private static void VectorApply(float[] ret, float[] categoriesByOrigin, float[] friction, float[] dStar, float[] columnTotals, int categories)
{
var numberOfZones = columnTotals.Length;
Parallel.For(0, columnTotals.Length, new ParallelOptions()
{
MaxDegreeOfParallelism = Environment.ProcessorCount
},
() => new float[columnTotals.Length],
(int i, ParallelLoopState state, float[] localTotals) =>
{
for (int k = 0; k < categories; k++)
{
var catByOrigin = categoriesByOrigin[i + k * numberOfZones];
if (catByOrigin <= 0)
{
continue;
}
int index = (k * numberOfZones * numberOfZones) + (i * numberOfZones);
var sumAF = VectorHelper.MultiplyAndSum(friction, index, dStar, 0, numberOfZones);
if (sumAF <= 0)
{
continue;
}
VectorHelper.Multiply2Scalar1AndColumnSum(ret, index, friction, index, dStar, 0, catByOrigin / sumAF, localTotals, 0, numberOfZones);
}
return(localTotals);
},
(float[] localTotals) =>
{
lock (columnTotals)
{
VectorHelper.Add(columnTotals, 0, columnTotals, 0, localTotals, 0, columnTotals.Length);
}
});
}
private void VectorProcessFlow(float[] columnTotals, float[][] flatFlows)
{
Parallel.For(0, Productions.GetFlatData().Length, new ParallelOptions()
{
MaxDegreeOfParallelism = Environment.ProcessorCount
},
() => new float[columnTotals.Length],
(int flatOrigin, ParallelLoopState state, float[] localTotals) =>
{
var flatProductions = Productions.GetFlatData();
// check to see if there is no production, if not skip this
if (flatProductions[flatOrigin] > 0)
{
var flatFriction = Friction.GetFlatData();
var flatAStar = AttractionsStar.GetFlatData();
var flatAttractions = Attractions.GetFlatData();
var flatFrictionRow = flatFriction[flatOrigin];
var sumAF = VectorHelper.Multiply3AndSum(flatFrictionRow, 0, flatAttractions, 0, flatAStar, 0, flatFriction.Length);
sumAF = (flatProductions[flatOrigin] / sumAF);
if (float.IsInfinity(sumAF) | float.IsNaN(sumAF))
{
// this needs to be 0f, otherwise we will be making the attractions have to be balanced higher
sumAF = 0f;
}
VectorHelper.Multiply3Scalar1AndColumnSum(flatFlows[flatOrigin], 0, flatFrictionRow, 0, flatAttractions, 0, flatAStar, 0, sumAF, localTotals, 0, flatFriction.Length);
}
return(localTotals);
},
(float[] localTotals) =>
{
lock (columnTotals)
{
VectorHelper.Add(columnTotals, 0, columnTotals, 0, localTotals, 0, columnTotals.Length);
}
});
}
