setBlockBoundsBasedOnState

@Override
public void setBlockBoundsBasedOnState(IBlockAccess worldIn, BlockPos pos)
{
    if (worldIn.getBlockState(pos).getValue(DOUBLE))
    {
        EnumFacing facing = worldIn.getBlockState(pos).getValue(FACING);

        switch (facing)
        {
            case NORTH:
                this.setBlockBounds(0.05F, 0F, 0F, 0.95F, 0.95F, 0.95F);
                break;
            case EAST:
                this.setBlockBounds(0.05F, 0F, 0.05F, 1F, 0.95F, 0.95F);
                break;
            case SOUTH:
                this.setBlockBounds(0.05F, 0F, 0.05F, 0.95F, 0.95F, 1F);
                break;
            case WEST:
                this.setBlockBounds(0F, 0F, 0.05F, 0.95F, 0.95F, 0.95F);
                break;
        }
    }

    this.setBlockBounds(0.05F, 0F, 0.05F, 0.95F, 0.95F, 0.95F);
}