.height() / 2);
var imgX = offset.left + (img.width() / 2);
var imgY = offset.top + (img.height() / 2);
var radians = Math.atan2(elementX - imgX, elementY - imgY);
var degrees = (radians * (180 / Math.PI) * -1) + 90;
img.css('-moz-transform', 'rotate(' + degrees + 'deg)')
.css('-webkit-transform', 'rotate(' + degrees + 'deg)')
.css('-o-transform', 'rotate(' + degrees + 'deg)')
.css('-ms-transform', 'rotate(' + degrees + 'deg)');
});
}
});
body {
padding-top: 150px;
}
.container {
height: 500px;
}
.menu-1,
.menu-2,
.menu-3,
.menu-4 {
position: absolute;
z-index: 99
}
.menu-1 {
top: 20%;
left: 20%;
}
.menu-2 {
top: 20%;
right: 20%;
}
.menu-3 {
bottom: 20%;
left: 20%;
}
.menu-4 {
bottom: 20%;
right: 20%;
}
.arrow {
position: absolute;
top: 50%;
left: 50%;
margin-top: -100px;
margin-left: -100px;
height: 200px;
width: 200px;
-webkit-transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
-moz-transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
-o-transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<a href="#" class="menu-1">
<img src="http://placehold.it/140x35&text=4" class="animation-trigger">
</a>
<a href="#" class="menu-2">
<img src="http://placehold.it/140x35&text=1" class="animation-trigger">
</a>
<a href="#" class="menu-3">
<img src="http://placehold.it/140x35&text=3" class="animation-trigger">
</a>
<a href="#" class="menu-4">
<img src="http://placehold.it/140x35&text=2" class="animation-trigger">
</a>
<img src="https://image.freepik.com/free-icon/arrow-full-shape-pointing-to-right-direction_318-32063.png" class="arrow">
It works great! However if you hover over link 1, the arrow will turn to it and then you decide to hover over link 4 and the arrow will again point to it. However it goes all the way around (clockwise) instead of taking the short route of just spinning back(anti-clockwise).
I've had a go at a few attempts but none have worked and if I come up with an idea that could work it's extremely long winded. I'm struggling to work out the best way to approach this so any help would be very much appreciated.
Please note the jsfiddle is a quick mock up example of what I am trying to achieve. Unfortunately I cannot share the actual source code due to client confidentiality. Any solutions provided I will apply to the final site.
Many thanks:)

You will need to store all elements degrees and check if arrow needs to rotate clockwise or anti-clockwise for shortest rotation.
$(function() {
var img = $('.arrow');
// Store clock wise degrees of all elements
var clockwiseElemDegrees = {};
var currentArrowAngle = 0;
// Treat initial position of arrow as element 0
var prevElem = '0';
clockwiseElemDegrees['0'] = 0;
if (img.length > 0) {
var offset = img.offset();
var imgX = offset.left + (img.width() / 2);
var imgY = offset.top + (img.height() / 2);
// Get element degrees
$('.animation-trigger').each(function() {
var element = $(this);
var elementPosition = element.offset();
var elementX = elementPosition.left + (element.width() / 2);
var elementY = elementPosition.top + (element.height() / 2);
var radians = Math.atan2(elementY - imgY, elementX - imgX);
var degrees = radians * (180 / Math.PI);
clockwiseElemDegrees[element.attr('elem')] = (degrees < 0) ? (degrees + 360) : degrees;
});
$('.animation-trigger').mouseenter(function(event) {
// Check if arrow should be rotated clockwise
var clockwiseDegreesForNextElem = clockwiseElemDegrees[$(this).attr('elem')];
var clockwiseDegreesForPrevElem = clockwiseElemDegrees[prevElem];
if (clockwiseDegreesForNextElem < clockwiseDegreesForPrevElem)
clockwiseDegreesForNextElem += 360;
var clockwiseRotationRequired = clockwiseDegreesForNextElem - clockwiseDegreesForPrevElem;
if (clockwiseRotationRequired <= 180) {
// Do clockwise rotation
currentArrowAngle += clockwiseRotationRequired;
} else {
// Do anticlockwise rotation
currentArrowAngle -= (360 - clockwiseRotationRequired);
}
prevElem = $(this).attr('elem');
img.css('-moz-transform', 'rotate(' + currentArrowAngle + 'deg)')
.css('-webkit-transform', 'rotate(' + currentArrowAngle + 'deg)')
.css('-o-transform', 'rotate(' + currentArrowAngle + 'deg)')
.css('-ms-transform', 'rotate(' + currentArrowAngle + 'deg)');
});
}
});
body {
padding-top: 150px;
}
.container {
height: 500px;
}
.menu-1,
.menu-2,
.menu-3,
.menu-4 {
position: absolute;
z-index: 99
}
.menu-1 {
top: 20%;
left: 20%;
}
.menu-2 {
top: 20%;
right: 20%;
}
.menu-3 {
bottom: 20%;
left: 20%;
}
.menu-4 {
bottom: 20%;
right: 20%;
}
.arrow {
position: absolute;
top: 50%;
left: 50%;
margin-top: -100px;
margin-left: -100px;
height: 200px;
width: 200px;
-webkit-transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
-moz-transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
-o-transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
transition: all 400ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<a href="#" class="menu-1">
<img src="http://placehold.it/140x35&text=4" class="animation-trigger" elem="1">
</a>
<a href="#" class="menu-2">
<img src="http://placehold.it/140x35&text=1" class="animation-trigger" elem="2">
</a>
<a href="#" class="menu-3">
<img src="http://placehold.it/140x35&text=3" class="animation-trigger" elem="3">
</a>
<a href="#" class="menu-4">
<img src="http://placehold.it/140x35&text=2" class="animation-trigger" elem="4">
</a>
<img src="https://image.freepik.com/free-icon/arrow-full-shape-pointing-to-right-direction_318-32063.png" class="arrow">

Rotating an image when user scrolls up and down the screen

I am fairly new to writing in html, css, and coding in javascript.
I digress; i am trying to have an image of a gear rotate when the a user scrolls up and down the screen (i am hoping to give it an elevator effect when i add a belt).
I am using the jquery $(window).scroll(function(). I know it is working because when i use console.log("hi") it writes every time i scroll. My problem is the .animate() function that doesn't seem to work. I even tried downloading "http://jqueryrotate.com/" and using that to rotate.
Any help would be much appreciated!
## HTML ##
<div class="left_pulley">
<img src="gear2.png" />
</div>
<div class="right_pulley">
<img src="gear2.png" />
</div>
## CSS ##
.left_pulley
{
position: absolute;
margin: 0;
padding: 0;
top: 263px;
left: 87%;
height: 35px;
width: 35px;
}
.left_pulley img
{
width: 100%;
}
.right_pulley
{
position: absolute;
margin: 0;
padding: 0;
top: 263px;
left: 94.2%;
height: 35px;
width: 35px;
}
.right_pulley img
{
width: 100%;
}
## JS ##
First using .rotate({})
$(".left_pulley").rotate({bind:
$(window).scroll(function() {
if ($(this).scrollTop() > 0) {
$(.left_pulley).rotate({
angle: 0,
animateTo: 180,
})
})
})
})
Now using .animate({}) to try and just move it at all.
$(window).scroll(function() {
if ($(this).scrollTop() > 0) {
var scott = $('img');
scott.animate({
left: 180
}
}
});
$(window).scroll(function() {
if ($(this).scrollTop() > 0) {
var scott = $('img');
scott.animate({
left: 180
}
function() {
console.log("hi");
}
});
console.log("hi2");
}
});
.left_pulley {
position: absolute;
margin: 0;
padding: 0;
top: 263px;
left: 87%;
height: 35px;
width: 35px;
}
.left_pulley img {
width: 100%;
}
.right_pulley {
position: absolute;
margin: 0;
padding: 0;
top: 263px;
left: 94.2%;
height: 35px;
width: 35px;
}
.right_pulley img {
width: 100%;
}
<div class="left_pulley">
<img src="gear2.png" />
</div>
<div class="right_pulley">
<img src="gear2.png" />
</div>
[
picture of gears i want to rotate.
]1

You should look into the CSS3 transform property, more specifically the rotate() function. Here
It would also be beneficial to add a transistion property to create an animated 'tween' between rotation values. Here. Make sure to add this transition to the transition property (as this is where rotation is set).\
You can then change the rotation of the gear (with automatic animation!) using jquery by setting the css value of the transition property, for example:
#gear{
transition: transform 300ms;
transform: rotate(7deg);
transform-origin:90% 90%;
position:absolute;
left:100px;
top:100px;
font-size:10rem;
width:100px;
height:100px;
}
You can test it out here by hitting run.
https://jsfiddle.net/oc4hhons/

Borrowing heavily from https://stackoverflow.com/a/17348698/2026508
You could do something like this:
var degrees = 0;
var prevScroll = 0;
$(window).scroll(function() {
if ($(window).scrollTop() > 0) {
if (prevScroll > $(window).scrollTop()) {
$('.woo').css({
'-webkit-transform': 'rotate(' + degrees+++'deg)',
'-moz-transform': 'rotate(' + degrees+++'deg)',
'-ms-transform': 'rotate(' + degrees+++'deg)',
'transform': 'rotate(' + degrees+++'deg)'
});
console.log('prevScroll greater:', prevScroll)
} else if (prevScroll < $(window).scrollTop()) {
$('.woo').css({
'-webkit-transform': 'rotate(' + degrees--+'deg)',
'-moz-transform': 'rotate(' + degrees--+'deg)',
'-ms-transform': 'rotate(' + degrees--+'deg)',
'transform': 'rotate(' + degrees--+'deg)'
});
console.log('prevScroll less:', prevScroll)
}
prevScroll = $(window).scrollTop()
}
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div style="height: 40px; width: 100px;background-image: url(' gear2.png ');background-color:blue;" class="woo">turn</div>

JS Fiddle-Updated, now they rotate together same direction but the rotation is depending on whether the scroll is up or down:
JS:
var $gears = $('.gear'),
$i = 0,
$scrollBefore = 0;
$(window).scroll(function () {
if($(this).scrollTop() > $scrollBefore){
$scrollBefore = $(this).scrollTop();
$gears.css("transform", "rotate(" + ($i+=4) + "deg)");
}else if($(this).scrollTop() < $scrollBefore){
$scrollBefore = $(this).scrollTop();
$gears.css("transform", "rotate(" + ($i-=4) + "deg)");
}
});
this JS Fiddle 2, makes them rotate in opposite directions, and each gear direction switches depending if the scrolling is up or down:
JS:
var $gearLeft = $('.left_pulley'),
$gearRight = $('.right_pulley'),
$i = 0,
$j = 0,
$scrollBefore = 0;
$(window).scroll(function() {
if ($(this).scrollTop() > $scrollBefore) {
$scrollBefore = $(this).scrollTop();
$gearLeft.css("transform", "rotate(" + ($i += 4) + "deg)");
$gearRight.css("transform", "rotate(" + ($j -= 4) + "deg)");
} else if ($(this).scrollTop() < $scrollBefore) {
$scrollBefore = $(this).scrollTop();
$gearLeft.css("transform", "rotate(" + ($i -= 4) + "deg)");
$gearRight.css("transform", "rotate(" + ($j += 4) + "deg)");
}
});

Thanks for all the help everyone!
Just want to post my finial code in case anyone else needs help in the future.
/* Scott Louzon 11/24/15
This code is used to rotate two images of a gears when user scrolls */
/*This function see's when user scrolls then calls rotate_right & rotate_left
accordingly */
var scroll_at = 0; //variable to keep track of
//scroll postion
$(window).scroll(function() {
if ($(this).scrollTop() > 0) //if scroll postion is not at
{ //top do this
if ($(this).scrollTop() > scroll_at) //if scroll postion is > than b4
{
rotate_down();
}
else if ($(this).scrollTop() < scroll_at) //if scroll postion is < than b4
{
rotate_up();
}
scroll_at = $(this).scrollTop(); //set varible to were scroll
//postion is at now
}
})
//Both these functions call css to rotate the image of a gear
var rotation = 0;
function rotate_down()
{
rotation+= 8;
$(".left_pulley").css("transform","rotate("+ rotation +"deg)");
$(".right_pulley").css("transform","rotate("+ (-1 * rotation) +"deg)");
}
function rotate_up()
{
rotation += 8;
$(".left_pulley").css("transform","rotate("+ (-1 * rotation)+"deg)");
$(".right_pulley").css("transform","rotate("+ rotation +"deg)");
}
.left_pulley
{
position: absolute;
margin: 0;
padding: 0;
/*Used for gear rotation */
transition: transform 1ms;
transform-origin:50% 50%;
top: 263px;
left: 87%;
height: 35px;
width: 35px;
}
.left_pulley img
{
width: 100%;
}
.right_pulley
{
position: absolute;
margin: 0;
padding: 0;
/* Used for gear rotation */
transition: transform 1ms;
transform-origin:50% 50%;
top: 263px;
left: 94.2%;
height: 35px;
width: 35px;
}
.right_pulley img
{
width: 100%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="left_pulley">
<img src="gear2.png" />
</div>
<div class="right_pulley">
<img src="gear2.png" />
</div>

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