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https://github.com/PaperMC/Paper.git
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01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
171 lines
11 KiB
Diff
171 lines
11 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 2 Jul 2020 12:02:43 -0700
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Subject: [PATCH] Optimise collision checking in player move packet handling
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Move collision logic to just the hasNewCollision call instead of getCubes + hasNewCollision
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 1d024bfbada440c93b1174568feaa67544f7f0d2..f5a2299e43e4e7863aff9f0fb5ed1773b1330c7a 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -655,7 +655,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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return;
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}
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- boolean flag = worldserver.noCollision(entity, entity.getBoundingBox().deflate(0.0625D));
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+ AABB oldBox = entity.getBoundingBox(); // Paper - copy from player movement packet
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d6 = d3 - this.vehicleLastGoodX; // Paper - diff on change, used for checking large move vectors above
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d7 = d4 - this.vehicleLastGoodY - 1.0E-6D; // Paper - diff on change, used for checking large move vectors above
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@@ -663,6 +663,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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boolean flag1 = entity.verticalCollisionBelow;
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entity.move(MoverType.PLAYER, new Vec3(d6, d7, d8));
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+ boolean didCollide = toX != entity.getX() || toY != entity.getY() || toZ != entity.getZ(); // Paper - needed here as the difference in Y can be reset - also note: this is only a guess at whether collisions took place, floating point errors can make this true when it shouldn't be...
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double d11 = d7;
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d6 = d3 - entity.getX();
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@@ -676,16 +677,24 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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boolean flag2 = false;
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if (d10 > org.spigotmc.SpigotConfig.movedWronglyThreshold) { // Spigot
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- flag2 = true;
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+ flag2 = true; // Paper - diff on change, this should be moved wrongly
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ServerGamePacketListenerImpl.LOGGER.warn("{} (vehicle of {}) moved wrongly! {}", new Object[]{entity.getName().getString(), this.player.getName().getString(), Math.sqrt(d10)});
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}
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Location curPos = this.getCraftPlayer().getLocation(); // Spigot
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entity.absMoveTo(d3, d4, d5, f, f1);
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this.player.absMoveTo(d3, d4, d5, this.player.getYRot(), this.player.getXRot()); // CraftBukkit
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- boolean flag3 = worldserver.noCollision(entity, entity.getBoundingBox().deflate(0.0625D));
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- if (flag && (flag2 || !flag3)) {
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+ // Paper start - optimise out extra getCubes
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+ boolean teleportBack = flag2; // violating this is always a fail
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+ if (!teleportBack) {
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+ // note: only call after setLocation, or else getBoundingBox is wrong
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+ AABB newBox = entity.getBoundingBox();
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+ if (didCollide || !oldBox.equals(newBox)) {
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+ teleportBack = this.hasNewCollision(worldserver, entity, oldBox, newBox);
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+ } // else: no collision at all detected, why do we care?
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+ }
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+ if (teleportBack) { // Paper end - optimise out extra getCubes
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entity.absMoveTo(d0, d1, d2, f, f1);
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this.player.absMoveTo(d0, d1, d2, this.player.getYRot(), this.player.getXRot()); // CraftBukkit
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this.connection.send(new ClientboundMoveVehiclePacket(entity));
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@@ -771,7 +780,32 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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private boolean noBlocksAround(Entity entity) {
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- return entity.level.getBlockStates(entity.getBoundingBox().inflate(0.0625D).expandTowards(0.0D, -0.55D, 0.0D)).allMatch(BlockBehaviour.BlockStateBase::isAir);
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+ // Paper start - stop using streams, this is already a known fixed problem in Entity#move
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+ AABB box = entity.getBoundingBox().inflate(0.0625D).expandTowards(0.0D, -0.55D, 0.0D);
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+ int minX = Mth.floor(box.minX);
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+ int minY = Mth.floor(box.minY);
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+ int minZ = Mth.floor(box.minZ);
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+ int maxX = Mth.floor(box.maxX);
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+ int maxY = Mth.floor(box.maxY);
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+ int maxZ = Mth.floor(box.maxZ);
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+
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+ Level world = entity.level;
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+ BlockPos.MutableBlockPos pos = new BlockPos.MutableBlockPos();
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+
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+ for (int y = minY; y <= maxY; ++y) {
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+ for (int z = minZ; z <= maxZ; ++z) {
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+ for (int x = minX; x <= maxX; ++x) {
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+ pos.set(x, y, z);
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+ BlockState type = world.getBlockStateIfLoaded(pos);
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+ if (type != null && !type.isAir()) {
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+ return false;
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+ }
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+ }
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+ }
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+ }
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+
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+ return true;
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+ // Paper end - stop using streams, this is already a known fixed problem in Entity#move
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}
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@Override
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@@ -1351,7 +1385,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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if (this.awaitingPositionFromClient != null) {
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- if (this.tickCount - this.awaitingTeleportTime > 20) {
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+ if (false && this.tickCount - this.awaitingTeleportTime > 20) { // Paper - this will greatly screw with clients with > 1000ms RTT
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this.awaitingTeleportTime = this.tickCount;
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this.teleport(this.awaitingPositionFromClient.x, this.awaitingPositionFromClient.y, this.awaitingPositionFromClient.z, this.player.getYRot(), this.player.getXRot());
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}
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@@ -1445,7 +1479,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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}
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- AABB axisalignedbb = this.player.getBoundingBox();
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+ AABB axisalignedbb = this.player.getBoundingBox(); // Paper - diff on change, should be old AABB
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d7 = d0 - this.lastGoodX; // Paper - diff on change, used for checking large move vectors above
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d8 = d1 - this.lastGoodY; // Paper - diff on change, used for checking large move vectors above
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@@ -1486,6 +1520,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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boolean flag1 = this.player.verticalCollisionBelow;
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this.player.move(MoverType.PLAYER, new Vec3(d7, d8, d9));
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+ boolean didCollide = toX != this.player.getX() || toY != this.player.getY() || toZ != this.player.getZ(); // Paper - needed here as the difference in Y can be reset - also note: this is only a guess at whether collisions took place, floating point errors can make this true when it shouldn't be...
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this.player.onGround = packet.isOnGround(); // CraftBukkit - SPIGOT-5810, SPIGOT-5835, SPIGOT-6828: reset by this.player.move
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// Paper start - prevent position desync
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if (this.awaitingPositionFromClient != null) {
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@@ -1505,12 +1540,23 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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boolean flag2 = false;
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if (!this.player.isChangingDimension() && d11 > org.spigotmc.SpigotConfig.movedWronglyThreshold && !this.player.isSleeping() && !this.player.gameMode.isCreative() && this.player.gameMode.getGameModeForPlayer() != GameType.SPECTATOR) { // Spigot
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- flag2 = true;
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+ flag2 = true; // Paper - diff on change, this should be moved wrongly
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ServerGamePacketListenerImpl.LOGGER.warn("{} moved wrongly!", this.player.getName().getString());
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}
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this.player.absMoveTo(d0, d1, d2, f, f1);
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- if (!this.player.noPhysics && !this.player.isSleeping() && (flag2 && worldserver.noCollision(this.player, axisalignedbb) || this.isPlayerCollidingWithAnythingNew(worldserver, axisalignedbb))) {
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+ // Paper start - optimise out extra getCubes
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+ // Original for reference:
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+ // boolean teleportBack = flag2 && worldserver.getCubes(this.player, axisalignedbb) || (didCollide && this.a((IWorldReader) worldserver, axisalignedbb));
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+ boolean teleportBack = flag2; // violating this is always a fail
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+ if (!this.player.noPhysics && !this.player.isSleeping() && !teleportBack) {
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+ AABB newBox = this.player.getBoundingBox();
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+ if (didCollide || !axisalignedbb.equals(newBox)) {
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+ // note: only call after setLocation, or else getBoundingBox is wrong
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+ teleportBack = this.hasNewCollision(worldserver, this.player, axisalignedbb, newBox);
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+ } // else: no collision at all detected, why do we care?
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+ }
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+ if (!this.player.noPhysics && !this.player.isSleeping() && teleportBack) { // Paper end - optimise out extra getCubes
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this.internalTeleport(d3, d4, d5, f, f1, Collections.emptySet(), false); // CraftBukkit - SPIGOT-1807: Don't call teleport event, when the client thinks the player is falling, because the chunks are not loaded on the client yet.
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} else {
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// CraftBukkit start - fire PlayerMoveEvent
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@@ -1596,6 +1642,27 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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}
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+ // Paper start - optimise out extra getCubes
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+ private boolean hasNewCollision(final ServerLevel world, final Entity entity, final AABB oldBox, final AABB newBox) {
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+ final List<AABB> collisions = io.papermc.paper.util.CachedLists.getTempCollisionList();
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+ try {
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+ io.papermc.paper.util.CollisionUtil.getCollisions(world, entity, newBox, collisions, false, true,
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+ true, false, null, null);
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+
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+ for (int i = 0, len = collisions.size(); i < len; ++i) {
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+ final AABB box = collisions.get(i);
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+ if (!io.papermc.paper.util.CollisionUtil.voxelShapeIntersect(box, oldBox)) {
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+ return true;
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+ }
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+ }
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+
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+ return false;
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+ } finally {
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+ io.papermc.paper.util.CachedLists.returnTempCollisionList(collisions);
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+ }
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+ }
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+ // Paper end - optimise out extra getCubes
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+
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private boolean isPlayerCollidingWithAnythingNew(LevelReader world, AABB box) {
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Iterable<VoxelShape> iterable = world.getCollisions(this.player, this.player.getBoundingBox().deflate(9.999999747378752E-6D));
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VoxelShape voxelshape = Shapes.create(box.deflate(9.999999747378752E-6D));
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