So what’s really hiding behind the names of linear, ease and other functions? Fairly complex mathematics of cubic Bézier curves.
In essence, named functions ease-in, ease-out and others are aliases for a universal curve description, for example:
cubic-bezier(0, 0, 1, 1) // this is linear
cubic-bezier(0.42, 0, 1, 1) // this is ease
In cubic-bezier(x1, y1, x2, y2), the values of x and y are the coordinates of curve points on the graph. Valid x values fall within the range of 0 to 1.
There is a great service that helps understand the functional representation of Bézier curves without having to study math books.
If you click this link, you will find an entire collection of various easing functions based on Bézier curves.
Bézier curves allow us to create any forms of animation. Let’s try!
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Hello, animation!</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/keyframes-storyboard">2. @keyframes: storyboard</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/keyframes-from-to">3. @keyframes: from and to</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/keyframes-frame-grouping">4. @keyframes: frame grouping</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/complex-animation-1">5. Complex animation, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/complex-animation-2">6. Complex animation, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/water-adventure">7. Water adventure</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-iteration-count">8. Animation play count: animation-iteration-count</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-direction-1">9. Animation direction: animation-direction, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-direction-2">10. Animation direction: animation-direction, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-delay-1">11. Animation delay: animation-delay, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-delay-2">12. Animation delay: animation-delay, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-delay-3">13. Animation delay: animation-delay, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/air-journey">14. Air journey</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-fill-mode-1">15. Pre- and post-animation state: animation-fill-mode, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-fill-mode-2">16. Pre- and post-animation state: animation-fill-mode, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-fill-mode-3">17. Pre- and post-animation state: animation-fill-mode, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-fill-mode-4">18. Pre- and post-animation state: animation-fill-mode, step 4</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-fill-mode-5">19. Pre- and post-animation state: animation-fill-mode, step 5</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/launching-factory-1">20. Launching a factory, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/launching-factory-2">21. Launching a factory, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-play-state">22. Stopping and starting an animation: animation-play-state</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-timing-function-1">23. Animation form, animation-timing-function</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-timing-function-2">24. Animation-timing-function, step 2</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/dynamic/animations/animation-timing-function-3">25. Animation-timing-function, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/animation-timing-function-4">26. Animation-timing-function, step 4</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/rocket-launch-pad-1">27. Rocket to the launch pad, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/rocket-launch-pad-2">28. Rocket to the launch pad, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/landing-1">29. Landing, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/landing-2">30. Landing, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/animations/landing-3">31. 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course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">Animation-timing-function, step 3</h1><div class="course-theory__content-text"><p>So what’s really hiding behind the names of <code>linear</code>, <code>ease</code> and other functions? Fairly complex mathematics of cubic <a target="_blank" href="https://en.wikipedia.org/wiki/B%C3%A9zier_curve" rel="nofollow">Bézier curves</a>.</p><p>In essence, named functions <code>ease-in</code>, <code>ease-out</code> and others are aliases for a universal curve description, for example:
<pre><code>cubic-bezier(0, 0, 1, 1) // this is linear
cubic-bezier(0.42, 0, 1, 1) // this is ease</code></pre><p>In <code>cubic-bezier(x1, y1, x2, y2)</code>, the values of <code>x</code> and <code>y</code> are the coordinates of curve points on the graph. Valid <code>x</code> values fall within the range of <code>0</code> to <code>1</code>.</p><p>There is a <a target="_blank" href="http://cubic-bezier.com/" rel="nofollow">great service</a> that helps understand the functional representation of Bézier curves without having to study math books.</p><p>If you click this <a target="_blank" href="http://easings.net/en" rel="nofollow">link</a>, you will find an entire collection of various easing functions based on Bézier curves.</p><p>Bézier curves allow us to create any forms of animation. Let’s try!</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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animation-name: move;
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@keyframes move {
to {
left: 400px;
}
}
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