![]() ![]() How many frames-per-second are needed for this optical illusion to take place? Surprisingly few. Because this is too fast for our brains to perceive the individual images, we interpret them as a single fluid transition. In reality, the computer calculates graphical state along a transition timeline, rendering it to the viewer as separate static images at a rate of 60 images per second. We think of computer animation as being a fluid movement between point A and point B. This process is true from simple animations, like creating fade-ins by transitioning from a zero opacity state to a one hundred percent opacity state, to complex animations with thousands of nodes moved in three-dimensional space. ![]() Most of the time, when we see an animated design element on a webpage, the animation is created by a process whereby two or more keyframes are defined, and the computer generates the transition between those states. Inbetweening, or tweening, is the process of creating the in-between steps of an image that transform it from one state (keyframe) to another. ![]()
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