private void GenerateRivers()
{
Find.WorldPathGrid.RecalculateAllPerceivedPathCosts();
List <int> coastalWaterTiles = this.GetCoastalWaterTiles();
if (!coastalWaterTiles.Any <int>())
{
return;
}
List <int> neighbors = new List <int>();
List <int>[] array = Find.WorldPathFinder.FloodPathsWithCostForTree(coastalWaterTiles, delegate(int st, int ed)
{
Tile tile = Find.WorldGrid[ed];
Tile tile2 = Find.WorldGrid[st];
Find.WorldGrid.GetTileNeighbors(ed, neighbors);
int num = neighbors[0];
for (int j = 0; j < neighbors.Count; j++)
{
if (WorldGenStep_Rivers.GetImpliedElevation(Find.WorldGrid[neighbors[j]]) < WorldGenStep_Rivers.GetImpliedElevation(Find.WorldGrid[num]))
{
num = neighbors[j];
}
}
float num2 = 1f;
if (num != st)
{
num2 = 2f;
}
return(Mathf.RoundToInt(num2 * WorldGenStep_Rivers.ElevationChangeCost.Evaluate(WorldGenStep_Rivers.GetImpliedElevation(tile2) - WorldGenStep_Rivers.GetImpliedElevation(tile))));
}, (int tid) => Find.WorldGrid[tid].WaterCovered, null);
float[] flow = new float[array.Length];
for (int i = 0; i < coastalWaterTiles.Count; i++)
{
this.AccumulateFlow(flow, array, coastalWaterTiles[i]);
this.CreateRivers(flow, array, coastalWaterTiles[i]);
}
}
internal int <> m__0(int st, int ed)
{
Tile tile = Find.WorldGrid[ed];
Tile tile2 = Find.WorldGrid[st];
Find.WorldGrid.GetTileNeighbors(ed, this.neighbors);
int num = this.neighbors[0];
for (int i = 0; i < this.neighbors.Count; i++)
{
if (WorldGenStep_Rivers.GetImpliedElevation(Find.WorldGrid[this.neighbors[i]]) < WorldGenStep_Rivers.GetImpliedElevation(Find.WorldGrid[num]))
{
num = this.neighbors[i];
}
}
float num2 = 1f;
if (num != st)
{
num2 = 2f;
}
return(Mathf.RoundToInt(num2 * WorldGenStep_Rivers.ElevationChangeCost.Evaluate(WorldGenStep_Rivers.GetImpliedElevation(tile2) - WorldGenStep_Rivers.GetImpliedElevation(tile))));
}