24 lines
559 B
Markdown
24 lines
559 B
Markdown
# Voxels Chunk (version 2)
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IDs and states are separated for extRLE16 compression efficiency.
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File format BNF (RFC 5234):
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```bnf
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chunk = (65536*uint16) block ids
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(65536*uint16) block states
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uint16 = 2byte 16 bit little-endian unsigned integer
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byte = %x00-FF 8 bit unsigned integer
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```
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65536 is number of voxels per chunk (16\*256\*16)
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## Block state
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Block state is encoded in 16 bits:
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- 0-2 bits (3) - block rotation index
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- 3-5 bits (3) - segment block bits
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- 6-7 bits (2) - reserved
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- 8-15 bits (8) - user bits
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