Other modders, forgers, do you always extend an block from existing block type (e.g. BlockStair,BlockSign)? Is there something else I should do, also?

 

Ok, I can easily tell that a Block yourmods_stair is a stair if the yourmod's Block is instanceof BlockStair and get any new IDs from the registry. I need to know what the block type is to rotate the meta. Is there any way to ensure I know the type of object is a "stair" assuming another modder correctly defined it. I prefer not to have more bodgey code than I have now.

 

I need to know from the tags and datavalues to rotate them before I place something.

There's no way to tell if a block is stairs or a sign apart from checking whether it extends

BlockStairs

or

BlockSign

. Anything else is just a block that may or may not share some properties of the block type you're checking for, you can't make any assumptions about it.

 

You shouldn't be manipulating metadata directly in 1.8+, set properties of the

IBlockState

and let the

Block

worry about metadata.

 

In 1.9+, use

IBlockProperties#withRotation

or

IBlockProperties#withMirror

to rotate/mirror a block.

Appreciated. I considered that in 1.8, but couldn't consistently get non-vanilla blocks in other mods to work as well as TileEntities. I will change the weird bit manipulation, that is hacked from 1.7 into 1.8 and 1.9 code. Mostly, I want to have the everything in a block or tileentity rotate relative to an ordinal direction.