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Unity 5.x Cookbook by Chico Queiroz, Matt Smith

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Displaying a countdown timer graphically with a UI Slider

There are many cases where we wish to inform the player of the proportion of time remaining, or at the completion of some value at a point in time, for example, a loading progress bar, the time or health remaining compared to the starting maximum, how much the player has filled up their water bottle from the fountain of youth, and so on. In this recipe, we'll illustrate how to remove the interactive 'handle' of a UI Slider, and change the size and color of its components to provide us with an easy-to-use, general purpose progress/proportion bar. In this recipe, we'll use our modified slider to graphically present to the user how much time remains for a countdown timer.

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