public static double NextDouble(ref ulong state)
{
// generate 52 random mantissa bits and an unbiased exponent of 0
ulong dval = (NextUInt64(ref state) & 0xFFFFFFFFFFFFFUL) | 0x3FF0000000000000UL;
double zeroToOne = DoubleULongUnion.ReinterpretCast(dval) - 1.0;
CoreException.Assert(zeroToOne >= 0.0f && zeroToOne < 1.0);
return(zeroToOne);
}
public static double NextDouble(ref ulong state, double minValue, double maxValue)
{
CoreException.Assert(maxValue > minValue);
var dval = (NextUInt64(ref state) & 0xFFFFFFFFFFFFFUL) | 0x3FF0000000000000UL;
double zeroToOne = DoubleULongUnion.ReinterpretCast(dval) - 1.0;
double retval = minValue + ((maxValue - minValue) * zeroToOne);
CoreException.Assert(retval >= minValue && retval < maxValue);
return(retval);
}
