bool MeshLayerMapper::layerMapping(MeshLib::Mesh &new_mesh, GeoLib::Raster const& raster, double noDataReplacementValue = 0.0) { if (new_mesh.getDimension() != 2) { ERR("MshLayerMapper::layerMapping() - requires 2D mesh"); return false; } GeoLib::RasterHeader const& header (raster.getHeader()); const double x0(header.origin[0]); const double y0(header.origin[1]); const double delta(header.cell_size); const std::pair<double, double> xDim(x0, x0 + header.n_cols * delta); // extension in x-dimension const std::pair<double, double> yDim(y0, y0 + header.n_rows * delta); // extension in y-dimension const std::size_t nNodes (new_mesh.getNumberOfNodes()); const std::vector<MeshLib::Node*> &nodes = new_mesh.getNodes(); for (unsigned i = 0; i < nNodes; ++i) { if (!raster.isPntOnRaster(*nodes[i])) { // use either default value or elevation from layer above nodes[i]->updateCoordinates((*nodes[i])[0], (*nodes[i])[1], noDataReplacementValue); continue; } double elevation (raster.interpolateValueAtPoint(*nodes[i])); if (std::abs(elevation - header.no_data) < std::numeric_limits<double>::epsilon()) elevation = noDataReplacementValue; nodes[i]->updateCoordinates((*nodes[i])[0], (*nodes[i])[1], elevation); } return true; }