public static TileEntity getTileEntity(IBlockAccess blockaccess, int x, int y, int z) {
HashSet<ChunkCoordinates> visited = Sets.newHashSet();
Block block = blockaccess.getBlock(x, y, z);
while (block != NailedBlocks.portalController) {
if (isValidLinkPortalBlock(block) == 0) {
return null;
}
ChunkCoordinates pos = new ChunkCoordinates(x, y, z);
if (!visited.add(pos)) {
return null;
}
int meta = blockaccess.getBlockMetadata(x, y, z);
if (meta == 0) {
return null;
}
if (meta == 1) {
y--;
} else if (meta == 2) {
y++;
} else if (meta == 3) {
z--;
} else if (meta == 4) {
z++;
} else if (meta == 5) {
x--;
} else if (meta == 6) {
x++;
} else {
return null;
}
block = blockaccess.getBlock(x, y, z);
}
return blockaccess.getTileEntity(x, y, z);
}
