private ExpansionWeightFunction GetExpansionWeightFunction(
GridPartition partition, IMapTemplate template
)
{
var middleCell = Grid.GetCellAtOffset(Grid.CellCountX / 2, Grid.CellCountZ / 2);
return(delegate(MapSection section, List <MapSection> chunk) {
if (IsWithinHardBorder(section.CentroidCell, template))
{
return 0;
}
int borderAvoidanceWeight = GetBorderAvoidanceWeight(section.CentroidCell, template);
int neighborsInContinent = partition.GetNeighbors(section).Intersect(chunk).Count();
int neighborsInContinentWeight = neighborsInContinent * template.NeighborsInContinentWeight;
int distanceFromSeedCentroid = Grid.GetDistance(chunk[0].CentroidCell, section.CentroidCell);
int distanceFromSeedCentroidWeight = distanceFromSeedCentroid * template.DistanceFromSeedCentroidWeight;
int distanceFromMapCenter = Grid.GetDistance(section.CentroidCell, middleCell) * template.DistanceFromMapCenterWeight;
int weight = 1 + Math.Max(
0, neighborsInContinentWeight + distanceFromSeedCentroidWeight + borderAvoidanceWeight + distanceFromMapCenter
);
return weight;
});
}