/
ChunkHelperImpl.java
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/
ChunkHelperImpl.java
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package com.denizenscript.denizen.nms.v1_16.helpers;
import com.denizenscript.denizen.utilities.implementation.DenizenCoreImplementation;
import com.denizenscript.denizen.nms.interfaces.ChunkHelper;
import com.denizenscript.denizencore.utilities.ReflectionHelper;
import com.denizenscript.denizencore.utilities.debugging.Debug;
import net.minecraft.server.v1_16_R3.*;
import org.bukkit.World;
import org.bukkit.Chunk;
import org.bukkit.craftbukkit.v1_16_R3.CraftChunk;
import org.bukkit.craftbukkit.v1_16_R3.CraftWorld;
import java.lang.invoke.MethodHandle;
import java.lang.reflect.Field;
public class ChunkHelperImpl implements ChunkHelper {
public final static Field chunkProviderServerThreadField;
public final static MethodHandle chunkProviderServerThreadFieldSetter;
public final static Field worldThreadField;
public final static MethodHandle worldThreadFieldSetter;
static {
chunkProviderServerThreadField = ReflectionHelper.getFields(ChunkProviderServer.class).get("serverThread");
chunkProviderServerThreadFieldSetter = ReflectionHelper.getFinalSetter(ChunkProviderServer.class, "serverThread");
worldThreadField = ReflectionHelper.getFields(net.minecraft.server.v1_16_R3.World.class).get("serverThread");
worldThreadFieldSetter = ReflectionHelper.getFinalSetter(net.minecraft.server.v1_16_R3.World.class, "serverThread");
}
public Thread resetServerThread;
@Override
public void changeChunkServerThread(World world) {
if (DenizenCoreImplementation.tagThread == null) {
return;
}
if (resetServerThread != null) {
return;
}
WorldServer nmsWorld = ((CraftWorld) world).getHandle();
ChunkProviderServer provider = nmsWorld.getChunkProvider();
try {
resetServerThread = (Thread) chunkProviderServerThreadField.get(provider);
chunkProviderServerThreadFieldSetter.invoke(provider, Thread.currentThread());
worldThreadFieldSetter.invoke(nmsWorld, Thread.currentThread());
}
catch (Throwable ex) {
Debug.echoError(ex);
}
}
@Override
public void restoreServerThread(World world) {
if (DenizenCoreImplementation.tagThread == null) {
return;
}
if (resetServerThread == null) {
return;
}
WorldServer nmsWorld = ((CraftWorld) world).getHandle();
ChunkProviderServer provider = nmsWorld.getChunkProvider();
try {
chunkProviderServerThreadFieldSetter.invoke(provider, resetServerThread);
worldThreadFieldSetter.invoke(nmsWorld, resetServerThread);
resetServerThread = null;
}
catch (Throwable ex) {
Debug.echoError(ex);
}
}
@Override
public void refreshChunkSections(Chunk chunk) {
// TODO: 1.16: is false for 'Ignore old data' in the packets below good?
PacketPlayOutMapChunk lowPacket = new PacketPlayOutMapChunk(((CraftChunk) chunk).getHandle(), 255); // 00000000 11111111
PacketPlayOutMapChunk highPacket = new PacketPlayOutMapChunk(((CraftChunk) chunk).getHandle(), 65280); // 11111111 00000000
ChunkCoordIntPair pos = new ChunkCoordIntPair(chunk.getX(), chunk.getZ());
PlayerChunk playerChunk = ((CraftWorld) chunk.getWorld()).getHandle().getChunkProvider().playerChunkMap.visibleChunks.get(pos.pair());
if (playerChunk == null) {
return;
}
playerChunk.players.a(pos, false).forEach(player -> {
player.playerConnection.sendPacket(lowPacket);
player.playerConnection.sendPacket(highPacket);
});
}
@Override
public int[] getHeightMap(Chunk chunk) {
HeightMap map = ((CraftChunk) chunk).getHandle().heightMap.get(HeightMap.Type.MOTION_BLOCKING);
int[] outputMap = new int[256];
for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
outputMap[x * 16 + y] = map.a(x, y);
}
}
return outputMap;
}
}