Tool to reduce the number of nodes in a way by filtering out the "least important" ones, using the Douglas-Peucker algorithm.
public static function simplify(way:Way, map:Map, keepOffscreen:Boolean):void Carries out simplification on a way, adding an entry to global undo stack.
Parameters
| way:Way — Way to be simplified.
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| map:Map — Map it belongs to, for computing offscreen-ness.
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| keepOffscreen:Boolean — If true, don't delete any nodes that are not currently visible.
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