public IEnumerable <IChunkRulePair <QuadRule> > GetQuadRuleSet(ExecutionMask mask, int order)
{
if (mask == null)
{
mask = EdgeMask.GetFullMask(tracker.Ctx.GridDat);
}
if (mask is EdgeMask == false)
{
throw new Exception();
}
QuadRule baseRule = lineSimplex.GetQuadratureRule(order);
int D = tracker.Ctx.Grid.GridSimplex.SpatialDimension;
var result = new List <ChunkRulePair <QuadRule> >(mask.NoOfItemsLocally);
foreach (Chunk chunk in mask)
{
for (int i = 0; i < chunk.Len; i++)
{
List <double[]> nodes = new List <double[]>();
List <double> weights = new List <double>();
int[] noOfNodesPerEdge = new int[referenceLineSegments.Length];
int edge = i + chunk.i0;
// Always choose 'left' edge
int cell = tracker.Ctx.GridDat.Edges[edge, 0];
int localEdge = tracker.Ctx.GridDat.EdgeIndices[edge, 0];
LineSegment referenceSegment = referenceLineSegments[localEdge];
double[] roots = referenceSegment.GetRoots(tracker.LevelSets[levSetIndex], cell);
LineSegment[] subSegments = referenceSegment.Split(roots);
for (int k = 0; k < subSegments.Length; k++)
{
for (int m = 0; m < baseRule.NoOfNodes; m++)
{
// Base rule _always_ is a line rule, thus Nodes[*, _0_]
double[] point = subSegments[k].GetPointOnSegment(baseRule.Nodes[m, 0]);
uint lh = tracker.Ctx.NSC.LockNodeSetFamily(
tracker.Ctx.NSC.CreateContainer(
MultidimensionalArray.CreateWrapper(point, 1, D), -1.0));
MultidimensionalArray levelSetValue = tracker.GetLevSetValues(levSetIndex, 0, cell, 1);
tracker.Ctx.NSC.UnlockNodeSetFamily(lh);
// Only positive volume
if (levelSetValue[0, 0] <= 0.0)
{
continue;
}
weights.Add(baseRule.Weights[m] * subSegments[k].Length / referenceSegment.Length);
nodes.Add(point);
}
}
if (weights.Count == 0)
{
continue;
}
MultidimensionalArray localNodes = MultidimensionalArray.Create(nodes.Count, D);
for (int j = 0; j < nodes.Count; j++)
{
for (int d = 0; d < D; d++)
{
localNodes[j, d] = nodes[j][d];
}
}
MultidimensionalArray localEdgeNodes = MultidimensionalArray.Create(nodes.Count, 1);
tracker.Ctx.Grid.GridSimplex.VolumeToEdgeCoordinates(localEdge, localNodes, localEdgeNodes);
QuadRule subdividedRule = new QuadRule()
{
OrderOfPrecision = order,
Weights = MultidimensionalArray.Create(weights.Count),
Nodes = localEdgeNodes.CloneAs()
};
subdividedRule.Weights.SetV(weights, -1);
result.Add(new ChunkRulePair <QuadRule>(
Chunk.GetSingleElementChunk(edge), subdividedRule));
}
}
return(result);
}