/// <summary>
/// attempts to extend the piston. returns false if impossible.
/// </summary>
private bool TryExtend(World par1World, int par2, int par3, int par4, int par5)
{
int i = par2 + Facing.OffsetsXForSide[par5];
int j = par3 + Facing.OffsetsYForSide[par5];
int k = par4 + Facing.OffsetsZForSide[par5];
int l = 0;
do
{
if (l >= 13)
{
break;
}
if (j <= 0 || j >= 255)
{
return(false);
}
int j1 = par1World.GetBlockId(i, j, k);
if (j1 == 0)
{
break;
}
if (!CanPushBlock(j1, par1World, i, j, k, true))
{
return(false);
}
if (Block.BlocksList[j1].GetMobilityFlag() == 1)
{
Block.BlocksList[j1].DropBlockAsItem(par1World, i, j, k, par1World.GetBlockMetadata(i, j, k), 0);
par1World.SetBlockWithNotify(i, j, k, 0);
break;
}
if (l == 12)
{
return(false);
}
i += Facing.OffsetsXForSide[par5];
j += Facing.OffsetsYForSide[par5];
k += Facing.OffsetsZForSide[par5];
l++;
}while (true);
int l1;
for (; i != par2 || j != par3 || k != par4; k = l1)
{
int i1 = i - Facing.OffsetsXForSide[par5];
int k1 = j - Facing.OffsetsYForSide[par5];
l1 = k - Facing.OffsetsZForSide[par5];
int i2 = par1World.GetBlockId(i1, k1, l1);
int j2 = par1World.GetBlockMetadata(i1, k1, l1);
if (i2 == BlockID && i1 == par2 && k1 == par3 && l1 == par4)
{
par1World.SetBlockAndMetadata(i, j, k, Block.PistonMoving.BlockID, par5 | (IsSticky ? 8 : 0));
par1World.SetBlockTileEntity(i, j, k, BlockPistonMoving.GetTileEntity(Block.PistonExtension.BlockID, par5 | (IsSticky ? 8 : 0), par5, true, false));
}
else
{
par1World.SetBlockAndMetadata(i, j, k, Block.PistonMoving.BlockID, j2);
par1World.SetBlockTileEntity(i, j, k, BlockPistonMoving.GetTileEntity(i2, j2, par5, true, false));
}
i = i1;
j = k1;
}
return(true);
}
public override void PowerBlock(World par1World, int par2, int par3, int par4, int par5, int par6)
{
IgnoreUpdates = true;
int i = par6;
if (par5 == 0)
{
if (TryExtend(par1World, par2, par3, par4, i))
{
par1World.SetBlockMetadataWithNotify(par2, par3, par4, i | 8);
par1World.PlaySoundEffect((double)par2 + 0.5D, (double)par3 + 0.5D, (double)par4 + 0.5D, "tile.piston.out", 0.5F, par1World.Rand.NextFloat() * 0.25F + 0.6F);
}
else
{
par1World.SetBlockMetadata(par2, par3, par4, i);
}
}
else if (par5 == 1)
{
TileEntity tileentity = par1World.GetBlockTileEntity(par2 + Facing.OffsetsXForSide[i], par3 + Facing.OffsetsYForSide[i], par4 + Facing.OffsetsZForSide[i]);
if (tileentity != null && (tileentity is TileEntityPiston))
{
((TileEntityPiston)tileentity).ClearPistonTileEntity();
}
par1World.SetBlockAndMetadata(par2, par3, par4, Block.PistonMoving.BlockID, i);
par1World.SetBlockTileEntity(par2, par3, par4, BlockPistonMoving.GetTileEntity(BlockID, i, i, false, true));
if (IsSticky)
{
int j = par2 + Facing.OffsetsXForSide[i] * 2;
int k = par3 + Facing.OffsetsYForSide[i] * 2;
int l = par4 + Facing.OffsetsZForSide[i] * 2;
int i1 = par1World.GetBlockId(j, k, l);
int j1 = par1World.GetBlockMetadata(j, k, l);
bool flag = false;
if (i1 == Block.PistonMoving.BlockID)
{
TileEntity tileentity1 = par1World.GetBlockTileEntity(j, k, l);
if (tileentity1 != null && (tileentity1 is TileEntityPiston))
{
TileEntityPiston tileentitypiston = (TileEntityPiston)tileentity1;
if (tileentitypiston.GetPistonOrientation() == i && tileentitypiston.IsExtending())
{
tileentitypiston.ClearPistonTileEntity();
i1 = tileentitypiston.GetStoredBlockID();
j1 = tileentitypiston.GetBlockMetadata();
flag = true;
}
}
}
if (!flag && i1 > 0 && CanPushBlock(i1, par1World, j, k, l, false) && (Block.BlocksList[i1].GetMobilityFlag() == 0 || i1 == Block.PistonBase.BlockID || i1 == Block.PistonStickyBase.BlockID))
{
par2 += Facing.OffsetsXForSide[i];
par3 += Facing.OffsetsYForSide[i];
par4 += Facing.OffsetsZForSide[i];
par1World.SetBlockAndMetadata(par2, par3, par4, Block.PistonMoving.BlockID, j1);
par1World.SetBlockTileEntity(par2, par3, par4, BlockPistonMoving.GetTileEntity(i1, j1, i, false, false));
IgnoreUpdates = false;
par1World.SetBlockWithNotify(j, k, l, 0);
IgnoreUpdates = true;
}
else if (!flag)
{
IgnoreUpdates = false;
par1World.SetBlockWithNotify(par2 + Facing.OffsetsXForSide[i], par3 + Facing.OffsetsYForSide[i], par4 + Facing.OffsetsZForSide[i], 0);
IgnoreUpdates = true;
}
}
else
{
IgnoreUpdates = false;
par1World.SetBlockWithNotify(par2 + Facing.OffsetsXForSide[i], par3 + Facing.OffsetsYForSide[i], par4 + Facing.OffsetsZForSide[i], 0);
IgnoreUpdates = true;
}
par1World.PlaySoundEffect((double)par2 + 0.5D, (double)par3 + 0.5D, (double)par4 + 0.5D, "tile.piston.in", 0.5F, par1World.Rand.NextFloat() * 0.15F + 0.6F);
}
IgnoreUpdates = false;
}
