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grid nibble array (#2632) 

Signed-off-by: liach <liach@users.noreply.github.com>

Co-authored-by: liach <liach@users.noreply.github.com>
This commit is contained in:
liach 2021-08-22 16:15:29 -05:00 committed by GitHub
parent 8653ed5962
commit bccb8ac86c
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2 changed files with 38 additions and 1 deletions
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28
mappings/net/minecraft/world/chunk/ChunkNibbleArray.mapping
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@ -1,15 +1,25 @@
CLASS net/minecraft/class_2804 net/minecraft/world/chunk/ChunkNibbleArray
COMMENT A chunk nibble array is an array of nibbles for each block position in
COMMENT a chunk. It is most often used to store light data.
COMMENT
COMMENT <p>A {@index nibble} is 4 bits, storing an integer from {@code 0} to
COMMENT {@code 15}. It takes half the space of a byte.
COMMENT
COMMENT <p>The nibbles are stored in an X-Z-Y major order; in the backing array,
COMMENT the indices increases by first increasing X, then Z, and finally Y.
FIELD field_12783 bytes [B
FIELD field_31403 BYTES_LENGTH I
FIELD field_31404 COPY_BLOCK_SIZE I
FIELD field_31405 NIBBLE_BITS I
METHOD <init> (I)V
ARG 1 size
METHOD <init> ([B)V
ARG 1 bytes
METHOD method_12137 asByteArray ()[B
METHOD method_12138 divideByTwo (I)I
METHOD method_12138 getArrayIndex (I)I
ARG 1 n
METHOD method_12139 get (III)I
COMMENT {@return the integer value of a nibble, in {@code [0, 15]}}
ARG 1 x
ARG 2 y
ARG 3 z
@ -22,10 +32,26 @@ CLASS net/minecraft/class_2804 net/minecraft/world/chunk/ChunkNibbleArray
METHOD method_12142 set (II)V
ARG 1 index
ARG 2 value
METHOD method_12143 occupiesSmallerBits (I)Z
COMMENT {@return if the nibble at {@code n} is stored in the less
COMMENT significant (smaller) 4 bits of the byte in the backing array}
ARG 1 n
COMMENT the index of the nibble, not the array index
METHOD method_12144 copy ()Lnet/minecraft/class_2804;
METHOD method_12145 set (IIII)V
COMMENT Sets the value of a nibble.
COMMENT
COMMENT <p>If the {@code value} has bits outside of the lowest 4 set to {@code 1},
COMMENT (value is outside of {@code [0, 15]), the extraneous bits are discarded.
ARG 1 x
ARG 2 y
ARG 3 z
ARG 4 value
METHOD method_12146 isUninitialized ()Z
METHOD method_35320 bottomToString (I)Ljava/lang/String;
COMMENT {@return a hexademical string representation of the {@code y=0} level of
COMMENT this array}
COMMENT
COMMENT <p>It is useful for debugging the grid nibble array.
ARG 1 unused
COMMENT unused

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mappings/net/minecraft/world/chunk/GridNibbleArray.mapping Normal file
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CLASS net/minecraft/class_4298 net/minecraft/world/chunk/GridNibbleArray
COMMENT A specialized chunk nibble array that ignores the Y parameters and only
COMMENT stores the nibbles for a 16 &times; 16 horizontal chunk slice.
COMMENT
COMMENT <p>When it is {@linkplain #toByteArray() converted to a byte array}, it
COMMENT fills each Y-level of the returned array with the same nibbles it stores.
FIELD field_31707 INDICES_PER_Y I
COMMENT The number of array indices each Y-level uses in a chunk nibble array.
METHOD <init> (Lnet/minecraft/class_2804;I)V
ARG 1 array
ARG 2 y