private bool IsWaterLevelStableAt(XY waterLocation, WaterStream stream)
{
var waterInASameLevel = stream.EnumerateWaterInSameLavel(waterLocation).ToArray();
if (waterInASameLevel.Any(w => w.IsStable))
{
return(true);
}
var waterCanFlowFurther = waterInASameLevel.Any(w => HasEmptySpaceAround(w, stream));
if (waterCanFlowFurther)
{
return(false);
}
var waterInLowerLevel = waterInASameLevel
.SelectMany(w => w.FurtherFlows)
.Select(w => w.Location)
.Where(l => l.Y < waterLocation.Y)
.ToArray();
if (waterInLowerLevel.Length == 0)
{
return(true);
}
return(waterInLowerLevel.All(l => IsWaterLevelStableAt(l, stream)));
}
public WaterStream GetStream()
{
var stream = new WaterStream(sourceLocation);
var waterNodesToSpread = stream.Select(w => w.Location).ToHashSet();
do
{
var locationsToContinueSpreadingAt = new HashSet <XY>();
foreach (var waterLocation in waterNodesToSpread)
{
// Todo Refactor
var spreadedWater = stream.SpreadStreamAtLocation(waterLocation, clayMap);
var waterLocationInClayMap = spreadedWater.Select(w => w.Location).Where(l => !clayMap.IsBelowMap(l));
locationsToContinueSpreadingAt.AddRange(waterLocationInClayMap);
if (spreadedWater.Length == 0 && IsWaterLevelStableAt(waterLocation, stream))
{
var upperLevelWaterLocations = stream.GetUpperLevelSourceWater(waterLocation).Select(w => w.Location);
stream.StabilizeWaterInSameLevel(waterLocation);
locationsToContinueSpreadingAt.AddRange(upperLevelWaterLocations);
}
}
waterNodesToSpread = locationsToContinueSpreadingAt;
} while (waterNodesToSpread.Count > 0);
return(stream);
}
private bool IsLocationEmpty(XY location, WaterStream stream)
{
return(!clayMap.IsClayAtLocation(location) && !stream.HasWaterAtLocation(location));
}
private bool HasEmptySpaceAround(Water water, WaterStream stream)
{
return(Water.GetPossibleFlowDirections()
.Select(d => water.Location + d)
.Any(l => IsLocationEmpty(l, stream)));
}