/// <summary>
/// Creates a new instance.
/// </summary>
/// <param name="site">The prescription that just finished its repeat harvest</param>
public Args(AppliedPrescription prescription, ManagementArea mgmtArea, uint repeatNumber, bool lastHarvest)
{
Prescription = prescription;
MgmtArea = mgmtArea;
RepeatNumber = repeatNumber;
LastHarvest = lastHarvest;
}
/// <summary>
/// Signals that a prescription is finished with a repeat step
/// </summary>
public static void OnRepeatHarvestFinished(object sender,
AppliedPrescription prescription,
ManagementArea mgmtArea,
uint repeatNumber,
bool lastHarvest)
{
if (RepeatPrescriptionFinishedEvent != null)
{
RepeatPrescriptionFinishedEvent(sender, new RepeatHarvestPrescriptionFinishedEvent.Args(prescription, mgmtArea, repeatNumber, lastHarvest));
}
}
//---------------------------------------------------------------------
/// <summary>
/// Harvest the area's stands according to its prescriptions.
/// </summary>
public void HarvestStands()
{
//Model.Core.UI.WriteLine("BaseHarvest: ManagementArea.cs: HarvestStands: Harvesting management area {0} ...", mapCode);
//initialize each stand for harvesting (setting harvested = false)
foreach (Stand stand in stands)
{
stand.InitializeForHarvesting();
}
// Determine which are prescriptions are active.
List <AppliedPrescription> activePrescriptions = new List <AppliedPrescription>();
foreach (AppliedPrescription prescription in prescriptions)
{
// Decide whether or not to apply prescription
// tjs 2009.01.10 - prescription application
// This has been modified so that if the prescription is AppliedRepeatHarvest
// AND has not been harvested once, it is set to harvest. If it has been set
// to harvest the first time, it will automatically be harvested by the logic
// having to do with the setAside member variable (see AppliedRepeatHarvest.cs)
prescription.ApplyPrescription = false;
if (prescription.BeginTime <= Model.Core.CurrentTime &&
prescription.EndTime >= Model.Core.CurrentTime)
{
if (!(prescription is AppliedRepeatHarvest) || prescription.Prescription is SingleRepeatHarvest)
{
prescription.ApplyPrescription = true;
}
else if (prescription is AppliedRepeatHarvest &&
Model.Core.CurrentTime > 0 && ((AppliedRepeatHarvest)prescription).IsMultipleRepeatHarvest)
{
prescription.ApplyPrescription = true;
((AppliedRepeatHarvest)prescription).HasBeenHarvested = true;
}
} // if(prescription.BeginTime <= Model.Core.CurrentTime...
if (prescription.ApplyPrescription)
{
//Model.Core.UI.WriteLine(" Applying Prescription: {0} Model.Core.CurrentTime: {1}", prescription.Prescription.Name, Model.Core.CurrentTime);
if (isDebugEnabled)
{
log.DebugFormat(" Initializing prescription {0} ...", prescription.Prescription.Name);
}
//Model.Core.UI.WriteLine(" Initializing prescription {0} ...", prescription.Prescription.Name);
//set harvesting areas, rank stands (by user choice method)
prescription.InitializeForHarvest(stands);
if (prescription.AnyUnharvestedStandsRankedAbove0)
{
//Model.Core.UI.WriteLine(" Adding {0}", prescription.Prescription.Name);
foreach (StandRanking sr in prescription.Rankings)
{
//Model.Core.UI.WriteLine(" Stand {0} ranked {1}", sr.Stand.MapCode, sr.Rank);
}
activePrescriptions.Add(prescription);
}
}
}
if (isDebugEnabled)
{
Model.Core.UI.WriteLine(" Number of active prescriptions: {0}", activePrescriptions.Count);
for (int i = 0; i < activePrescriptions.Count; i++)
{
Model.Core.UI.WriteLine(" {0}) {1}", i + 1, activePrescriptions[i].Prescription.Name);
}
}
foreach (AppliedPrescription prescription in prescriptions)
{
//Model.Core.UI.WriteLine(" Looping through prescriptions... {0}.", prescription.Prescription.Name);
if (prescription is AppliedRepeatHarvest)
{
//prescription.Prescription.SiteSelectionMethod = new CompleteStand();
//Model.Core.UI.WriteLine(" Attempting to Re-Harvest {0}.", prescription.Prescription.Name);
((AppliedRepeatHarvest)prescription).ActiveMgmtArea = this;
((AppliedRepeatHarvest)prescription).HarvestReservedStands();
((AppliedRepeatHarvest)prescription).ActiveMgmtArea = null;
}
}
// Loop while there are still active prescriptions that haven't
// reached their target harvest areas and that still have
// at least one unharvested stand ranked above 0.
while (activePrescriptions.Count > 0)
{
double[] endProbability = new double[activePrescriptions.Count + 1];
// Assign a part of the probability interval [0, 1) to each
// prescription based on how the ratio of the area remaining to
// be harvested to the total area to be harvested
double ratioTotal = 0.0;
foreach (AppliedPrescription prescription in activePrescriptions)
{
ratioTotal += Math.Min(prescription.AreaRemainingRatio, prescription.StandsRemainingRatio);
}
if (ratioTotal > 0)
{
for (int i = 0; i < activePrescriptions.Count; ++i)
{
AppliedPrescription prescription = activePrescriptions[i];
//first prescription, start at 0
if (i == 0)
{
endProbability[i] = Math.Min(prescription.AreaRemainingRatio, prescription.StandsRemainingRatio) / ratioTotal;
}
//last prescription, end at 1.0
else if (i == activePrescriptions.Count - 1)
{
endProbability[i] = 1.0;
}
//
else
{
double startProbability = endProbability[i - 1];
double intervalWidth = Math.Min(prescription.AreaRemainingRatio, prescription.StandsRemainingRatio) / ratioTotal;
endProbability[i] = startProbability + intervalWidth;
}
} // for (int i = 0; i < activePrescriptions.Count; ++i)
// Randomly select one of the active prescriptions and harvest the stand ranked highest by that prescription.
AppliedPrescription selectedPrescription = null;
double randomNum = Model.Core.GenerateUniform();
for (int i = 0; i < activePrescriptions.Count; ++i)
{
if (randomNum < endProbability[i])
{
selectedPrescription = activePrescriptions[i];
//Model.Core.UI.WriteLine("\nSELECTED PRESCRIPTION = {0}\n", selectedPrescription.Prescription.Name);
break;
}
}
//actually harvest the stands: starting with highest ranked
if (selectedPrescription is AppliedRepeatHarvest)
{
((AppliedRepeatHarvest)selectedPrescription).HarvestHighestRankedStand();
}
else
{
selectedPrescription.HarvestHighestRankedStand();
}
//Model.Core.UI.WriteLine("\nSELECTED PRESCRIPTION = {0}\n", selectedPrescription.Prescription.Name);
Stand stand = selectedPrescription.HighestRankedStand;
if (stand != null)
{
//if there was a stand-adjacency constraint on this stand, enforce:
foreach (IRequirement r in selectedPrescription.Prescription.StandRankingMethod.Requirements)
{
//look for stand-adacency constraint in list r ranking methods
if (r.ToString() == "Landis.Harvest.StandAdjacency")
{
StandAdjacency sa = (StandAdjacency)r;
//set-aside every stand in this stand's neighbor-list for the specified number of years
//IF siteselection = some type of spreading, freeze the spread-list of neighbors
if (selectedPrescription.Prescription.SiteSelectionMethod.ToString() == "Landis.Harvest.CompleteStandSpreading" ||
selectedPrescription.Prescription.SiteSelectionMethod.ToString() == "Landis.Harvest.PartialStandSpreading")
{
//freeze every stand in the neighbor list
StandSpreading ss = (StandSpreading)selectedPrescription.Prescription.SiteSelectionMethod;
//if it's spreading, go through the UnharvestedNeighbors list that was built during the site-selection spread
foreach (Stand n_stand in ss.UnharvestedNeighbors)
{
//Model.Core.UI.WriteLine("SPREAD setting aside {0}", n_stand.MapCode);
n_stand.SetAsideUntil(Model.Core.CurrentTime + sa.SetAside);
}
}
else
{
//if it's not a spreading, just take all of the stand's neighbors
foreach (Stand n_stand in stand.Neighbors)
{
//Model.Core.UI.WriteLine("NON-SPREAD setting aside {0}", n_stand.MapCode);
n_stand.SetAsideUntil(Model.Core.CurrentTime + sa.SetAside);
}
}
//found and implemented the stand adjacency, so break out of the requirements list
break;
}
}
}
else
{
//Model.Core.UI.WriteLine("returned a null stand");
}
// Check each prescription to see if there's at least one unharvested stand that the prescription ranks higher than 0.
// The list is traversed in reverse order, so that the removal of items doesn't mess up the traversal.
for (int i = activePrescriptions.Count - 1; i >= 0; --i)
{
if (!activePrescriptions[i].AnyUnharvestedStandsRankedAbove0)
{
//Model.Core.UI.WriteLine("removing1 {0}", activePrescriptions[i].Prescription.Name);
activePrescriptions.RemoveAt(i);
}
}
}
else
{
for (int i = activePrescriptions.Count - 1; i >= 0; --i)
{
//Model.Core.UI.WriteLine("removing2 {0}", activePrescriptions[i].Prescription.Name);
activePrescriptions.RemoveAt(i);
}
}
} //endwhile
}
