Merge pull request 'Block precise TechHider (preparation for block HullHider)' (#257) from hullTechHider into master

Reviewed-on: #257
Reviewed-by: YoyoNow <jwsteam@nidido.de>

.gitignore

@@ -1,6 +1,3 @@
-# Package Files
-*.jar
-
 # Gradle
 .gradle
 **/build/

SpigotCore_14/src/de/steamwar/techhider/ChunkHider14.java

@@ -20,122 +20,23 @@
 package de.steamwar.techhider;
 
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.UnpooledByteBufAllocator;
 
-import java.nio.ByteBuffer;
-import java.nio.LongBuffer;
+import java.util.Collections;
 import java.util.Set;
 
 public class ChunkHider14 extends ChunkHider9 {
 
     @Override
-    protected byte[] dataHider(int obfuscationTarget, Set<Integer> obfuscate, byte[] data, Integer primaryBitMask) {
-        ByteBuf buffer = UnpooledByteBufAllocator.DEFAULT.directBuffer(data.length + 100);
-        int i = 0;
+    protected void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip, boolean blockPrecise) {
+        out.writeShort(in.readShort()); // Block count
+        byte bitsPerBlock = in.readByte();
+        out.writeByte(bitsPerBlock);
 
-        while(primaryBitMask != 0){
-            while((primaryBitMask & 1) == 0){
-                primaryBitMask >>= 1;
-            }
-
-            buffer.writeBytes(data, i, 2); // Block count
-            i += 2;
-            byte bitsPerBlock = data[i++];
-            buffer.writeByte(bitsPerBlock);
-
-            if(bitsPerBlock < 9){
-                int paletteLength = ProtocolUtils.readVarInt(data, i);
-                int paletteLengthLength = ProtocolUtils.readVarIntLength(data, i);
-                buffer.writeBytes(data, i, paletteLengthLength);
-                i += paletteLengthLength;
-                for(int actPaletteId = 0; actPaletteId < paletteLength; actPaletteId++){
-                    int blockId = ProtocolUtils.readVarInt(data, i);
-                    int actPaletteLength = ProtocolUtils.readVarIntLength(data, i);
-
-                    if(obfuscate.contains(blockId)){
-                        buffer.writeBytes(ProtocolUtils.writeVarInt(obfuscationTarget));
-                    }else{
-                        buffer.writeBytes(data, i, actPaletteLength);
-                    }
-                    i += actPaletteLength;
-                }
-
-                //We modify only the chunk palette for performance reasons
-                int dataArrayLength = ProtocolUtils.readVarInt(data, i);
-                int dataArrayLengthLength = ProtocolUtils.readVarIntLength(data, i);
-                buffer.writeBytes(data, i, dataArrayLength * 8 + dataArrayLengthLength);
-                i += dataArrayLengthLength;
-                i += dataArrayLength * 8;
-            }else{
-                //Full Chunk/no palette, so the chunk has to be crawled through
-                int dataArrayLength = ProtocolUtils.readVarInt(data, i);
-                int dataArrayLengthLength = ProtocolUtils.readVarIntLength(data, i);
-                buffer.writeBytes(data, i, dataArrayLengthLength);
-                i += dataArrayLengthLength;
-
-                ByteBuffer source = ByteBuffer.wrap(data, i, dataArrayLength * 8);
-                VariableValueArray values = new VariableValueArray(bitsPerBlock, dataArrayLength, source.asLongBuffer());
-
-                for(int pos = 0; pos < 4096; pos++){
-                    if(obfuscate.contains(values.get(pos))){
-                        values.set(pos, obfuscationTarget);
-                    }
-                }
-
-                for(long l : values.backing)
-                    buffer.writeLong(l);
-
-                i += dataArrayLength * 8;
-            }
-
-            primaryBitMask >>= 1;
-        }
-        buffer.writeBytes(data, i, data.length - i); // MC appends a 0 byte at the end if there is a full chunk, idk why
-
-        data = new byte[buffer.readableBytes()];
-        buffer.readBytes(data);
-        return data;
-    }
-
-    private static final class VariableValueArray {
-        private final long[] backing;
-        private final int bitsPerValue;
-        private final long valueMask;
-
-        public VariableValueArray(int bitsPerEntry, int dataArrayLength, LongBuffer buffer) {
-            this.bitsPerValue = bitsPerEntry;
-            this.backing = new long[dataArrayLength];
-            buffer.get(backing);
-            this.valueMask = (1L << this.bitsPerValue) - 1;
+        if(bitsPerBlock < 9) {
+            obfuscationTarget = ChunkHider.processPalette(obfuscationTarget, obfuscate, in, out);
+            obfuscate = Collections.emptySet();
         }
 
-        public int get(int index) {
-            index *= bitsPerValue;
-            int i0 = index >> 6;
-            int i1 = index & 0x3f;
-
-            long value = backing[i0] >>> i1;
-
-            // The value is divided over two long values
-            if (i1 + bitsPerValue > 64) {
-                value |= backing[++i0] << 64 - i1;
-            }
-
-            return (int) (value & valueMask);
-        }
-
-        public void set(int index, int value) {
-            index *= bitsPerValue;
-            int i0 = index >> 6;
-            int i1 = index & 0x3f;
-
-            backing[i0] = this.backing[i0] & ~(this.valueMask << i1) | (value & valueMask) << i1;
-            int i2 = i1 + bitsPerValue;
-            // The value is divided over two long values
-            if (i2 > 64) {
-                i0++;
-                backing[i0] = backing[i0] & -(1L << i2 - 64) | value >> 64 - i1;
-            }
-        }
+        processDataArray(locationEvaluator, obfuscationTarget, obfuscate, in, out, bitsPerBlock, skip || (!blockPrecise && bitsPerBlock < 9));
     }
 }

SpigotCore_14/src/de/steamwar/techhider/ProtocolWrapper14.java

@@ -30,21 +30,23 @@ import java.util.function.UnaryOperator;
 public class ProtocolWrapper14 extends ProtocolWrapper8 {
 
     @Override
-    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass) {
+    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator) {
         UnaryOperator<Object> blockBreakCloner = ProtocolUtils.shallowCloneGenerator(blockBreakPacket);
         Reflection.FieldAccessor<?> blockBreakPosition = Reflection.getField(blockBreakPacket, TechHider.blockPosition, 0);
         Reflection.FieldAccessor<?> blockBreakBlockData = Reflection.getField(blockBreakPacket, TechHider.iBlockData, 0);
 
         return (p, packet) -> {
-            Object pos = blockBreakPosition.get(packet);
-            if(bypass.bypass(p, ProtocolUtils.posToChunk(TechHider.blockPositionX.get(pos)), ProtocolUtils.posToChunk(TechHider.blockPositionZ.get(pos))))
-                return packet;
-
-            if(TechHider.iBlockDataHidden(obfuscate, blockBreakBlockData.get(packet))){
-                packet = blockBreakCloner.apply(packet);
-                blockBreakBlockData.set(packet, obfuscationTarget);
+            switch (locationEvaluator.checkBlockPos(p, blockBreakPosition.get(packet))) {
+                case SKIP:
+                    return packet;
+                case CHECK:
+                    if(!TechHider.iBlockDataHidden(obfuscate, blockBreakBlockData.get(packet)))
+                        return packet;
+                default:
+                    packet = blockBreakCloner.apply(packet);
+                    blockBreakBlockData.set(packet, obfuscationTarget);
+                    return packet;
             }
-            return packet;
         };
     }
 }

SpigotCore_18/src/de/steamwar/techhider/ChunkHider18.java

@@ -22,21 +22,19 @@ package de.steamwar.techhider;
 import com.comphenix.tinyprotocol.Reflection;
 import de.steamwar.core.Core;
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.UnpooledByteBufAllocator;
+import io.netty.buffer.Unpooled;
 import net.minecraft.core.IRegistry;
 import net.minecraft.network.protocol.game.ClientboundLevelChunkPacketData;
 import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
 import net.minecraft.resources.MinecraftKey;
 import net.minecraft.util.SimpleBitStorage;
 import net.minecraft.world.level.block.entity.TileEntityTypes;
-import org.bukkit.World;
 import org.bukkit.entity.Player;
 
-import java.nio.ByteBuffer;
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.function.BiFunction;
-import java.util.function.IntFunction;
 import java.util.function.UnaryOperator;
 import java.util.stream.Collectors;
 
@@ -49,29 +47,42 @@ public class ChunkHider18 implements ChunkHider {
     private static final UnaryOperator<Object> chunkPacketCloner = ProtocolUtils.shallowCloneGenerator(ClientboundLevelChunkWithLightPacket.class);
     private static final UnaryOperator<Object> chunkDataCloner = ProtocolUtils.shallowCloneGenerator(ClientboundLevelChunkPacketData.class);
 
-    private static final Reflection.FieldAccessor<Integer> chunkX = Reflection.getField(ClientboundLevelChunkWithLightPacket.class, int.class, 0);
-    private static final Reflection.FieldAccessor<Integer> chunkZ = Reflection.getField(ClientboundLevelChunkWithLightPacket.class, int.class, 1);
+    private static final Reflection.FieldAccessor<Integer> chunkXField = Reflection.getField(ClientboundLevelChunkWithLightPacket.class, int.class, 0);
+    private static final Reflection.FieldAccessor<Integer> chunkZField = Reflection.getField(ClientboundLevelChunkWithLightPacket.class, int.class, 1);
     private static final Reflection.FieldAccessor<ClientboundLevelChunkPacketData> chunkData = Reflection.getField(ClientboundLevelChunkWithLightPacket.class, ClientboundLevelChunkPacketData.class, 0);
 
     private static final Reflection.FieldAccessor<byte[]> dataField = Reflection.getField(ClientboundLevelChunkPacketData.class, byte[].class, 0);
     private static final Reflection.FieldAccessor<List> tileEntities = Reflection.getField(ClientboundLevelChunkPacketData.class, List.class, 0);
 
     @Override
-    public BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.BypassEvaluator bypass, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities) {
+    public BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.LocationEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities) {
         return (p, packet) -> {
-            if(bypass.bypass(p, chunkX.get(packet), chunkZ.get(packet)))
+            int chunkX = chunkXField.get(packet);
+            int chunkZ = chunkZField.get(packet);
+            if (locationEvaluator.skipChunk(p, chunkX, chunkZ))
                 return packet;
 
             packet = chunkPacketCloner.apply(packet);
-            Object data = chunkDataCloner.apply(chunkData.get(packet));
+            Object dataWrapper = chunkDataCloner.apply(chunkData.get(packet));
 
-            tileEntities.set(data, ((List<?>)tileEntities.get(data)).stream().filter(te -> tileEntityVisible(hiddenBlockEntities, te)).collect(Collectors.toList()));
+            tileEntities.set(dataWrapper, ((List<?>)tileEntities.get(dataWrapper)).stream().filter(te -> tileEntityVisible(hiddenBlockEntities, te)).collect(Collectors.toList()));
 
-            World world = p.getWorld();
-            int sections = (world.getMaxHeight() - world.getMinHeight()) / 16;
-            dataField.set(data, dataHider(obfuscationTarget, obfuscate, dataField.get(data), sections));
+            ByteBuf in = Unpooled.wrappedBuffer(dataField.get(dataWrapper));
+            ByteBuf out = Unpooled.buffer(in.readableBytes() + 64);
+            int xOffset = 16*chunkX;
+            int zOffset = 16*chunkZ;
+            for(int yOffset = p.getWorld().getMinHeight(); yOffset < p.getWorld().getMaxHeight(); yOffset += 16) {
+                int finalYOffset = yOffset;
+                int chunkY = yOffset/16;
+                dataHider((x, y, z) -> locationEvaluator.check(p, x+xOffset, y+finalYOffset, z+zOffset), obfuscationTarget, obfuscate, in, out, locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ), locationEvaluator.blockPrecise(p, chunkX, chunkY, chunkZ));
+            }
+            out.writeBytes(in); // MC appends a 0 byte at the end if there is a full chunk, idk why
 
-            chunkData.set(packet, data);
+            byte[] data = new byte[out.readableBytes()];
+            out.readBytes(data);
+            dataField.set(dataWrapper, data);
+
+            chunkData.set(packet, dataWrapper);
             return packet;
         };
     }
@@ -85,72 +96,67 @@ public class ChunkHider18 implements ChunkHider {
         return !hiddenBlockEntities.contains((String) getName.invoke(getKey.invoke(tileEntityTypes, entityType.get(tile))));
     }
 
-    private byte[] dataHider(int obfuscationTarget, Set<Integer> obfuscate, byte[] data, int sections) {
-        ByteBuf buffer = UnpooledByteBufAllocator.DEFAULT.directBuffer(data.length + 100);
-        int i = 0;
+    private void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip, boolean blockPrecise) {
+        out.writeShort(in.readShort()); // Block count
 
-        while(sections-- > 0) {
-            buffer.writeBytes(data, i, 2); // Block count
-            i += 2;
+        containerWalker(in, out, 15, obfuscationTarget, skip ? Collections.emptySet() : obfuscate, (paletteTarget, dataArrayLength, bitsPerBlock) -> {
+            Set<Integer> palettedObfuscate;
+            if(bitsPerBlock < 15) {
+                palettedObfuscate = Collections.emptySet();
+            } else {
+                paletteTarget = obfuscationTarget;
+                palettedObfuscate = obfuscate;
+            }
 
-            i = containerWalker(data, buffer, i, 15, blockId -> obfuscate.contains(blockId) ? obfuscationTarget : blockId, (curI, dataArrayLength, bitsPerBlock) -> {
-                if(bitsPerBlock < 15) {
-                    buffer.writeBytes(data, curI, dataArrayLength * 8);
-                } else {
-                    ByteBuffer source = ByteBuffer.wrap(data, curI, dataArrayLength * 8);
-                    long[] array = new long[dataArrayLength];
-                    source.asLongBuffer().get(array);
-                    SimpleBitStorage values = new SimpleBitStorage(bitsPerBlock, 4096, array);
+            if(skip || dataArrayLength == 0 || (!blockPrecise && bitsPerBlock < 15)) {
+                out.writeBytes(in, dataArrayLength*8);
+                return;
+            }
 
-                    for (int pos = 0; pos < 4096; pos++) {
-                        if (obfuscate.contains(values.a(pos))) {
-                            values.b(pos, obfuscationTarget);
+            long[] array = new long[dataArrayLength];
+            for(int i = 0; i < dataArrayLength; i++)
+                array[i] = in.readLong();
+            SimpleBitStorage values = new SimpleBitStorage(bitsPerBlock, 4096, array);
+
+            for (int y = 0; y < 16; y++) {
+                for (int z = 0; z < 16; z++) {
+                    for (int x = 0; x < 16; x++) {
+                        int pos = (((y * 16) + z) * 16) + x;
+
+                        switch (locationEvaluator.test(x, y, z)) {
+                            case SKIP:
+                                break;
+                            case CHECK:
+                                if(!palettedObfuscate.contains(values.a(pos)))
+                                    break;
+                            default:
+                                values.b(pos, paletteTarget);
                         }
                     }
-
-                    for (long l : values.a())
-                        buffer.writeLong(l);
                 }
-            });
-            i = containerWalker(data, buffer, i, 6, value -> value, (curI, dataArrayLength, bitsPerBlock) -> buffer.writeBytes(data, curI, dataArrayLength * 8));
-        }
-        buffer.writeBytes(data, i, data.length - i); // MC appends a 0 byte at the end if there is a full chunk, idk why
+            }
 
-        byte[] outdata = new byte[buffer.readableBytes()];
-        buffer.readBytes(outdata);
-        return outdata;
+            for (long l : values.a())
+                out.writeLong(l);
+        });
+        containerWalker(in, out, 6, 0, Collections.emptySet(), (paletteTarget, dataArrayLength, bitsPerBlock) -> out.writeBytes(in, dataArrayLength * 8)); // Biomes
     }
 
-    private int containerWalker(byte[] data, ByteBuf buffer, int i, int globalPalette, IntFunction<Integer> palette, TriConsumer<Integer, Integer, Byte> dataArray) {
-        byte bitsPerBlock = data[i++];
-        buffer.writeByte(bitsPerBlock);
+    private void containerWalker(ByteBuf in, ByteBuf out, int globalPalette, int obfuscationTarget, Set<Integer> obfuscate, TriConsumer<Integer, Integer, Byte> dataArray) {
+        byte bitsPerBlock = in.readByte();
+        out.writeByte(bitsPerBlock);
 
+        //blockId -> obfuscate.contains(blockId) ? obfuscationTarget : blockId
         if(bitsPerBlock == 0) {
-            int paletteValue = ProtocolUtils.readVarInt(data, i);
-            i += ProtocolUtils.readVarIntLength(data, i);
-            buffer.writeBytes(ProtocolUtils.writeVarInt(palette.apply(paletteValue)));
+            int value = ProtocolUtils.readVarInt(in);
+            ProtocolUtils.writeVarInt(out, obfuscate.contains(value) ? obfuscationTarget : value);
         }else if(bitsPerBlock < globalPalette) {
-            int paletteLength = ProtocolUtils.readVarInt(data, i);
-            int paletteLengthLength = ProtocolUtils.readVarIntLength(data, i);
-            buffer.writeBytes(data, i, paletteLengthLength);
-            i += paletteLengthLength;
-
-            for(int actPaletteId = 0; actPaletteId < paletteLength; actPaletteId++) {
-                int paletteValue = ProtocolUtils.readVarInt(data, i);
-                i += ProtocolUtils.readVarIntLength(data, i);
-                buffer.writeBytes(ProtocolUtils.writeVarInt(palette.apply(paletteValue)));
-            }
+            obfuscationTarget = ChunkHider.processPalette(obfuscationTarget, obfuscate, in, out);
         }
 
-        int dataArrayLength = ProtocolUtils.readVarInt(data, i);
-        int dataArrayLengthLength = ProtocolUtils.readVarIntLength(data, i);
-        buffer.writeBytes(data, i, dataArrayLengthLength);
-        i += dataArrayLengthLength;
-
-        dataArray.accept(i, dataArrayLength, bitsPerBlock);
-        i += dataArrayLength * 8;
-
-        return i;
+        int dataArrayLength = ProtocolUtils.readVarInt(in);
+        ProtocolUtils.writeVarInt(out, dataArrayLength);
+        dataArray.accept(obfuscationTarget, dataArrayLength, bitsPerBlock);
     }
 
     private interface TriConsumer<X, Y, Z> {

SpigotCore_18/src/de/steamwar/techhider/ProtocolWrapper18.java

@@ -28,24 +28,56 @@ import net.minecraft.world.level.block.state.IBlockData;
 import org.bukkit.Material;
 import org.bukkit.entity.Player;
 
+import java.util.ArrayList;
 import java.util.Set;
 import java.util.function.BiFunction;
-import java.util.function.UnaryOperator;
 
 public class ProtocolWrapper18 implements ProtocolWrapper {
 
     private static final Reflection.FieldAccessor<SectionPosition> multiBlockChangeChunk = Reflection.getField(TechHider.multiBlockChangePacket, SectionPosition.class, 0);
+    private static final Reflection.FieldAccessor<short[]> multiBlockChangePos = Reflection.getField(TechHider.multiBlockChangePacket, short[].class, 0);
     private static final Reflection.FieldAccessor<IBlockData[]> multiBlockChangeBlocks = Reflection.getField(TechHider.multiBlockChangePacket, IBlockData[].class, 0);
-    private static final BiFunction<Object, UnaryOperator<Object>, Object> iBlockDataArrayCloner = ProtocolUtils.arrayCloneGenerator(TechHider.iBlockData);
     @Override
-    public BiFunction<Player, Object, Object> multiBlockChangeGenerator(Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass) {
+    public BiFunction<Player, Object, Object> multiBlockChangeGenerator(Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator) {
         return (p, packet) -> {
             Object chunkCoords = multiBlockChangeChunk.get(packet);
-            if(bypass.bypass(p, TechHider.blockPositionX.get(chunkCoords), TechHider.blockPositionZ.get(chunkCoords)))
+            int chunkX = TechHider.blockPositionX.get(chunkCoords);
+            int chunkY = TechHider.blockPositionY.get(chunkCoords);
+            int chunkZ = TechHider.blockPositionZ.get(chunkCoords);
+            if(locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ))
                 return packet;
 
             packet = TechHider.multiBlockChangeCloner.apply(packet);
-            multiBlockChangeBlocks.set(packet, iBlockDataArrayCloner.apply(multiBlockChangeBlocks.get(packet), block -> TechHider.iBlockDataHidden(obfuscate, block) ? obfuscationTarget : block));
+            final short[] oldPos = multiBlockChangePos.get(packet);
+            final IBlockData[] oldBlocks = multiBlockChangeBlocks.get(packet);
+            ArrayList<Short> poss = new ArrayList<>(oldPos.length);
+            ArrayList<IBlockData> blocks = new ArrayList<>(oldPos.length);
+            for(int i = 0; i < oldPos.length; i++) {
+                short pos = oldPos[i];
+                IBlockData block = oldBlocks[i];
+                switch(locationEvaluator.check(p, 16*chunkX + (pos >> 8 & 0xF), 16*chunkY + (pos & 0xF), 16*chunkZ + (pos >> 4 & 0xF))) {
+                    case SKIP:
+                        poss.add(pos);
+                        blocks.add(block);
+                        break;
+                    case CHECK:
+                        poss.add(pos);
+                        blocks.add(TechHider.iBlockDataHidden(obfuscate, block) ? (IBlockData) obfuscationTarget : block);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            if(blocks.isEmpty())
+                return null;
+
+            short[] newPos = new short[poss.size()];
+            for(int i = 0; i < newPos.length; i++)
+                newPos[i] = poss.get(i);
+
+            multiBlockChangePos.set(packet, newPos);
+            multiBlockChangeBlocks.set(packet, blocks.toArray(new IBlockData[0]));
             return packet;
         };
     }
@@ -58,16 +90,18 @@ public class ProtocolWrapper18 implements ProtocolWrapper {
     }
 
     @Override
-    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass) {
+    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator) {
         return (p, packet) -> {
             PacketPlayOutBlockBreak breakPacket = (PacketPlayOutBlockBreak) packet;
-            if(bypass.bypass(p, ProtocolUtils.posToChunk(TechHider.blockPositionX.get(breakPacket.b())), ProtocolUtils.posToChunk(TechHider.blockPositionZ.get(breakPacket.b()))))
-                return packet;
-
-            if(!TechHider.iBlockDataHidden(obfuscate, breakPacket.c()))
-                return packet;
-
-            return new PacketPlayOutBlockBreak(breakPacket.b(), (IBlockData) obfuscationTarget, breakPacket.d(), breakPacket.a());
+            switch (locationEvaluator.checkBlockPos(p, breakPacket.b())) {
+                case SKIP:
+                    return packet;
+                case CHECK:
+                    if(!TechHider.iBlockDataHidden(obfuscate, breakPacket.c()))
+                        return packet;
+                default:
+                    return new PacketPlayOutBlockBreak(breakPacket.b(), (IBlockData) obfuscationTarget, breakPacket.d(), breakPacket.a());
+            }
         };
     }
 }

SpigotCore_19/src/de/steamwar/techhider/ProtocolWrapper19.java

@@ -28,7 +28,7 @@ import java.util.function.BiFunction;
 public class ProtocolWrapper19 extends ProtocolWrapper18 {
 
     @Override
-    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass) {
+    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator) {
         return null;
     }
 }

SpigotCore_8/src/de/steamwar/techhider/ChunkHider8.java

@@ -34,7 +34,7 @@ public class ChunkHider8 implements ChunkHider {
     }
 
     @Override
-    public BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.BypassEvaluator bypass, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities) {
+    public BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.LocationEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities) {
         return (player, packet) -> packet;
     }
 }

SpigotCore_8/src/de/steamwar/techhider/ProtocolWrapper8.java

@@ -23,9 +23,10 @@ import com.comphenix.tinyprotocol.Reflection;
 import org.bukkit.Material;
 import org.bukkit.entity.Player;
 
+import java.lang.reflect.Array;
+import java.util.ArrayList;
 import java.util.Set;
 import java.util.function.BiFunction;
-import java.util.function.UnaryOperator;
 
 public class ProtocolWrapper8 implements ProtocolWrapper {
     private static final Class<?> chunkCoordinateIntPair = Reflection.getClass("{nms}.ChunkCoordIntPair");
@@ -34,25 +35,41 @@ public class ProtocolWrapper8 implements ProtocolWrapper {
     private static final Reflection.FieldAccessor<Integer> chunkCoordinateZ = Reflection.getField(chunkCoordinateIntPair, int.class, 1);
     private static final Class<?> multiBlockChangeInfo = Reflection.getClass("{nms}.PacketPlayOutMultiBlockChange$MultiBlockChangeInfo");
     private static final Reflection.ConstructorInvoker multiBlockChangeInfoConstructor = Reflection.getConstructor(multiBlockChangeInfo, TechHider.multiBlockChangePacket, short.class, TechHider.iBlockData);
-    private static final BiFunction<Object, UnaryOperator<Object>, Object> multiBlockChangeInfoArrayCloner = ProtocolUtils.arrayCloneGenerator(multiBlockChangeInfo);
     private static final Reflection.FieldAccessor<?> multiBlockChangeInfoBlock = Reflection.getField(multiBlockChangeInfo, TechHider.iBlockData, 0);
     private static final Reflection.FieldAccessor<?> multiBlockChangeInfoPos = Reflection.getField(multiBlockChangeInfo, short.class, 0);
     private static final Class<?> multiBlockChangeInfoArray = Reflection.getClass("[L{nms}.PacketPlayOutMultiBlockChange$MultiBlockChangeInfo;");
     private static final Reflection.FieldAccessor<?> multiBlockChangeInfos = Reflection.getField(TechHider.multiBlockChangePacket, multiBlockChangeInfoArray, 0);
     @Override
-    public BiFunction<Player, Object, Object> multiBlockChangeGenerator(Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass) {
+    public BiFunction<Player, Object, Object> multiBlockChangeGenerator(Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator) {
         return (p, packet) -> {
             Object chunkCoords = multiBlockChangeChunk.get(packet);
-            if(bypass.bypass(p, chunkCoordinateX.get(chunkCoords), chunkCoordinateZ.get(chunkCoords)))
+            int chunkX = chunkCoordinateX.get(chunkCoords);
+            int chunkZ = chunkCoordinateZ.get(chunkCoords);
+            if(locationEvaluator.skipChunk(p, chunkX, chunkZ))
                 return packet;
 
-            Object modpacket = TechHider.multiBlockChangeCloner.apply(packet);
-            multiBlockChangeInfos.set(modpacket, multiBlockChangeInfoArrayCloner.apply(multiBlockChangeInfos.get(modpacket), mbci -> {
-                if(TechHider.iBlockDataHidden(obfuscate, multiBlockChangeInfoBlock.get(mbci)))
-                    return multiBlockChangeInfoConstructor.invoke(modpacket, multiBlockChangeInfoPos.get(mbci), obfuscationTarget);
-                return mbci;
-            }));
-            return modpacket;
+            packet = TechHider.multiBlockChangeCloner.apply(packet);
+            Object[] mbcis = (Object[]) multiBlockChangeInfos.get(packet);
+            ArrayList<Object> blockChangeInfos = new ArrayList<>(mbcis.length);
+            for(Object mbci : mbcis) {
+                short pos = (short) multiBlockChangeInfoPos.get(mbci);
+                switch(locationEvaluator.check(p, 16*chunkX + (pos >> 12 & 0xF), pos & 0xFF, 16*chunkZ + (pos >> 8 & 0xF))) {
+                    case SKIP:
+                        blockChangeInfos.add(mbci);
+                        break;
+                    case CHECK:
+                        blockChangeInfos.add(TechHider.iBlockDataHidden(obfuscate, multiBlockChangeInfoBlock.get(mbci)) ? multiBlockChangeInfoConstructor.invoke(packet, pos, obfuscationTarget) : mbci);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            if(blockChangeInfos.isEmpty())
+                return null;
+
+            multiBlockChangeInfos.set(packet, blockChangeInfos.toArray((Object[])Array.newInstance(multiBlockChangeInfo, 0)));
+            return packet;
         };
     }
 
@@ -63,7 +80,7 @@ public class ProtocolWrapper8 implements ProtocolWrapper {
     }
 
     @Override
-    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass) {
+    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator bypass) {
         return null;
     }
 }

SpigotCore_9/src/de/steamwar/techhider/ChunkHider9.java

@@ -21,15 +21,14 @@ package de.steamwar.techhider;
 
 import com.comphenix.tinyprotocol.Reflection;
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.UnpooledByteBufAllocator;
-import org.bukkit.Bukkit;
+import io.netty.buffer.Unpooled;
 import org.bukkit.entity.Player;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.function.BiFunction;
 import java.util.function.UnaryOperator;
-import java.util.logging.Level;
 import java.util.stream.Collectors;
 
 public class ChunkHider9 extends ChunkHider8 {
@@ -46,9 +45,11 @@ public class ChunkHider9 extends ChunkHider8 {
     private static final Reflection.MethodInvoker nbtTagGetString = Reflection.getTypedMethod(nbtTagCompound, null, String.class, String.class);
 
     @Override
-    public BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.BypassEvaluator bypass, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities) {
+    public BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.LocationEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities) {
         return (p, packet) -> {
-            if(bypass.bypass(p, mapChunkX.get(packet), mapChunkZ.get(packet)))
+            int chunkX = mapChunkX.get(packet);
+            int chunkZ = mapChunkZ.get(packet);
+            if (locationEvaluator.skipChunk(p, chunkX, chunkZ))
                 return packet;
 
             packet = mapChunkCloner.apply(packet);
@@ -56,53 +57,113 @@ public class ChunkHider9 extends ChunkHider8 {
                     nbttag -> !hiddenBlockEntities.contains((String) nbtTagGetString.invoke(nbttag, "id"))
             ).collect(Collectors.toList()));
 
-            byte[] data = dataHider(obfuscationTarget, obfuscate, mapChunkData.get(packet), mapChunkBitMask.get(packet));
+            int xOffset = 16*chunkX;
+            int zOffset = 16*chunkZ;
+            int primaryBitMask = mapChunkBitMask.get(packet);
+            ByteBuf in = Unpooled.wrappedBuffer(mapChunkData.get(packet));
+            ByteBuf out = Unpooled.buffer(in.readableBytes() + 64);
+            for(int chunkY = 0; chunkY < p.getWorld().getMaxHeight(); chunkY++) {
+                if(((1 << chunkY) & primaryBitMask) == 0)
+                    continue;
+
+                int yOffset = 16*chunkY;
+                dataHider((x, y, z) -> locationEvaluator.check(p, x+xOffset, y+yOffset, z+zOffset), obfuscationTarget, obfuscate, in, out, locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ), locationEvaluator.blockPrecise(p, chunkX, chunkY, chunkZ));
+            }
+            byte[] data = new byte[out.readableBytes()];
+            out.readBytes(data);
             mapChunkData.set(packet, data);
 
             return packet;
         };
     }
 
-    protected byte[] dataHider(int obfuscationTarget, Set<Integer> obfuscate, byte[] data, Integer primaryBitMask) {
-        ByteBuf buffer = UnpooledByteBufAllocator.DEFAULT.directBuffer(data.length + 100);
-        int i = 0;
+    protected void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip, boolean blockPrecise) {
+        byte bitsPerBlock = in.readByte();
+        out.writeByte(bitsPerBlock);
 
-        while(i < data.length){
-            byte bitsPerBlock = data[i++];
-            buffer.writeByte(bitsPerBlock);
-
-            if(bitsPerBlock != 13){
-                int paletteLength = ProtocolUtils.readVarInt(data, i);
-                int paletteLengthLength = ProtocolUtils.readVarIntLength(data, i);
-                buffer.writeBytes(data, i, paletteLengthLength);
-                i += paletteLengthLength;
-
-                for(int actPaletteId = 0; actPaletteId < paletteLength; actPaletteId++){
-                    int entry = ProtocolUtils.readVarInt(data, i);
-                    i += ProtocolUtils.readVarIntLength(data, i);
-
-                    if(obfuscate.contains(entry)){
-                        entry = obfuscationTarget;
-                    }
-                    buffer.writeBytes(ProtocolUtils.writeVarInt(entry));
-                }
-            }else{
-                buffer.writeByte(data[++i]); //Empty palette
-                Bukkit.getLogger().log(Level.SEVERE, "Full chunk occured");
-            }
-
-            int dataArrayLength = ProtocolUtils.readVarInt(data, i);
-            int dataArrayLengthLength = ProtocolUtils.readVarIntLength(data, i);
-            buffer.writeBytes(data, i, dataArrayLength*8 + dataArrayLengthLength);
-            i += dataArrayLengthLength;
-            i += dataArrayLength * 8;
-
-            buffer.writeBytes(data, i, 4096);
-            i += 4096; //Skylight (Not in Nether/End!!!) 2048 + Blocklight 2048
+        int paletteTarget = ChunkHider.processPalette(obfuscationTarget, skip ? Collections.emptySet() : obfuscate, in, out);
+        if(bitsPerBlock < 13) {
+            obfuscationTarget = paletteTarget;
+            obfuscate = Collections.emptySet();
         }
 
-        data = new byte[buffer.readableBytes()];
-        buffer.readBytes(data);
-        return data;
+        processDataArray(locationEvaluator, obfuscationTarget, obfuscate, in, out, bitsPerBlock, skip || (!blockPrecise && bitsPerBlock < 9));
+
+        out.writeBytes(in, 4096); //Skylight (Not in Nether/End!!!) 2048 + Blocklight 2048
+    }
+
+    protected void processDataArray(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, int bitsPerBlock, boolean skip) {
+        int dataArrayLength = ProtocolUtils.readVarInt(in);
+        ProtocolUtils.writeVarInt(out, dataArrayLength);
+
+        if(skip) {
+            out.writeBytes(in, dataArrayLength*8);
+            return;
+        }
+
+        VariableValueArray values = new VariableValueArray(bitsPerBlock, dataArrayLength, in);
+        for (int y = 0; y < 16; y++) {
+            for (int z = 0; z < 16; z++) {
+                for (int x = 0; x < 16; x++) {
+                    int pos = (((y * 16) + z) * 16) + x;
+
+                    switch (locationEvaluator.test(x, y, z)) {
+                        case SKIP:
+                            break;
+                        case CHECK:
+                            if(!obfuscate.contains(values.get(pos)))
+                                break;
+                        default:
+                            values.set(pos, obfuscationTarget);
+                    }
+                }
+            }
+        }
+
+        for(long l : values.backing)
+            out.writeLong(l);
+    }
+
+    private static class VariableValueArray {
+        private final long[] backing;
+        private final int bitsPerValue;
+        private final long valueMask;
+
+        public VariableValueArray(int bitsPerEntry, int dataArrayLength, ByteBuf in) {
+            this.bitsPerValue = bitsPerEntry;
+            this.valueMask = (1L << this.bitsPerValue) - 1;
+
+            this.backing = new long[dataArrayLength];
+            for(int i = 0; i < dataArrayLength; i++)
+                backing[i] = in.readLong();
+        }
+
+        public int get(int index) {
+            index *= bitsPerValue;
+            int i0 = index >> 6;
+            int i1 = index & 0x3f;
+
+            long value = backing[i0] >>> i1;
+
+            // The value is divided over two long values
+            if (i1 + bitsPerValue > 64)
+                value |= backing[++i0] << 64 - i1;
+
+            return (int) (value & valueMask);
+        }
+
+        public void set(int index, int value) {
+            index *= bitsPerValue;
+            int i0 = index >> 6;
+            int i1 = index & 0x3f;
+
+            backing[i0] = backing[i0] & ~(valueMask << i1) | (value & valueMask) << i1;
+            int i2 = i1 + bitsPerValue;
+            // The value is divided over two long values
+            if (i2 > 64) {
+                i0++;
+                backing[i0] = backing[i0] & -(1L << i2 - 64) | value >> 64 - i1;
+            }
+        }
     }
 }

SpigotCore_Main/src/de/steamwar/techhider/ChunkHider.java

@@ -21,6 +21,7 @@ package de.steamwar.techhider;
 
 import de.steamwar.core.Core;
 import de.steamwar.core.VersionDependent;
+import io.netty.buffer.ByteBuf;
 import org.bukkit.entity.Player;
 
 import java.util.Set;
@@ -30,5 +31,29 @@ public interface ChunkHider {
     ChunkHider impl = VersionDependent.getVersionImpl(Core.getInstance());
 
     Class<?> mapChunkPacket();
-    BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.BypassEvaluator bypass, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities);
+    BiFunction<Player, Object, Object> chunkHiderGenerator(TechHider.LocationEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, Set<String> hiddenBlockEntities);
+
+    static int processPalette(int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out) {
+        int paletteLength = ProtocolUtils.readVarInt(in);
+        ProtocolUtils.writeVarInt(out, paletteLength);
+
+        int paletteTarget = 0;
+
+        for(int i = 0; i < paletteLength; i++) {
+            int entry = ProtocolUtils.readVarInt(in);
+            if(obfuscate.contains(entry))
+                entry = obfuscationTarget;
+
+            if(entry == obfuscationTarget)
+                paletteTarget = i;
+
+            ProtocolUtils.writeVarInt(out, entry);
+        }
+
+        return paletteTarget;
+    }
+
+    interface PosEvaluator {
+        TechHider.State test(int x, int y, int z);
+    }
 }

SpigotCore_Main/src/de/steamwar/techhider/ProtocolUtils.java

@@ -22,6 +22,7 @@ package de.steamwar.techhider;
 import com.comphenix.tinyprotocol.Reflection;
 import com.comphenix.tinyprotocol.TinyProtocol;
 import com.google.common.primitives.Bytes;
+import io.netty.buffer.ByteBuf;
 import org.bukkit.Bukkit;
 
 import java.lang.reflect.Array;
@@ -40,6 +41,7 @@ public class ProtocolUtils {
         Bukkit.getOnlinePlayers().forEach(player -> TinyProtocol.instance.sendPacket(player, packet));
     }
 
+    @Deprecated
     public static BiFunction<Object, UnaryOperator<Object>, Object> arrayCloneGenerator(Class<?> elementClass) {
         return (array, worker) -> {
             int length = Array.getLength(array);
@@ -93,11 +95,12 @@ public class ProtocolUtils {
 
     public static int posToChunk(int c){
         int chunk = c / 16;
-        if(c<0)
+        if(c < 0)
             chunk--;
         return chunk;
     }
 
+    @Deprecated
     public static int readVarInt(byte[] array, int startPos) {
         int numRead = 0;
         int result = 0;
@@ -116,6 +119,35 @@ public class ProtocolUtils {
         return result;
     }
 
+    public static int readVarInt(ByteBuf buf) {
+        int numRead = 0;
+        int result = 0;
+        byte read;
+        do {
+            read = buf.readByte();
+            int value = (read & 0b01111111);
+            result |= (value << (7 * numRead));
+
+            if (++numRead > 5)
+                throw new SecurityException("VarInt too long");
+        } while ((read & 0b10000000) != 0);
+
+        return result;
+    }
+
+    public static void writeVarInt(ByteBuf buf, int value) {
+        do {
+            int temp = value & 0b01111111;
+            // Note: >>> means that the sign bit is shifted with the rest of the number rather than being left alone
+            value >>>= 7;
+            if (value != 0) {
+                temp |= 0b10000000;
+            }
+            buf.writeByte(temp);
+        } while (value != 0);
+    }
+
+    @Deprecated
     public static int readVarIntLength(byte[] array, int startPos) {
         int numRead = 0;
         byte read;
@@ -130,6 +162,7 @@ public class ProtocolUtils {
         return numRead;
     }
 
+    @Deprecated
     public static byte[] writeVarInt(int value) {
         List<Byte> buffer = new ArrayList<>(5);
         do {
@@ -144,6 +177,7 @@ public class ProtocolUtils {
         return Bytes.toArray(buffer);
     }
 
+    @Deprecated
     public static class ChunkPos{
         final int x;
         final int z;

SpigotCore_Main/src/de/steamwar/techhider/ProtocolWrapper.java

@@ -33,7 +33,7 @@ public interface ProtocolWrapper {
 
     boolean unfilteredTileEntityDataAction(Object packet);
 
-    BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass);
+    BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator);
 
-    BiFunction<Player, Object, Object> multiBlockChangeGenerator(Object obfuscationTarget, Set<Material> obfuscate, TechHider.BypassEvaluator bypass);
+    BiFunction<Player, Object, Object> multiBlockChangeGenerator(Object obfuscationTarget, Set<Material> obfuscate, TechHider.LocationEvaluator locationEvaluator);
 }

SpigotCore_Main/src/de/steamwar/techhider/TechHider.java

@@ -37,6 +37,7 @@ public class TechHider {
     public static final Class<?> blockPosition = Reflection.getClass("{nms.core}.BlockPosition");
     private static final Class<?> baseBlockPosition = Reflection.getClass("{nms.core}.BaseBlockPosition");
     public static final Reflection.FieldAccessor<Integer> blockPositionX = Reflection.getField(baseBlockPosition, int.class, 0);
+    public static final Reflection.FieldAccessor<Integer> blockPositionY = Reflection.getField(baseBlockPosition, int.class, 1);
     public static final Reflection.FieldAccessor<Integer> blockPositionZ = Reflection.getField(baseBlockPosition, int.class, 2);
 
     public static final Class<?> iBlockData = Reflection.getClass("{nms.world.level.block.state}.IBlockData");
@@ -53,24 +54,29 @@ public class TechHider {
     }
 
     private final Map<Class<?>, BiFunction<Player, Object, Object>> techhiders = new HashMap<>();
-    private final BypassEvaluator bypass;
+    private final LocationEvaluator locationEvaluator;
     private final Object obfuscationTarget;
     private final Set<Material> obfuscate;
 
+    @Deprecated
     public TechHider(BypassEvaluator bypass, Material obfuscationTarget, Set<Material> obfuscate, Set<String> hiddenBlockEntities) {
-        this.bypass = bypass;
+        this((LocationEvaluator) (player, x, z) -> bypass.bypass(player, ProtocolUtils.posToChunk(x), ProtocolUtils.posToChunk(z)), obfuscationTarget, obfuscate, hiddenBlockEntities);
+    }
+
+    public TechHider(LocationEvaluator locationEvaluator, Material obfuscationTarget, Set<Material> obfuscate, Set<String> hiddenBlockEntities) {
+        this.locationEvaluator = locationEvaluator;
         this.obfuscate = obfuscate;
         this.obfuscationTarget = getBlockDataByBlock.invoke(getBlockByMaterial.invoke(null, obfuscationTarget));
 
         techhiders.put(blockActionPacket, this::blockActionHider);
         techhiders.put(blockChangePacket, this::blockChangeHider);
         techhiders.put(tileEntityDataPacket, this::tileEntityDataHider);
-        techhiders.put(multiBlockChangePacket,ProtocolWrapper.impl.multiBlockChangeGenerator(this.obfuscationTarget, obfuscate, bypass));
-        techhiders.put(ChunkHider.impl.mapChunkPacket(), ChunkHider.impl.chunkHiderGenerator(bypass, BlockIds.impl.materialToId(obfuscationTarget), obfuscate.stream().flatMap(m -> BlockIds.impl.materialToAllIds(m).stream()).collect(Collectors.toSet()), hiddenBlockEntities));
+        techhiders.put(multiBlockChangePacket, ProtocolWrapper.impl.multiBlockChangeGenerator(this.obfuscationTarget, obfuscate, locationEvaluator));
+        techhiders.put(ChunkHider.impl.mapChunkPacket(), ChunkHider.impl.chunkHiderGenerator(locationEvaluator, BlockIds.impl.materialToId(obfuscationTarget), obfuscate.stream().flatMap(m -> BlockIds.impl.materialToAllIds(m).stream()).collect(Collectors.toSet()), hiddenBlockEntities));
 
         if(Core.getVersion() > 12 && Core.getVersion() < 19) {
             Class<?> blockBreakClass = Reflection.getClass("{nms.network.protocol.game}.PacketPlayOutBlockBreak");
-            techhiders.put(blockBreakClass, ProtocolWrapper.impl.blockBreakHiderGenerator(blockBreakClass, this.obfuscationTarget, obfuscate, bypass));
+            techhiders.put(blockBreakClass, ProtocolWrapper.impl.blockBreakHiderGenerator(blockBreakClass, this.obfuscationTarget, obfuscate, locationEvaluator));
         }
 
         if(Core.getVersion() > 8){
@@ -96,22 +102,23 @@ public class TechHider {
     private static final Reflection.FieldAccessor<?> blockChangePosition = Reflection.getField(blockChangePacket, blockPosition, 0);
     private static final Reflection.FieldAccessor<?> blockChangeBlockData = Reflection.getField(blockChangePacket, iBlockData, 0);
     private Object blockChangeHider(Player p, Object packet) {
-        Object pos = blockChangePosition.get(packet);
-        if(bypass.bypass(p, ProtocolUtils.posToChunk(blockPositionX.get(pos)), ProtocolUtils.posToChunk(blockPositionZ.get(pos))))
-            return packet;
-
-        if(iBlockDataHidden(obfuscate, blockChangeBlockData.get(packet))) {
-            packet = blockChangeCloner.apply(packet);
-            blockChangeBlockData.set(packet, obfuscationTarget);
+        switch (locationEvaluator.checkBlockPos(p, blockChangePosition.get(packet))) {
+            case SKIP:
+                return packet;
+            case CHECK:
+                if(!iBlockDataHidden(obfuscate, blockChangeBlockData.get(packet)))
+                    return packet;
+            default:
+                packet = blockChangeCloner.apply(packet);
+                blockChangeBlockData.set(packet, obfuscationTarget);
+                return packet;
         }
-        return packet;
     }
 
     private static final Class<?> blockActionPacket = Reflection.getClass("{nms.network.protocol.game}.PacketPlayOutBlockAction");
     private static final Reflection.FieldAccessor<?> blockActionPosition = Reflection.getField(blockActionPacket, blockPosition, 0);
     private Object blockActionHider(Player p, Object packet) {
-        Object pos = blockActionPosition.get(packet);
-        if(bypass.bypass(p, ProtocolUtils.posToChunk(blockPositionX.get(pos)), ProtocolUtils.posToChunk(blockPositionZ.get(pos))))
+        if (locationEvaluator.checkBlockPos(p, blockActionPosition.get(packet)) == State.SKIP)
             return packet;
         return null;
     }
@@ -119,16 +126,43 @@ public class TechHider {
     public static final Class<?> tileEntityDataPacket = Reflection.getClass("{nms.network.protocol.game}.PacketPlayOutTileEntityData");
     private static final Reflection.FieldAccessor<?> tileEntityDataPosition = Reflection.getField(tileEntityDataPacket, blockPosition, 0);
     private Object tileEntityDataHider(Player p, Object packet) {
-        Object pos = tileEntityDataPosition.get(packet);
-        if(bypass.bypass(p, ProtocolUtils.posToChunk(blockPositionX.get(pos)), ProtocolUtils.posToChunk(blockPositionZ.get(pos))))
-            return packet;
-
-        if(ProtocolWrapper.impl.unfilteredTileEntityDataAction(packet))
-            return packet;
-        return null;
+        switch (locationEvaluator.checkBlockPos(p, tileEntityDataPosition.get(packet))) {
+            case SKIP:
+                return packet;
+            case CHECK:
+                if(ProtocolWrapper.impl.unfilteredTileEntityDataAction(packet))
+                    return packet;
+            default:
+                return null;
+        }
     }
 
+    @Deprecated
     public interface BypassEvaluator {
         boolean bypass(Player p, int chunkX, int chunkZ);
     }
+
+    public enum State {
+        SKIP,
+        CHECK,
+        HIDE
+    }
+
+    public interface LocationEvaluator {
+        boolean skipChunk(Player player, int x, int z);
+        default boolean skipChunkSection(Player player, int x, int y, int z) {
+            return skipChunk(player, x, z);
+        }
+        default State check(Player player, int x, int y, int z) {
+            return skipChunkSection(player, ProtocolUtils.posToChunk(x), ProtocolUtils.posToChunk(y), ProtocolUtils.posToChunk(z)) ? State.SKIP : State.CHECK;
+        }
+
+        default State checkBlockPos(Player player, Object pos) {
+            return check(player, blockPositionX.get(pos), blockPositionY.get(pos), blockPositionZ.get(pos));
+        }
+
+        default boolean blockPrecise(Player player, int x, int y, int z) {
+            return false;
+        }
+    }
 }

build.gradle

@@ -45,7 +45,6 @@ mainClassName = ''
 allprojects {
     repositories {
         mavenCentral()
-        jcenter()
 
         maven {
             url = uri("https://repo.codemc.io/repository/maven-snapshots/")
@@ -53,14 +52,23 @@ allprojects {
 
         maven {
             url = uri('https://hub.spigotmc.org/nexus/content/repositories/snapshots/')
+            content {
+                includeGroup('org.spigotmc')
+            }
         }
 
         maven {
              url = uri('https://libraries.minecraft.net')
+            content {
+                includeGroup('com.mojang')
+            }
         }
 
         maven {
             url = uri('https://repo.viaversion.com')
+            content {
+                includeGroup('com.viaversion')
+            }
         }
     }
 }