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ViaVersion/common/src/main/java/com/viaversion/viaversion/protocols/protocol1_14to1_13_2/packets/WorldPackets.java

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/*
* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
* Copyright (C) 2016-2021 ViaVersion and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.viaversion.viaversion.protocols.protocol1_14to1_13_2.packets;
import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
import com.github.steveice10.opennbt.tag.builtin.LongArrayTag;
import com.viaversion.viaversion.api.Via;
import com.viaversion.viaversion.api.connection.UserConnection;
import com.viaversion.viaversion.api.minecraft.BlockFace;
import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
import com.viaversion.viaversion.api.minecraft.chunks.NibbleArray;
import com.viaversion.viaversion.api.minecraft.entities.Entity1_14Types;
import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
import com.viaversion.viaversion.api.protocol.remapper.ValueCreator;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.types.Chunk1_13Type;
import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.Protocol1_14To1_13_2;
import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.storage.EntityTracker1_14;
import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.types.Chunk1_14Type;
import com.viaversion.viaversion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
import com.viaversion.viaversion.rewriter.BlockRewriter;
import com.viaversion.viaversion.util.CompactArrayUtil;
import java.util.Arrays;
public class WorldPackets {
public static final int SERVERSIDE_VIEW_DISTANCE = 64;
private static final byte[] FULL_LIGHT = new byte[2048];
public static int air;
public static int voidAir;
public static int caveAir;
static {
Arrays.fill(FULL_LIGHT, (byte) 0xff);
}
public static void register(Protocol1_14To1_13_2 protocol) {
BlockRewriter blockRewriter = new BlockRewriter(protocol, null);
protocol.registerClientbound(ClientboundPackets1_13.BLOCK_BREAK_ANIMATION, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.VAR_INT);
map(Type.POSITION, Type.POSITION1_14);
map(Type.BYTE);
}
});
protocol.registerClientbound(ClientboundPackets1_13.BLOCK_ENTITY_DATA, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.POSITION, Type.POSITION1_14);
}
});
protocol.registerClientbound(ClientboundPackets1_13.BLOCK_ACTION, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.POSITION, Type.POSITION1_14); // Location
map(Type.UNSIGNED_BYTE); // Action id
map(Type.UNSIGNED_BYTE); // Action param
map(Type.VAR_INT); // Block id - /!\ NOT BLOCK STATE
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
wrapper.set(Type.VAR_INT, 0, protocol.getMappingData().getNewBlockId(wrapper.get(Type.VAR_INT, 0)));
}
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.BLOCK_CHANGE, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.POSITION, Type.POSITION1_14);
map(Type.VAR_INT);
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
int id = wrapper.get(Type.VAR_INT, 0);
wrapper.set(Type.VAR_INT, 0, protocol.getMappingData().getNewBlockStateId(id));
}
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.SERVER_DIFFICULTY, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.UNSIGNED_BYTE);
create(new ValueCreator() {
@Override
public void write(PacketWrapper wrapper) throws Exception {
wrapper.write(Type.BOOLEAN, false); // Added in 19w11a. Maybe https://bugs.mojang.com/browse/MC-44471 ?
}
});
}
});
blockRewriter.registerMultiBlockChange(ClientboundPackets1_13.MULTI_BLOCK_CHANGE);
protocol.registerClientbound(ClientboundPackets1_13.EXPLOSION, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.FLOAT); // X
map(Type.FLOAT); // Y
map(Type.FLOAT); // Z
map(Type.FLOAT); // Radius
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
for (int i = 0; i < 3; i++) {
float coord = wrapper.get(Type.FLOAT, i);
if (coord < 0f) {
coord = (int) coord;
wrapper.set(Type.FLOAT, i, coord);
}
}
}
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.CHUNK_DATA, new PacketRemapper() {
@Override
public void registerMap() {
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
Chunk chunk = wrapper.read(new Chunk1_13Type(clientWorld));
wrapper.write(new Chunk1_14Type(), chunk);
int[] motionBlocking = new int[16 * 16];
int[] worldSurface = new int[16 * 16];
for (int s = 0; s < chunk.getSections().length; s++) {
ChunkSection section = chunk.getSections()[s];
if (section == null) continue;
boolean hasBlock = false;
for (int i = 0; i < section.getPaletteSize(); i++) {
int old = section.getPaletteEntry(i);
int newId = protocol.getMappingData().getNewBlockStateId(old);
if (!hasBlock && newId != air && newId != voidAir && newId != caveAir) { // air, void_air, cave_air
hasBlock = true;
}
section.setPaletteEntry(i, newId);
}
if (!hasBlock) {
section.setNonAirBlocksCount(0);
continue;
}
int nonAirBlockCount = 0;
for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
for (int z = 0; z < 16; z++) {
int id = section.getFlatBlock(x, y, z);
if (id != air && id != voidAir && id != caveAir) {
nonAirBlockCount++;
worldSurface[x + z * 16] = y + s * 16 + 1; // +1 (top of the block)
}
if (protocol.getMappingData().getMotionBlocking().contains(id)) {
motionBlocking[x + z * 16] = y + s * 16 + 1; // +1 (top of the block)
}
// Manually update light for non full blocks (block light must not be sent)
if (Via.getConfig().isNonFullBlockLightFix() && protocol.getMappingData().getNonFullBlocks().contains(id)) {
setNonFullLight(chunk, section, s, x, y, z);
}
}
}
}
section.setNonAirBlocksCount(nonAirBlockCount);
}
CompoundTag heightMap = new CompoundTag();
heightMap.put("MOTION_BLOCKING", new LongArrayTag(encodeHeightMap(motionBlocking)));
heightMap.put("WORLD_SURFACE", new LongArrayTag(encodeHeightMap(worldSurface)));
chunk.setHeightMap(heightMap);
PacketWrapper lightPacket = wrapper.create(ClientboundPackets1_14.UPDATE_LIGHT);
lightPacket.write(Type.VAR_INT, chunk.getX());
lightPacket.write(Type.VAR_INT, chunk.getZ());
int skyLightMask = chunk.isFullChunk() ? 0x3ffff : 0; // all 18 bits set if ground up
int blockLightMask = 0;
for (int i = 0; i < chunk.getSections().length; i++) {
ChunkSection sec = chunk.getSections()[i];
if (sec == null) continue;
if (!chunk.isFullChunk() && sec.getLight().hasSkyLight()) {
skyLightMask |= (1 << (i + 1));
}
blockLightMask |= (1 << (i + 1));
}
lightPacket.write(Type.VAR_INT, skyLightMask);
lightPacket.write(Type.VAR_INT, blockLightMask);
lightPacket.write(Type.VAR_INT, 0); // empty sky light mask
lightPacket.write(Type.VAR_INT, 0); // empty block light mask
// not sending skylight/setting empty skylight causes client lag due to some weird calculations
// only do this on the initial chunk send (not when chunk.isGroundUp() is false)
if (chunk.isFullChunk())
lightPacket.write(Type.BYTE_ARRAY_PRIMITIVE, FULL_LIGHT); // chunk below 0
for (ChunkSection section : chunk.getSections()) {
if (section == null || !section.getLight().hasSkyLight()) {
if (chunk.isFullChunk()) {
lightPacket.write(Type.BYTE_ARRAY_PRIMITIVE, FULL_LIGHT);
}
continue;
}
lightPacket.write(Type.BYTE_ARRAY_PRIMITIVE, section.getLight().getSkyLight());
}
if (chunk.isFullChunk())
lightPacket.write(Type.BYTE_ARRAY_PRIMITIVE, FULL_LIGHT); // chunk above 255
for (ChunkSection section : chunk.getSections()) {
if (section == null) continue;
lightPacket.write(Type.BYTE_ARRAY_PRIMITIVE, section.getLight().getBlockLight());
}
EntityTracker1_14 entityTracker = wrapper.user().getEntityTracker(Protocol1_14To1_13_2.class);
int diffX = Math.abs(entityTracker.getChunkCenterX() - chunk.getX());
int diffZ = Math.abs(entityTracker.getChunkCenterZ() - chunk.getZ());
if (entityTracker.isForceSendCenterChunk()
|| diffX >= SERVERSIDE_VIEW_DISTANCE
|| diffZ >= SERVERSIDE_VIEW_DISTANCE) {
PacketWrapper fakePosLook = wrapper.create(ClientboundPackets1_14.UPDATE_VIEW_POSITION); // Set center chunk
fakePosLook.write(Type.VAR_INT, chunk.getX());
fakePosLook.write(Type.VAR_INT, chunk.getZ());
fakePosLook.send(Protocol1_14To1_13_2.class);
entityTracker.setChunkCenterX(chunk.getX());
entityTracker.setChunkCenterZ(chunk.getZ());
}
lightPacket.send(Protocol1_14To1_13_2.class);
// Remove light references from chunk sections
for (ChunkSection section : chunk.getSections()) {
if (section != null) {
section.setLight(null);
}
}
}
private Byte[] fromPrimitiveArray(byte[] bytes) {
Byte[] newArray = new Byte[bytes.length];
for (int i = 0; i < bytes.length; i++) {
newArray[i] = bytes[i];
}
return newArray;
}
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.EFFECT, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.INT); // Effect Id
map(Type.POSITION, Type.POSITION1_14); // Location
map(Type.INT); // Data
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
int id = wrapper.get(Type.INT, 0);
int data = wrapper.get(Type.INT, 1);
if (id == 1010) { // Play record
wrapper.set(Type.INT, 1, protocol.getMappingData().getNewItemId(data));
} else if (id == 2001) { // Block break + block break sound
wrapper.set(Type.INT, 1, protocol.getMappingData().getNewBlockStateId(data));
}
}
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.JOIN_GAME, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.INT); // 0 - Entity ID
map(Type.UNSIGNED_BYTE); // 1 - Gamemode
map(Type.INT); // 2 - Dimension
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
// Store the player
ClientWorld clientChunks = wrapper.user().get(ClientWorld.class);
int dimensionId = wrapper.get(Type.INT, 1);
clientChunks.setEnvironment(dimensionId);
int entityId = wrapper.get(Type.INT, 0);
Entity1_14Types entType = Entity1_14Types.PLAYER;
// Register Type ID
EntityTracker1_14 tracker = wrapper.user().getEntityTracker(Protocol1_14To1_13_2.class);
tracker.addEntity(entityId, entType);
tracker.setClientEntityId(entityId);
}
});
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
short difficulty = wrapper.read(Type.UNSIGNED_BYTE); // 19w11a removed difficulty from join game
PacketWrapper difficultyPacket = wrapper.create(ClientboundPackets1_14.SERVER_DIFFICULTY);
difficultyPacket.write(Type.UNSIGNED_BYTE, difficulty);
difficultyPacket.write(Type.BOOLEAN, false); // Unknown value added in 19w11a
difficultyPacket.send(protocol.getClass());
wrapper.passthrough(Type.UNSIGNED_BYTE); // Max Players
wrapper.passthrough(Type.STRING); // Level Type
wrapper.write(Type.VAR_INT, SERVERSIDE_VIEW_DISTANCE); // Serverside view distance, added in 19w13a
}
});
handler(wrapper -> {
// Manually send the packet
wrapper.send(Protocol1_14To1_13_2.class);
wrapper.cancel();
// View distance has to be sent after the join packet
sendViewDistancePacket(wrapper.user());
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.MAP_DATA, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.VAR_INT);
map(Type.BYTE);
map(Type.BOOLEAN);
create(new ValueCreator() {
@Override
public void write(PacketWrapper wrapper) throws Exception {
wrapper.write(Type.BOOLEAN, false); // new value, probably if the map is locked (added in 19w02a), old maps are not locked
}
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.RESPAWN, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.INT); // 0 - Dimension ID
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
int dimensionId = wrapper.get(Type.INT, 0);
clientWorld.setEnvironment(dimensionId);
EntityTracker1_14 entityTracker = wrapper.user().getEntityTracker(Protocol1_14To1_13_2.class);
// The client may reset the center chunk if dimension is changed
entityTracker.setForceSendCenterChunk(true);
}
});
handler(new PacketHandler() {
@Override
public void handle(PacketWrapper wrapper) throws Exception {
short difficulty = wrapper.read(Type.UNSIGNED_BYTE); // 19w11a removed difficulty from respawn
PacketWrapper difficultyPacket = wrapper.create(ClientboundPackets1_14.SERVER_DIFFICULTY);
difficultyPacket.write(Type.UNSIGNED_BYTE, difficulty);
difficultyPacket.write(Type.BOOLEAN, false); // Unknown value added in 19w11a
difficultyPacket.send(protocol.getClass());
}
});
handler(wrapper -> {
// Manually send the packet and update the viewdistance after
wrapper.send(Protocol1_14To1_13_2.class);
wrapper.cancel();
sendViewDistancePacket(wrapper.user());
});
}
});
protocol.registerClientbound(ClientboundPackets1_13.SPAWN_POSITION, new PacketRemapper() {
@Override
public void registerMap() {
map(Type.POSITION, Type.POSITION1_14);
}
});
}
private static void sendViewDistancePacket(UserConnection connection) throws Exception {
PacketWrapper setViewDistance = PacketWrapper.create(ClientboundPackets1_14.UPDATE_VIEW_DISTANCE, null, connection);
setViewDistance.write(Type.VAR_INT, WorldPackets.SERVERSIDE_VIEW_DISTANCE);
setViewDistance.send(Protocol1_14To1_13_2.class);
}
private static long[] encodeHeightMap(int[] heightMap) {
return CompactArrayUtil.createCompactArray(9, heightMap.length, i -> heightMap[i]);
}
private static void setNonFullLight(Chunk chunk, ChunkSection section, int ySection, int x, int y, int z) {
int skyLight = 0;
int blockLight = 0;
for (BlockFace blockFace : BlockFace.values()) {
NibbleArray skyLightArray = section.getLight().getSkyLightNibbleArray();
NibbleArray blockLightArray = section.getLight().getBlockLightNibbleArray();
int neighbourX = x + blockFace.getModX();
int neighbourY = y + blockFace.getModY();
int neighbourZ = z + blockFace.getModZ();
if (blockFace.getModX() != 0) {
// Another chunk, nothing we can do without an unnecessary amount of caching
if (neighbourX == 16 || neighbourX == -1) continue;
} else if (blockFace.getModY() != 0) {
if (neighbourY == 16 || neighbourY == -1) {
if (neighbourY == 16) {
ySection += 1;
neighbourY = 0;
} else {
ySection -= 1;
neighbourY = 15;
}
if (ySection == 16 || ySection == -1) continue;
ChunkSection newSection = chunk.getSections()[ySection];
if (newSection == null) continue;
skyLightArray = newSection.getLight().getSkyLightNibbleArray();
blockLightArray = newSection.getLight().getBlockLightNibbleArray();
}
} else if (blockFace.getModZ() != 0) {
// Another chunk, nothing we can do without an unnecessary amount of caching
if (neighbourZ == 16 || neighbourZ == -1) continue;
}
if (blockLightArray != null && blockLight != 15) {
int neighbourBlockLight = blockLightArray.get(neighbourX, neighbourY, neighbourZ);
if (neighbourBlockLight == 15) {
blockLight = 14;
} else if (neighbourBlockLight > blockLight) {
blockLight = neighbourBlockLight - 1; // lower light level by one
}
}
if (skyLightArray != null && skyLight != 15) {
int neighbourSkyLight = skyLightArray.get(neighbourX, neighbourY, neighbourZ);
if (neighbourSkyLight == 15) {
if (blockFace.getModY() == 1) {
// Keep 15 if block is exposed to sky
skyLight = 15;
continue;
}
skyLight = 14;
} else if (neighbourSkyLight > skyLight) {
skyLight = neighbourSkyLight - 1; // lower light level by one
}
}
}
if (skyLight != 0) {
if (!section.getLight().hasSkyLight()) {
byte[] newSkyLight = new byte[2028];
section.getLight().setSkyLight(newSkyLight);
}
section.getLight().getSkyLightNibbleArray().set(x, y, z, skyLight);
}
if (blockLight != 0) {
section.getLight().getBlockLightNibbleArray().set(x, y, z, blockLight);
}
}
private static long getChunkIndex(int x, int z) {
return ((x & 0x3FFFFFFL) << 38) | (z & 0x3FFFFFFL);
}
}
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