private void IntervalFromRange(Range range, double minInterval, out DecomposedNumber interval, out DecomposedNumber firstTick)
{
// Exponent of the least significant figure of the interval.
int intervalExponent = (int)Math.Floor(Math.Log10(minInterval));
int intervalIntCoefficient = (int)Math.Floor(minInterval / Math.Pow(10, intervalExponent) + fractionalTolerance);
// LSF must be either 1, 2, 5 or 10, whichever is directly above the current value.
if (intervalIntCoefficient > 5)
{
intervalIntCoefficient = 1; intervalExponent++;
}
else if (intervalIntCoefficient > 2)
{
intervalIntCoefficient = 5;
}
else if (intervalIntCoefficient > 1)
{
intervalIntCoefficient = 2;
}
else
{
intervalIntCoefficient = 1;
}
//
interval = new DecomposedNumber(intervalIntCoefficient * Math.Pow(10, intervalExponent), (double)intervalIntCoefficient, intervalExponent);
//
// Now get the first tick
double firstTickValue;
double absoluteTolerance = fractionalTolerance * interval.Value;
if ((range.Min - absoluteTolerance) < 0)
{
firstTickValue = (range.Min - absoluteTolerance) - ((range.Min - absoluteTolerance) % interval.Value);
}
else
{
firstTickValue = interval.Value - ((range.Min - absoluteTolerance) % interval.Value) + (range.Min - absoluteTolerance);
}
int firstTickExp = (firstTickValue == 0) ? interval.Exponent : (int)Math.Floor(Math.Log10(Math.Abs(firstTickValue)));
firstTick = new DecomposedNumber(firstTickValue, firstTickValue / Math.Pow(10, firstTickExp), firstTickExp);
}
private void IntervalFromRange(Range range, double minInterval, out DecomposedNumber interval, out DecomposedNumber firstTick)
{
// Exponent of the least significant figure of the interval.
int intervalExponent = (int)Math.Floor(Math.Log10(minInterval));
int intervalIntCoefficient = (int)Math.Floor(minInterval / Math.Pow(10, intervalExponent) + fractionalTolerance);
// LSF must be either 1, 2, 5 or 10, whichever is directly above the current value.
if (intervalIntCoefficient > 5) { intervalIntCoefficient = 1; intervalExponent++; }
else if (intervalIntCoefficient > 2) { intervalIntCoefficient = 5; }
else if (intervalIntCoefficient > 1) { intervalIntCoefficient = 2; }
else { intervalIntCoefficient = 1; }
//
interval = new DecomposedNumber(intervalIntCoefficient * Math.Pow(10, intervalExponent), (double)intervalIntCoefficient, intervalExponent);
//
// Now get the first tick
double firstTickValue;
double absoluteTolerance = fractionalTolerance * interval.Value;
if ((range.Min - absoluteTolerance) < 0)
{
firstTickValue = (range.Min - absoluteTolerance) - ((range.Min - absoluteTolerance) % interval.Value);
}
else
{
firstTickValue = interval.Value - ((range.Min - absoluteTolerance) % interval.Value) + (range.Min - absoluteTolerance);
}
int firstTickExp = (firstTickValue == 0) ? interval.Exponent : (int)Math.Floor(Math.Log10(Math.Abs(firstTickValue)));
firstTick = new DecomposedNumber(firstTickValue, firstTickValue / Math.Pow(10, firstTickExp), firstTickExp);
}