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добавлен BlockLocationSerializer

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DmitriyMX
2018-09-08 17:04:58 +03:00
parent ad31a90455
commit debb75a080
3 changed files with 99 additions and 0 deletions
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63
proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/serializers/BlockLocationSerializer.java Normal file
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package mc.core.network.proto_1_12_2.serializers;
import mc.core.world.block.BlockLocation;
import static com.google.common.math.IntMath.isPowerOfTwo;
public class BlockLocationSerializer {
private static final int[] MULTIPLY_DE_BRUIJN_BIT_POSITION = new int[] {0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8, 31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9};
private static final int NUM_X_BITS = 1 + log2(smallestEncompassingPowerOfTwo(30000000));
private static final int NUM_Z_BITS = NUM_X_BITS;
private static final int NUM_Y_BITS = 64 - NUM_X_BITS - NUM_Z_BITS;
private static final int Y_SHIFT = NUM_Z_BITS;
private static final int X_SHIFT = Y_SHIFT + NUM_Y_BITS;
private static final long X_MASK = (1L << NUM_X_BITS) - 1L;
private static final long Y_MASK = (1L << NUM_Y_BITS) - 1L;
private static final long Z_MASK = (1L << NUM_Z_BITS) - 1L;
/*
* net.minecraft.util.math.MathHelper#log2(int)
*/
private static int log2(int value) {
return log2DeBruijn(value) - (isPowerOfTwo(value) ? 0 : 1);
}
/*
* net.minecraft.util.math.MathHelper#log2DeBruijn(int)
*/
private static int log2DeBruijn(int value) {
value = isPowerOfTwo(value) ? value : smallestEncompassingPowerOfTwo(value);
return MULTIPLY_DE_BRUIJN_BIT_POSITION[(int)((long)value * 125613361L >> 27) & 31];
}
/*
* net.minecraft.util.math.MathHelper#smallestEncompassingPowerOfTwo(int)
*/
private static int smallestEncompassingPowerOfTwo(int value) {
int i = value - 1;
i = i | i >> 1;
i = i | i >> 2;
i = i | i >> 4;
i = i | i >> 8;
i = i | i >> 16;
return i + 1;
}
public static long toLong(BlockLocation location) {
return ((long)location.getX() & X_MASK) << X_SHIFT |
((long)location.getY() & Y_MASK) << Y_SHIFT |
((long)location.getZ() & Z_MASK);
}
public static BlockLocation fromLong(long value) {
BlockLocation location = BlockLocation.ZERO();
fromLong(value, location);
return location;
}
public static void fromLong(long value, BlockLocation location) {
location.setX((int)(value << 64 - X_SHIFT - NUM_X_BITS >> 64 - NUM_X_BITS));
location.setY((int)(value << 64 - Y_SHIFT - NUM_Y_BITS >> 64 - NUM_Y_BITS));
location.setZ((int)(value << 64 - NUM_Z_BITS >> 64 - NUM_Z_BITS));
}
}

32
proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/serializers/TestBlockLocationSerializer.java Normal file
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package mc.core.network.proto_1_12_2.serializers;
import mc.core.world.block.BlockLocation;
import org.junit.Before;
import org.junit.Test;
import java.util.concurrent.ThreadLocalRandom;
import static org.junit.Assert.*;
public class TestBlockLocationSerializer {
private static final ThreadLocalRandom rnd = ThreadLocalRandom.current();
private static final int minI = 0, maxI = 10;
private int x, y, z;
@Before
public void before() {
x = rnd.nextInt(minI, maxI);
y = rnd.nextInt(minI, maxI);
z = rnd.nextInt(minI, maxI);
}
@Test
public void test() {
BlockLocation location = new BlockLocation(x, y, z);
final long serializedCoords = BlockLocationSerializer.toLong(location);
BlockLocation deserLoc = BlockLocationSerializer.fromLong(serializedCoords);
assertEquals(location, deserLoc);
}
}