[1.8] Can you help me understand Y in chunks

[wmcritter]

I am trying my hand at generating my own terrain. I have had some success, but the Y coordinate is throwing me off.

I thought chunks were 16x16x16, and since the world is 256 high there are 16 chunks stacked on top of each other for each X and Z position. However, when the IChunkProvider is called, only X and Z values are passed, never a Y. And looking in ChunkProviderEnd I see that they are iterating through a for loop that I think is their Y values, but it is hard-coded to 127. So, are chunks actually 16x16x256? Or am I missing something entirely?

 

Thanks for any help you can offer.

[HenryRichard]

Chunks are 16x256x16 (xyz). They are saved to disk in 16x16x16 sections so that empty areas don't take up space, but they're generated 16x256x16 (still xyz).

[wmcritter]

Thanks for the quick reply.

As a quick test, I hard coded a 'for' loop as for(int y = 0; y < 256; y++) But it throws an index out of range error when I try to set that to the primer (primer.setBlockState(x, y, z, Blocks.stone.getDefaultState()).

I also tried 128. Happen to know why it would throw that error?

[wmcritter]

Nevermind about the index error. It was PEBCAK error.