How does tweening work?
This course shows how to use the motion curve and easing options in Adobe Animate to prototype your own UI animation. Instructor Joseph Labrecque shows how to create a new project, dial in the document settings, and employ different methods of animation, including keyframing and tweening. A motion tween is a feature available in Adobe Flash (formerly Macromedia Flash) that allows you to easily animate the motion of an object. Instead of defining the location of the object in every frame, you can create a motion tween, which will automatically move the object from the beginning location to ending location. In Adobe Animate, tween is short for in-between. Take this circle animation for instance. In traditional animation, the animator draws a starting position and an ending position a few frames later.An In-between authors will then come in and draw all the frames between the two key positions. In this case, everything between frame one and twenty four.
Tweening is a computer-assisted animation technique. It consists in moving or morphing a digital element between 2 keyframes. This by using an animation software.
In 2D animation, the animator will specify 2 key states. So, he will be able to change the scale, location, color, etc. values of an object. Then let the computer calculate the transition between the 2 keyframes.
The most basic example of this, is a circle that moves horizontally from left to the right :
Of course, tweening animation isn’t only used for moving objects.
So we can modify all the values of the object between 2 different states (keyframes). The goal is to play with its color, size, form or even transparency to create auto-generated transitions (or morphing). All of this between 2 poses, in an automatized way, without having to redraw each inbetweens :
Because it is computer-assisted animated, tweening is also used in 3D. It is used to make the transition between 2 numeric values configured by keyframes.
The result remains the same, and the possibilities are higher in 3D, but also way more complex :
Tweening animation begginings
Computer-calculated animation began in the 1940s. When pioneers began to experiment computer-generated virtual images.
One of the fathers of the genre, John Whitney, created the opening credits of Alfred Hitchcock’s “Vertigo” (1958) in collaboration with the graphic designer Saul Bass :
In the early 1960s, Bell Labs, a research center interested in computer experimentation and its various future applications, began to create fully computer-generated visual content.
Edward Zajac, a researcher at Bell Labs and considered one of the first digital artists ever, produced one of the first fully computer-generated films.
Motion Tweening In Adobe Animate Cc
This film is named “A Two Gyro Gravity Gradient” (1963). It was created to demonstrate how a satellite can remain aligned face to Earth during the course of its orbit around it :
Flash animation software (Animate CC) and tweening movement
Adobe Flash (originally Macromedia Flash for regular users) is an animation software. Using vector, bitmap or script generated images (with ActionScript) it is used to create multimedia content. Content destined to be published on the Web.
It can be used to create animations for video games or mobile apps. But its use was mainly devious by animation studios for 2D TV series or animation film productions.
It is nowadays a standard and one of the most used softwares in the animation industry.
It also allows, with the use of its drawing tools, to produce traditional animations.
Cheap and easy to use, it also permit cut-out characters animation.
It is used to optimize the speed of production, while reducing costs while keeping a good visual quality. That’s why studios love it.
That said, for the “purists” of traditional animation, Flash was one of the reaons why traditional animation vanished. Precisely because of all its advantages and by wanting to save too much on the production, as a result, jerky animation pollutes the market.
Jerky animation, sloppy and degraded visual quality, old 2D animators of the golden age of traditional animation can have difficulties adapting to this kind of computer-assisted animation…
Fortunately, there are other alternatives on the market, such as Toonboom’s Harmony software.
This software has the particularity, in addition to having all the same features as Flash for cut-out animation, to give back its nobility to traditional animation.
It allows, thanks to its advanced drawing tools and its light table, to recreate a more traditional approach and feeling to 2D animation by computer and this is most appreciated by those who are nostalgic of good old pencil on paper animation! Clash league of legends 2020.
Tweening animation in 3D
In 3D animation, we use the same principle as computer-assisted 2D animation, so we generate interpolations between 2 key poses (or keyframes in 3D).
Each time a new keyframe is created, a set of numeric values is saved and it determines the state of a 3D object in a virtual space at a given time.
For example, we can animate a sphere that moves from point A to point B horizontally, by changing the translation values of the object on the z axis.
The same goes for animating the 3D object in rotation, scale or any numeric animable values. We also can animate the texture, the light, or the skeleton of a character’s rig by changing the weight value applied to the character, depending on the result we want. The possibilities are limitless!
As with any interpolation animation software, you will usually animate using a motion editor (Graph Editor in 3D).
In this motion editor, we can play with curves in order to apply “ease in / ease out” or animate any property of the object in a visual way rather than typing numerical values :
Of course, who says digital animation, says animating with numerical values.
Which is, for an artist, the opposite of the creative and traditional process that he expected when he spent all his time sketching in school instead of studying …
But we have to adapt to contemporary time, as animation softwares evolve and offer more interesting options, it can be fun to do computer animation espacially if we are able to apply the traditional animation techniques in the digital style!
Note: This excerpt does not include the lesson files. The lesson files are available with purchase of the book.
Adobe Animate Free
The project is an animation of a flame flickering at the top of a fictional company name. The shape of the flame constantly changes as well as the radial gradient fill inside of the flame. A linear gradient sweeps across the letters of the company name from left to right. In this lesson, you’ll animate both the flame and the colors that move across the letters.
In the previous two lessons, you learned to create animations with symbol instances. You could animate the motion, scale, rotation, color effect, or the filters applied to symbol instances. However, you couldn’t animate the actual contours of a graphic. For example, creating an animation of the undulating surface of the ocean, or the slithering motion of a snake’s body is difficult—if not impossible—with motion tweens. To do something more organic, you have to use shape tweening.
Shape tweening is a technique for interpolating the stroke and fill changes between different keyframes. Shape tweens make it possible to smoothly morph one shape into another. Any kind of animation that requires that the stroke or the fill of a shape to change—for example, animation of clouds, water, or fire—is a perfect candidate for shape tweening.
Shape Tweening Adobe Animate
Because shape tweening applies only to shapes, you can’t use groups, symbol instances, or bitmap images.