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Mirror von https://github.com/PaperMC/Paper.git synchronisiert 2024-12-15 02:50:09 +01:00
Paper/patches/server/0372-Ensure-Entity-position-and-AABB-are-never-invalid.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.

To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.

These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.

Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
2024-09-19 16:36:07 +02:00

66 Zeilen
3.2 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 10 May 2020 22:12:46 -0400
Subject: [PATCH] Ensure Entity position and AABB are never invalid
Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 10015beb7a2de890fe27bffde8f55c1dd78ce344..9d08d0610be1741b4cd18a1454e538f46928fd94 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -669,8 +669,8 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
}
public void setPos(double x, double y, double z) {
- this.setPosRaw(x, y, z);
- this.setBoundingBox(this.makeBoundingBox());
+ this.setPosRaw(x, y, z, true); // Paper - Block invalid positions and bounding box; force update
+ // this.setBoundingBox(this.makeBoundingBox()); // Paper - Block invalid positions and bounding box; move into setPosRaw
}
protected AABB makeBoundingBox() {
@@ -4223,7 +4223,29 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
return this.getZ((2.0D * this.random.nextDouble() - 1.0D) * widthScale);
}
+ // Paper start - Block invalid positions and bounding box
+ public static boolean checkPosition(Entity entity, double newX, double newY, double newZ) {
+ if (Double.isFinite(newX) && Double.isFinite(newY) && Double.isFinite(newZ)) {
+ return true;
+ }
+
+ String entityInfo;
+ try {
+ entityInfo = entity.toString();
+ } catch (Exception ex) {
+ entityInfo = "[Entity info unavailable] ";
+ }
+ LOGGER.error("New entity position is invalid! Tried to set invalid position ({},{},{}) for entity {} located at {}, entity info: {}", newX, newY, newZ, entity.getClass().getName(), entity.position, entityInfo, new Throwable());
+ return false;
+ }
public final void setPosRaw(double x, double y, double z) {
+ this.setPosRaw(x, y, z, false);
+ }
+ public final void setPosRaw(double x, double y, double z, boolean forceBoundingBoxUpdate) {
+ if (!checkPosition(this, x, y, z)) {
+ return;
+ }
+ // Paper end - Block invalid positions and bounding box
if (this.position.x != x || this.position.y != y || this.position.z != z) {
this.position = new Vec3(x, y, z);
int i = Mth.floor(x);
@@ -4241,6 +4263,12 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
this.levelCallback.onMove();
}
+ // Paper start - Block invalid positions and bounding box; don't allow desync of pos and AABB
+ // hanging has its own special logic
+ if (!(this instanceof net.minecraft.world.entity.decoration.HangingEntity) && (forceBoundingBoxUpdate || this.position.x != x || this.position.y != y || this.position.z != z)) {
+ this.setBoundingBox(this.makeBoundingBox());
+ }
+ // Paper end - Block invalid positions and bounding box
}
public void checkDespawn() {}