HTML5 Canvas Image Cross Fade Animation (GSAP)
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I am new to HTML5 Canvas and I am trying to achieve a cross fade effect between two images (using GSAP) in a HTML5 canvas. I am able to fadeIn and fadeOut individually , but if I try to blend the two effects together, it doesn't work.
If you run my snippet and move between the two divs quickly, you will notice the images are changing abruptly. (However, if you hover on 1 div and move out without hovering on the other div, it fades out just fine).
I wish to combine fadeIn and fadeOut to achieve a cross fade effect (just like this https://stackoverflow.com/a/33560604/3565182) BUT with GSAP Tweens.
Help would be appreciated.
let backgroundCanvas = $('#background-canvas')[0];
let canvasContext = backgroundCanvas.getContext('2d');
/* setting height and width */
backgroundCanvas.height = 100;
backgroundCanvas.width = 150;
/* setting up images */
let image1 = new Image();
let image2 = new Image();
image1.src = "http://lorempixel.com/500/300?22";
image2.src = "http://lorempixel.com/500/300?44";
/* confirm image load */
image1.onload = () => $('body').append('Image 1 loaded -- ');
image2.onload = () => $('body').append('Image2 loaded -- ');
let currentImage;
let imageId;
let backgroundImageProps =
opacity: 0
;
/* on hover */
$('.show-image').mouseenter(function()
imageId = $(this).attr('id');
if (imageId == '1')
currentImage = image1;
else
currentImage = image2;
/* from opacity 0 to 1 */
TweenLite.to(backgroundImageProps, 2,
opacity: 1,
ease: Power4.easeOut,
onUpdate: function()
drawImage(currentImage)
);
);
/* on hover end */
$('.show-image').mouseleave(function()
let imageToHide = currentImage;
/* from opacity 1 to 0 */
TweenLite.to(backgroundImageProps, 2,
opacity: 0,
ease: Power4.easeOut,
onUpdate: function()
drawImage(imageToHide)
);
);
/* canvas drawing logic */
function drawImage(imageToDealWith)
let image = imageToDealWith;
canvasContext.save();
canvasContext.clearRect(0, 0, backgroundCanvas.width, backgroundCanvas.height, 0, 0);
canvasContext.globalAlpha = backgroundImageProps.opacity;
canvasContext.drawImage(image, 0, 0, image.width, image.height, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
canvasContext.restore();
canvas
display:block;
div
display: inline-block;
border:1px solid black;
margin:10px;
padding:10px;
cursor:pointer;
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/2.0.2/TweenLite.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<canvas id="background-canvas"></canvas>
<div class="show-image" id="1">Image 1 (Hover)</div>
<div class="show-image" id="2">Image 2 (Hover)</div>javascript html5 canvas gasp
asked Nov 11 at 10:43
saibbyweb
3831317
add a comment |
up vote
0
down vote
favorite
I am new to HTML5 Canvas and I am trying to achieve a cross fade effect between two images (using GSAP) in a HTML5 canvas. I am able to fadeIn and fadeOut individually , but if I try to blend the two effects together, it doesn't work.
If you run my snippet and move between the two divs quickly, you will notice the images are changing abruptly. (However, if you hover on 1 div and move out without hovering on the other div, it fades out just fine).
I wish to combine fadeIn and fadeOut to achieve a cross fade effect (just like this https://stackoverflow.com/a/33560604/3565182) BUT with GSAP Tweens.
Help would be appreciated.
let backgroundCanvas = $('#background-canvas')[0];
let canvasContext = backgroundCanvas.getContext('2d');
/* setting height and width */
backgroundCanvas.height = 100;
backgroundCanvas.width = 150;
/* setting up images */
let image1 = new Image();
let image2 = new Image();
image1.src = "http://lorempixel.com/500/300?22";
image2.src = "http://lorempixel.com/500/300?44";
/* confirm image load */
image1.onload = () => $('body').append('Image 1 loaded -- ');
image2.onload = () => $('body').append('Image2 loaded -- ');
let currentImage;
let imageId;
let backgroundImageProps =
opacity: 0
;
/* on hover */
$('.show-image').mouseenter(function()
imageId = $(this).attr('id');
if (imageId == '1')
currentImage = image1;
else
currentImage = image2;
/* from opacity 0 to 1 */
TweenLite.to(backgroundImageProps, 2,
opacity: 1,
ease: Power4.easeOut,
onUpdate: function()
drawImage(currentImage)
);
);
/* on hover end */
$('.show-image').mouseleave(function()
let imageToHide = currentImage;
/* from opacity 1 to 0 */
TweenLite.to(backgroundImageProps, 2,
opacity: 0,
ease: Power4.easeOut,
onUpdate: function()
drawImage(imageToHide)
);
);
/* canvas drawing logic */
function drawImage(imageToDealWith)
let image = imageToDealWith;
canvasContext.save();
canvasContext.clearRect(0, 0, backgroundCanvas.width, backgroundCanvas.height, 0, 0);
canvasContext.globalAlpha = backgroundImageProps.opacity;
canvasContext.drawImage(image, 0, 0, image.width, image.height, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
canvasContext.restore();
canvas
display:block;
div
display: inline-block;
border:1px solid black;
margin:10px;
padding:10px;
cursor:pointer;
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/2.0.2/TweenLite.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<canvas id="background-canvas"></canvas>
<div class="show-image" id="1">Image 1 (Hover)</div>
<div class="show-image" id="2">Image 2 (Hover)</div>javascript html5 canvas gasp
asked Nov 11 at 10:43
saibbyweb
3831317
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I am new to HTML5 Canvas and I am trying to achieve a cross fade effect between two images (using GSAP) in a HTML5 canvas. I am able to fadeIn and fadeOut individually , but if I try to blend the two effects together, it doesn't work.
If you run my snippet and move between the two divs quickly, you will notice the images are changing abruptly. (However, if you hover on 1 div and move out without hovering on the other div, it fades out just fine).
I wish to combine fadeIn and fadeOut to achieve a cross fade effect (just like this https://stackoverflow.com/a/33560604/3565182) BUT with GSAP Tweens.
Help would be appreciated.
let backgroundCanvas = $('#background-canvas')[0];
let canvasContext = backgroundCanvas.getContext('2d');
/* setting height and width */
backgroundCanvas.height = 100;
backgroundCanvas.width = 150;
/* setting up images */
let image1 = new Image();
let image2 = new Image();
image1.src = "http://lorempixel.com/500/300?22";
image2.src = "http://lorempixel.com/500/300?44";
/* confirm image load */
image1.onload = () => $('body').append('Image 1 loaded -- ');
image2.onload = () => $('body').append('Image2 loaded -- ');
let currentImage;
let imageId;
let backgroundImageProps =
opacity: 0
;
/* on hover */
$('.show-image').mouseenter(function()
imageId = $(this).attr('id');
if (imageId == '1')
currentImage = image1;
else
currentImage = image2;
/* from opacity 0 to 1 */
TweenLite.to(backgroundImageProps, 2,
opacity: 1,
ease: Power4.easeOut,
onUpdate: function()
drawImage(currentImage)
);
);
/* on hover end */
$('.show-image').mouseleave(function()
let imageToHide = currentImage;
/* from opacity 1 to 0 */
TweenLite.to(backgroundImageProps, 2,
opacity: 0,
ease: Power4.easeOut,
onUpdate: function()
drawImage(imageToHide)
);
);
/* canvas drawing logic */
function drawImage(imageToDealWith)
let image = imageToDealWith;
canvasContext.save();
canvasContext.clearRect(0, 0, backgroundCanvas.width, backgroundCanvas.height, 0, 0);
canvasContext.globalAlpha = backgroundImageProps.opacity;
canvasContext.drawImage(image, 0, 0, image.width, image.height, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
canvasContext.restore();
canvas
display:block;
div
display: inline-block;
border:1px solid black;
margin:10px;
padding:10px;
cursor:pointer;
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/2.0.2/TweenLite.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<canvas id="background-canvas"></canvas>
<div class="show-image" id="1">Image 1 (Hover)</div>
<div class="show-image" id="2">Image 2 (Hover)</div>javascript html5 canvas gasp
asked Nov 11 at 10:43
saibbyweb
3831317
I am new to HTML5 Canvas and I am trying to achieve a cross fade effect between two images (using GSAP) in a HTML5 canvas. I am able to fadeIn and fadeOut individually , but if I try to blend the two effects together, it doesn't work.
If you run my snippet and move between the two divs quickly, you will notice the images are changing abruptly. (However, if you hover on 1 div and move out without hovering on the other div, it fades out just fine).
I wish to combine fadeIn and fadeOut to achieve a cross fade effect (just like this https://stackoverflow.com/a/33560604/3565182) BUT with GSAP Tweens.
Help would be appreciated.
let backgroundCanvas = $('#background-canvas')[0];
let canvasContext = backgroundCanvas.getContext('2d');
/* setting height and width */
backgroundCanvas.height = 100;
backgroundCanvas.width = 150;
/* setting up images */
let image1 = new Image();
let image2 = new Image();
image1.src = "http://lorempixel.com/500/300?22";
image2.src = "http://lorempixel.com/500/300?44";
/* confirm image load */
image1.onload = () => $('body').append('Image 1 loaded -- ');
image2.onload = () => $('body').append('Image2 loaded -- ');
let currentImage;
let imageId;
let backgroundImageProps =
opacity: 0
;
/* on hover */
$('.show-image').mouseenter(function()
imageId = $(this).attr('id');
if (imageId == '1')
currentImage = image1;
else
currentImage = image2;
/* from opacity 0 to 1 */
TweenLite.to(backgroundImageProps, 2,
opacity: 1,
ease: Power4.easeOut,
onUpdate: function()
drawImage(currentImage)
);
);
/* on hover end */
$('.show-image').mouseleave(function()
let imageToHide = currentImage;
/* from opacity 1 to 0 */
TweenLite.to(backgroundImageProps, 2,
opacity: 0,
ease: Power4.easeOut,
onUpdate: function()
drawImage(imageToHide)
);
);
/* canvas drawing logic */
function drawImage(imageToDealWith)
let image = imageToDealWith;
canvasContext.save();
canvasContext.clearRect(0, 0, backgroundCanvas.width, backgroundCanvas.height, 0, 0);
canvasContext.globalAlpha = backgroundImageProps.opacity;
canvasContext.drawImage(image, 0, 0, image.width, image.height, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
canvasContext.restore();
canvas
display:block;
div
display: inline-block;
border:1px solid black;
margin:10px;
padding:10px;
cursor:pointer;
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/2.0.2/TweenLite.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<canvas id="background-canvas"></canvas>
<div class="show-image" id="1">Image 1 (Hover)</div>
<div class="show-image" id="2">Image 2 (Hover)</div>let backgroundCanvas = $('#background-canvas')[0];
let canvasContext = backgroundCanvas.getContext('2d');
/* setting height and width */
backgroundCanvas.height = 100;
backgroundCanvas.width = 150;
/* setting up images */
let image1 = new Image();
let image2 = new Image();
image1.src = "http://lorempixel.com/500/300?22";
image2.src = "http://lorempixel.com/500/300?44";
/* confirm image load */
image1.onload = () => $('body').append('Image 1 loaded -- ');
image2.onload = () => $('body').append('Image2 loaded -- ');
let currentImage;
let imageId;
let backgroundImageProps =
opacity: 0
;
/* on hover */
$('.show-image').mouseenter(function()
imageId = $(this).attr('id');
if (imageId == '1')
currentImage = image1;
else
currentImage = image2;
/* from opacity 0 to 1 */
TweenLite.to(backgroundImageProps, 2,
opacity: 1,
ease: Power4.easeOut,
onUpdate: function()
drawImage(currentImage)
);
);
/* on hover end */
$('.show-image').mouseleave(function()
let imageToHide = currentImage;
/* from opacity 1 to 0 */
TweenLite.to(backgroundImageProps, 2,
opacity: 0,
ease: Power4.easeOut,
onUpdate: function()
drawImage(imageToHide)
);
);
/* canvas drawing logic */
function drawImage(imageToDealWith)
let image = imageToDealWith;
canvasContext.save();
canvasContext.clearRect(0, 0, backgroundCanvas.width, backgroundCanvas.height, 0, 0);
canvasContext.globalAlpha = backgroundImageProps.opacity;
canvasContext.drawImage(image, 0, 0, image.width, image.height, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
canvasContext.restore();
canvas
display:block;
div
display: inline-block;
border:1px solid black;
margin:10px;
padding:10px;
cursor:pointer;
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/2.0.2/TweenLite.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<canvas id="background-canvas"></canvas>
<div class="show-image" id="1">Image 1 (Hover)</div>
<div class="show-image" id="2">Image 2 (Hover)</div>let backgroundCanvas = $('#background-canvas')[0];
let canvasContext = backgroundCanvas.getContext('2d');
/* setting height and width */
backgroundCanvas.height = 100;
backgroundCanvas.width = 150;
/* setting up images */
let image1 = new Image();
let image2 = new Image();
image1.src = "http://lorempixel.com/500/300?22";
image2.src = "http://lorempixel.com/500/300?44";
/* confirm image load */
image1.onload = () => $('body').append('Image 1 loaded -- ');
image2.onload = () => $('body').append('Image2 loaded -- ');
let currentImage;
let imageId;
let backgroundImageProps =
opacity: 0
;
/* on hover */
$('.show-image').mouseenter(function()
imageId = $(this).attr('id');
if (imageId == '1')
currentImage = image1;
else
currentImage = image2;
/* from opacity 0 to 1 */
TweenLite.to(backgroundImageProps, 2,
opacity: 1,
ease: Power4.easeOut,
onUpdate: function()
drawImage(currentImage)
);
);
/* on hover end */
$('.show-image').mouseleave(function()
let imageToHide = currentImage;
/* from opacity 1 to 0 */
TweenLite.to(backgroundImageProps, 2,
opacity: 0,
ease: Power4.easeOut,
onUpdate: function()
drawImage(imageToHide)
);
);
/* canvas drawing logic */
function drawImage(imageToDealWith)
let image = imageToDealWith;
canvasContext.save();
canvasContext.clearRect(0, 0, backgroundCanvas.width, backgroundCanvas.height, 0, 0);
canvasContext.globalAlpha = backgroundImageProps.opacity;
canvasContext.drawImage(image, 0, 0, image.width, image.height, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
canvasContext.restore();
canvas
display:block;
div
display: inline-block;
border:1px solid black;
margin:10px;
padding:10px;
cursor:pointer;
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/2.0.2/TweenLite.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<canvas id="background-canvas"></canvas>
<div class="show-image" id="1">Image 1 (Hover)</div>
<div class="show-image" id="2">Image 2 (Hover)</div>javascript html5 canvas gasp
javascript html5 canvas gasp
asked Nov 11 at 10:43
saibbyweb
3831317
asked Nov 11 at 10:43
saibbyweb
3831317
asked Nov 11 at 10:43
saibbyweb
3831317
asked Nov 11 at 10:43
saibbyweb
3831317
asked Nov 11 at 10:43
saibbyweb
3831317
3831317
add a comment |
add a comment |
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