public void UpdateIsTop(int value, int x, int y, int z)
{
Terrain terrain = base.SubsystemTerrain.Terrain;
if (y < 255)
{
TerrainChunk chunkAtCell = terrain.GetChunkAtCell(x, z);
if (chunkAtCell != null)
{
int num = TerrainChunk.CalculateCellIndex(x & 0xF, y, z & 0xF);
int contents = Terrain.ExtractContents(chunkAtCell.GetCellValueFast(num + 1));
int data = Terrain.ExtractData(value);
bool isTop = !m_fluidBlock.IsTheSameFluid(contents);
chunkAtCell.SetCellValueFast(num, Terrain.ReplaceData(value, FluidBlock.SetIsTop(data, isTop)));
}
}
}
public void SpreadFluid()
{
for (int i = 0; i < 2; i++)
{
foreach (Point3 key in m_toUpdate.Keys)
{
int x = key.X;
int y = key.Y;
int z = key.Z;
int cellValue = base.SubsystemTerrain.Terrain.GetCellValue(x, y, z);
int contents = Terrain.ExtractContents(cellValue);
int data = Terrain.ExtractData(cellValue);
int level = FluidBlock.GetLevel(data);
if (m_fluidBlock.IsTheSameFluid(contents))
{
int cellValue2 = base.SubsystemTerrain.Terrain.GetCellValue(x, y - 1, z);
int contents2 = Terrain.ExtractContents(cellValue2);
int data2 = Terrain.ExtractData(cellValue2);
int level2 = FluidBlock.GetLevel(data2);
int num = m_fluidBlock.MaxLevel + 1;
int num2 = 0;
for (int j = 0; j < 4; j++)
{
int cellValue3 = base.SubsystemTerrain.Terrain.GetCellValue(x + m_sideNeighbors[j].X, y, z + m_sideNeighbors[j].Y);
int contents3 = Terrain.ExtractContents(cellValue3);
if (m_fluidBlock.IsTheSameFluid(contents3))
{
int level3 = FluidBlock.GetLevel(Terrain.ExtractData(cellValue3));
num = MathUtils.Min(num, level3);
if (level3 == 0)
{
num2++;
}
}
}
if (level != 0 && level <= num)
{
int contents4 = Terrain.ExtractContents(base.SubsystemTerrain.Terrain.GetCellValue(x, y + 1, z));
if (!m_fluidBlock.IsTheSameFluid(contents4))
{
if (num + 1 > m_fluidBlock.MaxLevel)
{
Set(x, y, z, 0);
}
else
{
Set(x, y, z, Terrain.MakeBlockValue(contents, 0, FluidBlock.SetLevel(data, num + 1)));
}
continue;
}
}
if (m_generateSources && level != 0 && num2 >= 2)
{
Set(x, y, z, Terrain.MakeBlockValue(contents, 0, FluidBlock.SetLevel(data, 0)));
}
else if (m_fluidBlock.IsTheSameFluid(contents2))
{
if (level2 > 1)
{
Set(x, y - 1, z, Terrain.MakeBlockValue(contents2, 0, FluidBlock.SetLevel(data2, 1)));
}
}
else if (!OnFluidInteract(cellValue2, x, y - 1, z, Terrain.MakeBlockValue(m_fluidBlock.BlockIndex, 0, FluidBlock.SetLevel(0, 1))) && level < m_fluidBlock.MaxLevel)
{
m_visited.Clear();
int num3 = LevelAtNearestFall(x + 1, y, z, level + 1, m_visited);
int num4 = LevelAtNearestFall(x - 1, y, z, level + 1, m_visited);
int num5 = LevelAtNearestFall(x, y, z + 1, level + 1, m_visited);
int num6 = LevelAtNearestFall(x, y, z - 1, level + 1, m_visited);
int num7 = MathUtils.Min(num3, num4, num5, num6);
if (num3 == num7)
{
FlowTo(x + 1, y, z, level + 1);
FlowTo(x, y, z - 1, m_fluidBlock.MaxLevel);
FlowTo(x, y, z + 1, m_fluidBlock.MaxLevel);
}
if (num4 == num7)
{
FlowTo(x - 1, y, z, level + 1);
FlowTo(x, y, z - 1, m_fluidBlock.MaxLevel);
FlowTo(x, y, z + 1, m_fluidBlock.MaxLevel);
}
if (num5 == num7)
{
FlowTo(x, y, z + 1, level + 1);
FlowTo(x - 1, y, z, m_fluidBlock.MaxLevel);
FlowTo(x + 1, y, z, m_fluidBlock.MaxLevel);
}
if (num6 == num7)
{
FlowTo(x, y, z - 1, level + 1);
FlowTo(x - 1, y, z, m_fluidBlock.MaxLevel);
FlowTo(x + 1, y, z, m_fluidBlock.MaxLevel);
}
}
}
}
m_toUpdate.Clear();
foreach (KeyValuePair <Point3, int> item in m_toSet)
{
int x2 = item.Key.X;
int y2 = item.Key.Y;
int z2 = item.Key.Z;
int value = item.Value;
int contents5 = Terrain.ExtractContents(item.Value);
int cellContents = base.SubsystemTerrain.Terrain.GetCellContents(x2, y2, z2);
FluidBlock fluidBlock = BlocksManager.FluidBlocks[cellContents];
if (fluidBlock != null && !fluidBlock.IsTheSameFluid(contents5))
{
base.SubsystemTerrain.DestroyCell(0, x2, y2, z2, value, noDrop: false, noParticleSystem: false);
}
else
{
base.SubsystemTerrain.ChangeCell(x2, y2, z2, value);
}
}
m_toSet.Clear();
base.SubsystemTerrain.ProcessModifiedCells();
}
}