106 lines
2.6 KiB
Java
106 lines
2.6 KiB
Java
package org.dynmap;
|
|
|
|
/**
|
|
* Represents a static, thread-safe snapshot of chunk of blocks
|
|
* Purpose is to allow clean, efficient copy of a chunk data to be made, and then handed off for processing in another thread (e.g. map rendering)
|
|
*/
|
|
public class CraftChunkSnapshot {
|
|
private final int x, z;
|
|
private final byte[] buf; /* Flat buffer in uncompressed chunk file format */
|
|
|
|
private static final int BLOCKDATA_OFF = 32768;
|
|
private static final int BLOCKLIGHT_OFF = BLOCKDATA_OFF + 16384;
|
|
private static final int SKYLIGHT_OFF = BLOCKLIGHT_OFF + 16384;
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
CraftChunkSnapshot(int x, int z, byte[] buf) {
|
|
this.x = x;
|
|
this.z = z;
|
|
this.buf = buf;
|
|
}
|
|
|
|
/**
|
|
* Gets the X-coordinate of this chunk
|
|
*
|
|
* @return X-coordinate
|
|
*/
|
|
public int getX() {
|
|
return x;
|
|
}
|
|
|
|
/**
|
|
* Gets the Z-coordinate of this chunk
|
|
*
|
|
* @return Z-coordinate
|
|
*/
|
|
public int getZ() {
|
|
return z;
|
|
}
|
|
|
|
/**
|
|
* Get block type for block at corresponding coordinate in the chunk
|
|
*
|
|
* @param x 0-15
|
|
* @param y 0-127
|
|
* @param z 0-15
|
|
* @return 0-255
|
|
*/
|
|
public int getBlockTypeId(int x, int y, int z) {
|
|
return buf[x << 11 | z << 7 | y] & 255;
|
|
}
|
|
|
|
/**
|
|
* Get block data for block at corresponding coordinate in the chunk
|
|
*
|
|
* @param x 0-15
|
|
* @param y 0-127
|
|
* @param z 0-15
|
|
* @return 0-15
|
|
*/
|
|
public int getBlockData(int x, int y, int z) {
|
|
int off = ((x << 10) | (z << 6) | (y >> 1)) + BLOCKDATA_OFF;
|
|
|
|
return ((y & 1) == 0) ? (buf[off] & 0xF) : ((buf[off] >> 4) & 0xF);
|
|
}
|
|
|
|
/**
|
|
* Get sky light level for block at corresponding coordinate in the chunk
|
|
*
|
|
* @param x 0-15
|
|
* @param y 0-127
|
|
* @param z 0-15
|
|
* @return 0-15
|
|
*/
|
|
public int getBlockSkyLight(int x, int y, int z) {
|
|
int off = ((x << 10) | (z << 6) | (y >> 1)) + SKYLIGHT_OFF;
|
|
|
|
return ((y & 1) == 0) ? (buf[off] & 0xF) : ((buf[off] >> 4) & 0xF);
|
|
}
|
|
|
|
/**
|
|
* Get light level emitted by block at corresponding coordinate in the chunk
|
|
*
|
|
* @param x 0-15
|
|
* @param y 0-127
|
|
* @param z 0-15
|
|
* @return 0-15
|
|
*/
|
|
public int getBlockEmittedLight(int x, int y, int z) {
|
|
int off = ((x << 10) | (z << 6) | (y >> 1)) + BLOCKLIGHT_OFF;
|
|
|
|
return ((y & 1) == 0) ? (buf[off] & 0xF) : ((buf[off] >> 4) & 0xF);
|
|
}
|
|
|
|
public int getHighestBlockYAt(int x, int z) {
|
|
int off = x << 11 | z << 7 | 126;
|
|
int i;
|
|
for(i = 127; (i >= 2); i--, off--) {
|
|
if(buf[off] != 0) {
|
|
break;
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
}
|