gistfile1.txt

double[] inputs = { -10.0, -6.0, -5.0, -4.0, -3.0, -2.0, -1.0, 0.0, 0.001, 1.0, 2.0, 5.0, 6.0, 10.0, 12.0, 15.0, 25.0 };

foreach (var input in inputs)
{
    var output = WrapPositive(10L, input);
    Console.WriteLine($"{input} => {output}");
}

double WrapPositive(double periodicDistance, double position) =>
    (position % periodicDistance + periodicDistance) % periodicDistance;