private bool FlowHorizontal(World world, Vector3i position, LiquidLevel level, IFillable currentFillable)
{
Vector3i horizontalPosition = position;
var isHorStatic = false;
var levelHorizontal = LiquidLevel.Eight;
IFillable?horizontalFillable = null;
foreach (Orientation orientation in Orientations.ShuffledStart(position))
{
if (CheckNeighbor(
currentFillable.AllowOutflow(world, position, orientation.ToBlockSide()),
orientation.Offset(position),
orientation.Opposite().ToBlockSide()))
{
return(true);
}
}
if (horizontalPosition == position)
{
return(false);
}
SetLiquid(world, this, levelHorizontal + 1, isStatic: false, horizontalFillable, horizontalPosition);
if (isHorStatic)
{
ScheduleTick(world, horizontalPosition);
}
bool hasRemaining = level != LiquidLevel.One;
SetLiquid(
world,
hasRemaining ? this : None,
hasRemaining ? level - 1 : LiquidLevel.Eight,
!hasRemaining,
currentFillable,
position);
if (hasRemaining)
{
ScheduleTick(world, position);
}
return(true);
bool CheckNeighbor(bool outflowAllowed, Vector3i neighborPosition, BlockSide side)
{
(BlockInstance? blockNeighbor, LiquidInstance? liquidNeighbor) = world.GetContent(neighborPosition);
if (!outflowAllowed || blockNeighbor?.Block is not IFillable neighborFillable ||
!neighborFillable.AllowInflow(world, neighborPosition, side, this))
{
return(false);
}
bool isStatic = liquidNeighbor?.IsStatic ?? false;
if (liquidNeighbor?.Liquid == None)
{
isStatic = true;
Vector3i belowNeighborPosition = neighborPosition + FlowDirection;
(BlockInstance? belowNeighborBlock, LiquidInstance? belowNeighborLiquid) = world.GetContent(
belowNeighborPosition);
if (belowNeighborLiquid?.Liquid == None &&
belowNeighborBlock?.Block is IFillable belowFillable &&
belowFillable.AllowInflow(
world,
belowNeighborPosition,
Direction.EntrySide(),
this) &&
neighborFillable.AllowOutflow(
world,
neighborPosition,
Direction.ExitSide()))
{
SetLiquid(world, this, level, isStatic: false, belowFillable, belowNeighborPosition);
ScheduleTick(world, belowNeighborPosition);
SetLiquid(world, None, LiquidLevel.Eight, isStatic: true, currentFillable, position);
}
else
{
SetLiquid(world, this, LiquidLevel.One, isStatic: false, neighborFillable, neighborPosition);
if (isStatic)
{
ScheduleTick(world, neighborPosition);
}
bool remaining = level != LiquidLevel.One;
SetLiquid(
world,
remaining ? this : None,
remaining ? level - 1 : LiquidLevel.Eight,
!remaining,
currentFillable,
position);
if (remaining)
{
ScheduleTick(world, position);
}
}
return(true);
}
if (liquidNeighbor != null && liquidNeighbor.Liquid != this)
{
if (ContactManager.HandleContact(
world,
this.AsInstance(level),
position,
liquidNeighbor,
neighborPosition))
{
return(true);
}
}
else if (liquidNeighbor?.Liquid == this && level > liquidNeighbor.Level &&
liquidNeighbor.Level < levelHorizontal)
{
bool allowsFlow = liquidNeighbor.Level != level - 1 ||
level == LiquidLevel.Eight && !IsAtSurface(world, position) &&
IsAtSurface(world, neighborPosition) ||
HasNeighborWithLevel(world, level - 2, neighborPosition) ||
HasNeighborWithEmpty(world, neighborPosition);
if (!allowsFlow)
{
return(false);
}
levelHorizontal = liquidNeighbor.Level;
horizontalPosition = neighborPosition;
isHorStatic = isStatic;
horizontalFillable = neighborFillable;
}
return(false);
}