private doubleME ShrinkInterval(doubleME interval)
{
// go from 5 --> 2 --> 1 --> .5 --> .2 --> .1 etc
switch (interval.Mantissa)
{
case 5:
return(new doubleME(interval.Exponent, 2));
case 2:
return(new doubleME(interval.Exponent, 1));
case 1:
return(new doubleME(interval.Exponent - 1, 5));
}
throw new Exception();
}
/// <summary>
/// Builds a set of <see cref="MagicGridSpacings"/> based upon the provided inputs.
/// </summary>
/// <returns>A set of <see cref="MagicGridSpacings"/>.</returns>
public MagicGridSpacings GetGridSpacings()
{
if (MinValue == MaxValue)
{
return(new MagicGridSpacings(MinValue - 1, 2 / MaxLines, MinValue + 1));
}
//find largest order of magnitude.
int largestOrderOfMag = Math.Max(OrderOfMagnitude(MinValue),
OrderOfMagnitude(MaxValue));
doubleME interval = new doubleME(largestOrderOfMag + 1, 1);
double upperLimit = 0, lowerLimit = 0;
int loopCount = 0;
while (true)
{
var nextInterval = ShrinkInterval(interval);
var nextUpperLimit = RoundUpTo(MaxValue, nextInterval.theDouble);
var nextLowerLimit = RoundDownTo(MinValue, nextInterval.theDouble);
var numNextIntervalsInRange = (nextUpperLimit - nextLowerLimit) / nextInterval.theDouble;
if (numNextIntervalsInRange > MaxLines)
{
//wrap it up.
if (loopCount == 0)
{
interval = new doubleME(interval.Exponent + 1, interval.Mantissa);
continue;
}
return(new MagicGridSpacings(lowerLimit, interval.theDouble, upperLimit));
}
//tighten it all up.
interval = nextInterval;
upperLimit = nextUpperLimit;
lowerLimit = nextLowerLimit;
if (++loopCount > 100)
{
throw new Exception();
}
}
}
/// <summary>
/// Builds a set of <see cref="MagicGridSpacings"/> based upon the provided inputs.
/// </summary>
/// <returns>A set of <see cref="MagicGridSpacings"/>.</returns>
public MagicGridSpacings GetGridSpacings()
{
if (MinValue == MaxValue)
{
return new MagicGridSpacings(MinValue - 1, 2 / MaxLines, MinValue + 1);
}
//find largest order of magnitude.
int largestOrderOfMag = Math.Max(OrderOfMagnitude(MinValue),
OrderOfMagnitude(MaxValue));
doubleME interval = new doubleME(largestOrderOfMag + 1, 1);
double upperLimit = 0, lowerLimit = 0;
int loopCount = 0;
while (true)
{
var nextInterval = ShrinkInterval(interval);
var nextUpperLimit = RoundUpTo(MaxValue, nextInterval.theDouble);
var nextLowerLimit = RoundDownTo(MinValue, nextInterval.theDouble);
var numNextIntervalsInRange = (nextUpperLimit - nextLowerLimit) / nextInterval.theDouble;
if (numNextIntervalsInRange > MaxLines)
{
//wrap it up.
if (loopCount == 0)
{
interval = new doubleME(interval.Exponent + 1, interval.Mantissa);
continue;
}
return new MagicGridSpacings(lowerLimit, interval.theDouble, upperLimit);
}
//tighten it all up.
interval = nextInterval;
upperLimit = nextUpperLimit;
lowerLimit = nextLowerLimit;
if (++loopCount > 100)
throw new Exception();
}
}
private doubleME ShrinkInterval(doubleME interval)
{
// go from 5 --> 2 --> 1 --> .5 --> .2 --> .1 etc
switch (interval.Mantissa)
{
case 5:
return new doubleME(interval.Exponent, 2);
case 2:
return new doubleME(interval.Exponent, 1);
case 1:
return new doubleME(interval.Exponent - 1, 5);
}
throw new Exception();
}
