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// properties: // -yields a proper probability (0<=x<=1) // -is never zero // -distance 0 has probability 1 // -function is monotonically decreasing // (greater distance = lower probability) // -negative distances are interpreted as positive static double genericDistanceToProbability(double distance) { ret 1/(1+abs(distance)); } static double genericDistanceToProbability(double a, double b) { ret genericDistanceToProbability(a-b); }