mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-23 23:57:43 +01:00
101 lines
4.7 KiB
Diff
101 lines
4.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: MeFisto94 <MeFisto94@users.noreply.github.com>
|
|
Date: Tue, 12 May 2020 23:02:43 +0200
|
|
Subject: [PATCH] Workaround for Client Lag Spikes (MC-162253)
|
|
|
|
When crossing certain chunk boundaries, the client needlessly
|
|
calculates light maps for chunk neighbours. In some specific map
|
|
configurations, these calculations cause a 500ms+ freeze on the Client.
|
|
|
|
This patch basically serves as a workaround by sending light maps
|
|
to the client, so that it doesn't attempt to calculate them.
|
|
This mitigates the frametime impact to a minimum (but it's still there).
|
|
|
|
1.17 UPDATE NOTE: More or less untested, mapped version of the patch: https://paste.gg/p/anonymous/594123c7ce7d4d398d8834af6ba386d1
|
|
|
|
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
index d8f99f7f5ca0e1dbbb9b760af3a4b4f9c52ef6c7..f700ac973ebc3037a5a44eac3c9d505b98adce41 100644
|
|
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
@@ -1906,9 +1906,68 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
|
|
|
|
public void playerLoadedChunk(ServerPlayer player, Packet<?>[] packets, LevelChunk chunk) { // Paper - private -> public
|
|
if (packets[0] == null) {
|
|
+ // Paper start - add 8 for light fix workaround
|
|
+ if (packets.length != 10) { // in case Plugins call sendChunk, resize
|
|
+ packets = new Packet[10];
|
|
+ }
|
|
+ // Paper end
|
|
packets[0] = new ClientboundLevelChunkPacket(chunk);
|
|
packets[1] = new ClientboundLightUpdatePacket(chunk.getPos(), this.lightEngine, (BitSet) null, (BitSet) null, true);
|
|
+
|
|
+ // Paper start - Fix MC-162253
|
|
+ final int lightMask = getLightMask(chunk);
|
|
+ int i = 1;
|
|
+ for (int x = -1; x <= 1; x++) {
|
|
+ for (int z = -1; z <= 1; z++) {
|
|
+ if (x == 0 && z == 0) {
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ ++i;
|
|
+
|
|
+ if (!chunk.isNeighbourLoaded(x, z)) {
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ final LevelChunk neighbor = chunk.getRelativeNeighbourIfLoaded(x, z);
|
|
+ final int updateLightMask = lightMask & ~getCeilingLightMask(neighbor);
|
|
+
|
|
+ if (updateLightMask == 0) {
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ packets[i] = new ClientboundLightUpdatePacket(new ChunkPos(chunk.getPos().x + x, chunk.getPos().z + z), lightEngine, null, null, updateLightMask, 0, true); // TODO: This line needs updating
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ final int viewDistance = playerViewDistanceBroadcastMap.getLastViewDistance(player);
|
|
+ final long lastPosition = playerViewDistanceBroadcastMap.getLastCoordinate(player);
|
|
+
|
|
+ int j = 1;
|
|
+ for (int x = -1; x <= 1; x++) {
|
|
+ for (int z = -1; z <= 1; z++) {
|
|
+ if (x == 0 && z == 0) {
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ ++j;
|
|
+
|
|
+ Packet<?> packet = packets[j];
|
|
+ if (packet == null) {
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ final int distX = Math.abs(MCUtil.getCoordinateX(lastPosition) - (chunk.getPos().x + x));
|
|
+ final int distZ = Math.abs(MCUtil.getCoordinateZ(lastPosition) - (chunk.getPos().z + z));
|
|
+
|
|
+ if (Math.max(distX, distZ) > viewDistance) {
|
|
+ continue;
|
|
+ }
|
|
+ player.connection.send(packet);
|
|
+ }
|
|
}
|
|
+ // Paper end - Fix MC-162253
|
|
|
|
player.trackChunk(chunk.getPos(), packets[0], packets[1]);
|
|
DebugPackets.sendPoiPacketsForChunk(this.level, chunk.getPos());
|
|
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
|
|
index a63dc77db41dab79f03ef7384da55c1cdeca5d98..7cced5d06f296fcdc1209a43e7b3d1d9b47c0b26 100644
|
|
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
|
|
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
|
|
@@ -262,7 +262,7 @@ public class LevelChunk implements ChunkAccess {
|
|
|
|
// broadcast
|
|
Object[] backingSet = inRange.getBackingSet();
|
|
- Packet[] chunkPackets = new Packet[2];
|
|
+ Packet[] chunkPackets = new Packet[10];
|
|
for (int index = 0, len = backingSet.length; index < len; ++index) {
|
|
Object temp = backingSet[index];
|
|
if (!(temp instanceof net.minecraft.server.level.ServerPlayer)) {
|