i figured it out
public static final PropertyDirection FACING = BlockHorizontal.FACING;
public int getMetaFromState(IBlockState state)
{
return ((EnumFacing)state.getValue(FACING)).getIndex();
}
public void onBlockPlacedBy(World worldIn, BlockPos pos, IBlockState state, EntityLivingBase placer, ItemStack stack)
{
worldIn.setBlockState(pos, state.withProperty(FACING, placer.getHorizontalFacing().getOpposite()), 2);
}
public IBlockState withMirror(IBlockState state, Mirror mirrorIn)
{
return state.withRotation(mirrorIn.toRotation((EnumFacing)state.getValue(FACING)));
}
protected BlockStateContainer createBlockState()
{
return new BlockStateContainer(this, new IProperty[] {FACING});
}
public IBlockState withRotation(IBlockState state, Rotation rot)
{
return state.withProperty(FACING, rot.rotate((EnumFacing)state.getValue(FACING)));
}
public void onBlockAdded(World worldIn, BlockPos pos, IBlockState state)
{
this.setDefaultFacing(worldIn, pos, state);
}
private void setDefaultFacing(World worldIn, BlockPos pos, IBlockState state)
{
if (!worldIn.isRemote)
{
IBlockState iblockstate = worldIn.getBlockState(pos.north());
IBlockState iblockstate1 = worldIn.getBlockState(pos.south());
IBlockState iblockstate2 = worldIn.getBlockState(pos.west());
IBlockState iblockstate3 = worldIn.getBlockState(pos.east());
EnumFacing enumfacing = (EnumFacing)state.getValue(FACING);
if (enumfacing == EnumFacing.NORTH && iblockstate.isFullBlock() && !iblockstate1.isFullBlock())
{
enumfacing = EnumFacing.SOUTH;
}
else if (enumfacing == EnumFacing.SOUTH && iblockstate1.isFullBlock() && !iblockstate.isFullBlock())
{
enumfacing = EnumFacing.NORTH;
}
else if (enumfacing == EnumFacing.WEST && iblockstate2.isFullBlock() && !iblockstate3.isFullBlock())
{
enumfacing = EnumFacing.EAST;
}
else if (enumfacing == EnumFacing.EAST && iblockstate3.isFullBlock() && !iblockstate2.isFullBlock())
{
enumfacing = EnumFacing.WEST;
}
worldIn.setBlockState(pos, state.withProperty(FACING, enumfacing), 2);
}
}