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ActionScript Graphing Cookbook by Peter Backx, Dominic Gélineau

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Drawing meters and gauges

Meters and gauges are really good to convey some information really rapidly, and that is why they are used often in dashboards. They actually give more than just one piece of information; they also give an idea of the range the value can take and also if animated, it can give an idea of how much the value fluctuates.

Drawing meters and gauges

Getting ready

Having some notion about trigonometry and the unit circle (refer to http://en.wikipedia.org/wiki/Unit_circle) can be useful for this recipe. Also, some of the code will be based on Adobe evangelist Lee Brimelow's wedge class available at http://www.leebrimelow.com/?p=430, so it might be worth a ...

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