FreeFlowGhostGenerator.cpp

#include "FreeFlowGhostGenerator.hpp"

boost::container::flat_map<size_t, ComputationalCell> FreeFlowGenerator::operator() (const Tessellation& tess,
        const vector<ComputationalCell>& cells, double /*time*/, TracerStickerNames const& /*tracerstickernames*/) const
{
        vector<std::pair<size_t, size_t> > outer_edges = GetOuterEdgesIndeces(tess);
        boost::container::flat_map<size_t, ComputationalCell> res;
        for (size_t i = 0; i < outer_edges.size(); ++i)
        {
                Edge const& edge = tess.GetEdge(static_cast<int>(outer_edges[i].first));
                size_t ghost_index = static_cast<size_t>(outer_edges[i].second == 1 ? edge.neighbors.first : edge.neighbors.second);
                if (tess.GetOriginalIndex(static_cast<int>(ghost_index)) < tess.GetPointNo())
                {
                        int real_cell = outer_edges[i].second == 1 ? edge.neighbors.second : edge.neighbors.first;
                        res[ghost_index] = cells[static_cast<size_t>(real_cell)];
                }
                else
                        res.insert(std::pair<size_t, ComputationalCell>(ghost_index, cells[ghost_index]));
        }
        return res;
}

Slope FreeFlowGenerator::GetGhostGradient(Tessellation const& tess,
        vector<ComputationalCell> const& cells, vector<Slope> const& /*gradients*/,
        size_t ghost_index, double /*time*/, Edge const& /*edge*/, TracerStickerNames const&
        /*tracerstickernames*/)const
{
        ComputationalCell cell(cells[static_cast<size_t>(tess.GetOriginalIndex(static_cast<int>(ghost_index)))]);
        cell.density = 0;
        cell.pressure = 0;
        cell.velocity = Vector2D(0, 0);
        cell.tracers = cells[0].tracers;
        size_t N = cell.tracers.size();
        for (size_t i = 0; i < N; ++i)
                cell.tracers[i] = 0;
        return Slope(cell, cell);
}